CN102724902A - Method for manufacturing secondary paper roll for tissue paper products and method for manufacturing tissue paper products - Google Patents

Abstract

Provided is a method for manufacturing a secondary wrap for a tissue paper product, wherein chemical liquid spray can be performed at low cost and the presence or absence of chemical liquid spray can be easily switched. The method for manufacturing a secondary wrap for a tissue paper product comprises the following steps: a laminating step (51) for laminating the primary continuous paper (S11, S12) drawn out from the plurality of primary paper rolls (JR) in the continuous direction thereof to form a laminated continuous paper (S2); a chemical liquid spraying step (53) for applying a chemical liquid in a sprayed state to the laminated continuous paper (S2); a slitting step (55) of slitting the laminated continuous sheet (S2) into a product width of the tissue paper product or a width of a multiple thereof; and a winding step (56) for coaxially winding the slit laminated continuous paper sheets (S2) to form a plurality of secondary paper rolls (R) having a product width of the tissue paper product or a width multiple of the product width.

Description

Method for manufacturing secondary paper roll for tissue paper products and method for manufacturing tissue paper products

technical field

The present invention relates to a method for manufacturing a secondary paper roll (secondary primary roll) for tissue paper products used in a multi-stand type interfolder (interfolder) and to manufacture the tissue paper products method.

Background technique

Boxed products of tissue paper are usually produced by folding a plurality of continuous tissue papers with an intermediate folder (folding device) while stacking them, cutting them to a predetermined length, etc. to obtain a bundle of tissue papers, and Bundles of sheets are stored in a storage box (テイシュカートン).

As examples of such intermediate folders, there are known multi-stand type (multi-connection) intermediate folders as disclosed in the following patent documents 1 and 2, and rotary type intermediate folders as disclosed in the following patent documents 3 and 4. machine etc.

As a conventional example of a manufacturing method using a multi-stand type intermediate folder, there are the following examples. That is, a primary paper roll (usually also called jumbo paper) is produced by making tissue paper in a papermaking facility and then coiling it. A plurality of primary paper rolls draw out a primary continuous sheet (シ ト), and the primary continuous sheet is overlapped and rolled up while performing slitting (divided into the product width or multiple widths of the tissue paper product in the width direction), Manufacturing of secondary paper rolls consisting of multiple layers.

After the secondary paper rolls produced by the laminator are taken out of the laminator, only the required number of secondary paper rolls are placed in the multi-stand type intermediate folder. Next, the secondary continuous paper is pulled out from the secondary paper roll and sent to the folding mechanism, where it is folded and stacked at the same time, and then cut into predetermined lengths to make a bundle of tissue paper, which is stored in a storage box.

Compared with the manufacturing method using other folding equipment, the manufacturing method using such a multi-stand type intermediate folder has multiple (usually 80 to 100 (base)) folding mechanisms, and thus has the advantage of high productivity.

However, in recent years, there has been an increasing demand for products in which chemical solutions such as moisturizers (also commonly referred to as "lotion chemical solutions") are applied to tissue paper products. For example, the following patent documents 5- Various schemes of the manufacturing method or apparatus disclosed in 7. Such tissue paper products containing lotion and chemicals are generally produced mainly by a rotary intermediate folder (for example, Patent Document 5 below). However, the rotary middle folder performs folding and cutting simultaneously in a direction perpendicular to the processing direction, and thus has a disadvantage of low productivity.

prior art literature

patent documents

Patent Document 1: US Patent No. 4052048 (Japanese Patent Publication No. 55-1215)

Patent Document 2: Japanese Patent Laid-Open No. 2006-240750

Patent Document 3: Japanese Patent Laid-Open No. 61-37668

Patent Document 4: Japanese Patent Application Laid-Open No. 5-124770

Patent Document 5: Japanese Patent Laid-Open No. 2004-322034

Patent Document 6: Japanese PCT Publication No. 2008-525103

Patent Document 7: Japanese Patent Laid-Open No. 2008-264564

Contents of the invention

The problem to be solved by the invention

Therefore, the inventors of the present invention conceived of manufacturing a tissue paper product to which a chemical solution is applied by a manufacturing method using a multi-stand type middle folder which is the same as a rotary type middle folder. higher than productivity.

However, in the case of manufacturing by a manufacturing method using a multi-stand type middle folder, if a chemical solution application process is separately provided from the laminator or the multi-stand type middle folder, there will be troubles in conveying the paper roll and A problem that consumes huge equipment costs. In addition, if the chemical solution application process is provided in the multi-stand type intermediate folder, it is necessary to separately install a production line for manufacturing tissue paper products to which the chemical solution is applied and a production line for producing tissue paper products that are not applied with the chemical solution. production line.

Therefore, the main object of the present invention is to provide a method for manufacturing a secondary paper roll for tissue paper products, which does not require large-scale equipment when manufacturing a secondary paper roll for tissue paper products using a multi-stand intermediate folder. Retrofitting, a small modification of existing equipment is enough, and although a single multi-stand intermediate folder is used, it is very difficult to switch to tissue paper products with chemical solution applied and non-chemical solution applied. Easy and excellent in productivity.

On the other hand, the mixing of paper powder can also be suppressed, and the chemical solution can be applied more stably.

means to solve the problem

Means for solving the above-mentioned problems and their effects are as follows.

[Invention according to claim 1]

A method for manufacturing a secondary paper roll for tissue paper products, which is a method for continuously manufacturing a plurality of secondary paper rolls for tissue paper products from a primary paper roll, the manufacturing method is characterized in that it has the following Described process:

a stacking process, in which the primary continuous paper drawn from a plurality of primary paper rolls is stacked along its continuous direction to form a stacked continuous paper;

A chemical solution spraying step, in which the chemical solution is applied to the laminated continuous paper in a sprayed state;

a slitting process in which the laminated continuous paper is slit to the product width or multiples thereof of the tissue paper product; and

A coiling process, in which the laminated continuous paper after slitting is coaxially coiled to form a plurality of secondary paper rolls of the product width of the tissue paper product or a multiple of its width.

(Effect)

In the present invention, a chemical solution spray is assembled in a so-called laminator that continuously manufactures a secondary paper roll for tissue paper products to be supplied to a multi-stand type intermediate folder from a primary paper roll after papermaking and winding. process to apply the chemical solution to the paper.

Therefore, there is no need for large-scale equipment modification, and it is sufficient to use a small-scale modification of the existing laminator, so there is an advantage that it is sufficient to use equipment with low investment equipment costs.

In addition, instead of installing the chemical spraying process in the multi-stand type intermediate folder, the chemical spraying process is incorporated in the laminator, so the tissue paper products with the chemical solution applied and the tissue paper without the chemical solution applied Product switching can be easily performed by switching whether or not to apply the chemical solution to the secondary paper roll for tissue paper products, so the productivity is excellent.

In addition, in the case of installing a chemical spraying process in a multi-stand type middle folder, for example, it is considered to install a plurality of chemical spraying devices equal to the number of layers of laminated paper, but this will not only lead to high equipment costs, but also extremely difficult to ensure In addition, it is substantially difficult to accurately manage the amount of provision in each device due to the installation space. Compared with this method, the production method of the present invention has excellent advantages in terms of equipment cost, application amount management, and the like.

On the other hand, in the case of a multi-stand type intermediate folder, the processing speed (the traveling speed of the sheet) is low, so as described in JP 2008-245780 A, in the rotary cylinder type processing machine, The chemical solution is applied during feeding of wide paper (for example, about 2 to 3 m).

However, it is considered that a tissue paper production line involving a multi-stand type intermediate folder can achieve a high speed of, for example, 700 to 1400 m/min. In this case, it is also necessary to perform the lamination process at the same speed in order to match the production speed in the lamination machine. In this high-speed laminator, for example, when the chemical solution is applied by gravure, flexo, roll coating, etc., a large amount of paper powder is generated mainly due to the friction between the paper traveling at high speed and the coating roller, and the coating chemical is mixed. In the liquid, its concentration changes, resulting in a change in the coating amount. On the other hand, in the present invention, since the application of the chemical solution is performed by spraying, the problems associated with the generation of paper dust are freed.

In addition, when applying the chemical solution by spraying according to the present invention, the situation that the fiber layer is pressed between the rollers in the state of containing the chemical solution, which is seen in methods such as gravure, flexo, and roll coating, does not occur, so it is possible to Get fluffier or thicker tissue paper.

