JP6718667B2 - Manufacturing method of laminate for packaging bag, manufacturing method of packaging bag - Google Patents

Description

The present invention relates to a method of manufacturing a packaging bag laminate and a method for manufacturing a packaging bag.

Conventionally, the non-adsorption film has a low sealing property, and the sealing film has a very low non-adsorption property.
A film-like packaging material having a sealing property and a non-adsorbing property has been developed. However, such amphoteric packaging materials are not satisfactory in any performance and are expensive.

As the non-adsorptive packaging material, a base material layer, an aluminum foil, an adhesive layer are laminated, a non-adsorptive layer and a heat seal layer are laminated on the adhesive layer, and the non-adsorptive layer is the innermost layer after bag making. It is known that the heat-sealing layer is formed at the constituent points and the heat-sealing layer is formed at the heat-fusion point on the adhesive layer (see, for example, Patent Document 1).
Further, a packaging material produced by partially forming a non-adsorptive layer on a film base material by coating and forming a sealant layer on a portion of the film base material where the non-adsorptive layer is not formed is It is known (for example, refer to Patent Document 2).

JP, 2009-285863, A JP, 2014-69885, A

However, the conventional packaging materials have problems that the sealing property and the non-adsorbing property are not sufficient, and that there are many manufacturing processes and the manufacturing cost is high.

The present invention has been made in view of the above circumstances, and has a sufficient sealing property and non-adsorptive property, and a packaging bag laminate and a manufacturing method thereof, which are easy to manufacture, and a packaging bag and a manufacturing method thereof. The purpose is to provide.

The present invention, Ri Do a laminate having at least a base material layer and the sealing layer, the laminate, in the central portion, and the base layer, said sealing layer and, three layers and functional layers are laminated in this order The base material layer and the sealing layer have a two-layer structure in which the base layer and the sealing layer are laminated in this order at the edge portion, and the surface of the sealing layer exposed at the edge portion of the laminate has fine irregularities. has an arithmetic mean roughness of the surface of the sealing layer (Ra) is a 0.4Myuemu～5myuemu, the functional layer, the production of non-adsorbing layer der Ru packaging bag laminate comprising a non-adsorbent film A method for laminating or laminating a base material layer, a seal layer, and a functional layer in this order by laminating or simultaneous multi-layer co-spraying to produce a laminate composed of the base material layer, the seal layer, and the functional layer. And the step A1 of carrying out the laminated body continuously while applying tension to the cutting roll and a back roll having a pattern of convex portions and concave portions to pass the cutting roll to the functional layer. And a step C1 of pressing a part of the functional layer to cut the laminated body after cutting and a step C1 of cutting the laminated body after cutting, the step A1, the step B1, and the step C1. Provided is a method for manufacturing a laminate for a packaging bag, which is performed in this order .

The present invention comprises a laminate having at least a base material layer and a seal layer, and the laminate has a three-layer structure in which the base material layer, the seal layer, and the functional layer are laminated in this order in a central portion. The base layer and the seal layer are laminated in this order at the edge to form a two-layer structure, and the surface of the seal layer exposed at the edge of the laminate has fine irregularities. The arithmetic mean roughness (Ra) on the surface of the seal layer is 0.4 μm to 5 μm, and the functional layer is provided with two laminates for packaging bags which are non-adsorptive layers made of non-adsorptive films. , The one or the other of the functional layers of the packaging bag laminate is in contact with the article to be packaged, the sealing bag exposed at one or the other edge of the packaging bag laminate is in contact with each other, the packaging bag A method for manufacturing a packaging bag, wherein one of the laminated body for packaging and the other of the laminated body for packaging bag are overlapped with each other, and the sealing layer of one and the other of the laminated body for packaging bag forms a seal portion, A step A2 of laminating a base material layer, a seal layer, and a functional layer in this order by laminating or simultaneous multi-layer co-spraying to produce a laminate composed of the base material layer, the seal layer, and the functional layer; The laminate, while being continuously conveyed under tension, is passed between a cutting roll and a back roll having a pattern composed of convex portions and concave portions, and the pressing roll is pressed against the functional layer, The step B2 of cutting a part of the functional layer, the step C2 of cutting the laminated body after cutting, and the two laminated bodies after cutting are used, and the one and the other functions of the laminated body after cutting are used. One of the laminated body after cutting and the other of the laminated body after cutting, so that the layer is in contact with the article to be packaged and the sealing layers exposed at one and the other edges of the laminated body after cutting are in contact with each other. And a step D2 in which the one seal layer of the laminated body after cutting and the other seal layer of the laminated body after cutting are fusion-bonded to each other to form a seal portion. Then, the process B2 is performed in this order, and subsequently, the process C2 and the process D2 are performed in a non-ordered manner .

ADVANTAGE OF THE INVENTION According to this invention, while having sufficient sealing property and non-adsorptive property, the laminated body for packaging bags which is easy to manufacture, its manufacturing method, and a packaging bag and its manufacturing method can be provided.

It is a perspective view showing a schematic structure of a layered product for packaging bags which is one embodiment of the present invention. It is sectional drawing which shows schematic structure of the packaging bag which is one Embodiment of this invention. It is a figure which shows the manufacturing method of the laminated body for packaging bags, (a) is sectional drawing which shows process A1, (b) is sectional drawing which shows process B1. It is a side view explaining process B1. It is a perspective view explaining the layered product which passed through process B1. It is sectional drawing explaining process D2. It is sectional drawing explaining process D2. It is sectional drawing explaining process C2.

Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. The drawings are schematic views, and the shapes and dimensional ratios of the respective parts may differ from the actual structure. In particular, the thickness direction of the laminated body or the like is emphasized so that the scale is larger than the plane direction.

[Laminate for packaging bag]
FIG. 1 is a perspective view showing a schematic configuration of the packaging bag laminate of the present embodiment.
The packaging bag laminate 10 of the present embodiment includes a laminate 20 having at least a base material layer 11 and a seal layer 12.
As shown in FIG. 1, the laminated body 20 has a base portion at a central portion (a central portion when the laminated body 20 is viewed in plan from the laminating direction (thickness direction) of the base material layer 11 and the sealing layer 12). A material layer 11, a seal layer 12, and a functional layer 13 are laminated in this order to form a three-layer structure. In addition, the laminated body 20 is sealed with the base material layer 11 at an edge portion (an edge portion when the laminated body 20 is viewed in plan from the stacking direction (thickness direction) of the base material layer 11 and the seal layer 12) 20b. The layer 12 and the layer 12 are laminated in this order to form a two-layer structure.

That is, the functional layer 13 is not provided at the edge portion 20b of the stacked body 20. Therefore, when the laminated body 20 is viewed in a plan view from the laminating direction (thickness direction) of the base material layer 11 and the sealing layer 12, the surface (the upper surface in FIG. 1) 12a of the sealing layer 12 at the edge portion 20b of the laminated body 20. Is exposed.
The outer shape of the packaging bag laminate 10 (laminate 20) is not particularly limited. For example, as shown in FIG. 1, a planar view from the laminating direction (thickness direction) of the base material layer 11 and the seal layer 12 is shown. If you do, it has a rectangular shape. Further, the outer shape of the functional layer 13 is not particularly limited, but, for example, as shown in FIG. 1, it has a rectangular shape when viewed in a plan view from the stacking direction (thickness direction) of the base material layer 11 and the seal layer 12. There is. In this case, the surface 12a of the seal layer 12 exposed at the edge 20b of the laminated body 20 has a frame shape (strip shape).

The surface 12a of the seal layer 12 exposed at the edge 20b of the laminated body 20 has fine irregularities. In addition, the arithmetic average roughness (Ra) on the surface 12a of the seal layer 12 is preferably 0.4 μm to 5 μm, more preferably 0.5 μm to 2 μm, and more preferably 0. More preferably, it is 5 μm to 1 μm.
When the arithmetic mean roughness (Ra) on the surface 12a of the seal layer 12 is 0.4 μm or more, when the seal layers 12 are brought into contact with each other to form a seal portion, the contact area between the seal layers 12 should be increased. You can Thereby, the adhesive force between the seal layers 12 can be increased. On the other hand, when the arithmetic average roughness (Ra) on the surface 12a of the seal layer 12 is 5 μm or less, it is possible to prevent the contact area between the seal layers 12 from becoming small. Thereby, the adhesive force between the seal layers 12 can be increased.

The arithmetic average roughness (Ra) on the surface 12a of the seal layer 12 is calculated based on Japanese Industrial Standard JIS B0601-1994.

The base material layer 11 is a single layer or a laminated base material layer.
The base material layer 11 preferably includes a plastic film. Examples of the plastic film include polystyrene resin, polypropylene resin, cyclic polyolefin resin, polyvinyl chloride resin, poly(meth)acrylic resin, polycarbonate resin, polyethylene terephthalate, polyester resin such as polyethylene naphthalate, Polyamide resin such as nylon, polyimide resin, polyamideimide resin, polyarylnaphthalate resin, silicone resin, polysulfone resin, polyphenylene sulfide resin, polyethersulfone resin, polyurethane resin, acetal resin Examples include films made of various resins such as resins and cellulosic resins.
When the base material layer 11 is a laminate of a plurality of layers or films, it can be formed by simultaneous lamination by co-spraying, lamination by lamination, or lamination by coating. Of these, lamination by lamination is preferable.
As the base material layer 11, it is also preferable to use a film having a gas barrier property (hereinafter, referred to as “gas barrier film”) for blocking gas such as oxygen and water vapor from passing through the packaging bag laminate 10. .. As the gas barrier film, for example, a metal foil such as an aluminum foil, a vapor deposition layer of aluminum or an inorganic oxide, a film made of an ethylene-vinyl alcohol copolymer (EVOH), a laminated body such as a gas barrier resin layer of vinylidene chloride or the like. Are listed.
The base material layer 11 is particularly preferably a laminate of a metal foil such as aluminum and a polyester resin such as polyethylene naphthalate or various polyamide resins such as nylon.
The thickness of the base material layer 11 is preferably 15 μm to 100 μm, and more preferably 20 μm to 50 μm.

The seal layer 12 forms a seal portion (adhesion portion) for adhering the base material layer 11 and the functional layer 13 and when a packaging bag is manufactured using two (2) laminates 10 for packaging bags. It is a layer for.
Examples of the seal layer 12 include an extruded layer of a heat-fusible resin and a plastic film.

The extruded layer of the heat-fusible resin used as the seal layer 12 is, for example, low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear (linear) low-density polyethylene, or ethylene polymerized using a metallocene catalyst. -Α/olefin copolymer, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene-methacrylic acid Methyl copolymer, ethylene-propylene copolymer, these metal cross-linked products, methylpentene polymer, polybutene polymer, polyolefin resin such as polyethylene or polypropylene acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, An acid-modified polyolefin resin modified with an unsaturated carboxylic acid such as itaconic acid, a polyvinyl acetate resin, a poly(meth)acrylic resin, or a polyvinyl chloride resin is used.

