JP2016198218A - Zipper tape, bag body with zipper tape, and method for manufacturing bag body with zipper tape - Google Patents

Abstract

A zipper tape-equipped bag body provided with a zipper tape that can be satisfactorily bonded using energy rays.
SOLUTION: A belt-shaped male base portion 211A integrally provided with a male portion 212 and a female side base portion 221A integrally provided with a female portion 222 are provided on a side where the male portion 212 or the female portion 222 is provided. A light absorption layer 23 and a bonding layer 24 are laminated on the opposite surface. The light-absorbing layer 23 contains a light-absorbing material that absorbs laser light having a wavelength absorption range of 800 nm to 1200 nm. The bonding layer 24 contains a metallocene linear low density polyethylene which is a low melting point resin having a melting point of 60 ° C. or higher and 120 ° C. or lower. When the zipper tape 20 is bonded to the base film 11, the light absorption layer 23 is heated and the bonding layer 24 is melted by irradiation with laser light. The molten bonding layer 24 is bonded to the base film 11 by pressure bonding. The base film 11 can be joined without thermal degradation.
[Selection] Figure 2

Description

  The present invention relates to a zipper tape, a bag body with a zipper tape, and a method for manufacturing a bag body with a zipper tape.

Conventionally, as a method of manufacturing a bag body with a zipper tape, a method of adhering a zipper tape to a film by laser irradiation is known (for example, see Patent Document 1).
The method described in Patent Document 1 has a configuration in which fasteners that mesh with each other are disposed between folded sheets, and a laser beam is focused on the joint portion between the fasteners and the sheet through the sheet so that the laser beam is focused. It is taken.

US Pat. No. 5,279,693

However, in the conventional method as described in Patent Document 1, thermal degradation of the sheet occurs due to laser irradiation, and the barrier property of the sheet decreases, or wrinkles and slack occur due to thermal contraction of the sheet. There is a risk of inconvenience.
An object of this invention is to provide the manufacturing method of the zipper tape which can adhere | attach favorably using an energy ray, the bag body with a zipper tape, and a bag body with a zipper tape.

The zipper tape of the present invention is a zipper tape including a male member and a female member that form a pair, and is characterized in that a light absorbing material having a wavelength absorption range of 800 nm or more and 1200 nm or less is contained at least in part.
In this invention, since at least a portion contains a light-absorbing material that absorbs energy rays having a wavelength absorption range of 800 nm or more and 1200 nm or less, the light-absorbing material efficiently absorbs the energy rays and the portion containing the light-absorbing member or the light-absorbing material. Only the portion containing the resin adjacent to the portion containing the member can be melted. By this, it can suppress that heat deterioration of the film etc. which attach a zipper tape arises, and can adhere | attach favorably.
Here, the energy ray in the present invention is not particularly limited as long as it can be irradiated, and for example, laser light having a wavelength in the invisible light region can be suitably used. For example, the wavelength in the ultraviolet region, the wavelength in the infrared region Etc. can be appropriately selected and used.

  In the present invention, the light-absorbing material is at least one of a phthalocyanine compound, a cyanine compound, an aminium compound, an imonium compound, a squalium compound, a polymethine compound, an anthraquinone compound, and an azo compound. And at least any one of an organic compound and at least one of carbon black, a simple substance of metal, a salt, a complex, a nitride, an oxide, and a hydroxide. preferable.

In the present invention, the male member has a laminated structure of at least two layers, and includes a male side belt-like base and a male part provided on one surface of the male side belt-like base, and the female member has at least 2 It is a laminated structure of layers or more, and includes a female side belt-like base portion and a female portion provided on one surface of the female side belt-like base portion and engageable with the male portion, and at least the male side belt-like base portion and the female side belt-like base portion It is preferable that at least one of the light-absorbing layers containing the light-absorbing material is provided in at least one layer other than the one surface layer on which the male part and the female part are provided.
In the present invention, at least one layer other than the surface layer on one side where the male part and the female part in the male side belt-like base part and the male side belt-like base part are provided, that is, the light absorbing layer faces the side that becomes the joining part when attaching the zipper tape. Therefore, it becomes possible to melt only the side which becomes a joint part by irradiation of energy rays, and the zipper tape can be efficiently attached without damaging other parts.

Furthermore, in the present invention, the male member has a laminated structure of at least three layers, and includes a male side belt-like base and a male part provided on one surface of the male side belt-like base, and the female member has at least 3 It is a laminated structure of layers or more, and includes a female side belt-like base portion and a female portion provided on one surface of the female side belt-like base portion and engageable with the male portion, and at least the male side belt-like base portion and the female side belt-like base portion Either one is provided facing the surface opposite to the one surface on which the male part and the female part are provided, and is adjacent to the bonding layer containing a resin having a melting point of 60 ° C. or higher and 120 ° C. or lower. And a light absorbing layer containing the light absorbing material.
In this invention, the male side belt-like base portion and the female side belt-like base portion on the side opposite to the surface on which the male portion and the female portion are provided, that is, the side that becomes the joining portion when attaching the zipper tape, A bonding layer is provided. Then, the light-absorbing material of the light-absorbing layer adjacent to the bonding layer absorbs the irradiated energy rays and the temperature rises to melt the bonding layer. As a result, it becomes possible to melt only the side that becomes the joining portion by irradiation of the energy rays, and the zipper tape can be efficiently attached without damaging other portions. Furthermore, by adopting a configuration in which the light-absorbing material is not included in the bonding layer itself, it is possible to prevent the bonding property with the attachment site from being damaged by the light-absorbing material.