[Invention according to claim 2]

The method of manufacturing a secondary paper roll for tissue paper products according to claim 1, wherein the chemical solution spraying step is performed after the laminating step and before the slitting step.

[Invention according to claim 3]

The method of manufacturing a secondary paper roll for tissue paper products according to claim 2, wherein a smoothing step of performing a smoothing treatment with a calender is provided between the lamination step and the chemical solution spraying step.

[Invention according to claim 4]

The method for manufacturing a secondary paper roll for tissue paper products according to claim 2, wherein a contact embossing step is provided between the chemical solution spraying step and the slitting step, and in the contact embossing step , applying linear contact embossing to prevent interlayer delamination on the laminated continuous paper.

[Invention according to claim 5]

The method for manufacturing a secondary paper roll for tissue paper products according to claim 1, wherein the application of the chemical solution is carried out by means of nozzle spraying.

[Invention according to claim 6]

The method of manufacturing a secondary paper roll for tissue paper products according to claim 1, wherein the application of the chemical solution is performed by a spin-wetting spray method.

[Invention according to claim 7]

Prepare a plurality of said secondary paper rolls obtained by any one of the preceding claims, arrange them in the direction of the production line in a multi-stand type intermediate folder, and draw out a plurality of secondary paper rolls from each secondary paper roll The secondary continuous paper is conveyed in its continuous direction, and stacked while being folded during its conveyance, and then a predetermined number of stacked sheets are cut at a predetermined length to form a tissue paper bundle, and the stack is stored in a storage box Inside.

Invention effect

In the production method of the present invention, the secondary paper roll for tissue paper products produced by the slitting process so as to have the product width of the tissue paper product or a multiple of the width thereof, a plurality of the thin sheets Secondary paper rolls for paper products are placed in a multi-stand intermediate folder. Next, the secondary continuous paper is continuously drawn out from the secondary paper roll placed in the multi-stand type intermediate folder, and sent to the folding mechanism, where it is stacked while being folded, and then cut into predetermined lengths. Tissue paper stacks, stored in the storage box.

In the present invention, the chemical solution is sprayed onto the laminated continuous paper in the manufacturing method of the secondary paper roll for tissue paper products. Therefore, the trouble of conveying the paper roll and the huge equipment cost will not be generated unlike the case where the chemical solution application process is provided separately from the laminator or the multi-stand type intermediate folder.

In addition, in the case of manufacturing a tissue paper product without chemical solution application, it is only necessary to manufacture without applying chemical solution in the manufacturing process of the secondary paper roll for tissue paper products, so that it can be easily manufactured. switch.

In the method for producing a secondary paper roll for tissue paper products according to the present invention, the chemical solution spraying step is preferably performed after the laminating step and before the slitting step. This is because, if the chemical solution spraying process is before the stacking process, it is necessary to set up equipment for applying the chemical solution to each continuous paper by spraying; Since the chemical solution is applied by spraying to the multi-layered continuous paper divided in the slitting process, the chemical solution leaks from the slit, which causes contamination of the rolls and breakage of the paper. If the chemical solution application process is performed between the lamination process and the slitting process, it is only necessary to prepare equipment for spraying the chemical liquid spray only to the laminated continuous paper that has not been divided by the slitting process. The loss of the chemical liquid is small, and the paper Less breakage and stable operation.

In the manufacturing method of the secondary paper roll for tissue paper products of this invention, it is preferable to have the smoothing process of performing a smoothing process with a calender etc.. By having a smoothing step, it is possible to manufacture a secondary paper roll for tissue paper products with a smooth surface.

Furthermore, the smoothing step is preferably performed between the lamination step and the contact embossing step. If the smoothing process is before the stacking process, there must be at least two devices for smoothing the outer surface of the outer paper of the laminated paper, otherwise the smoothing process that needs one after the stacking process cannot be obtained. The effect is the same, and in addition, in the case of using two calenders to obtain the same smoothness on the surface of the two outer layers of paper, the thickness of the paper is likely to be lost.

In the method for producing a secondary paper roll for tissue paper products according to the present invention, it is preferable to include a contact embossing step in which linear contact embossing for preventing delamination is applied to the laminated continuous paper.

This contact embossing step is preferably performed before the slitting step. If the contact embossing process is after the slitting process, contact embossing is applied to the laminated continuous paper with a slit cut into the product width, and two contact pressures (two lines) are formed at the end of the continuous product width laminated paper. embossing and therefore tends to break the paper compared to contact embossing across the entire width.

In the manufacturing method of the secondary paper roll for tissue paper products of the present invention, any known spraying method such as a nozzle spraying method and a rotary wetting spraying method can be used as the chemical spraying method.

Description of drawings

FIG. 1 is a schematic diagram showing a manufacturing apparatus and a manufacturing method of a primary paper roll.

Fig. 2 is a schematic view showing an example of a multi-stand type intermediate folder, as viewed from the front.

Fig. 3 is a schematic view showing an example of a multi-stand type intermediate folder, as viewed from the side.

Fig. 4 is a schematic diagram showing an example of a multi-stand type intermediate folder, as viewed from the front.

Fig. 5 is a longitudinal sectional view of a folded tissue paper.

In FIG. 6 , (a) is a view showing a state in which a bundle of tissue papers is stored in a storage box, and (b) is a partial cross-sectional view showing a state in which the tissue papers stored in the storage box are taken out.

Fig. 7 is an enlarged perspective view of a main part of a part related to a flap (folding plate).

Fig. 8 is an enlarged perspective view of main parts showing how to fold secondary continuous paper (thin paper).

Fig. 9 is an enlarged perspective view of main parts showing how to fold secondary continuous paper (thin paper).

10 is an enlarged perspective view of main parts showing how to fold secondary continuous paper (thin paper).

FIG. 11 is a schematic view showing a manufacturing apparatus and a manufacturing method of a secondary paper roll.

Fig. 12 is an enlarged view of main parts around the chemical solution spray unit shown in Fig. 11 .

FIG. 13 is a view showing a state where contact embossing is applied to stacked continuous paper by a contact embossing unit.

Fig. 14 is a schematic configuration diagram showing another example of a chemical liquid spray unit.

Fig. 15 is a schematic configuration diagram showing an example of another chemical solution spraying unit.

Fig. 16 is a schematic diagram showing another manufacturing facility and manufacturing method of a secondary paper roll.

Fig. 17 is a schematic view showing another manufacturing facility and manufacturing method of a secondary paper roll.

Fig. 18 is a schematic diagram showing another manufacturing facility and manufacturing method of a secondary paper roll.

Fig. 19 is a schematic view showing another manufacturing facility and manufacturing method of a secondary paper roll.

Fig. 20 is a schematic diagram showing a structure in which continuous sheets (thin sheets) are stacked. Figure 20 (A) is a cross-sectional view in the MD direction before chemical spraying, Figure 20 (B) is a top view before the chemical penetration process, and Figure 20 (C) is a view in the direction of arrow I-I.

Fig. 21 is a schematic view showing a surface unevenness structure of laminated continuous paper (thin paper). Figure 21(A) shows before chemical solution spraying, and Figure 21(B) shows chemical solution spraying.

Fig. 22 is a schematic diagram showing a chemical solution penetration step.

Fig. 23 is a diagram showing a method of measuring the MMD value of tissue paper.

Detailed ways

Next, embodiments of the present invention will be described. In addition, arrow HD in the figure shows a horizontal direction, and arrow LD shows an up-down direction.

〔Manufacture of primary paper roll〕

An example of a method of manufacturing a primary paper roll will be described with reference to FIG. 1 .

As shown in FIG. 1 , the wet paper W that has passed through the wire section is placed on the lower felt 111 to be transported, and then the wet paper W is held between the upper felt 110 and the lower felt 111 from the top. Water is squeezed by passing between the roller 112 and the bottom roller 113 . Thereafter, the squeezed wet paper W is attached to the surface of a Yankee dryer 115 via a touch roll 116 while being placed on the top felt 110 . Then, the wet paper W is dried by the Yankee dryer 115 , peeled off by the doctor blade 117 , and wound up to form a primary paper roll JR.

When performing this papermaking, for example, dispersants, dry paper strength enhancers, wet paper strength enhancers, softeners, release agents, adhesives, pH regulators such as sodium hydroxide, defoamers, preservatives, tack-killing agents, etc., can be added. Suitable chemicals such as fungicides and dyes.