Examples of the plastic film include polystyrene resin, polypropylene resin, cyclic polyolefin resin, fluorine resin, polystyrene resin, acrylonitrile-styrene copolymer (AS resin), acrytonitrile-butadiene-styrene copolymer ( ABS resin), polyvinyl chloride resin, fluorine resin, poly(meth)acrylic resin, polycarbonate resin, polyester resin such as polyethylene terephthalate and polyethylene naphthalate, polyamide resin such as various nylons, polyimide resin Films made of various resins such as resin, polyamideimide resin, polyarylnaphthalate resin, silicone resin, polysulfone resin, polyphenylene sulfide resin, polyethersulfone resin, polyurethane resin, acetal resin, and cellulose resin Are listed.

The surface of the seal layer 12 that contacts the functional layer 13 may be subjected to a surface treatment for improving the adhesion to the functional layer 13.
Examples of such surface treatment include corona discharge treatment, ozone treatment, low temperature plasma treatment using oxygen gas or nitrogen gas, glow discharge treatment, oxidation treatment using chemicals, and the like.

The thickness of the seal layer 12 is preferably 5 μm to 200 μm. For use as a packaging material with a spout, the thickness is preferably 60 μm to 150 μm, and for a small packaging bag, it is more preferably 20 μm to 50 μm.

The functional layer 13 is a layer that, when a packaging bag is produced using the packaging bag laminate 10, is in contact with the article to be packaged and does not adsorb to the article to be packaged.
The functional layer 13 is preferably a non-adsorptive layer made of a non-adsorptive film.

In the non-adsorptive layer, a resin having a density of 1000 kg/m ³ or more and a glass transition temperature of 30° C. or more and 200° C. or less is used as a non-adsorbing resin as a component.
In polymeric materials such as plastic resins, it is often the case that the intended content cannot be maintained due to adsorption, permeation, or dissipation of the content components. This is a phenomenon that occurs because the content components are incorporated into the polymer chains of the polymer material used in the container. In a polymer material made of a plastic resin, a rotational motion of a polymer chain occurs due to a micro Brownian motion at the molecular level. Above the glass transition temperature, micro-Brownian motions of this molecular chain occur actively, so it becomes soft, and it becomes easy to take in relatively low-molecular components easily inside, and phenomena such as adsorption, permeation, and dissipation occur, It causes a decrease in the content of the ingredients. In particular, the glass transition temperature is the temperature at which the micro-Brownian motion of the polymer chain begins, which reflects the ease of movement of the polymer chain, and it is possible to design a container material that focuses on this glass transition temperature. It is the best method to solve and prevent the problem of the decrease in the content of the content component caused by the adsorption, permeation and escape of the component into the container. Since the movement of the polymer depends on the internal rotation and steric hindrance of the polymer chain, the higher the internal rotation barrier, the higher the glass transition temperature and the prevention of substance transfer phenomenon such as adsorption, permeation, and dissipation of the content components. It is possible to Therefore, a polymer material having a high glass transition temperature can be obtained by using a large number of aromatic rings or heterocycles having a high barrier against internal rotation in the main chain. Such a resin has a higher density and a higher glass transition temperature than ordinary polyolefin resins (polyethylene, polypropylene, etc.), so that the adsorption and sorption properties of components such as low molecular weight organic compounds contained in the contents are high. , The transparency is low.

Examples of the non-adsorptive resin include cyclic olefin polymer, ethylene vinyl alcohol copolymer (d=1.12 to 1.22 _g /cm ³ , T _g =50 to 60° C.), polyethylene terephthalate (d=1). .38 _g /cm ³ , T _g =68° C., 81° C.) and other polyester polymers, 6 nylon (d=1.14 _g /cm ³ , T _g =47° C.) and 66 nylon (d=1.14 _g / cm ³ , T _g =49° C.) and other polyamide polymers, polymethylmethacrylate (d=1.20 _g /cm ³ , T _g =70° C.), polyvinyl alcohol (d=1.31 _g /cm ³ , T _g =65-85° C.), polystyrene (d=1.05 g/cm ³ , T _g =100° C.), polyvinyl chloride (d=1.406 _g /cm ³ , T _g =82° C.), polyvinyl acetate ( d=1.19 g/cm ³ , T _g =30° C.) and polyacrylonitrile (d=1.15 g/cm ³ , T _g =104° C.).

The cyclic olefin-based resin is, for example, a polymer of various cyclic olefin monomers, a copolymer of a cyclic olefin monomer and another monomer such as ethylene and a hydrogenated product thereof, or a copolymer of a cyclic olefin and another monomer. Examples thereof include cyclic olefin-based polymers (COC: Cycloolefin Co-Polymer) and the like.

Examples of such cyclic olefin-based resins include polymers of various cyclic olefin monomers, copolymers of cyclic olefin monomers with other monomers such as ethylene, and hydrogenated products thereof.
Examples of the cyclic olefin monomer include norbornene, norbornadiene, methylnorbornene, dimethylnorbornene, ethylnorbornene, chlorinated norbornene, chloromethylnorbornene, trimethylsilylnorbornene, phenylnorbornene, cyanonorbornene, dicyanonorbornene, methoxycarbonylnorbornene, pyridylnorbornene, and nadic anhydride. Compounds, bicyclic cycloolefins such as nadic acid imides; tricyclic cycloolefins such as dicyclopentadiene, dihydrodicyclopentadiene and their alkyl, alkenyl, alkylidene, aryl substitution products; dimethanohexahydronaphthalene, dimethanooctahydronaphthalene and Examples thereof include tetracyclic cycloolefins such as alkyl, alkenyl, alkylidene and aryl substituents; pentacyclic cycloolefins such as tricyclopentadiene; and hexacyclic cycloolefins such as hexacycloheptadecene. Further, examples thereof include dinorbornene, a compound in which two norbornene rings are bonded by a hydrocarbon chain or an ester group, and a compound containing a norbornene ring such as an alkyl or aryl substitution product thereof.