Moreover, in this invention, it is preferable that at least any one of the said male part and the said female part was formed with resin which does not show absorption in the wavelength of 800 nm or more and 1200 nm or less.
In this invention, the male part and the female part are melted even if the male part and the female part are irradiated by forming the male part and the female part with a resin that does not absorb at wavelengths of 800 nm to 1200 nm. Can prevent inconvenience of deformation.

And in this invention, it is preferable that the part in which the said light absorption material contains contains melting | fusing point 60 to 120 degreeC resin.
In this invention, by containing a resin having a predetermined melting point in the portion where the light absorbing material is contained, the heat energy generated by the absorption of the light absorbing material by irradiation of energy rays can directly affect the melting of the resin, and the energy The irradiation energy of the line can be used efficiently for attaching the zipper tape.

Moreover, in this invention, it is preferable that the said resin has as a main component the metallocene olefin produced | generated with the metallocene catalyst.
In the present invention, by using a resin mainly composed of a metallocene olefin generated by a metallocene catalyst, the molecular weight distribution can be narrowed and the melting point can be lowered, so that the bonding can be efficiently performed with low energy.

The bag body with a zipper tape of the present invention is characterized by comprising a bag body on which films are superimposed and the zipper tape of the present invention attached to the inner surface of the bag body.
In this invention, only the part of the zipper tape containing the light absorbing member can be melted, the film can be prevented from being thermally deteriorated by the energy rays, and the yield can be prevented from deteriorating.

The manufacturing method of the bag body with a zipper tape of this invention is a manufacturing method which attaches the zipper tape of this invention to a film, and manufactures a bag body with a zipper tape, Comprising: Irradiating an energy ray of 800 nm or more and 1200 nm or less to the said zipper tape Performing an irradiation step, and a bonding step of pressure-bonding the film to a portion irradiated with the energy rays of the zipper tape melted in the irradiation step.
In this invention, since the bonded portion is melted by irradiating the energy beam to the zipper tape of the present invention containing a light absorbing material that absorbs a predetermined energy beam, the melted bonded portion is pressure-bonded to the film. It can be prevented that the wire is thermally deteriorated and the yield can be prevented from deteriorating. Furthermore, the irradiation energy of energy rays can be efficiently used for melting the zipper tape, and the zipper tape can be efficiently attached.

The front view which shows the bag body with a zipper tape in 1st embodiment of this invention. II-II sectional drawing in FIG. The conceptual diagram which shows the manufacturing apparatus of the said bag body with a zipper tape. Explanatory drawing which shows the joining process which manufactures the said bag body with a zipper tape. It is explanatory drawing which shows the process of manufacturing the said bag body with a zipper tape, (A) is a top view which shows the state which attached the zipper tape to the base film, (B) is a top view which shows the state which formed squash, (C) is a top view which shows the state which formed the side seal part, (D) is a top view which shows the state which formed the top seal part, (E) is a top view which shows a bag body with a zipper tape. Sectional drawing of the form which confirmed the bag making condition of the said bag body with a zipper tape. The front view which shows the bag body with a zipper tape in 2nd embodiment of this invention. Sectional drawing which shows the said bag body with a zipper tape. The perspective view which shows the manufacturing apparatus of the said bag body with a zipper tape. The perspective view which shows a part of manufacturing apparatus of the said bag body with a zipper tape. The side view which shows a part of manufacturing apparatus of the said bag body with a zipper tape. Sectional drawing which shows the zipper tape in other embodiment of this invention. Sectional drawing which shows the zipper tape in other embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First embodiment]
In 1st embodiment, the packaging bag for packaging various articles | goods, such as a foodstuff, a chemical | medical product, medical goods, miscellaneous goods, is illustrated as a bag body with a zipper tape.
FIG. 1 is a front view showing a bag body with a zipper tape in the first embodiment. FIG. 2 is a cross-sectional view of the bag body with a zipper tape at the position II-II in FIG.

(Configuration of bag with zipper tape)
As shown in FIGS. 1 and 2, the bag body 1 with a zipper tape according to the first embodiment includes a bag body 10 and a zipper tape 20 attached to the inner surface of the bag body 10.
The bag body 10 is formed by stacking two base film 11, which is a film serving as a packaging material, and sealing three sides to form a bag. The bag body 10 is formed with a pair of side seal portions 12 and a top seal portion 13 on the periphery, and on the other side (one side) is formed an input port 10A for putting an article to be packaged. A zipper tape 20 is attached to the inner surface of the opening 14 of the bag body 10. Further, at the positions of the side seal portions 12 at both ends in the longitudinal direction of the zipper tape 20, a crushing portion 16 in which the zipper tape 20 is crushed is formed.
The bag body 10 is sealed by sealing the bottom of the bag body 10 after an unillustrated packaged object is stored from the insertion port 10A of the bag body 10.

  The base film 11 is a polyethylene terephthalate (PET) / LLDPE as a laminated film bonded by linear low density polyethylene (LLDPE), high density polyethylene (HDPE), unstretched polypropylene (CPP), dry lamination method or extrusion lamination. PET / CPP, biaxially oriented polypropylene (OPP) / CPP, nylon / linear low density polyethylene (LLDPE), metal or inorganic vapor-deposited PET / LLDPE. Moreover, as the base film 11, in addition to a laminated structure in which a sealant layer made of unstretched polypropylene (CPP) is laminated on an outer layer on the outer surface side made of biaxially stretched polypropylene (OPP), the substrate film 11 is linear. A sealant made of low-density polyethylene (LLDPE), low-density polyethylene (LDPE), high-density polyethylene (HDPE), or the like and a base material such as polyethylene terephthalate (PET), nylon (polyamide), metal or inorganic vapor-deposited PET are dried. A laminate film bonded by a lamination method or an extrusion lamination method can be used.