In addition, in the manufacturing method of the primary paper roll, the smoothing process may be performed by the calender unit 118 after peeling by the scraper 117 .

〔Manufacture of secondary paper rolls for tissue paper products〕

A plurality of secondary paper rolls for tissue paper products were continuously produced from the primary paper roll JR produced in the above example. For example, as shown in Figure 11, the manufacturing equipment X1 (laminating machine X1) of secondary paper rolls for tissue paper products can accommodate at least two primary paper rolls JR manufactured by the above-mentioned examples, and the manufacturing equipment X1 has The primary continuous sheets (S11, S12 in the illustrated example) drawn out of the paper roll JR are stacked along the continuous direction to form a stacking unit 51 for stacking the continuous paper S2 (stacking process).

A pair of chemical solution spraying units 53 for spraying a chemical solution on the stacked continuous paper S2 conveyed by the stacking unit 51 is provided at the rear stage of the stacking unit 51, and at the rear stage of these chemical solution spraying units 53, a pair of chemical solution spray units 53 arranged in parallel The slitting unit 55 (slitting process) composed of a plurality of cutters, which slits the laminated continuous paper S2 delivered by the chemical spray unit 53, and cuts the product width of the tissue paper product or a multiple thereof width. In addition, a winding unit 56 is provided at the rear stage of the slitting unit 55, which coaxially winds the laminated continuous paper S2 slit by the slitting unit 55 to form a tissue paper product of the product width or more. Multiple secondary paper rolls R of double width. Here, the take-up unit 56 has two take-up cylinders 56A for guiding each of the slitting stacked continuous sheets S2 to the secondary paper roll R, and the two take-up cylinders 56A are the same as those of the secondary paper roll R. The outer peripheral surface guides the stacked continuous sheets S2 tangentially.

In the production of the secondary paper roll for tissue paper products according to the present embodiment, the processing speed (also the paper traveling speed during chemical spray application) is 100 to 1100 m/min, preferably 350 to 1050 m/min, more preferably 450-1000 m/min. If it is less than 100 m/min, the productivity will be low; on the other hand, if it exceeds 1100 m/min, the frequency of sheet breakage of the laminated continuous paper S2 may increase.

〔Processing with a multi-stand intermediate folder〕

Place multiple (for example, 1/2 of the number of product groups) secondary paper rolls R for tissue paper products manufactured in this way on a multi-stand intermediate folder, and pass the secondary continuous paper from the placed secondary paper rolls R is drawn out and conveyed in its continuous direction, and stacked while being folded while moving to manufacture a tissue paper bundle, and then a predetermined number of laminated papers are cut at a predetermined length to form a tissue paper bundle, The tissue paper bundle is stored in a storage box to manufacture a tissue paper product.

Next, an example of the multi-stand type intermediate folder and packaging form will be described.

An example of a multi-stand type intermediate folder is shown in FIGS. 2 and 3 . Reference numeral 2 in the figure denotes secondary paper rolls R, R, . For the secondary paper rolls R, R..., the required number of secondary paper rolls R, R... are placed side by side in a direction perpendicular to the plane of the illustration (horizontal direction in Figure 2, paper in Figure 3 front-back direction). For each secondary paper roll R, during the manufacturing process of the above-mentioned secondary paper roll for tissue paper products, it is slit into the width of the tissue paper product in multiples of the width of the tissue paper product, in the example shown in the illustration, it is doubled in width Carry out coiling and placement.

The continuous strip-shaped secondary continuous papers 3A and 3B unwound from the secondary paper roll R are guided by guide means such as guide rollers G1 , G1 and fed into the folding mechanism unit 20 . Furthermore, as shown in FIG. 4, the folding mechanism part 20 is provided with the folding plate group 21, and the folding plate group 21 is the folding board P, P... which arrange|positions in parallel in required number. Each flap P is provided with guide rollers G2 and G2 or guide round bar members G3 and G3 at appropriate positions for guiding a pair of continuous secondary continuous paper 3A or 3B. Furthermore, the conveyor 22 which receives and conveys the folded and stacked lamination|stacking belt 30 is provided below the folding plate P, P....

The folding mechanism using such flaps P, P... is a known mechanism based on US Pat. No. 4,052,048, for example. As shown in FIG. 5 , this folding mechanism folds each continuous secondary continuous paper 3A, 3B ... in a Z-shape, and at the same time makes the side ends of adjacent continuous secondary continuous paper 3A, 3B ... alternate with each other. stacking.

In FIGS. 7 to 10 , the folding mechanism part 20, in particular, the part related to the folding plate P is shown in detail. In this folding mechanism unit 20 , a pair of continuous secondary continuous paper sheets 3A and 3B are guided to each folding plate P. As shown in FIG. At this time, the continuous secondary continuous sheets 3A and 3B are guided while shifting their positions so that the side ends do not overlap with each other by the guide round bar members G3 and G3.

At the time of leading to the flap P, the continuous secondary continuous paper superimposed on the lower side is used as the first continuous secondary continuous paper 3A, and the continuous secondary continuous paper superimposed on the upper side is used as the second continuous secondary continuous paper 3A. In the case of continuous paper 3B, for these continuous secondary continuous paper 3A and 3B, as shown in Figure 5 and Figure 8, the first continuous secondary continuous paper 3A does not overlap with the second continuous secondary continuous paper 3B The side end e1 is turned over to the upper side of the second continuous secondary continuous paper 3B by the side plate P1 of the folding plate P, and as shown in FIGS. 5 and 9 , the second continuous secondary continuous paper 3B The side end e2 that does not overlap with the first continuous secondary continuous paper 3A is pulled from the slit P2 of the folding plate P to under the folding plate P to be folded to the lower side. At this time, as shown in FIGS. 5 and 10 , the side end e3 ( e1 ) of the continuous secondary continuous paper 3A stacked while being folded at the upstream flap P is guided from the slit P2 of the flap P to the Between the turned-over parts of the second continuous secondary continuous paper 3B. In this way, each continuous secondary continuous paper 3A, 3B... is folded in a Z shape, and the side ends of the adjacent continuous secondary continuous paper 3A and 3B alternate with each other. When the uppermost tissue paper is removed, the side ends of the lower tissue paper are pulled out.

With regard to the laminated tape 30 obtained by utilizing the multi-stand type intermediate folder 1 as above, as shown in FIG. As shown in FIG. 6( a ), the sheet bundle 30 a is further accommodated in a storage box B in a subsequent equipment. Furthermore, in the above multi-stand type intermediate folder 1, the direction of the paper on the laminating belt 30 is the longitudinal direction (MD direction) along the flow direction FL, and the transverse direction (CD direction) along the direction perpendicular to the flow direction. . Therefore, the direction of the tissue papers constituting the tissue paper bundle 30a obtained by cutting the laminated tape 30 at a predetermined length is along the extending direction of the folded portion of the tissue paper as shown in FIG. 6( a ). The longitudinal direction (MD direction), and the direction perpendicular to the extending direction of the folded portion of the tissue paper is the transverse direction (CD direction).

In FIG.6(b), an example of the product which accommodated the tissue paper bundle 30a in the storage box B is shown. A seam hole M is provided on the upper surface of the storage box B, and a part of the upper surface of the storage box B is broken by using the seam hole M, so that the upper surface of the storage box B is opened. This opening is covered with a film F having a longitudinal slit in the center, through which the tissue paper T can be removed.

In addition, as described above, with regard to the direction of the tissue papers constituting the tissue paper bundle 30a, the direction perpendicular to the extending direction of the folded portions of the tissue papers is the transverse direction (CD direction), so as shown in FIG. 6( As shown in b), when the tissue paper T is pulled out from the storage box B, the pulling direction is along the transverse direction of the tissue paper T (CD direction).

(Calender unit)

In addition, one or more calender units 52 for calendering the stacked continuous paper S2 may be provided in the manufacturing facility X1 of the secondary paper roll for tissue paper products described above.

The type of calendering in the calendering unit 52 is not particularly limited, but soft calendering or cold calendering is preferable for reasons of improving surface smoothness and adjusting paper thickness. Soft calendering is calendering using rolls coated with elastic materials such as urethane rubber, and cold calendering is calendering using metal rolls.

The number of rolling units 52 can be appropriately changed. If there are a plurality of them, there is an advantage that sufficient smoothing can be achieved even if the processing speed is high; on the other hand, if there is one, there is an advantage that it can be installed even if the space is narrow.