The polymerization method and the polymerization mechanism of the monomer molecule of the cyclic olefin resin in the present invention may be ring-opening polymerization or addition polymerization. Further, as a polymerization method or a polymerization mechanism when a plurality of kinds of monomers are used in combination, a known method can be used, and it may be compounded at the time of the monomer to perform copolymerization, or may be compounded after a certain amount of time to block. You may copolymerize.
The specific structure of the cyclic olefin-based resin is not particularly limited, but may be, for example, a structural formula represented by the following general formulas (1) and (2).

(In the formula, R ¹ and R ² represent the same or different organic groups having 1 to 20 carbon atoms, and R ¹ and R ² may form a ring with each other. n is an integer of 1 or more. Indicates.)

(In the formula, R ³ and R ⁴ represent the same or different organic groups having 1 to 20 carbon atoms, and R ³ and R ⁴ may form a ring with each other. m and p are 0 or It represents an integer of 1 or more, and l represents an integer of 1 or more.)

Formula (3) shows an example of a specific structure of the cyclic olefin monomer.

Specific examples of the organic group having 1 to 20 carbon atoms include methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, sec-butyl, t-butyl, i-pentyl, t-pentyl, n-hexyl, n-heptyl, n-octyl, t-octyl (1,1-dimethyl-3,3-dimethylbutyl), 2-ethylhexyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, Alkyl groups such as pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, icosyl; cycloalkyl groups such as cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl; 1-methylcyclopentyl, 1-methylcyclohexyl, 1-methyl-4-i-propyl Alkylcycloalkyl group such as cyclohexyl; alkenyl group such as allyl, propenyl, butenyl, 2-butenyl, hexenyl, cyclohexenyl; phenyl group, naphthyl group, methylphenyl group, methoxyphenyl group, biphenyl group, phenoxyphenyl group, chlorophenyl group And aryl groups such as sulfophenyl group; aralkyl groups such as benzyl group, 2-phenylethyl group (phenethyl group), α-methylbenzyl group, α,α-dimethylbenzyl group, and the like, but are not limited thereto. It is not something that will be done. Moreover, these may be used individually by 1 type and may be used in combination of 2 or more type.

The glass transition temperature of such a cyclic olefin resin can be appropriately adjusted by appropriately selecting the values of l, m, n and p in the above general formulas (1) and (2) or the substituents. Is. Regarding the glass transition temperature of the cyclic olefin-based resin other than the above general formulas (1) and (2), the monomer species to be used, the mixing ratio of the monomer species, the monomer sequence, the types of the substituents, etc. can be arbitrarily set, Can be adjusted.

As the cyclic olefin resin represented by the general formula (1), commercially available products can be used, and for example, ZEONEX and ZEONOR manufactured by Nippon Zeon Co., Ltd. can be preferably used. As the cyclic olefin resin represented by the general formula (2), a commercially available product can be used, and for example, Apel manufactured by Mitsui Chemicals, Inc. and TOPAS manufactured by Polyplastics Co., Ltd. can be preferably used.

As the cyclic olefin resin, it is most preferable to use one represented by the general formula (1) or (2).

The cyclic olefin-based resin may contain a monomer other than the cyclic olefin, for example, a monomer unit based on α-olefin. Examples of the α-olefin include ethylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene and the like.
The cyclic olefin resin is preferably a non-crystalline polymer, more preferably a cyclic olefin homopolymer or a copolymer of a cyclic olefin and an α-olefin having 2 to 10 carbon atoms, and further preferably Is a copolymer of cyclic olefin and ethylene.

As the non-adsorptive resin, a resin having an alicyclic structure such as a cyclic olefin resin or an alicyclic polyester is preferable.
Since the resin having an alicyclic structure has a large steric hindrance as described above, the adsorptivity of the content component is low. In addition, a resin having a high glass transition temperature T _g is unlikely to cause a micro-Brownian motion at room temperature, so that the adsorption/sorption phenomenon of components is low and the storage stability of the content is excellent.

The non-adsorptive layer may contain various additives as required. Examples of the additive include a leveling agent, an antifoaming agent, an antiblocking agent such as wax and silica, a release agent such as metallic soap and amide, an ultraviolet absorber and an antistatic agent.

The thickness of the functional layer 13 is 2 μm to 50 μm from the viewpoint that if the functional layer is too thin, the function as a functional layer cannot be sufficiently exhibited, and if the functional layer is too thick, it cannot be cut off in the cutting step in the present invention. Is preferred, 5 μm to 30 μm is more preferred, and 5 μm to 20 μm is most preferred.

In the packaging bag laminate 10 of the present embodiment, since the sealing layer 12 has a sufficient sealing property and the functional layer 13 has a sufficient non-adsorption property, a packaging bag having a sufficient sealing property and a non-adsorption property is provided. Can be provided.

