JPH06207400A - Converted paper for printing and its production - Google Patents

Abstract

PURPOSE:To obtain the subject converted paper having both sufficient water absorptivity and water resistance, further toughness and weatherability by mixing particles having the water absorptivity with a hydrophilic binder, subjecting synthetic fiber paper to impregnation or coating conversion with the resultant mixture and then drying the prepared paper. CONSTITUTION:Particles having water absorptivity (e.g. a silica paste) are mixed with a hydrophilic binder (e.g. an aqueous acrylic resin binder) to prepare a mixture, which is then filled in a liquid tank 10 and synthetic fiber paper 5 (e.g. polyester fiber paper) drawn out of a rolled scroll is dipped therein to impregnate or coat the synthetic fiber paper 5 with the mixture 1. The resultant paper is then passed through a drying means 15, dried and wound to provide the objective printing converted paper 8 having both sufficient water absorptivity and water resistance, sufficient suitability for printing by an ink jet printing method and toughness and weather ability capable of withstanding the outdoor use and sufficient suitability for printing according to a heat transfer or toner method for dry copy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-resistant printing processed paper and a method for producing the same.

[0002]

2. Description of the Related Art In recent years, OA devices such as word processors, personal computers and copiers are becoming more integrated, and printed products from these OA devices have come to be accepted in the light printing market. . And now
Printing by OA equipment is in the age of colorization.

Examples of printing methods for these color prints include an ink jet method, a thermal transfer method, a dry copying toner method, and a silver salt method. Plain paper (paper that is not photographic paper) can be used for the three methods other than the silver salt method that can be used only on paper that has been subjected to photographic processing. Among the methods that can use plain paper, the inkjet method is attracting attention because of its low running cost, low printing sound, printing speed, and color clarity in the case of color, and it is the method expected in the future. is there.

The ink jet system is a printing system in which a water-based ink is ejected from a thin nozzle of a print head portion, and since it is necessary to instantaneously fix the ink ejected from the nozzle onto the paper, a highly water-absorbent paper using wood pulp. Is used. However, this highly water-absorbent paper is fragile and easily broken by water, which is peculiar to paper, and also causes fine wrinkling due to water absorption of ink, and the paper surface is stretched due to water absorption to cause misalignment of the ink deposition position. However, there is a problem that a beautiful color is disturbed and a color failure occurs. In the case of printing a color pattern, since ink is sprayed on the entire surface of the paper and absorbs a large amount of water, the problem of waviness on the surface of the paper and defective coloring is a problem that cannot be ignored from the viewpoint of expanding the use of the inkjet system. Furthermore, since the water-absorbent paper lacks water resistance, it is difficult to use an ink-jet printed product outdoors such as a poster or a signboard.

In addition to the suitability for printing by the ink jet system, if the suitability for printing by the thermal transfer system or the toner system of dry copy is not sufficient, the utility value as OA paper will be low. Other than this, it is not a printing problem, but conventionally, for outdoor signboards, etc., a method of cutting vinyl chloride weatherproof color cutting film and making letters and marks and pasting it is taken, as is well known. Since vinyl chloride is an environmental problem (chlorine gas is generated when burned and dioxin can also be generated), it is manufactured and sold in Europe.
Its use is banned, and it will be banned in the United States within four years. It is very useful that the processed paper of the present invention can solve the environmental problem in such an outdoor signboard.

[0006]

In view of the above circumstances, the present invention has sufficient water absorption and water resistance, is sufficiently suitable for printing by an ink jet system, and is weather resistant enough to be used outdoors. In addition, it has sufficient suitability for printing by thermal transfer method, dry copy, and toner method of laser printer, and in addition, provides a processed paper for printing that contributes to solving the environmental problems. It is an issue.

[0007]

The processed paper for printing according to the present invention (hereinafter simply referred to as "processed paper") is impregnated or coated with a mixture obtained by mixing water-absorbing particles and a hydrophilic binder. It is a processed paper obtained by processing a synthetic fiber paper. This processed paper comprises the manufacturing method of the present invention, that is, a processing means for impregnating or coating a mixture obtained by mixing particles having water absorbency and a hydrophilic binder, and a drying means installed in the latter stage of this processing means. Using a processing apparatus provided, by performing a step of impregnating or applying the mixture by the processing means, and then drying by the drying means, with respect to the synthetic fiber paper pulled out from the roll-shaped roll, The synthetic fiber paper can be easily obtained by impregnating or coating the mixture.