2, the zipper tape 20 includes a male member 21 and a female member 22 that make a pair, and the male body 21 and the female member 22 are separated or engaged with each other, thereby forming a bag body. Ten openings 14 are opened or resealed.
The male member 21 is provided along the longitudinal direction at a substantially central position in the width direction on one surface of the male side belt-like base portion 211 and the one side of the male side belt-like base portion 211 that is a joining portion to be joined to the base film 11. And a male portion 212 having a substantially twisted cross section.
The female member 22 is provided along the longitudinal direction at a substantially central position in the width direction on one surface of the female side belt-like base 221 that is a joining portion to be joined to the base film 11 and one surface of the female side belt-like base 221. A female portion 222 that engages with the male portion 212 is provided. The male portion 212 and the female portion 222 constitute an engaging portion S.

The male side belt-like base portion 211 is laminated on the surface of the male side base portion 211A opposite to the side on which the male portion 212 is provided, and the belt-like male side base portion 211A formed integrally with the male portion 212. It is formed in a laminated structure including the formed light absorbing layer 23 and a bonding layer 24 laminated on the light absorbing layer 23.
The female-side belt-like base 221 is laminated on the surface of the female-side base 221A opposite to the side where the female-portion 222 is provided, and the female-side base-like 221A formed integrally with the female portion 222. It is formed in a laminated structure including the formed light absorbing layer 23 and a bonding layer 24 laminated on the light absorbing layer 23.

Here, the male part 212 and the male side base part 211A, and the female part 222 and the female side base part 221A transmit the laser light X even when irradiated with the laser light X (see FIG. 3) as energy rays. It is preferably formed with a composition that is difficult to melt, that is, a composition that does not have a wavelength absorption region of 800 nm to 1200 nm. Specifically, for example, resins such as various polyethylenes, various polypropylenes, polyethylene terephthalate, biaxially stretched nylon films (ONy), and ethylene-vinyl alcohol copolymers can be used.
Particularly, various polyethylenes and various polypropylenes are preferable because they are mainly used for general-purpose zipper tapes.

The light absorbing layer 23 is formed by containing a light absorbing material having a wavelength absorption range of 800 nm or more and 1200 nm or less in the resin composition.
And as a light absorption material, it is at least any one of the organic type compound and inorganic type compound which absorb the laser beam X whose wavelength absorption range is 800 nm or more and 1200 nm or less.
As the organic compound, it is possible to use at least one selected from the group of phthalocyanine compounds, cyanine compounds, aminium compounds, imonium compounds, squalium compounds, polymethine compounds, anthraquinone compounds, and azo compounds. it can.
As the inorganic compound, at least one selected from the group consisting of simple metals, metal salts, metal complexes, metal nitrides, metal oxides, and metal hydroxides can be used.
In particular, it is preferable to use carbon black that substantially absorbs light.
In addition, as the resin composition containing the light-absorbing material, resins such as various polyethylenes, various polypropylenes, polyethylene terephthalate, biaxially stretched nylon films (ONy), and ethylene-vinyl alcohol copolymers can be used.
Particularly, various polyethylenes and various polypropylenes are preferable because they are mainly used for general-purpose zipper tapes.

The bonding layer 24 is formed of various resin materials capable of transmitting the laser beam X having a wavelength absorption range of 800 nm to 1200 nm. The bonding layer 24 is melted when the light absorption layer 23 generates heat by the laser beam X transmitted through the bonding layer 24 and bonded to the base film 11.
As the resin material used for the bonding layer 24, for example, a low melting point resin having a melting point of 60 ° C. or higher and 120 ° C. or lower, specifically, a metallocene olefin generated by a metallocene catalyst is preferably used. More specifically, for example, a metallocene linear low density polyethylene having a density of 920 kg / m ³ or less and a melt flow rate (MFR) of 5 g / 10 min or less is contained in an amount of 50% by mass or more based on the entire bonding layer 24. More preferably, it is contained in an amount of 50% by mass or more and 99% by mass or less, and particularly preferably 70% by mass or more and 99% by mass or less. When the linear low density polyethylene having a density exceeding 920 kg / m ³ or MFR exceeding 5 g / 10 min is contained in an amount of 50% by mass or more, the adhesiveness to the base film 11 is poor, and the group Even if it joins with the material film 11, it will become the adhesive strength of the grade which can be easily peeled by hand. In particular, when the base film 11 is made of a polypropylene resin, there is a possibility that it cannot be satisfactorily joined.
The density of such metallocene linear low density polyethylene is preferably in a 850 kg / ^{m 3} or more 910 kg / ^{m 3} or less, in particular, it is preferable that the 860 kg / ^{m 3} or more 905 kg / ^{m 3} or less. Moreover, it is preferable that MFR shall be 1 g / 10min or more and 5 g / 10min or less.
The density may be measured according to JIS K7121, and the MFR may be measured according to JIS K7210 (190 ° C., 21.18 N load).

On the other hand, the other resin constituting the bonding layer 24 has good compatibility or mixing with the specific metallocene linear low density polyethylene, which is an essential constituent material, and a base film. 11, a metallocene linear low density polyethylene having a density of 920 kg / m ³ or less and a melt flow rate (MFR) exceeding 5.0 g / 10 min. MFR (190 ° C., 21.18 N load) is preferably 0.5 g / 10 min to 20 g / 10 min of propylene and an α-olefin copolymer having 4 to 8 carbon atoms, Ziegler linear low density polyethylene A resin such as an ethylene-polar vinyl copolymer can be used, and one of these can be used alone, or two or more can be used in combination.