[Packing bag]
FIG. 2 is a cross-sectional view showing a schematic configuration of the packaging bag of this embodiment.
The packaging bag 100 of the present embodiment includes two (2) the laminate 10 for packaging bags of the above-described embodiment.
As shown in FIG. 2, the functional layer 13 of the one packaging bag laminate 10A of the two packaging bag laminates 10 and the other packaging bag laminate 10B of the two packaging bag laminates 10 are shown. The functional layer 13 is in contact with the article to be packaged 200 and directly surrounds the article to be packaged 200. In addition, the sealing layer 12 exposed at the edge of one packaging bag laminate 10A of the two packaging bag laminates 10 and the other packaging bag laminate 10B of the two packaging bag laminates 10 The seal layer 12 exposed at the edge is in contact with each other. As a result, the sealing layer 12 of the packaging bag laminate 10A and the sealing layer 12 of the packaging bag laminate 10B are joined (fused) to form the sealing portion 110. In this way, the packaging bag laminate 10A and the packaging bag laminate 10B are overlapped with each other to form the packaging bag 100.

As shown in FIG. 2, in the packaging bag 100, the edge portion 13 a of the functional layer 13 surrounding the article to be packaged 200 extends into the seal portion 110. As a result, the article to be packaged 200 does not come into contact with the seal layer 12.
The length of the functional layer 13 extending inside the seal portion 110 is not particularly limited.

The length of the seal part 110 is not particularly limited as long as a sufficient adhesive force is obtained and, as a result, a sufficient sealability is obtained.

The packaging bag 100 according to the present embodiment includes the functional layer 13 of one of the two packaging bag laminates 10A and the other of the two packaging bag laminates 10 for the packaging bag. The functional layer 13 of 10B is in contact with the article to be packaged 200 and directly surrounds the article to be packaged 200, and the sealing layer 12 exposed at the edge of the laminate 10A for the packaging bag and the laminate for the packaging bag The seal layer 12 exposed at the edge of the body 10B is in contact with each other to form the seal portion 110. As a result, the packaging bag 100 of this embodiment has sufficient sealing properties and non-adsorption properties.

[Production method of laminate for packaging bag]
Next, with reference to Drawing 3-Drawing 5, the manufacturing method of layered product 10 for packaging bags of the above-mentioned embodiment is explained.
3A and 3B are views showing a method for manufacturing the packaging bag laminate of the present embodiment, wherein FIG. 3A is a sectional view showing a step A1, and FIG. 3B is a sectional view showing a step B1.
The manufacturing method of the laminated body 10 for packaging bags of this embodiment is the same as the base material layer 11, the sealing layer 12, and the functional layer 13 laminated|stacked in this order by co-spreading, and the base material layer 11, the sealing layer 12, and Between the step A1 of manufacturing the laminate 20 including the functional layer 13 and the laminate 20 while continuously conveying the laminate 20 while applying tension, between the cutting roll and the back roll having the pattern including the protrusions and the depressions. Through, a cutting roll is pressed against the functional layer 13 to cut a part of the functional layer 13, and a step C1 of cutting the laminated body 20 after cutting. Moreover, the process A1, the process B1, and the process C1 are performed in this order.

As shown in FIG. 3A, the step A1 is a step of obtaining a laminate by laminating the functional layer 13 on the base material layer 11 by laminating a plurality of films, or by simultaneous multi-layer film formation by co-spraying. In the method of obtaining a laminated body by simultaneous multi-layer film formation by co-spraying in step A1, a base material layer 11, a seal layer 12, and a functional layer 13 are laminated in this order, and the base material layer 11, the seal layer 12 and A laminated body 20 including the functional layer 13 is produced. In the method for producing a laminate by laminating a plurality of films in this step A1, the base material layer 11 and the functional layer 13 are laminated using the seal layer 12 which also functions as an adhesive, and FIG. As shown in FIG. 5, the base material layer 11 and the functional layer 13 are bonded to each other with the seal layer 12 interposed therebetween to prepare a laminated body 20.

Examples of the laminating method include dry laminating, wet laminating, thermal laminating, extrusion laminating and hot melt laminating. Above all, a dry laminate is preferable in which an adhesive to be the seal layer 12 is applied onto the base material layer 11, dried and then laminated and adhered to the functional layer 13.

The obtained laminated body 20 has a long shape. In order to stabilize the adhesive strength, it is preferable that after the step A1 (laminating step), the laminate 20 be wound into a roll, stored (aged) at a predetermined temperature, and then subjected to the step B1 (cutting step).

FIG. 3B shows an example of the laminated body 20 that has undergone the cutting process.
In this laminated body 20, a part of the functional layer 13 constitutes the functional layer pattern 14. However, in the region other than the functional layer pattern 14 (sealing layer exposed portion 15), the functional layer 13 is exposed. 13 has been scraped off.

FIG. 4 shows an explanatory diagram of the step B1 (cutting step).
In step B1, the laminate 20 is conveyed between the cutting roll 330 and the back roll 320 while applying tension to the laminate 20 obtained in the process A1. The cutting roll 330 is arranged on the functional layer 13 side of the laminated body 20, and the back roll 320 is arranged on the base material layer 11 side of the laminated body 20.
Note that the seal layer 12 is not shown in FIG. 4 (the same applies to FIG. 5).

A pattern of convex portions 330 and concave portions 340 is formed on the surface of the back roll 320. The position and shape of the convex portion 330 correspond to the seal layer exposed portion 15, and the position and shape of the concave portion 340 correspond to the functional layer pattern 14. The convex portion 330 of the back roll 320 is preferably formed on a planar base material that can be separated from the main body (roll portion) of the back roll 320. By winding the base material having the patterned protrusions 330 around the main body roll to form the back roll 320, the pattern of the protrusions 330 can be easily changed. The height of the protrusion 330 is, for example, 50 μm to 500 μm.