When two or more rolling units 52 are installed, they may be installed in parallel in the horizontal direction, up-down direction, or oblique direction, and may be arranged in combination of these installation directions. If they are installed in the horizontal direction, the processing speed can be increased due to the small embracing angle; if they are installed in the vertical direction, the installation space can be reduced. In addition, the wrapping angle mentioned here means the angle between the contacting sheets (a part of the circular arc of the section perpendicular to the axis) viewed from the center of the axis of the roller (the same applies hereinafter).

Papermaking can also be performed using the type of calendering, nip line pressure, number of nips, etc. among the calendering treatment conditions as control factors, and these control factors are preferably appropriately changed according to the required quality of tissue paper, that is, paper thickness and surface properties.

Moreover, the installation position of the calendering unit 52 is not particularly limited, and it can be selected at the rear stage of the lamination unit 51 and at the front stage of the chemical spray unit 53, or at the rear stage of the chemical spray unit 53 and at the contact embossing unit 54. front section.

(contact embossing unit)

In the manufacturing facility X1 of the secondary paper roll for tissue paper products, a contact embossing unit 54 for imparting contact embossing to the laminated continuous paper S2 may be provided.

Here, as shown in FIG. 13 , the contact embossing unit 54 has a structure as follows: a support roll 54B that is a metal roll or an elastic roll, and a metal hard roller 54A (corro) that has a fine protrusion 54C on the surface. The outer peripheral surfaces are provided so as to be rotatable while contacting each other with a predetermined pressure. In addition, with respect to the part corresponding to the width direction center of the tissue paper product in the stacked continuous paper S2, there are two convex parts 54C on the left and right, and the stacked continuous paper S2 is sandwiched between the convex parts 54C and the backup roller 54B. By conveying, the linear contact embossing CE for preventing delamination is applied to the laminated continuous paper S2 along the continuous direction of the laminated continuous paper S2.

Further, the winding unit 56 winds the stacked continuous paper S2 with the surface facing the roller 54A on which the contact embossing CE is applied being the outer peripheral side.

By providing the contact embossing CE in this way, delamination of the laminated continuous paper S2 in which a plurality of primary continuous papers are laminated (S11, S12 in the illustrated example) is prevented. Furthermore, it is preferable that the contact embossing CE is formed on both sides in the width direction of the tissue paper product so that delamination is less likely to occur at the end of the tissue paper product.

Moreover, the installation position of the contact embossing unit 54 is not particularly limited, and it can be selected at the rear stage of the chemical solution application unit 53 and at the front stage of the slitting unit 55, or at the rear stage of the calender unit 52 and at the front stage of the chemical solution application unit. Front section of 53. That is, any position may be used as long as it is in the rear stage of the rolling unit 52 and in the front stage of the slitting unit 55 .

In the case of providing contact embossing CE by the contact embossing unit 54, it is also proposed to apply the contact embossing CE within 0.3 to 2.5 seconds, preferably within 0.3 to 1.0 seconds, after applying the chemical solution to the laminated continuous paper S2. If it is less than 0.3 seconds, the chemical solution is not sufficiently absorbed by the base paper, and the chemical solution adheres to the backup roller 54B and the roller 54A to break the paper, or dirt adheres to the backup roller 54B and the roller 54A. When the time exceeds 2.5 seconds, the laminated continuous paper S2 to which the chemical solution has been applied is completely stretched, so wrinkles are less likely to occur in the subsequent process, and it is difficult to obtain a bulky tissue paper product. In addition, when the stacked continuous paper S2 is completely stretched, the stretch corresponding to the drag fluctuation disappears, and moisture absorption and water absorption lower the tensile strength, so that the paper is easily broken and the handleability is lowered.

In addition, in this bonding step, in this embodiment, the metal hard roller 54A having the fine protrusions 54C on the surface is used as the roller, but it is only necessary to form a linear shape to prevent delamination of the laminated continuous paper S2. For example, instead of using the roller 54A, a roller having fine needle-like members on the surface may be used as the roller.

Further, as the unit for joining, it is not limited to the above-mentioned examples, and devices whose terminal shapes of convex parts are dot-shaped, square, rectangular, circular, oval, etc. can also be used as rollers, and convex parts can also be used. The end shape of the device is a long and thin line, a thin line extending obliquely, etc. as a roller.

In addition, the arrangement of the protrusions can be considered at equal intervals, but it can also be zigzag or not at equal intervals. In addition to arranging the protrusions in one row to continuously provide contact embossing, it is also conceivable to arrange multiple rows of two or more rows. Convex. In addition, in order to provide a plurality of rows of contact embossing densely, a plurality of groups in which protrusions are arranged may be arranged to provide a plurality of contact embossing groups. In addition, as the bonding step, in addition to bonding by applying pressure mechanically as described above, bonding may also be carried out by other means such as ultrasonic waves.

(medicine spray unit)

In the production of the secondary paper roll for tissue paper products according to this embodiment, the chemical solution is applied to the laminated continuous paper S2 simultaneously with spraying.

The chemical solution spray unit 53 is not particularly limited, but a spin-wetting spray system may be used in addition to the nozzle spray system.

Among them, as the form of the spraying nozzle in the nozzle-type spraying device, a hollow conical nozzle that sprays spray in a ring shape, a solid conical nozzle that sprays spray in a circle, and a spray nozzle that sprays spray in a square shape are listed. Solid pyramid, solid rectangular nozzles, fan-shaped nozzles, etc., can be properly selected to use nozzle diameter, nozzle number, nozzle arrangement, nozzle configuration number or spray distance, spray pressure, spray angle and spray liquid concentration, viscosity, etc. Spray chemical spray evenly across the width of the paper.

In addition, in the nozzle-type spraying device, as for the method of atomization, it is possible to select and use two methods, the one-fluid method or the two-fluid method. Among them, the one-fluid spraying method is such a method: using pressurized air to directly apply pressure to the sprayed chemical liquid to spray droplets from the nozzle, or to suck air into the nozzle from a small hole opened on the side of the nozzle near the outlet. to spray droplets. In addition, the two-fluid spray method includes the following methods: internal mixing type in which pressurized air is mixed with sprayed liquid inside the nozzle and atomized; pressurized air and sprayed liquid are mixed and atomized outside the nozzle The external mixing type; and the collision type that makes the micro-atomized droplet particles collide with each other to further homogenize and micronize the droplet particles, etc.

On the other hand, regarding the spin-wetting coating device, it is a device that sends the sprayed liquid to a high-speed rotating disc, and the liquid is atomized by the centrifugal force of the disc. The spin-wetting coating device changes The rotation speed of the disc is used to control the diameter of the droplet particles, and the amount of sprayed liquid (delivered amount) is controlled by changing the amount of liquid sent to the disc. The spin-wet coating device has the following advantages: It can suppress the scattering of mist for a small amount of spray liquid, and can evenly coat the surface of the pigment-coated paper, and it is easy to adjust the spray speed and mist particle diameter.

In order to uniformly spray and apply the chemical solution to the surface of the paper, it is preferable that the atomized chemical solution has a droplet particle diameter as small as possible. However, if the mist droplets are too fine, the mist droplets will be washed away by the rebound of the air after spraying and the air accompanying the surface of the paper, and it is difficult for the mist droplets to adhere to the paper surface. Therefore, in the spraying mode, in addition to properly adjusting the spraying distance, spraying pressure, spraying angle, and spraying speed, in the two-fluid mode, the mixing ratio of the sprayed drug solution and pressurized air, as well as the concentration and concentration of the drug solution can be adjusted appropriately. Viscosity, etc., adjusted to the particle diameter suitable for the given conditions. In addition, when the influence of accompanying air is large during spraying, it is also possible to add a suction device or a baffle plate (rectification plate) for removing the accompanying air. And a charged electrode (electrostatic spray method), etc., the charged electrode applies a high voltage to the end of the spray nozzle to charge the droplets, thereby improving the adhesion of the droplets to the pigment-coated paper.

The mist particles that are not coated on the paper surface but float as mist can be sucked and recovered to be sprayed again.

FIG. 12 shows an example of a chemical solution spraying device 53A ( 53B ) of a nozzle type spraying system, particularly a two-fluid system. This device 53A is a device in which a liquid medicine passage 53a is formed at the center and an air passage 53b is formed around it, and the medicine liquid sprayed from the end of the liquid medicine passage 53a is finely mist by the air discharged from the air passage 53b. Thus, the device 53A sprays the chemical liquid spray in a substantially conical shape. Reference numeral 53c is an external protective case, which protects the nozzle from paper dust and the like, and can also clean the nozzle by means of the air passing through the clean air passage 53d when necessary. Such chemical solution spraying devices 53A ( 53B) can be installed at one or more intervals in the paper width direction.