  Here, when the zipper tape 20 is manufactured by coextrusion molding, if only a metallocene linear low density polyethylene having a melt flow rate (MFR) of 5 g / 10 min or less is used for the bonding layer 24, bonding is performed in the mold. Since the resin of the layer 24 flows into the male part 212 and the female part 222, and especially the tip of each hook part of the female part 222 becomes easy to close, it is difficult to extrude into a predetermined shape that can be opened and closed again. There is a risk. The metallocene linear low density polyethylene having an MFR of 5 g / 10 min or less constituting the bonding layer 24 is highly fluid, and the metallocene linear low density polyethylene having an MFR exceeding 5 g / 10 min, propylene and carbon By using the α-olefin copolymer of several 4 to 8, it is possible to prevent the collapse of the shape of the female portion 222 and the like.

  Further, the content of these resins with respect to the bonding layer 24 is preferably 1% by mass or more and 50% by mass or less, and particularly preferably 5% by mass or more and 40% by mass or less. If the content is less than 1% by mass, the effect of preventing the shape of the engaging portion S from being deformed may not be exhibited. If the content is greater than 50% by mass, the low-temperature sealing property may be impaired. In addition, good bondability with the base film 11, particularly when the base film 11 is made of a polypropylene resin, may deteriorate, which is not preferable.

  Of these resins, a copolymer of propylene and butene-1 is used as an α-olefin copolymer having 4 to 8 carbon atoms and propylene having an MFR of 0.5 g / 10 min to 20 g / 10 min. If used, in addition to the effects described above, the adhesive strength between the bonding layer 24 and the light absorbing layer 23 is excellent, which is preferable. Here, the MFR of the copolymer is more preferably 1 g / 10 min or more and 10 g / 10 min or less, and particularly preferably 2 g / 10 min or more and 8 g / 10 min or less.

As described above, the resin constituting the bonding layer 24 is a specific metallocene linear low-density polyethylene of 50% by mass to 99% by mass, a density of 920 kg / m ³ or less, and an MFR of 5.0 g / 10. A resin constituting the light-absorbing layer 23 using one of a metallocene-based linear low-density polyethylene and propylene exceeding 4 minutes and an α-olefin copolymer having 4 to 8 carbon atoms in an amount of 1 to 50% by mass. If random polypropylene is used as the zipper tape 20 by coextrusion molding, the fluidity of the bonding layer 24 and the light absorbing layer 23 becomes uniform and the extrusion speed can be made substantially equal. Random polypropylene constituting the material is not subjected to excessive shear stress, and the occurrence of shape collapse in the engaging portion S can be more suitably prevented. Can.

  And it is preferable that the random polypropylene (RPP) used as the light absorption layer 23 contains 2.0 mass% or more and 8.0 mass% or less of an ethylene component, and is 3.0 mass% or more and 6.0 mass% or less. It is particularly preferable to contain. If the ethylene component contained in the random polypropylene is less than 2.0% by mass, the re-opening / closing property of the engaging portion S may be deteriorated. On the other hand, if the ethylene component is greater than 8.0% by mass, When the metallocene linear low density polyethylene mainly used for the layer 24 is used, the same composition as the bonding layer 24 increases as the amount of random polypropylene in the light absorbing layer 23 increases. As a result, the melting point also decreases, so that the difference in melting point with the bonding layer 24 becomes small, and the bonding of the zipper tape 20 may become complicated.

  Further, the melt flow rate (MFR) of this random polypropylene (RPP) is preferably 3 g / 10 min or more and 10 g / 10 min or less, particularly preferably 5 g / 10 min or more and 9 g / 10 min or less. When the MFR of random polypropylene is smaller than 3 g / 10 min, the light absorption layer 23 and the male side base part 211A and the male part 212, or the female side base part 221A and the female part 222 are formed continuously and integrally. On the other hand, if the MFR is larger than 10 g / 10 minutes, the tip of each hook part of the female part 222 can be easily closed, and the male part 212 can easily fall over. Therefore, it may be difficult to extrude into a predetermined shape that can be opened and closed again.

  And the light absorption layer 23 and the male side base | substrate part 211A or the female side base | substrate part 221A can be obtained by integrating with the joining layer 24 by the co-extrusion method. If the zipper tape 20 is formed by such a coextrusion method, the zipper tape 20 can be manufactured continuously and stably.

  In addition, the opening position of the bag body 1 with a zipper tape should just be an opening side rather than the position of the engaging part S comprised by the male part 212 and the female part 222, a notch is put into the base film 11, By providing an opening tape in the vicinity of the male part 212 or the female part 222, it can be easily opened.

(Manufacturing device for bags with zipper tape)
Next, the manufacturing apparatus of a bag body with a sipper tape will be described.
FIG. 3 is a conceptual diagram showing an apparatus for manufacturing a bag body with a zipper tape. FIG. 4 is an explanatory view showing a joining process for manufacturing a bag body with a zipper tape.

  As shown in FIG. 3, the manufacturing apparatus 30 includes feeding rolls 31, 32, 33, four laser irradiation apparatuses 34, a pair of pressure-bonding rollers 35, a crush forming apparatus 36, and a side seal forming apparatus 37. A top seal forming device 38, and the like.