Examples of the synthetic fiber paper which is the base material (processing base paper) of the processed paper of the present invention include a non-woven fabric type synthetic fiber paper produced by a wet papermaking method using synthetic fibers. As the synthetic fibers, polyester fibers, polypropylene fibers, vinylon (PVA) fibers, rayon fibers, acrylic fibers and the like are used alone or in a mixed form. Specifically, for example, by using a wet paper machine mainly using polyester fibers having a thickness of 1.5 d (denier) or less, a sheet having a basis weight (weight per m ² ) of 40 to 200 g / m ² is used. In order to improve paper making, strength and smoothness, a thickness of 60 to 270μ was obtained by applying a thermal calendar at a temperature of 200 ° C or higher.
A polyester fiber wet non-woven fabric of about m is used as a processing base material (processing base paper).

The purpose of using the polyester fiber wet non-woven fabric is that it has good heat resistance, water resistance, dimensional stability and weather resistance, and that it is made of wet paper and has the characteristics of a paper and a film and a high level of uniform smoothness. The thing is to get things. In addition, polyester fiber does not require the mixing of an adhesive as the third component or other adhesive fibers, and has the advantage that 100% polyester fiber paper is possible and the characteristics of polyester can be fully utilized. Polyester fiber wet non-woven fabric is very suitable as a base material.

When the fiber diameter exceeds 1.5 denier, a problem occurs in the smoothness of the paper. Thickness is 60μ
This is because when the thickness is less than m, the stiffness of the paper tends to be weak, and inconveniences may occur in the ink deficiency, and when the thickness exceeds 270 μm, inconveniences may occur in the suitability for feeding. The impregnating mixture for synthetic fiber paper, which is the base material of the processed paper of the present invention, is a mixture of water-absorbing particles (water-absorbing particles) and a hydrophilic binder. It is made by impregnating the mixture of No. 1 and drying, and the coating process is made by applying the liquid mixture and drying.

Examples of the water-absorbent particles include inorganic particles such as attapulgite, white carbon, titanium oxide, calcium carbonate and silica gel, and organic particles such as ramie powder. The smaller the average particle diameter of the water-absorbing particles is, the more preferable it is 10 μm or less. It is preferable to use a paste or powder of silica gel or calcium carbonate and mix it with a binder.

As the hydrophilic binder, acrylic resin, epoxy resin, polyethylene / vinyl acetate copolymer, SBR (styrene / butadiene / latex), N
BR (nitro butadiene latex), urethane resin, glucomannan, etc. are mentioned. The adhered amount of the water-absorbent particles and the hydrophilic binder (after drying) on the processed paper of the present invention is usually in the following range.

Water-absorbing particles: 2 g / m ^{2 to} 25 g / m
² The amount of adhesion here is the net amount of adhesion powder after water or solvent is scattered even when silica gel or calcium carbonate in paste form is used. Hydrophilic ^{Binder: 2g / m 2 ~25g / m} 2 coating weight here is the binder material adhering amount of the net after drying.

When the amount of the water-absorbent particles attached is too small, the water absorption cannot be enhanced, and when the amount of the water-absorbent particles attached is too large, the binder cannot hold the particles exposed on the surface and the paper powder comes out to clog the nozzle. Inconvenience tends to occur. Further, if the amount of the hydrophilic binder attached is too small, it becomes difficult to retain the water-absorbing particles, and if the amount of the hydrophilic binder attached is too large, there is a tendency that water absorption is insufficient and the coloring property is deteriorated.

The ratio of the water-absorbent particles, the hydrophilic binder and the solvent (water, etc.) in the liquid mixture to be impregnated is 15 to 15% of the water-absorbent particles based on 100% by weight of the entire liquid mixture.
50% by weight, the hydrophilic binder is 30 to 80% by weight, and the solvent (water or the like) is 0 to 50% by weight. In the case of the processed paper of this invention, it may be used as it is,
A form in which tacking such as application of an adhesive sizing agent is applied to one surface is also useful. The application of the sizing agent may be performed on the entire surface on one side, or may be applied by a partial adhesive (striped shape). Since this processed paper has air permeability, it has an advantage that bubbles are unlikely to form between the adherend and the adherend, unlike the resin film.