By pressing the convex portion 330 against the laminated body 20 from the base material layer 11 side, a part of the laminated body 20 rises in a convex shape and comes into contact with the cutting roll 300. Fine irregularities 310 are formed on the surface of the cutting roll 300, and when the cutting roll 300 is rotated at a high speed, the functional layer 13 that is convex due to the convex portion 330 and comes into contact with the irregularities 310 is scraped off, and laminated. Removed from body 20. At this time, the seal layer 12 remains without being removed. The cutting waste can be collected in a timely manner by vacuum suction or the like.
Further, by this step B1, the arithmetic average roughness (Ra) on the surface of the seal layer exposed portion 15, that is, the surface 12a of the seal layer 12 in FIG. 1 can be set in the range of 0.5 μm to 50 μm.

FIG. 5 shows an example of the laminated body 20 that has gone through the step B1.
On the base material layer 11, the functional layer patterns 14 are regularly arranged separately in the length direction and the width direction of the laminated body 20, and the periphery of the functional layer pattern 14 is the sealing layer exposed portion 15. .. In FIG. 5, a cross section in the width direction is shown on the front side of the base material layer 11, a wavy line is shown on the back side, and both sides in the length direction are omitted.

In the obtained laminated body 20, after forming the functional layer 13 on the entire surface of the base material layer 11, a part of the functional layer 13 is removed by cutting to form the functional layer pattern 14. Therefore, the laminated body 20 has high adhesiveness of the functional layer pattern 14 to the base material layer 11 and high strength. Compared with the conventional method, the functional layer 13 to be removed is collected as dust instead of being a waste liquid, so that the processing cost is low. Moreover, productivity can be improved by improving the cutting speed.

Next, the step C1 (cutting step) will be described with reference to FIG.
In step C1, the laminated body 20 after cutting is cut into a predetermined shape and size to obtain the laminated body 10 for a packaging bag shown in FIG. In step C1, the long laminate 20 having the seal layer 12 and the functional layer pattern 14 is cut on the base material layer 11 to obtain the packaging bag laminate 10 shown in FIG. In the example shown in FIG. 5, a cutting line 31 extending in the width direction of the base material layer 11 and a cutting line 32 extending in the length direction of the base material layer 11 are set. The laminate 20 for packaging bags shown in FIG. 1 is obtained by cutting the laminate 20 along the cutting lines 31 and 32.

According to the method for manufacturing the packaging bag laminate 10 of the present embodiment, the packaging bag laminate 10 shown in FIG. 1 can be manufactured at a lower cost than the conventional method.

[Method of manufacturing packaging bag]
Next, a method of manufacturing the packaging bag 100 of the above-described embodiment will be described with reference to FIGS. 3 to 7.
The manufacturing method of the packaging bag 100 of the present embodiment is a laminated body including a base material layer 11, a seal layer 12, and a functional layer 13, which are laminated in this order to form a base material layer 11, a seal layer 12, and a functional layer 13. The step A2 of producing 20 and the laminate 20 are continuously conveyed while applying tension, and are passed between a cutting roll and a back roll having a pattern of convex portions and concave portions to function as a cutting roll. Step B2 of pressing a part of the functional layer 13 by pressing against the layer 13, step C2 of cutting the laminated body 20 after cutting, and a seal exposed at the edge of the laminated body 20A of the laminated body 20 after cutting. The layered body 20A and the layered body 20B are stacked so that the layer 12 and the sealing layer 12 exposed at the edge of the layered body 20B are in contact with each other, and exposed at the edge of the layered body 20A. And a step D2 of forming the seal part 110 by fusing the seal layer 12 exposed at the edge of the laminate 20B. Further, step A2 and step B2 are performed in this order. Then, the process C2 and the process D2 are performed out of order. That is, the step C2 and the step D2 are performed in this order after the step B2, or the step D2 and the step C2 are performed in this order after the step B2.

Step A2 in the method of manufacturing the packaging bag 100 of the present embodiment is the same as step A1 in the method of manufacturing the packaging bag laminate of the above-described embodiment. Further, step B2 in the method of manufacturing the packaging bag 100 of the present embodiment is the same step as step B1 in the method of manufacturing the packaging bag laminate of the above-described embodiment.
Therefore, the description of step A2 and step B2 is omitted.

A case where step C2 and step D2 are performed in this order following step B2 will be described.
In this case, step C2 in the method for manufacturing the packaging bag 100 of the present embodiment is the same as step C1 in the method for manufacturing the packaging bag laminate of the above-described embodiment.
Therefore, the description of step C2 is omitted.

Next, the step D2 (sealing step) will be described with reference to FIG.
In step D2, two (20) laminated bodies 20 after cutting are used. As shown in FIG. 6, the functional layer 13 of the laminated body 20A after cutting and the functional layer 13 of the laminated body 20B after cutting are in contact with the article to be packaged 200, and exposed at the edge portion 20b of the laminated body 20A. The laminated body 20A and the laminated body 20B are superposed so that the sealing layer 12 and the sealing layer 12 exposed at the edge portion 20b of the laminated body 20B come into contact with each other. Then, the seal layer 12 exposed at the edge 20b of the laminate 20A and the seal layer 12 exposed at the edge 20b of the laminate 10B are fused. As a result, as shown in FIG. 2, it is possible to form the sealing portion 110 in which the two sealing layers 12 and 12 are laminated and to surround the packaged article 200 with only the functional layer 13. The packaging bag 100 shown is obtained. When the article to be packaged 200 is a liquid or a powder, three of the four ends of the package 100 are fused and sealed, and then the packaged bag 200 is introduced into the packaging bag 100. After that, the remaining ends are fused to obtain the packaging bag 100 in which the four ends are fused.