Here, as the laser irradiation device 34, any device that can absorb light by the light absorbing layer 23 of the zipper tape 20 and melt the bonding layer 24 can be used. For example, a solid-state laser such as a diode laser or a YAG laser, a liquid laser such as a dye laser, or a gas laser such as a CO ₂ laser can be used. In particular, a configuration in which the bonding layer 24 can be melted by continuously irradiating the laser beam X is preferable.
In the laser irradiation device 34, two of the four units irradiate laser beam X on both sides in the longitudinal direction of the male side band-shaped base 211, and the remaining two units both sides in the longitudinal direction of the female side band-shaped base 221. Each is irradiated with a laser beam X.
Further, the laser irradiation device 34 has the incident angle θ of the laser beam X incident on the plane of the bonding layer 24 greater than 0 ° and 90 ° or less, preferably 45 ° or more and 85 that intersects the plane of the bonding layer 24. It is arranged so that it is less than °. In particular, when the incident angle θ is smaller than 45 °, the irradiation energy of the laser beam X may not be efficiently supplied to the light absorbing layer 23. When the angle is larger than 85 °, interference between the laser irradiation device 34 and the other configuration of the manufacturing device 30 causes the bonding layer 24 to be bonded to the base film 11 by the pressure roller 35 after irradiation with the laser beam X. This is because time is required and the molten bonding layer 24 starts to cool and solidify, and there is a possibility that sufficient bonding cannot be obtained.
That is, it is necessary to arrange the laser irradiation device 34 so that the bonding layer 24 is melted by irradiation with the laser beam X and then quickly bonded to the base film 11 before the bonding layer 24 is cooled and solidified. .

As shown in FIG. 4, a pair of spacers 39 corresponding to the thickness of the male part 212 and the female part 222 of the zipper tape 20 to be engaged are engaged between the pressure rollers 35. And it arrange | positions through the clearance gap about the width dimension of the female part 222. FIG.
That is, when the zipper tape 20 interposed between the two base film 11 is pressed by the press roller 35, the base film 11 is sufficiently pressed against the male side belt base 211 and the female side belt base 221. ing.
In addition to the pressure roller 35, for example, various structures that are pressure-bonded by an endless belt or pressed by a pressing bar can be applied as the structure for pressure bonding.

(Manufacturing method of bag with zipper tape)
Next, the manufacturing method of a bag body with a zipper tape is demonstrated.
FIG. 5 is an explanatory view showing a process of manufacturing a bag body with a zipper tape, (A) is a plan view showing a state in which the zipper tape is attached to a base film, and (B) is a plan view showing a state in which crushing is formed. (C) is a top view which shows the state which formed the side seal part, (D) is a top view which shows the state which formed the top seal part, (E) is a top view which shows a bag body with a zipper tape.

First, the feeding rolls 31 and 32 of the manufacturing apparatus 30 shown in FIG. 3 send the base film 11 in a state where the base film 11 is wound in advance and faces each other.
The feeding roll 33 is wound around the zipper tape 20 in which the male member 21 and the female member 22 are previously engaged, and is fed out between the two base film 11.

Then, immediately before the zipper tape 20 is sandwiched between the pressing rollers 35, the laser irradiation device 34 irradiates the laser beam X simultaneously on both sides in the longitudinal direction of the bonding layer 24 of the zipper tape 20. The laser beam X that has passed through the bonding layer 24 and reaches the light absorption layer 23 due to the irradiation of the laser light X causes the light absorption layer 23 to generate heat, and this heat causes an irradiation process to melt the bonding layer 24 substantially uniformly in the width direction. To be implemented.
Immediately after the joining layer 24 is melted by this irradiation step, a joining step is performed in which the joining layer 24 to be melted is pressure-bonded to the base film 11 by sandwiching the zipper tape 20 between the base films 11 by the pressure roller 35. carry out. In addition, the bonding layer 24 is gradually cooled and solidified in a state where it is pressure-bonded to the base film 11 by the pressure roller 35, and is firmly bonded to the base film 11. By this joining step, the zipper tape 20 is attached between the base film 11 as shown in FIG.

Thereafter, as shown in FIG. 5 (B), the crushing forming device 56 heats and crushes the zipper tape 20 attached to the base film 11 at a predetermined interval to form the crushing portion 16.
And as shown in FIG.5 (C), the side seal | sticker part 12 is made into the direction perpendicular | vertical with respect to the longitudinal direction used as the feeding direction of the base film 11 for every position of the crushing part 16 with the side seal | sticker formation apparatus 37. A side partition portion 17 is formed.
Thereafter, as shown in FIG. 5D, the top partition portion 19 to be the top seal portion 13 is formed by the top seal forming device 58.
And the base material film 11 is cut | disconnected along the centerline of the side division part 17, and as shown to FIG.5 (E), the bag body 1 with a zipper tape which opens 10 A of inlets is obtained.

(Effects of the first embodiment)
As described above, in the first embodiment, the light-absorbing layer 23 containing the light-absorbing material that absorbs the laser light X having a wavelength absorption range of 800 nm to 1200 nm is provided.
For this reason, the light absorbing material can efficiently absorb and heat the laser beam X, and only the bonding layer 24 containing the low melting point resin adjacent to the light absorbing layer 23 can be bonded. Therefore, it can suppress that heat deterioration of the base film 11 etc. which attach the zipper tape 20 arises, and can prevent that the yield of the bag body 1 with a zipper tape to manufacture deteriorates. Furthermore, by irradiating only the zipper tape 20 with the laser beam X, the energy of the laser beam X can be efficiently used for melting the bonding layer 24, and the energy efficiency can be improved. Further, since only the bonding layer 24 is melted by the laser beam X of the digital signal, the bonding layer 24 can be melted and bonded to the base film 11 quickly, and the bag-making speed can be increased, and the bag-making efficiency can be increased. Can be improved.
Specifically, as shown in FIG. 6, it was confirmed that even the light absorption layer 23 and the bonding layer 24 configured as one light absorption bonding layer 25 can be bonded. That is, carbon black was mixed at a ratio of 1:99 with a metallocene linear low density polyethylene having a melting point of 95 ° C. and an MFR of 4.0 g / 10 min to form a light-absorbing bonding layer 25 having a thickness of 25 μm. Then, it was confirmed that the fiber laser having a wavelength of 1.07 μm can be joined at a line speed of 60 m / min (pitch 100 mm = 600 shots) of the zipper tape 20.