The method for producing processed paper according to the present invention includes, for example,
Processing can be performed with the processing apparatus of FIGS. The processing apparatus of FIG. 1 is an impregnation type, and the processing apparatus of FIGS. 2 and 3 is a coating type. The processing apparatus of FIG. 1 includes a processing means for impregnating a mixture of water-absorbing particles and a hydrophilic binder, and a drying means provided at a subsequent stage of the processing means. That is, the processing apparatus is provided with the liquid tank 10 filled with the mixture 1 in which the water-absorbent particles and the hydrophilic binder are mixed, and the drying means 15 installed after the liquid tank 10. In this processing device, the synthetic fiber paper 5 is continuously drawn out from a roll wound in a roll shape, dipped in the liquid tank 10 and then dried while passing through the drying means 15 to become the processed paper 8 and roll shape again. To be wound up.

The processing apparatus shown in FIG. 2 is provided with a processing means for applying a mixture of particles having water absorbency and a hydrophilic binder, and a drying means provided after the processing means. That is, it is a processing apparatus including a liquid tank 10 filled with a mixture 1 formed by mixing water-absorbent particles and a hydrophilic binder and rolls 21 to 23, and a drying means 15 installed after the liquid tank 10. In this processing apparatus, the synthetic fiber paper 5 is continuously drawn from the roll wound into a roll and passed between the rolls 22 and 23, but the mixture 1 in the liquid tank 10 is attached to the roll 21. After being transferred to the roll 22, the roll 22,
It is applied to the synthetic fiber paper 5 passing through the space 23. Mixture 1
The synthetic fiber paper 5 coated with is dried while passing through the drying means 15 and becomes the processed paper 8 which is wound again into a roll shape.

The processing apparatus shown in FIG. 3 also includes a processing means for applying a mixture of particles having water absorbency and a hydrophilic binder, and a drying means installed after the processing means. That is, it is a processing apparatus that includes a liquid tank 11 containing a mixture 1 formed by mixing water-absorbent particles and a hydrophilic binder, a roll 25, and a drying means 15 installed after the liquid tank 11. In this processing apparatus, the synthetic fiber paper 5 is continuously drawn out from the roll wound into the roll 25 and passes through the roll 25.
The mixture 1 therein is applied to the synthetic fiber paper 5 through the clearance of the bevel blade 11a. Then, the synthetic fiber paper 5 coated with the mixture 1 is dried while passing through the drying means 15 to become the processed paper 8 and is again wound into a roll shape.

The impregnation process and coating process of the mixture are shown in FIGS.
It is not limited to once as shown in. The impregnation and application of the mixture may be performed in two or three layers. Of course, the impregnation or coating of the mixture other than the mixture may be performed before or after the impregnation or coating of the mixture. For example, as shown in FIG. 4, only the hydrophilic binder may be applied after the impregnation of the mixture.

The treatment apparatus shown in FIG. 4 is filled with a liquid tank 10 filled with a mixture 1 formed by mixing water-absorbing particles and a hydrophilic binder, and a coating material 2 containing only a hydrophilic binder containing no water-absorbing particles. With the liquid tank 13,
Drying means 1 installed after the respective liquid tanks 10 and 13
5 and 16 are provided. In this processing device, the synthetic fiber paper 5 is continuously drawn from the roll wound in a roll,
The processed paper 8 is passed through the liquid tank 10-drying means 15-liquid tank 13-drying means 16 to be rewound into a roll. The impregnation of the mixture 1 in the liquid tank 10 is the same as in the case of FIG. 1, and the application of the hydrophilic binder (coating material 2) in the liquid tank 13 is the same as in the case of FIG. By applying only the hydrophilic binder (coating material 2) in the liquid tank 13 later, it is possible to prevent the water-absorbing particles that have previously adhered from falling off.

The processed paper of the present invention is very suitable for printing, and also for color printing by the ink jet system, but it may be used as a printing paper for dry copying, laser printers and thermal transfer printers.

[0022]

In the processed paper of the present invention, since the particles having water absorbability are entirely held, the ink is instantaneously fixed in the ink jet printing and the dimensional change due to the absorption of moisture by the base material. Since it is a synthetic fiber paper that does not easily deform or deform, it is tough and water resistant, and it does not easily wavy when the ink used in the inkjet method is absorbed. The defective coloring is also eliminated.

Since the base material of the processed paper of the present invention is a synthetic fiber paper having a sufficient weather resistance, the processed paper can withstand outdoor use sufficiently. The processed paper of the present invention, which is a synthetic fiber paper as a base material, is hard to tear, is unlikely to be bent or curled, is resistant to surface rubbing, and has sufficient mechanical suitability for a printer or a copying machine, Since the synthetic fiber paper also has a good surface smoothness, it is good in toner transfer and ink transfer, and is sufficiently suitable for printing by a thermal transfer method, a dry copy method or a toner method of a laser printer.