A case will be described in which, after step B2, step D2 and step C2 are performed in this order.
The process D2 in this case will be described with reference to FIG. 7.
In step D2, two (two) laminated bodies 20 after cutting and before cutting are used. As shown in FIG. 7, the functional layer 13 of the laminated body 20A after cutting and before cutting and the functional layer 13 of the laminated body 20B after cutting and before cutting are exposed at the edge portion 20b of the laminated body 20A. The laminated body 20A and the laminated body 20B are superposed so that the sealing layer 12 and the sealing layer 12 exposed at the edge portion 20b of the laminated body 20B are in contact with each other. Subsequently, the seal layer 12 exposed in the seal layer exposed portion 15 of the laminate 20A and the seal layer 12 exposed in the seal layer exposed portion 15 of the laminate 10B are fused. As a result, as shown in FIG. 2, the seal portion 110 formed by laminating the two seal layers 12 and 12 is formed, and the article 200 is surrounded only by the functional layer 13. As a result, as shown in FIG. 8, a large number of packaging bags 120, which can surround the article to be packaged 200 by the two stacked bodies 20 before cutting, are connected in the longitudinal direction. When the article to be packaged 200 is a liquid or a powder, three of the four ends of the package 100 are fused and sealed, and then the packaged bag 200 is introduced into the packaging bag 100. After that, the remaining ends are fused to obtain the packaging bag 100 having the four ends fused.

Next, step C2 will be described with reference to FIG.
In step C2, a large number of packaging bags 120 connected in the length direction are cut by the seal portion 110 to obtain the packaging bag 100 shown in FIG.
In the example shown in FIG. 8, the packaging bag 120 shown in FIG. 1 is obtained by cutting a large number of packaging bags 120 connected in the length direction along a cutting line 131 in the thickness direction of the seal portion 110. ..

According to the method of manufacturing the packaging bag 100 of the present embodiment, the packaging bag 100 shown in FIG. 2 can be manufactured at a lower cost than the conventional method.

Although the present invention has been described above based on the preferred embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.
Each step of handling a long film such as a laminating step and a cutting step is started from a state in which the long film is wound into a roll, and is processed during the transportation of the film fed from the roll. It is preferable to carry out the method of rewinding the film on a roll, that is, a so-called roll-to-roll method.

Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples.

"Example 1"
(Production of base material layer)
A long 7 μm aluminum foil (AL) and a long 20 μm PET film are continuously laminated using a urethane adhesive to form a long base which is a laminate of the aluminum foil and the PET film. A laminate 1 to be a material layer was obtained.

(Manufacture of laminated body of functional layer and seal layer)
A cyclic olefin to be a functional layer and a linear low-density polyethylene (PE) to be a sealing layer were formed by coextrusion to obtain a long laminate 2 having a functional layer of 10 μm and a sealing layer of 50 μm.

(Process A: Manufacturing of laminated body)
A long-sized laminated body 1 to be a base material layer obtained by "manufacturing of base material layer" and a laminated body 2 obtained by "manufacturing of functional layer/sealing layer" are continuously formed using a urethane adhesive. And laminated to obtain a long laminate 3 having the following layer structure.
Cyclic olefin (25 μm)/PE (25 μm)/AL (7 μm)/PET (20 μm)

(Process B: cutting process)
The long roll-shaped laminated body 3 obtained in "Production of laminated body" was fed out and conveyed, and the functional layer side was cut. As a cutting roll, a wheel having scale-like irregularities of 2 mm x 2 mm x 2 mm in length, width and height is used, and as a back roll, a convex patterned photoresin layer is formed on the surface of a metal plate. The cyclic olefin layer, which is a functional layer, is subjected to a cutting step by using the above base material, and the cyclic olefin layer which is a functional layer has a pattern on the support layer and the seal layer. A laminated body 4 of was obtained. The arithmetic mean roughness Ra of the exposed surface of the seal layer 12 of this laminate was measured in the long direction and against the flow direction scraped during cutting under the following measurement conditions, and the average value of n=3 was taken. As a result, the average value was 0.55 μm.

(Measurement of surface roughness)
Using SURFCOM1900DX as a surface roughness meter, measurement range: 4 mm×4 mm, measurement pitch: 0.5 mm, measurement length: 4 mm, cutoff λs: 0.8 mm, cutoff λc: 2.7 μm, measurement speed: 0 The measurement was performed under the condition of 0.3 mm/sec.

(Process C: Cutting process)
The long film laminate 4 obtained in the cutting step is cut in the length direction by slits while being conveyed in the length direction, and then cut in the width direction by a cutter so that the vertical and horizontal dimensions are 10 cm×10 cm. A sheet-shaped laminate having a layer structure as described in 1 was obtained. The width of the exposed sealing layer 12 shown in FIG. 1 was 0.5 cm at any end.

(Process D: Sealing process)
Two laminated bodies obtained by the cutting step were prepared, and the functional layers were laminated so that the functional layers were located inside, and three of the four end portions of the sealing layer with exposed end portions were heat-sealed. , A bag-shaped packaging bag was manufactured. The content was introduced from the unsealed end of the obtained packaging bag, and the unsealed end was sealed by heat sealing to produce a packaging bag into which the content was introduced.