The mist droplets are washed away by the rebound of the sprayed chemical liquid as described above or the air accompanying the paper surface, and especially when the paper travels at a high speed, the mist droplets are less likely to adhere to the paper surface. Therefore, if necessary, as shown in FIG. 14 , from the periphery of the liquid medicine spray unit (spray nozzle) 53 of the one-fluid method or the two-fluid method, the air blown from the air supply path 53f formed in the casing 53e is used to surround the The chemical liquid is sprayed from the chemical liquid spray unit (spray nozzle), so that the chemical liquid can be appropriately applied to the sheet S2.

FIG. 15 shows an example of a spin-wet coating device 53X. This is a device in which a rotary rotor 53o is provided in a covered storage chamber 53p provided as necessary, and the chemical solution is sprayed onto the paper S2 from the discharge port 53q of the rotary rotor 53o.

However, the units arranged before and after the chemical spray unit 53 (the rolling unit 52 and the contact embossing unit 54 in the example of FIG. 11 ) are preferably arranged close to each other. Thus, when manufacturing a tissue paper product to which a chemical solution is not applied, only the laminated continuous paper S2 is directly conveyed from the front stage of the chemical solution spray unit 53 to the rear stage, and the laminated continuous paper S2 is passed without passing through the chemical solution spray unit 53. That is, it is possible to easily switch whether or not to apply the chemical solution. For example, in the manufacturing facility X1 of the secondary paper roll for tissue paper products shown in FIG. The continuous paper S2 is directly conveyed from the calender unit 52 to the contact embossing unit 54 , and the stacked continuous paper S2 may be circulated without passing through the chemical spray unit 53 .

When the chemical solution is applied to both sides of the laminated continuous paper S2, the total amount of the chemical solution applied to both sides is 1.5 to 5.0 g/m ² , preferably 2.0 to 4.5 g/m ² , more preferably 2.5 to 4.0 g/m 2 . m ² . If it exceeds 5.0g/m ² , the paper will break due to the reduction of paper strength or elongation, or the winding deviation will occur when winding with the winding cylinder, and the quality will also be too sticky. feel. If it is less than 1.5 g/m ² , the quality difference from the non-imparted product, such as a smooth feeling or a wet feeling, cannot be felt.

And when there is a difference in the amount of application to the two application surfaces, the two application surfaces are in contact with each other during the time (more than 8 hours) from when the spray is applied and stored with a laminated paper roll (プライ original reverse) until the folding process. Therefore, the amount of liquid medicine of the two will gradually equalize, and the difference between the surface and the back will become smaller.

When the chemical solution is applied to only one side of the laminated continuous paper S2, the chemical solution application surface is applied to the surface of the laminated continuous paper S2 that is located outside the secondary paper roll R (the surface on the primary continuous paper S11 side). That's it. In this way, although there is a difference between the surface and the back of the product, winding misalignment is less likely to occur. In this case, the application amount is 1.5 to 5.0 g/m ² , preferably 2.0 to 4.5 g/m ² , more preferably 2.5 to 4.0 g/m ² .

It is also proposed that, when there are differences in the crepe ratios of the respective primary continuous papers constituting the stacked continuous paper S2, the side of the primary continuous paper with a high crepe ratio (the side of the primary continuous paper S11 in the illustrated example) is given more liquid medicine. For example, in the example shown in FIG. 11 and FIG. 20, among the two chemical solution spray units 53, the chemical solution spray unit 53B that directly applies the chemical solution to the continuous sheet S11 at one time is more effective than the other chemical solution spray unit 53A. Too much medicine. In this case, the ratio of the amounts of chemical solutions applied to both sides is 100:0 to 60:40, preferably 75:25 to 60:40.

FIG. 20(A) is a cross-sectional view (a cross-sectional view cut parallel to the MD direction) of the laminated continuous paper S2 stacked in two layers before application of the chemical solution. When the chemical solution is applied to both sides of the laminated continuous paper S2 stacked in two layers, there is a difference in the amount of the chemical solution on both sides, and in the figure, the application of the chemical solution is more on the primary continuous paper S11 side. After the application of the chemical solution, before the laminated continuous paper S2 is completely stretched, the laminates are integrated by contact embossing CE, and cut into product widths by the slitting unit 55 ( FIG. 20(B) ). Thereafter, the stacked continuous paper S2 is wound up by the winding unit 56 and left to stand for permeation of the chemical solution. The primary continuous papers S11 and S12 constituting the stacked continuous paper S2 to which the chemical solution is applied by the chemical solution spray unit 53 are mainly elongated in the MD direction. At this time, the elongation rate of the primary continuous paper S11 with more chemical solution is greater than that of the other primary continuous paper S12. The surface of the many primary continuous paper S11 is wrinkled (FIG. 20(C)). If there is also a difference in the crepe ratio of the stacked continuous paper S2 to be stacked, and the base paper with a high crepe ratio is used for the primary continuous paper S11, the elongation of the primary continuous paper S11 and the elongation of the primary continuous paper S12 can be made different. Bigger difference.

In the example of FIG. 1 , after the base paper is dried by the Yankee dryer 115, the base paper is peeled off by the Yankee dryer 115 by the doctor blade 117, and crepes are formed by the difference between the dryer speed and the take-up speed. The shape of the wrinkle is adjusted by attaching a paper to the Yankee dryer 115, but since the sticking fluctuates slightly or the fiber material is not evenly distributed, the three-dimensional shape of the wrinkle slightly exists when observed from a microscopic field of view. There are fluctuations. This waviness (ばらつき) becomes more remarkable as the wrinkle rate is larger.

Along with the undulation of the wrinkle, the stretching when the chemical solution is applied also undulates, and this is formed in the form of three-dimensional fine ripples (波打ち). As for the waviness, the wrinkle is inconspicuous due to the tension applied when the paper roll is dried in the air, but becomes conspicuous after being processed and cut into a product by recovery. The more the amount of liquid medicine on the paper, the larger the crepes, the change of the shape of the crepes, and the greater the corrugation of the paper; on the contrary, the less the amount of liquid medicine on the paper, the smaller the crepes, and the greater the crepe shape. changes, the smaller the waviness of the paper. Therefore, it is possible to improve the fluffy (swelling) effect by changing not only the amount provided but also the wrinkle rate.

In addition, regarding the quality, when the primary continuous papers S11 and S12 having different crepe ratios are laminated to form a product, if the chemical solution is not applied, the volume feeling (bulk feeling) on both sides of the tissue paper as the product will be different ( Figure 21(A)). However, although the primary continuous paper S11 can be stretched at a higher elongation rate than the primary continuous paper S12 by applying more chemical solution to the primary continuous paper S11 with larger surface irregularities (high wrinkle rate), However, since it is fixed parallel to the MD direction by contact embossing (not shown), the primary continuous sheet S11 is wavier and the volume (thickness) of the laminated sheets increases. (Fig. 21(B)).

When there is a difference in the amount of the chemical solution applied, although there is a concern that the touch and feel of the product will be different on both sides of the product, by making the secondary paper roll R in the state of a paper roll before supplying it to the subsequent process (folding processing, etc.) After standing still, the surfaces of the primary continuous papers S11 and S12 with different amounts of chemical solution applied are held in a state facing each other (medicine solution permeation process, FIG. Arrows), the difference gradually decreases during drying. In addition, hollow arrows in FIG. 22 indicate the direction of penetration of the liquid medicine components.

(liquid medicine)

The chemical solution to be applied has a viscosity of 1 to 700 mPa·s at 40° C. from the viewpoint of high-speed processing. More preferably, it is 50 to 400 mPa·s (40° C.). If it is less than 1 mPa·s, the chemical solution is likely to scatter on rollers such as anilox rollers, brush rollers, and gravure rollers; otherwise, if it is greater than 700 mPa·s, it is difficult to control the application amount on each roller or continuous paper. As for the ingredients, it contains 70-90% of polyols, 1-15% of water, and 0.01-22% of functional medicines.

Polyols include: glycerin, diglycerin, propylene glycol, 1,3-butanediol, polyethylene glycol, and their derivatives; sorbitol, glucose, xylitol, maltose, maltitol, mannitol, Sugars such as trehalose.