And in said 1st embodiment, since the light absorption material which absorbs the laser beam X whose wavelength absorption region is 800 nm or more and 1200 nm or less is used, the light absorption material absorbs the laser beam X efficiently, and the low melting point adjacent to the light absorption layer 23 is used. Only the bonding layer 24 containing the resin can be melted.
For this reason, it can suppress that thermal deterioration of the base film 11 etc. which attach the zipper tape 20 arises, and can adhere | attach favorably.

In particular, as the bonding layer 24, a low melting point resin having a melting point of 60 ° C. or higher and 120 ° C. or lower, specifically, a metallocene olefin produced by a metallocene catalyst, particularly a metallocene linear low density polyethylene is used.
For this reason, the heat energy generated by the absorption of the light absorbing material of the light absorbing layer 23 by the irradiation of the laser beam X can directly act on the melting of the low melting point resin of the adjacent bonding layer 24, and the irradiation energy of the laser beam X can be efficiently used. It can be used to attach the zipper tape 20 well.

  In the first embodiment, the bonding layer 24 is laminated on the light absorption layer 23 and the adjacent light absorption layer 23 heated by the irradiation with the laser beam X melts the adjacent bonding layer 24. It can be melted and can be satisfactorily bonded to the base film 11. Furthermore, since the light-absorbing material is not included in the bonding layer 24 that is melted and bonded to the base film 11, it is possible to prevent the light-absorbing material from damaging the bonding property with the base film 11, and good bondability is achieved. can get.

Furthermore, in the first embodiment, the male part 212 and the male side base part 211A, the female part 222 and the female side base part 221A, and the light absorbing layer 23 are made of a resin that does not absorb light at a wavelength of 800 nm to 1200 nm. It is formed using.
For this reason, the inconvenience which melt | dissolves and deform | transforms by irradiation of the laser beam X can be prevented.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to the drawings.
In the second embodiment, the bag is made using one base film 11. In addition, about the structure which is the same as that of 1st embodiment, or equivalent, the same code | symbol is attached | subjected and description is abbreviate | omitted or simplified.
FIG. 7 is a front view showing a bag body with a zipper tape in the second embodiment. FIG. 8 is a cross-sectional view showing the vicinity of a zipper tape of a bag body with a zipper tape.

(Configuration of bag with zipper tape)
As shown in FIGS. 7 and 8, the zipper tape-attached bag body 40 has the zipper tape 20 attached to the inner surface of the bag body 41.
The bag body 41 has a seal portion 15 in which one base material end portion 11A of the base material film 11 is superimposed on the other base material end portion 11A. Moreover, the side seal part 12 by which the mutual base film 11 was heat-sealed is provided in the both ends of the base film 11. The side seal portion 12 is heat sealed at both ends in the longitudinal direction of the zipper tape 20.
A storage space 10 </ b> B is formed in the bag body 41 by the seal portion 15 and the side seal portion 12. The storage space 10B can store a solid such as powder or a liquid.
A gusset 18 is formed on the bottom of the bag body 41.

(Manufacturing device for bags with zipper tape)
Next, the manufacturing apparatus of a bag body with a zipper tape is demonstrated.
FIG. 9 is a perspective view showing an apparatus for manufacturing a bag body with a zipper tape. FIG. 10: is a perspective view which shows the joining apparatus which joins the zipper tape in a manufacturing apparatus of a bag body with a zipper tape to a base film. FIG. 11 is a side view showing the joining apparatus of FIG. 9 and 10, for convenience, only one of the male member 21 and the female member 22 is shown and the other is omitted.

As shown in FIG. 9, the manufacturing apparatus 50 includes a joining device 51 and a bag making device 52.
The joining device 51 includes a tape take-up roll 511 (only one shown) that supplies a pair of male members 21 and female members 22 that are not occluded, a film take-up roll (not shown) that supplies the base film 11, and an illustration. A rotating drum 512 rotated by an omitted drive source, an introduction roller 513 for introducing the supplied male member 21 and female member 22 to the peripheral surface of the rotating drum 512, a laser irradiation device 514, a pressure roller 515, Etc.

The circumferential surface of the rotating drum 512 is provided with an introduction groove 512A (only one shown) that is formed in a groove shape along the circumferential direction and into which the male member 21 and the female member 22 are respectively inserted. Note that the introduction groove 512A is not necessarily provided.
The introduction groove 512 </ b> A is formed to a depth at which the surface of the bonding layer 24 of the male member 21 or the female member 22 inserted by the introduction roller 513 is located on substantially the same plane as the peripheral surface of the rotating drum 512.