"Example 2"
Step A of Example 1: A laminated body was manufactured through the same steps A and B as in Example 1 except that the layer structure in manufacturing the laminated body was as follows. The arithmetic mean roughness Ra of the exposed surface of the sealing layer 12 of this laminate was measured under the above-mentioned measurement conditions in the longitudinal direction and against the flow direction scraped during cutting, and the average value of n=3 was taken. As a result, the average value was 0.90 μm.
Cyclic olefin (20 μm)/PE (35 μm)/AL (7 μm)/PET (20 μm)
Using the above-mentioned laminated body, a package in which the contents were introduced was manufactured through the same steps C and D as in Example 1.
This packaging bag was good in that the contents did not adsorb to the container because the contents contact only the non-adsorptive functional layer. Also, the sealing strength was very good.

"Comparative Example 1"
The laminate 1 described in the example and a 50 μm polyethylene film were laminated with the aluminum foil side of the laminate 1 inside, and a long laminate 5 was obtained.
The laminated body 5 was cut to obtain a sheet-shaped laminated body 6 having a layer configuration as shown in FIG. 1 having vertical and horizontal dimensions of 10 cm×10 cm.
A functional layer made of a cyclic olefin was applied on the polyethylene layer of the sheet-shaped laminate 6 so as to have a thickness of 10 μm, and a laminate 7 having a seal layer in part was obtained. The laminate 7 had a structure as shown in FIG. 1, and the layer structure was as follows.
Cyclic olefin (10 μm/central part)/PE (50 μm)/AL (7 μm)/PET (20 μm)

The arithmetic mean roughness Ra of the surface of the exposed seal layer made of polyethylene was measured under the above-mentioned measurement conditions, and an average value of n=3 was taken. The average value was 0.30 μm.
This was laminated in the same manner as the sealing process described in Example 1. Since the contents contact only the non-adsorptive functional layer, the contents do not adsorb to the container. However, since the functional layer is provided by coating, the adsorptivity is higher than those in Examples 1 and 2. It was inferior. Also, the sealing strength was inferior to that of Examples 1 and 2 probably because it was manufactured using polyethylene having a small roughness.

10, 10A, 10B... Laminate for packaging bag, 11... Base layer, 12... Seal layer, 13... Functional layer, 14... Functional layer pattern, 20... Laminate , 31, 32... Cutting line, 100, 120... Packaging bag, 110... Sealing part, 131... Cutting line, 200... Packaged item, 300... Cutting roll, 310. ..Concavo-convex, 320...back roll, 330...convex part, 340...concave part.

Claims (2)

The laminate has at least a base layer and a seal layer, and the laminate has a three-layer structure in which the base layer, the seal layer, and the functional layer are laminated in this order at the center, In the part, the base layer and the seal layer have a two-layer structure in which they are laminated in this order, and the surface of the seal layer exposed at the edge of the laminate has fine irregularities, and the seal The arithmetic mean roughness (Ra) on the surface of the layer is 0.4 μm to 5 μm, and the functional layer is a method for producing a laminate for packaging bags, which is a non-adsorptive layer made of a non-adsorptive film,
A step of laminating a base material layer, a seal layer, and a functional layer in this order by laminating or simultaneous multi-layer co-spraying to produce a laminate composed of the base material layer, the seal layer, and the functional layer, A1.
The laminate, while being continuously conveyed under tension, is passed between a cutting roll and a back roll having a pattern composed of convex portions and concave portions, and the pressing roll is pressed against the functional layer, Step B1 of cutting a part of the functional layer,
A step C1 of cutting the laminated body after cutting,
The method for producing a laminate for a packaging bag, which comprises performing the step A1, the step B1, and the step C1 in this order. The laminate has at least a base layer and a seal layer, and the laminate has a three-layer structure in which the base layer, the seal layer, and the functional layer are laminated in this order at the center, In the part, the base layer and the seal layer have a two-layer structure in which they are laminated in this order, and the surface of the seal layer exposed at the edge of the laminate has fine irregularities, and the seal The arithmetic mean roughness (Ra) on the surface of the layer is 0.4 μm to 5 μm, and the functional layer is provided with two laminates for a packaging bag which is a non-adsorptive layer made of a non-adsorptive film. One of the functional layers of the laminate for use in contact with the article to be packaged, the sealing layer exposed at the edge of one and the other of the laminate for packaging bag is in contact with each other, the laminate for the packaging bag A method for manufacturing a packaging bag, wherein one of the packaging bag laminate and the other of the packaging bag laminates is overlapped, and one and the other sealing layers of the packaging bag laminate form a seal portion,
A step A2 of laminating a base material layer, a seal layer, and a functional layer in this order by laminating or simultaneous multi-layer co-spraying to produce a laminate composed of the base material layer, the seal layer, and the functional layer;
The laminate, while being continuously conveyed under tension, is passed between a cutting roll and a back roll having a pattern composed of convex portions and concave portions, and the pressing roll is pressed against the functional layer, Step B2 of cutting a part of the functional layer,
Step C2 of cutting the laminated body after cutting,
The above-mentioned seal that uses two laminated bodies after cutting, one and the other functional layers of the laminated body after cutting contact a packaged product, and are exposed at one and the other edges of the laminated body after cutting. One of the laminated bodies after cutting and the other of the laminated bodies after cutting are overlapped so that the layers are in contact with each other, and the sealing layer of one of the laminated bodies after cutting and the other of the laminated bodies after cutting A step D2 of forming a seal portion by fusing the seal layer,
The method of manufacturing a packaging bag, wherein the step A2 and the step B2 are performed in this order, and then the step C2 and the step D2 are performed in an unordered order.

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