As functional agents, there are softeners, surfactants, inorganic and organic fine particle powders, oily ingredients, and the like. Softeners and surfactants have the effect of imparting softness to tissue paper and smoothing the surface. Anionic surfactants, cationic surfactants, and zwitterionic surfactants are suitable for use as surfactants. Inorganic and organic microparticle powders make the surface smooth to the touch. The oily component has an effect of improving slipperiness, and higher alcohols such as liquid paraffin, cetyl alcohol, stearyl alcohol, and oleyl alcohol can be used.

In addition, as a functional drug, hydrophilic polymer gelling agent, collagen, hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk protein, hyaluronic acid or its salt, ceramide, etc. may be added in any combination. One or more kinds of humectants serve as agents for assisting and maintaining the moisture retention of the polyol.

In addition, as functional agents, fragrances, lubricants such as various natural extracts (Emoriento), vitamins, emulsifiers for stabilizing ingredients, and agents for suppressing foaming of liquid medicines and imparting stable detoxification can be appropriately blended. Foaming agent, antifungal agent, organic acid and other deodorants. Furthermore, antioxidants, such as vitamin C and vitamin E, may be contained.

From the viewpoint of stabilizing the viscosity and amount of the chemical solution, among the above-mentioned components, polyhydric alcohols such as glycerin and propylene glycol are preferably used as the main component.

The temperature at the time of applying the chemical solution is preferably 30°C to 60°C, preferably 35°C to 55°C.

(continuous paper at one time)

The raw material pulp of the primary continuous paper S11 and S12 is not particularly limited, and an appropriate raw material pulp can be selected according to the application of the tissue paper product. As raw material pulp, for example, wood pulp, non-wood pulp, synthetic pulp, old paper pulp, etc., more specifically, groundwood pulp (GP), stone ground wood pulp (SGP), wood chip pulp, etc. Wood pulp (RGP), pressurized groundwood pulp (PGW), preheated wood chip groundwood pulp (TMP), chemical thermomechanical pulp (CTMP), bleached chemical thermomechanical pulp (BCTMP) and other mechanical pulp (MP) ; Chemical mechanical pulp (CGP), semi-chemical pulp (SCP), broadleaf bleached kraft pulp (LBKP), conifer bleached kraft pulp (NBKP) and other kraft pulp (KP), soda pulp (AP) , sulfite pulp (SP), dissolving pulp (DP) and other chemical pulp (CP); synthetic pulp made of nylon, rayon, polyester, polyvinyl alcohol (PVA), etc.; deinked pulp (DIP), Waste paper pulp (WP) and other old paper pulp, tail pulp (TP); rag pulp made of cotton, flax, hemp, jute, Manila hemp, ramie, etc.; grass pulp, stipa pulp, bagasse pulp, bamboo pulp Among the stem pulps such as pulp and kenaf pulp, and auxiliary pulps such as bast pulp, one or more of them are appropriately selected and used.

In particular, the raw material pulp is preferably pulp in which NBKP and LBKP are blended. It is also possible to properly mix old paper pulp, but in terms of hand feeling, it can also be composed of only NBKP and LBKP. As a mixing ratio in this case (JIS P 8120), NBKP:LBKP=20:80～80:20 is suitable , particularly preferably NBKP:LBKP=30:70 to 60:40.

The primary continuous paper S11 and S12 have a paper weight according to JIS P 8124 of 10 to 25 g/m ² , preferably 12 to 20 g/m ² , more preferably 13 to 16 g/m ² . If the paper weight is less than 10 g/m ² , it is preferable in terms of flexibility, but appropriate strength cannot be ensured. In addition, if the paper weight exceeds 25 g/m ² , it will be too hard and the touch will be poor.

In addition, the paper thickness (measured with a peacock thickness gauge manufactured by Ozaki Seisakusho) is 80 to 250 μm per layer, preferably 100 to 200 μm, more preferably 130 to 180 μm.

The crepe ratio of the primary continuous paper sheets S11 and S12 is preferably 10% to 30%, more preferably 12% to 25%, and particularly preferably 13% to 20%. If the crepe rate is less than 10%, the paper is likely to be broken during processing, and the elongation of the tissue paper product is small and has no toughness (koshi). On the other hand, if the crepe rate exceeds 30%, it will be difficult to control the tension of the paper during processing, which will easily cause paper breakage, and the tissue paper products will be wrinkled after manufacture, and the aesthetics will be poor.

Here, the wrinkle rate is represented by the following formula.

Creping rate: {(peripheral speed of dryer during paper making) - (peripheral speed of reel)}/(peripheral speed of dryer during paper making)×100

The dry tensile strength specified in JIS P 8113 of primary continuous paper S11 and S12 (hereinafter also referred to as dry paper strength) is 200 to 700 cN/25mm in the longitudinal direction, preferably 250 to 600 cN/25mm, especially It is preferably 300 to 600 cN/25mm, and 100 to 300 cN/25mm in two layers in the lateral direction, preferably 130 to 270 cN/25mm, particularly preferably 150 to 250 cN/25mm. If the dry tensile strength of the base paper is too low, problems such as paper breakage or elongation are likely to occur during manufacture and use; if it is too high, the touch feeling during use will be rough.

These paper strengths (paper strength) can be adjusted by known methods. For example, the following methods can be appropriately combined: internally added dry paper strength enhancer (at the stage before the dryer section, for example, added to the pulp slurry Medium); reduce the freeness of pulp (for example, reduce by about 30-40ml); increase the mixing ratio of NBKP (for example, reach more than 50%), etc.

As the dry paper strength agent, starch, polyacrylamide, CMC (carboxymethyl cellulose) or its salts such as sodium carboxymethyl cellulose, calcium carboxymethyl cellulose, zinc carboxymethyl cellulose, etc. can be used. As the wet paper strength agent, polyamide polyamine epichlorohydrin resin, urea resin, acid colloid/melamine resin, thermal crosslinkability imparting PAM, etc. can be used. When adding a wet paper strength agent internally, the addition amount may be about 5 to 20 kg/t in terms of weight ratio with respect to the pulp slurry. Moreover, when internally adding a dry paper strength agent, the addition amount may be about 0.5-1.0 kg/t by weight ratio with respect to a pulp slurry.

Next, another aspect of the manufacturing facility and manufacturing method of the secondary paper roll for tissue paper products will be described.

[Manufacturing equipment and method of secondary paper roll for second tissue paper product]

For example, as shown in FIG. 16 , a tension control unit 57 for controlling the tension of the stacked continuous paper S2 may be provided between the chemical spray unit 53 and the contact embossing unit 54 . The tension control unit 57 is constituted by a cylindrical roller, and can move up and down according to the degree of deflection of the stacked continuous paper S2.

In addition, when the tension control unit 57 is provided as shown in FIG. 16 , it is also proposed to dispose the rolling unit 52 before the chemical spray unit 53 and after the tension control unit 57 . In this case, in the case of the calender unit 52 disposed after the tension control unit 52, it is also proposed that the calender roller 52A be separated from the back-up roller 52B by a distance equal to or greater than the paper thickness of the stacked continuous paper S2 when applying the chemical solution. The stacked continuous paper S2 is passed through without smoothing.

[Third Manufacturing Equipment and Manufacturing Method of Secondary Paper Roll for Tissue Paper Products]

As shown in FIG. 17 , the contact embossing unit 54 may also be provided between the rolling unit 52 and the chemical solution spraying unit 53 . The manufacturing method of the secondary paper roll for tissue paper products using the manufacturing apparatus X3 of the secondary paper roll for tissue paper products is as follows.

As shown in FIG. 17 , in the method for manufacturing a secondary paper roll for tissue paper products according to this embodiment, the primary continuous paper (S11, S12 in the illustrated example) drawn from a plurality of primary paper rolls is moved along the Laminate along its continuous direction to make laminated continuous paper S2 (lamination process); use a pair of calender units 52 to smooth the laminated continuous paper S2 (smoothing process); utilize contact embossing unit 54 to smoothen The final laminated continuous paper S2 is provided with contact embossing (contact embossing process); the laminated continuous paper S2 provided with contact embossing is provided with a chemical solution by using a pair of chemical spray units 53 (chemical solution imparting process); 55 Slitting the stacked continuous paper S2, and cutting it into the product width of the tissue paper product or its multiple width (slitting process); Next, utilize the coiling unit 56 to slit the stacked continuous paper through the slitting process S2 performs coaxial winding to form a plurality of secondary paper rolls R of the product width of the tissue paper product or multiples thereof.