As shown in FIG. 11, the laser irradiation device 514 irradiates the laser beam X so as to obliquely intersect the normal to the surface of the bonding layer 24. Specifically, the incident angle θ is arranged to be greater than 0 ° and 90 ° or less with respect to the tangential direction of the peripheral surface of the rotating drum 512, and preferably the incident angle θ is 45 ° or more and 85 ° or less. In particular, when the incident angle θ is smaller than 45 °, there is a possibility that the irradiation energy of the laser beam X cannot be efficiently supplied to the light absorption layer 23. When the incident angle θ is larger than 85 °, the laser irradiation device 514 and other configurations of the manufacturing device 50 Due to the interference of the laser beam X, it takes time until the bonding layer 24 is pressure-bonded to the base film 11 by the pressure roller 515 after the irradiation of the laser beam X, and the molten bonding layer 24 starts to be cooled and solidified to obtain sufficient bonding. This is because it may disappear.
For example, four laser irradiation devices 514 may be arranged to irradiate the laser beam X to both side portions in the longitudinal direction of the bonding layer 24. As a result, the entire bonding layer 24 can be easily melted uniformly, the time for melting the bonding layer 24 can be further shortened, and the zipper tape 20 can be bonded to the base film 11 in a shorter time. .

The pair of pressure rollers 515 causes the base film 11 to be introduced to the circumferential surface of the rotating drum 512, continuously travels as the rotating drum 512 rotates, and is crimped to the circumferential surface of the rotating drum 512. By the pressure roller 515, the molten bonding layer 24 of the male member 21 and the female member 22 and the introduced base film 11 are pressure bonded and bonded.
In addition, you may arrange | position a pair of press roller 515 so that the base film 11 to introduce | transduce may be directly crimped | bonded to the surrounding surface of the rotating drum 512, for example.

As shown in FIG. 9, the bag making device 52 is disposed on a side of the cylindrical former 522 and a pair of nail crushing bars 521, a cylindrical former 522 around which the base film 11 to which the zipper tape 20 is bonded is wound. The formed feed belt 523, the seal bar 524 that forms the seal part 15 by joining the two base material end parts 11A of the base film 11, the side seal bar 525 that forms the side seal part 12, and the gusset 18 are formed. And a triangular plate 526.
The pair of nail crushing bars 521 are disposed to face each other with the male member 21 and the female member 22 interposed therebetween. Then, at each predetermined interval, each claw crushing bar 521 crushes the male member 21 and the female member 22 and melts and flattens them. The melted and flattened claw crushing portion (not shown) is formed at a position corresponding to the side seal portion 12 of the bag body 40 with a zipper tape.
The cylindrical former 522 is formed in a hollow shape, and fills the bag body 40 with a zipper tape through the internal space.

(Manufacturing method of bag with zipper tape)
Next, the manufacturing method of a bag body with a zipper tape is demonstrated.
In this manufacturing method, the joining device 51 irradiates the male member 21 and the female member 22 with the laser beam X and melts them, respectively, and the male member 21 and the female member 22 in which the joining layer 24 is melted are base materials. A joining step of pressing and joining the film 11 and a bag making step of making a bag using the base film 11 to which the male member 21 and the female member 22 are attached are performed by the bag making device 52.
The male member 21 and the female member 22 each pulled out from the tape take-up roll 511 are held on the peripheral surface of the rotating drum 512 by the introducing roller 513 of the joining device 51, that is, while passing through the introducing groove 512A of the rotating drum 512, rotate. The drum 512 is continuously driven by the rotation. The rotating drum 512 is not limited to continuous rotation but may be intermittent rotation.
Then, before the position where the substrate film 11 is supplied, the laser irradiation device 514 irradiates the bonding layer 24 of the male member 21 and the female member 22 with the laser beam X so that the bonding layer 24 is substantially uniform in the width direction. An irradiation step for melting is performed.
Immediately after the bonding layer 24 is melted by this irradiation process, there is a bonding process in which the base film 11 is introduced into the peripheral surface of the rotating drum 512 by the pressure roller 515 and is bonded to the male member 21 and the female member 22 by bonding. To be implemented.

In this way, the base film 11 to which the male member 21 and the female member 22 are joined is sent to the bag making apparatus 52, and the nail crushing portion is formed on the male member 21 and the female member 22 by the claw crushing bar 521. The
Thereafter, the base film 11 is fed downward by the feed belt 523 while being wound around the cylindrical former 522. Here, the claw crushing portion and the side seal portion 12 are fed so as to coincide with each other. Then, the seal portion 15 is formed by the seal bar 524, and the gusset 18 is formed at the portion corresponding to the bottom by the triangular plate 526.
Further, one side seal portion 12 is formed by the side seal bar 525. Then, after the storage items are filled through the internal space of the cylindrical former 522, the other side seal portion 12 is formed again by the side seal bar 525. And the bag body 40 with a zipper tape is cut off.

(Effect of the second embodiment)
Even with the bag making method as in the second embodiment described above, the same effects as in the first embodiment can be obtained.
Further, in the second embodiment, since the rotating drum 512 is used, the laser beam X can be applied to the bonding layer 24 of the male member 21 and the female member 22 without causing interference with other parts of the manufacturing apparatus 50, and the manufacturing apparatus. 50 can be easily manufactured.

[Modification]
Although the best configuration for carrying out the present invention has been disclosed in the above description, the present invention is not limited to this. That is, the present invention has been described primarily with reference to specific embodiments, but with respect to the above-described embodiments without departing from the scope of the technical idea and object of the present invention, the material, quantity, and other details. In this configuration, those skilled in the art can make various modifications.
Accordingly, the description of the materials, layer structures, and the like disclosed above is exemplary for easy understanding of the present invention, and does not limit the present invention. Descriptions with names excluding some or all of the limitations are included in the present invention.