The processed paper of the present invention can be used for various purposes such as calendars, posters, maps, nautical chart printing, CAD drawings, and outdoor illuminated signboards. It is extremely useful for the demand of In addition, the material to which the tacking is applied is more useful as a material that does not trap air bubbles between the adherend and a film material having air permeability.

Then, for example, when the processed base paper, which is a polyester fiber wet non-woven fabric, is printed on the processed paper and used as a signboard, an environmental problem in the conventional signboard caused by cutting and using the vinyl chloride film is used. Can be avoided. In the case of a signboard using the processed paper of the present invention, it is possible to easily print a facial photograph or the like on a signboard, which is not possible with the vinyl chloride film cutting method, and to show it on the signboard, thereby enhancing the signboard effect.

[0026]

EXAMPLES Next, examples of the present invention will be described. -Example 1-Liquid tank A filled with a mixture of silica paste as water-absorbent particles mixed with an aqueous acrylic resin binder as a hydrophilic binder, and liquid tank B filled with an acrylic resin binder without silica paste as an impregnant Prepared respectively. The mixture for impregnation was 60% by weight of silica base, 29% by weight of acrylic resin binder, and 11% by weight of solvent (water) as 100% by weight of the liquid mixture.

On the other hand, as the synthetic fiber paper, the fiber is 0.5
Denier polyester fibers were made using a wet paper machine, and when the fibers were fused, heat of 200 ° C. or higher was applied to the fibers, which were sufficiently tight, hard to fluff, and hard, and having a thickness of 100 μm. Then, first, the synthetic fiber paper was dipped in the liquid tank A and then dried, and subsequently, the liquid in the liquid tank B was applied to the synthetic fiber paper and then dried to obtain a processed paper.

[0028] obtained in (after drying) coated paper, the coating weight of the silica particles 15.1 g / m ^2, the adhesion amount of the acrylic resin binder was 13.5 g / m ^2. -Example 2-A liquid tank A filled with a mixture of a calcium carbonate paste as water-absorbent particles mixed with an acrylic resin binder as a hydrophilic binder, and a liquid filled with an acrylic resin binder without water-absorbent particles as an impregnant Each tank B was prepared. The calcium carbonate paste content of the water-absorbent particles in the impregnating mixture was 19.5% by weight, based on 100% by weight of the entire mixture.

On the other hand, the synthetic fiber paper used in Example 1 was used as the synthetic fiber paper. Then, first, the synthetic fiber paper was dipped in the liquid tank A and then dried, and subsequently, the liquid in the liquid tank B was applied to the synthetic fiber paper and then dried to obtain a processed paper. In the obtained (after dried) processed paper, the amount of adhered particles was 9.2 g / m ² , and the amount of adhered binder was 14.5 g / m ² .
^{Was 2} .

Example 3-Liquid tank A filled with a mixture of silica paste as water-absorbent particles and SBR as a hydrophilic binder, and SBR as a hydrophilic binder without silica paste were filled as impregnants. Liquid tanks B were prepared. The content of the silica paste, which is the water-absorbent particles, in the impregnating mixture was 40% by weight based on 100% by weight of the entire mixture.

On the other hand, the synthetic fiber paper used in Example 1 was used as the synthetic fiber paper. Then, first, the synthetic fiber paper was dipped in the liquid tank A and then dried, and subsequently, the liquid in the liquid tank B was applied to the synthetic fiber paper and then dried to obtain a processed paper. In the obtained (after dried) processed paper, the amount of adhered particles was 13.4 g / m ² , and the amount of adhered binder was 16.3 g / m ² .
It was m ² .

Example 4-Liquid tank A filled with a mixture of calcium carbonate paste as water-absorbent particles mixed with SBR as a hydrophilic binder, and SBR as a hydrophilic binder without silica paste as an impregnated material Liquid tank B was prepared. The content of the calcium carbonate paste, which is the water-absorbent particles, in the impregnating mixture is 1 with the entire mixture being 100% by weight.
It was 9.5% by weight.

The synthetic fiber paper is the same as in Example 1. Then, first, the synthetic fiber paper was dipped in the liquid tank A and then dried, and subsequently, the liquid in the liquid tank B was applied to the synthetic fiber paper and then dried to obtain a processed paper. Obtained in (after drying) coated paper, the coating weight of the particles 9.9 g / m ^2, the adhesion amount of the binder was 15.4 g / m ^2.

