JPH11263378A - Liquid pouch package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the production of a bag which is highly strong, excellent in barrier ability against oxygen gas, steam or the like and excellent from an environmental viewpoint by providing a thin film of inorganic oxide as a barrier material on one of faces of a flexible plastic base and further by laminating a specific resin layer and an adhesive layer. SOLUTION: At least a thin film 2 of inorganic oxide, a coating thin film 3 comprising a polyurethane containing resin composition including silane coupling agent and filler, an anchor coat agent layer and/or a laminating adhesive layer 4 and a heat-sealable resin layer 5 are sequentially laminated on one of faces of a flexible plastic base to form a laminate A. Faces of the heat- sealable resin layer 5 of the laminate A are faced and overlaid, and three sides of their outer periphery are heat-sealed, forming a pouch. Seasoning or the like comprising a liquid or viscous substance is filled from its opening to be packaged, thereby manufacturing a pouch package which does not alter in contents during storage or distribution and is suitable to incineration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid pouch package, and more particularly, to a liquid pouch package having excellent strength and strength, and excellent barrier properties against oxygen gas and water vapor. It has laminate strength and does not impair the flavor and taste of the contents during storage, storage or distribution.For example, liquids such as soy sauce, sauce, broth, spices, cooking liquors, etc. Seasonings, soups,
The present invention relates to a liquid pouch package which is filled and packed with various liquid or viscous foods and drinks such as fruit juices and others.

[0002]

2. Description of the Related Art Conventionally, liquid sachets of various forms have been developed and proposed as liquid sachets for filling and packaging seasonings such as liquids or viscous materials, and the like. Examples include a polyethylene terephthalate film or a nylon film as a base film, an aluminum foil or a resin film coated with a vinylidene chloride resin composition as a barrier material, and heat sealability. 2. Description of the Related Art There is known a small bag made of a packaging laminated film in which a polyethylene-based resin layer as a resin layer is sequentially laminated. This one is
When packed with a liquid seasoning such as soy sauce or sauce, it is excellent in oxygen gas barrier properties or water vapor barrier properties, and is also excellent in various robustness, chemical resistance, etc. Even if stored and stored for a long time, the sachets are extremely excellent as sachets without impairing the flavor and taste of the contents.

[0003]

However, in the above-mentioned sachets, due to the growing awareness of environmental problems in recent years, for example, when discarded as garbage after use and incinerated, packaging containing vinylidene chloride resin is required. In materials for packaging, problems such as generation of harmful gas have been pointed out, and in packaging materials containing aluminum,
Problems such as damage to incinerators have been pointed out, and in any case, there are concerns about the impact on the environment, etc., when disposing of them. In order to solve the above problems, for example, as a material having a barrier property, a polyamide-based resin, or a resin film made of a saponified ethylene-vinyl acetate copolymer or the like is used. Packaging bags and the like made of the laminated materials used have been proposed, but also in these cases, the above-mentioned problems have been solved because of insufficient barrier properties or large humidity dependency. The fact is that it has not been done yet. Therefore, the present invention has strength, excellent in various robustness, furthermore, excellent in barrier properties against oxygen gas, water vapor, and the like, and has excellent laminate strength, during storage, storage or distribution thereof. Without impairing the flavor and taste of the contents,
It is an object of the present invention to provide a liquid small bag package which is packed with a seasoning or the like made of a liquid or viscous body which is excellent in environmental compatibility.

[0004]

As a result of various studies to solve the above problems, the present inventor focused on a resin film having an inorganic oxide thin film as a barrier material. When a film of another resin such as a heat-sealing resin layer is laminated on a resin film having a thin film of an inorganic oxide as the barrier material, a silane coupling agent and a filler are contained. Focusing on using a polyurethane-based resin composition and an anchor coating agent and / or an adhesive for laminating, first, a thin film of an inorganic oxide is formed on one surface of a flexible plastic substrate. And,
On the inorganic oxide thin film, a coating thin film made of a polyurethane resin composition containing a silane coupling agent and a filler is provided, and further, an anchor coating agent layer made of an anchor coating agent and And / or providing a laminating adhesive layer with a laminating adhesive, and then laminating a heat-sealing resin layer to form a laminated material. -The sealable resin layer surfaces are superimposed on each other, and the peripheral portion thereof is heat-sealed to provide a heat seal portion to form a bag body. A liquid sachet package was manufactured by filling and packaging a seasoning or the like consisting of a liquid or viscous body from the opening, and was found to have strength and excellent robustness, as well as barrier properties against oxygen gas, water vapor, etc. Excellent and has excellent laminate strength during storage, storage or distribution Without impairing the flavor of the contents thereof and taste like, it is furthermore, and completed the present invention have found that it is possible to produce a liquid pouch package having incineration suitability even when discarded treated as waste after use.