In addition, in the case of manufacturing a tissue paper product to which a chemical solution is not applied by using the manufacturing facility X3 of a secondary paper roll for tissue paper products, as shown by a two-dot chain line in FIG. The embossing unit 54 is directly conveyed to the slitting unit 55 , and the stacked continuous paper S2 may be circulated without passing through the chemical spray unit 53 .

[Fourth Manufacturing Equipment and Manufacturing Method of Secondary Paper Roll for Tissue Paper Products]

As shown in FIG. 18 , regarding the chemical solution imparting step 53, the contact embossing unit 54 may be provided between the lamination unit 51 and the calender unit 52, and the calender unit 52 may be provided between the chemical spray unit 53 and the contact pressure unit 52 as a section. Between the grain units 54. The manufacturing method of the secondary paper roll for tissue paper products using the manufacturing apparatus X4 of the secondary paper roll for tissue paper products is as follows.

As shown in FIG. 18 , in the method for manufacturing a secondary paper roll for tissue paper products according to this embodiment, the primary continuous paper (S11, S12 in the illustrated example) drawn out from a plurality of primary paper rolls is moved along the stacking unit 51. It is laminated along its continuous direction to make laminated continuous paper S2 (lamination process); for this laminated continuous paper S2, a pair of chemical solution spraying units 53 arranged side by side in the up and down direction is used to apply the chemical solution (medicine solution application process); The calendering unit 52 performs a smoothing process (smoothing process); utilizes the contact embossing unit 54 to impart contact embossing (contact embossing process) to the laminated continuous paper S2 after the smoothing process; utilizes the slitting unit 55 to laminate the continuous paper S2 Carry out slitting, and cut into the product width of the tissue paper product or its multiple width (slitting process); Next, use the coiling unit 56 to coaxially wind the stacked continuous paper S2 slit by the slitting process , forming a plurality of secondary paper rolls R of the product width of the tissue paper product or multiples thereof.

In addition, in the case of manufacturing a tissue paper product to which a chemical solution is not applied by using the manufacturing facility X4 of a secondary paper roll for tissue paper products, as shown by a two-dot chain line in FIG. The unit 52 is conveyed to the contact embossing unit 54 , and the stacked continuous paper S2 may be circulated without passing through the chemical spray unit 53 .

[Fifth Manufacturing Equipment and Manufacturing Method of Secondary Paper Roll for Tissue Paper Products]

As shown in FIG. 19 , a pair of rolling units 52 may be arranged vertically, and a pair of chemical spray units 53 may be arranged vertically. The manufacturing method of the secondary paper roll for tissue paper products using the manufacturing apparatus X4 of the secondary paper roll for tissue paper products is as follows.

As shown in FIG. 19 , in the manufacturing method of the secondary paper roll for tissue paper products according to this embodiment, the primary continuous paper (S11, S12 in the illustrated example) drawn out from a plurality of primary paper rolls is moved along the stacking unit 51 Laminate along its continuous direction to make laminated continuous paper S2 (lamination process); utilize a pair of calender units 52 to smoothen the laminated continuous paper S2 (smoothing process); utilize a pair of chemical spray units 53 to laminate Applying chemical solution to the continuous paper S2 (chemical solution applying process); applying contact embossing to the laminated continuous paper S2 by the contact embossing unit 54 (contact embossing process); using the slitter unit 55 to slit the laminated continuous paper S2, and Cut into the product width of the tissue paper product or its multiple width (slitting process); Next, use the winding unit 56 to coaxially wind the stacked continuous paper S2 slit in the slitting process to form a tissue paper A plurality of secondary paper rolls R of the product width of the product or multiples thereof.

In addition, in the case of manufacturing a tissue paper product to which a chemical solution is not applied by using the manufacturing facility X5 of a secondary paper roll for tissue paper products, as shown by a two-dot chain line in FIG. The unit 52 is directly conveyed to the contact embossing unit 54 so that the stacked continuous paper S2 can be circulated without passing through the chemical spray unit 53 .

Example

Next, using the secondary paper roll manufactured by the manufacturing method of the secondary paper roll X1 for tissue paper products shown in FIG. A reference example and a comparative example of the flexographic transfer method are compared.

<base paper>

In Examples 1 to 6, NBKP was 30% and LBKP was 70% in the pulp constituting the base paper. In addition, pulp with a creping ratio of 19% was used. Regarding Examples 1 to 6, a chemical solution having the same components as those in Comparative Example 2 was prepared so that the viscosity thereof was 110 mPa·s (40° C.).

Examples 1 to 3 used the spray form of the rotary wetting method shown in FIG. 15 , and Examples 4 to 6 used the spray form of the nozzle method shown in FIG. 12 .

The comparative examples in Table 2 are all products sold on the market. Comparative example 1 is a non-moisturizing general-purpose tissue paper sold by the applicant on the market, and comparative examples 2~ are moisturizing lotion-type tissue paper. Comparative Example 2 is a lotion-type tissue paper sold by the applicant on the market, while Comparative Examples 3 and 4 are products sold by other companies on the market, and the content is unknown.

Each parameter shown in Table 1 and Table 2 is as follows.

Paper weight per square meter (paper weight): Measured based on JIS P 8124 (1998). In the case of a 2-ply tissue paper product, the average paper weight per square meter of the 2-ply paper is described.

Paper thickness: Measured under the conditions of JIS P 8111 (1998), using a disc-type thickness gauge (thickness measuring device) "PEACOCK G type" (manufactured by Ozaki Seisakusho). Specifically, after confirming that there is no dirt, dust, etc. between the plunger and the measuring table, the plunger is placed on the measuring table, the memory of the disk-type thickness gauge is moved to align the zero point, and then the plunger is lifted. Place the sample on the test bench, lower the plunger slowly and read the reading (gauge) at this time. At this time, only the plunger is placed. The terminal of the plunger is made of metal, and the diameter of the circular plane is 10 mm. This plane is perpendicular to the plane of the paper, and the load at the time of measuring the thickness of the paper is about 70 gf. In addition, the paper thickness is an average value obtained by measuring 10 times.

Product density: The density of the product is the value (C) of twice the paper weight per square meter of the tissue paper product after conditioning under the conditions of JIS P 8111 divided by the tissue paper obtained by using "PEACOCK G type" (2 The value obtained from the paper thickness (D) of layer), the unit is g/cm ³ , and there are 3 digits after the decimal point.

Dry tensile strength: Measured based on the tensile test method of JIS P 8113 (1998).

Wet tensile strength: Measured based on JIS P 8135 (1998).

Elongation: Measured using "Universal Tensile Compression Tester TG-200N" manufactured by Minebea Co., Ltd.

Softness: Measured based on the hand touch tester method based on JIS L1096 E method. However, the test piece was carried out under the condition that the size of the test piece was 100 mm×100 mm and the gap was 5 mm. The measurement was performed five times each in the longitudinal direction and the transverse direction of one layer, and the average value of the total 10 times was rounded off to one decimal place and expressed in units of cN/100mm.

Static friction coefficient: Measured by the following method based on JIS P 8147 (1998). The tissue paper peeled off into one layer was pasted on an acrylic board so that the paper surface was the outer side. The 2-ply tissue paper was wound directly onto a 100 g weight and placed on top of the tissue paper on an acrylic plate. Tilt the acrylic plate and measure the angle at which the weight slides down. The angle measurement was carried out 4 times each in the vertical direction and the horizontal direction, and was carried out 8 times in total. The average angle was calculated, and the tangent value thereof was used as the coefficient of static friction.

MMD: is the mean deviation MMD of the coefficient of static friction. MMD is one of the indicators of smoothness, the smaller the value, the smoother, and the larger the value, the worse the smoothness. Furthermore, as a method of measuring the MMD value, as shown in FIG. 23( a ), the contact surface of the friction member 212 is given a contact pressure of 25 g and a pressure of 20 g in a predetermined direction (right obliquely downward in FIG. 23( a )). The surface of the tissue paper 211 serving as a measurement sample of tension per cm is in contact with the surface, and moves at a speed of 0.1 cm/s for 2 cm in substantially the same direction as the direction in which the tension is applied. At this time, the coefficient of friction was measured using a friction coefficient tester (Friction Sensitivity Tester) KES-SE (manufactured by Kato Tech Co., Ltd.), and the value obtained by dividing the friction coefficient by the friction distance (moving distance = 2 cm) as the MMD value. Further, the friction member 212 is configured by adjoining 20 piano wires P having a diameter of 0.5 mm, and has a contact surface formed to have a length and a width of 10 mm. A unit bulge formed at the end by 20 piano wires P (with a radius of curvature of 0.25 mm) was formed on the contact surface. Furthermore, FIG. 23( a ) schematically shows the friction member 212 , and FIG. 23( b ) shows an enlarged view of a portion surrounded by a dashed-dotted line in FIG. 23( a ).