Comparative Example 1 A liquid tank A filled with only an acrylic resin binder as a hydrophilic binder was prepared. The synthetic fiber paper is the same as in Example 1. Then, the synthetic fiber paper was immersed in the liquid tank A and then dried to obtain a processed paper. -Comparative Example 2-Liquid bath A filled with a mixture of silica paste as water-absorbent particles and melamine resin as a hydrophobic binder
And a liquid tank B filled with melamine resin as a binder excluding silica paste as an impregnated material. The content of the silica paste, which is the water-absorbent particles, in the impregnating mixture is 60% by weight based on 100% by weight of the entire mixture.
Met.

On the other hand, the synthetic fiber paper used in Example 1 was used as the synthetic fiber paper. Then, first, the synthetic fiber paper was dipped in the liquid tank A and then dried, and subsequently, the liquid in the liquid tank B was applied to the synthetic fiber paper and then dried to obtain a processed paper. In the obtained (after drying) processed paper, the amount of adhered particles was 18.6 g / m ² , and the amount of adhered binder was 12.7 g / m ² .
It was m ² .

The processed paper of Comparative Example 1 had a disadvantage that the color developability was lower than that of the processed paper of the Example. The processed paper of Comparative Example 2 had the disadvantage of ink bleeding and dripping during printing, as compared with the processed paper of the Example. Further, when a continuous processing of the processed paper was attempted under the same conditions as in Examples 1 to 4 by using the processing apparatus having the same apparatus configuration as shown in FIG. 4, the processed paper could be manufactured without any problem.

[0037]

EFFECTS OF THE INVENTION The processed paper of the present invention has the water-absorbing particles entirely retained by the hydrophilic binder.
In ink jet printing, the ink is fixed instantaneously, and the base material is a synthetic fiber paper that is unlikely to undergo dimensional changes or deformation due to absorption of moisture, so it is tough and water resistant, and absorbs the ink used in the ink jet method. Is less likely to cause waviness due to ink absorption, has less elongation due to ink absorption, and has no blurring at the ink fixing position, and has eliminated color development defects, making it suitable for inkjet printing.

Further, the processed paper of the present invention can sufficiently withstand outdoor use by being made of synthetic fiber paper and impregnated. Therefore, it becomes possible to use the one printed with the ink jet printer as the electric signboard. This leads to a reduction in the use of vinyl chloride-made weather-resistant films for plates, which is environmentally problematic, and can be said to be useful in terms of ecology.

The processed paper of the present invention has water resistance, is not easily torn, is unlikely to be bent or curled, is resistant to surface rubbing, has sufficient mechanical suitability for printers and copying machines, and is a synthetic fiber paper. Since the surface smoothness is also good, toner transfer and ink transfer are good, and it is sufficiently suitable for printing by a thermal transfer system or dry copy or a toner system of a laser printer.

The method for producing processed paper according to the present invention is as follows.
It is possible to continuously and efficiently produce the above-mentioned processed paper having practicality.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a schematic configuration example of a processing apparatus used for carrying out a method for manufacturing processed paper according to the present invention.

FIG. 2 is an explanatory diagram showing an example of a schematic configuration of a processing apparatus used for carrying out the method for manufacturing processed paper according to the present invention.

FIG. 3 is an explanatory diagram showing a schematic configuration example of a processing apparatus used for carrying out the method for manufacturing processed paper according to the present invention.

FIG. 4 is an explanatory diagram showing a schematic configuration example of a processing apparatus used for carrying out the method for manufacturing processed paper according to the present invention.

[Explanation of symbols]

 1 Mixture 2 Coating Material 5 Processing Base Paper (Synthetic Fiber Paper) 8 Processing Paper 10 Liquid Tank 11 Liquid Tank 13 Liquid Tank 15 Drying Means 16 Drying Means 11a Bevel Blade 21 Pickup Roll 22 Applicator Roll 23 Backup Roll 25 Backup Roll

Claims (2)

[Claims] 1. A processed paper for printing having water resistance, which is obtained by subjecting a synthetic fiber paper to impregnation or coating of a mixture obtained by mixing particles having water absorbency and a hydrophilic binder. 2. A roll using a processing device comprising a processing means for impregnating or coating a mixture obtained by mixing particles having water absorbency and a hydrophilic binder, and a drying means installed after the processing means. Impregnation of the mixture into the synthetic fiber paper by subjecting the synthetic fiber paper pulled out from the roll-shaped roll to the step of impregnating or applying the mixture by the processing means and then the step of drying by the drying means. A method of manufacturing a processed paper for printing, which comprises processing or coating.