For example, in the first embodiment, the packaging of the male side belt-like base portion 211 and the female side belt-like base portion 221 has a laminated structure, but only one of them may have a laminated structure.
And as a laminated structure, as shown, for example in FIG. 12, you may form only in the both sides of the width direction joined to the base film 11 in the male side strip | belt-shaped base part 211 and the female side strip | belt-shaped base part 221. Furthermore, the male side belt-like base 211 and the female side belt-like base 221 may be formed in a meandering shape in the longitudinal direction, or may be formed in a plurality of dots.
Further, as shown in FIG. 13, for example, as shown in FIG. 13, the light-absorbing layer 23 contains a resin having a predetermined melting point (60 ° C. or higher and 120 ° C. or lower) as shown in FIG. It is also possible that only the light absorption layer 23 is laminated.
Furthermore, one of the male side belt-like base portion 211 and the female side belt-like base portion 221 is a laminated structure in which the light absorption layer 23 and the bonding layer 24 are provided, and the other is provided only with the light absorption layer 23 containing a resin having a predetermined melting point. The laminated structure thus obtained may be a different laminated structure.

In addition, the light absorption layer 23 and the bonding layer 24 may not be provided, and the light absorption material having a wavelength absorption range of 800 nm or more and 1200 nm or less may be included in the male side band base 211 and the female side band base 221. In this configuration, it is particularly preferable that the engaging portion S does not contain a light absorbing material. That is, in order to reliably prevent inconveniences such as the engagement portion S being deformed by the laser beam X being applied to the engagement portion S.
Even if the light-absorbing material is contained in the engaging portion S, the laser beam X may be prevented from being irradiated.

  Moreover, as resin of the predetermined | prescribed melting | fusing point used for the part to fuse | melt, any resin of 60 degreeC or more and 120 degrees C or less can be used, Furthermore, you may use resin materials other than this temperature range.

In 2nd embodiment, although the structure which attaches a pair of male member 21 and female member 22, respectively was illustrated, the male member 21 and the female member 22 were integrally provided in parallel, for example, and the bending part for bending in the center You may attach to the base film 11 with the zipper tape member which has this, with it being integrated.
The present invention can be applied to various bag making methods in addition to the first embodiment and the second embodiment.

Further, the zipper tape 20 may be irradiated with the laser beam X perpendicularly.
And not only when irradiating the laser beam X to both sides of the zipper tape 20, respectively, you may irradiate the center part and the whole region in the width direction. Further, irradiation may be performed so as to scan in the width direction to melt the whole. In addition to simultaneously irradiating the male member 21 and the female member 22 with the laser beam X, for example, the irradiation may be performed alternately or may be performed one side at a time.

DESCRIPTION OF SYMBOLS 1,40 ... Bag body with a zipper tape 10, 41 ... Bag main body 11 ... Base film which is a film 20 ... Zipper tape 21 ... Male member 22 ... Female member 23 ... Light absorption layer 24 ... Bonding layer 211 ... Male side strip | belt-shaped base 212 ... male part 221 ... female side belt-like base part 222 ... female part X ... laser beam which is an energy ray

Claims (9)

A zipper tape comprising a male member and a female member making a pair,
A zipper tape, wherein a light absorbing material having a wavelength absorption range of 800 nm or more and 1200 nm or less is contained at least in part. The zipper tape according to claim 1,
The light-absorbing material includes at least one organic compound selected from a phthalocyanine compound, a cyanine compound, an aminium compound, an imonium compound, a squalium compound, a polymethine compound, an anthraquinone compound, and an azo compound; A zipper tape, characterized in that it is at least one of carbon black, a simple substance of metal, a salt, a complex, a nitride, an oxide, and a hydroxide. The zipper tape according to claim 1 or 2,
The male member has a laminated structure of at least two layers, and includes a male side belt-like base and a male part provided on one surface of the male side belt-like base,
The female member has a laminated structure of at least two layers, and includes a female side belt-like base portion and a female portion that is provided on one surface of the female side belt-like base portion and can be engaged with the male portion,
At least one of the male side band-shaped base and the female side band-shaped base has at least one light-absorbing layer containing the light-absorbing material, except at least one surface layer on which the male part and the female part are provided. The zipper tape characterized by being provided in. The zipper tape according to claim 1 or 2,
The male member has a laminated structure of at least three layers, and includes a male side belt-like base and a male part provided on one surface of the male side belt-like base,
The female member has a laminated structure of at least three layers, and includes a female side belt-like base portion and a female portion that is provided on one surface of the female side belt-like base portion and can be engaged with the male portion,
Resin having a melting point of 60 ° C. or higher and 120 ° C. or lower, at least one of the male side belt-like base portion and the female side belt-like base portion facing the surface opposite to the one surface on which the male portion and the female portion are provided. And a light-absorbing layer containing the light-absorbing material adjacent to the bonding layer. The zipper tape according to claim 3 or 4,
At least one of the male part and the female part is formed of a resin that does not absorb light at a wavelength of 800 nm or more and 1200 nm or less. In the zipper tape according to any one of claims 1 to 5,
The portion containing the light-absorbing material contains a resin having a melting point of 60 ° C. or higher and 120 ° C. or lower. The zipper tape according to claim 4 or 6,
The zipper tape characterized in that the resin is mainly composed of a metallocene olefin produced by a metallocene catalyst. A bag body overlaid with films;
The zipper tape according to any one of claims 1 to 7, attached to the inner surface of the bag body,
A bag body with a zipper tape, comprising: A manufacturing method for manufacturing a bag body with a zipper tape by attaching the zipper tape according to any one of claims 1 to 7 to a film,
An irradiation step of irradiating the zipper tape with energy rays of 800 nm to 1200 nm;
A bonding step in which the film is pressure-bonded to a portion of the zipper tape melted in the irradiation step that has been irradiated with the energy ray. A method for producing a bag body with a zipper tape.

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