Moisture content: Measured based on JIS P 8111 (1998).

Chemical solution content: The chemical solution applied amount indicates the content of the chemical solution component in the dry state (absolutely dry) contained in the unit area of the tissue paper in the standard state of JIS P 8111. Specifically, it indicates the applied chemical solution The oil content of ingredients other than moisture in the product. The unit area of the tissue paper refers to the area of the stacked sheets viewed from a certain viewpoint on a line perpendicular to the plane, and does not mean the total area of the stacked sheets and their front and back sides.

Chemical solution content rate: The chemical solution imparting rate is the denominator (A) (g) of the predetermined mass of tissue paper products adjusted to humidity under the conditions of JIS P 8111, and the chemical solution contained in the predetermined mass of tissue paper products The mass (B) (g) in which water is removed is used as a numerator, and the ratio of (B) divided by (A) is expressed in (%). (Concentration rate of liquid medicine %)=(B)÷(A)×100(%)

Sensory Evaluation: Regarding Examples 1 to 6, Reference Examples 1 and 3, and Comparative Examples 1 and 2, 87 consumers were tested for softness, smoothness, thickness, and moistness based on the following criteria sensory evaluation. In addition, regarding Comparative Examples 3 and 4, sensory evaluations were performed on another 12 persons at different times and dates.

In addition, regarding the evaluation criteria, the grades of the non-moisturizing general-purpose tissue paper (Comparative Example 1) to which no chemical solution was applied were all set as "3", those that felt "very good" were set as "5", and those that felt "good" Those who feel "equal to the standard" are rated "3", those who feel "bad" are rated "2", and those who feel "very poor" are rated "1". In addition, the chemical solution-applied tissue paper was also evaluated for the presence or absence of a sticky feeling, and the evaluation criteria were "O" for "little sticky feeling" and "X" for "significant sticky feeling".

Table 1

[Table 2]

From the results in Table 1 and Table 2, it can be seen that using the secondary paper roll manufactured by the method for manufacturing a secondary paper roll for tissue paper products according to the present invention, the chemical solution-containing paper produced by the above-mentioned multi-stand type intermediate folder Tissue paper products have a high ratio of paper thickness to paper weight per square meter (2P: 2 layers), and in sensory evaluation, especially "thickness" is highly evaluated.

In addition, although it is not described in the table, in any of Examples 1 to 5, at the manufacturing site, compared with the flexographic method of Reference Examples 1 to 3 and the gravure transfer method of Comparative Example 2, it can be seen that the paper powder It is rarely produced and can be produced stably.

As is clear from the foregoing description, this specification and the accompanying drawings also disclose the following inventions.

[Invention A]

A manufacturing device for a secondary paper roll for tissue paper products, which is a manufacturing device for continuously manufacturing a plurality of secondary paper rolls for tissue paper products from a primary paper roll, the manufacturing device is characterized in that it has:

a stacking unit, which is used to stack the primary continuous paper drawn from multiple primary paper rolls along its continuous direction to make stacked continuous paper;

A liquid medicine spray unit, which is used to give the liquid medicine to the laminated continuous paper in a spray state;

a slitting unit for slitting the stacked continuous paper into the product width or multiples thereof of the tissue paper product; and

The coiling unit coaxially coils each laminated continuous paper after slitting to form a plurality of secondary paper rolls of the product width of the tissue paper product or multiple widths thereof.

[Invention B]

In the manufacturing apparatus of a secondary paper roll for tissue paper products according to Invention A, the chemical solution spray unit operates after the stacking unit and before the slitting unit.

[Invention C]

In the manufacturing apparatus of the secondary paper roll for tissue paper products according to the invention B, there is a smoothing step of performing a smoothing treatment with a calender between the laminating unit and the chemical solution spraying unit.

[Invention D]

In the manufacturing apparatus of the secondary paper roll for tissue paper products according to Invention B, there is a contact embossing unit between the chemical solution spraying step and the slitting step, and the contact embossing unit is used for The laminated continuous paper is provided with linear contact embossing to prevent delamination between layers.

[Invention E]

In the manufacturing apparatus of the secondary paper roll for tissue paper products according to Invention A, the application of the chemical solution is performed by a nozzle spray method.

[Invention F]

In the manufacturing apparatus of a secondary paper roll for tissue paper products according to claim 1, the application of the chemical solution is performed by a spin-wetting spray method.

[Invention G]

A manufacturing device of tissue paper products, characterized in that a plurality of said secondary paper rolls obtained by any one of the above-mentioned inventions are prepared, and they are arranged in a multi-stand type middle folder along the production line direction, and the A plurality of secondary continuous sheets drawn from each secondary paper roll are conveyed in their continuous direction, and stacked while being folded during the conveyance, and then a predetermined number of stacked sheets are cut at a predetermined length to form tissue paper stack, and store the stack of tissue paper in the storage box.

Industrial Applicability

The present invention is applicable to the manufacture of secondary paper rolls for tissue paper products used in multi-stand intermediate folders.

Label description

51...Stacking process (stacking unit)

52...Rolling unit (smoothing process)

53...Chemical solution spraying unit (medicine solution application process)

54...Contact embossing unit (contact embossing process)

55...Slitting unit (slitting process)

56...Coiling unit (coiling process)

S11, S12...One time continuous paper

S2…Stacked continuous paper

JR…once roll

R…Secondary paper roll

Claims (7)

1. a thin-paged paper products is with the manufacturing approach of secondary paper roll, and its paper roll of serving as reasons is made the manufacturing approach of a plurality of secondary paper rolls that thin-paged paper products uses continuously, and this manufacturing approach is characterised in that it has following operation:

Range upon range of operation in this operation, will be carried out range upon range ofly from the one-time continuous paper that a plurality of paper roll are extracted out along its continuous direction, process range upon range of continuous form;

The medicine liquid spray operation in this operation, is given soup to range upon range of continuous form with atomize;

The rip cutting operation in this operation, is carried out rip cutting to range upon range of continuous form, makes its goods width that becomes thin-paged paper products or its many times of width; And

Coiling process in this operation, carries out coaxial batching to each the range upon range of continuous form after the rip cutting, forms the goods width of thin-paged paper products or a plurality of secondary paper rolls of its many times of width.

2. thin-paged paper products as claimed in claim 1 is with the manufacturing approach of secondary paper roll, wherein,

Said medicine liquid spray operation is carried out after said range upon range of operation and before said rip cutting operation.

3. thin-paged paper products as claimed in claim 2 is with the manufacturing approach of secondary paper roll, wherein,

Between said range upon range of operation and said medicine liquid spray operation, have and utilize calender to carry out the smoothing operation that smoothing is handled.

4. thin-paged paper products as claimed in claim 2 is with the manufacturing approach of secondary paper roll, wherein,

Between said medicine liquid spray operation and said rip cutting operation, have contact embossing operation, in this contact embossing operation, said range upon range of continuous form is applied the contact embossing of the wire that prevents splitting.

5. thin-paged paper products as claimed in claim 1 is with the manufacturing approach of secondary paper roll, wherein,

Giving through the nozzle-type spray pattern of said soup carried out.

6. thin-paged paper products as claimed in claim 1 is with the manufacturing approach of secondary paper roll, wherein,

Giving through rotating wetting spray pattern of said soup carried out.

7. the manufacturing approach of a thin-paged paper products is characterized in that,

Prepare a plurality of said secondary paper rolls that obtain through each claim in the aforesaid right requirement; They are disposed along the production line direction in the folding machine in the middle of multimachine seat formula; To carry along its continuous direction from a plurality of secondary continuous forms that each secondary paper roll is extracted out; And in its course of conveying, in folding, pile up, cut off the stacked paper of predetermined number with predetermined length afterwards and form tissue paper and pile up, this tissue paper is piled up be accommodated in the receiver.

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