That is, the present invention provides a coating film of a polyurethane resin composition containing at least a thin film of an inorganic oxide, a silane coupling agent and a filler on one surface of a flexible plastic substrate, An anchor coating agent layer made of an anchor coating agent and / or a laminating adhesive layer made of a laminating adhesive;
Layers are sequentially laminated to form a laminated material.
The laminated material is overlapped with the heat-sealing resin layer surface facing the heat-sealing end of the outer periphery.
The present invention relates to a liquid pouch package, characterized in that a bag is formed by providing a seal portion, and the bag is filled with a liquid or viscous body through an opening of the bag.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below. First, the configuration of the liquid pouch package according to the present invention will be described with reference to the drawings by exemplifying a few of them. FIGS. 1 and 2 show one example of the laminated material forming the liquid pouch package according to the present invention. FIG. 3 and FIG. 4 are schematic cross-sectional views showing two examples of the layer structure. FIGS. 3 and 4 show one example of the structure of the liquid sachet made using the laminated material according to the present invention shown in FIG. It is a schematic perspective view showing,
FIGS. 5 and 6 are schematic perspective views showing one example of the structure of the liquid pouch package formed by filling and packing the contents in the liquid pouch according to the present invention shown in FIGS. 3 and 4 described above. is there.

A few examples of the laminated material constituting the liquid pouch package according to the present invention are as follows. First, as the laminated material according to the present invention, as shown in FIG. On one surface of the substrate, at least a thin film 2 of an inorganic oxide, a coating thin film 3 of a polyurethane resin composition containing a silane coupling agent and a filler, an anchor coating agent of an anchor coating agent Adhesive layer 4 for laminating with layer and / or adhesive for laminating,
Further, the basic structure is a laminated material A having a configuration in which heat-sealing resin layers 5 are sequentially laminated. Next, as another example of the laminated material according to the present invention, as shown in FIG. 2, as shown in FIG. 2, the laminated material A shown in FIG. Further, a laminated material B having a configuration in which at least a tough base film layer 6 is laminated can be given. The above-mentioned examples are exemplifications of 12 examples constituting the laminated material according to the present invention, and the present invention is not limited thereto.For example, in the present invention, although not shown, Depending on the purpose of use, the contents to be filled and packaged, the distribution channel, the sales form, the application, and the like, other base materials can be arbitrarily laminated, and various forms of laminated materials can be designed and manufactured. In the present invention, a thin film 2 of an inorganic oxide, a coating thin film 3 of a polyurethane resin composition containing a silane coupling agent and a filler, and an anchor coating agent of an anchor coating agent It is important that the layer and / or the laminating adhesive layer 4 made of the laminating adhesive be laminated adjacent to each other in this order, but other base materials are used in the same manner. Depending on the purpose, application, and the like, various types of laminated materials can be designed and manufactured by arbitrarily laminating.

Next, in the present invention, the structure of a liquid pouch made by using the above-described laminated material will be described. As the liquid pouch, for example, FIG.
As an example, a liquid pouch made by using the laminated material A shown in FIG. 3 will be described. As shown in FIG. 3, two laminated materials A, A are prepared, and a heat sink positioned at the innermost layer is prepared. -Superposing the surfaces of the sealing resin layers 5 and 5 on each other, and then heat-sealing the three ends of the outer periphery thereof to form a sealing portion 7,
By forming 7 and 7, the three-side seal type liquid pouch C according to the present invention can be manufactured. Alternatively, as the liquid pouch according to the present invention, as shown in FIG. 4, the above-mentioned laminated material A is prepared, and this is folded back to form a heat-sealing resin layer 5, 5 located at the innermost layer. The two sides of the outer peripheral edge are heat-sealed to form seal portions 7, 7, and the two-way seal type according to the present invention is then formed. Can be manufactured.

Thus, in the present invention, as shown in FIG. 5, the liquid sachet C manufactured as described above is used, and for example, soy sauce, source, or the like is opened through the opening 8 (shown in FIG. 3). A liquid or viscous seasoning 9 such as other is filled, and then the opening 8 is heat-sealed to form an upper heat-sealing portion 10.
Is formed, and the liquid pouch package E according to the present invention can be manufactured. Alternatively, in the present invention, as shown in FIG. 6, the liquid sachet D manufactured as described above is used, and for example, soy sauce, source, or the like is opened through the opening 8 (shown in FIG. 4).
A liquid or viscous seasoning 9 such as other is filled, and then the opening 8 is heat-sealed to form an upper heat-sealing portion 10, and the liquid pouch package according to the present invention is formed. F can be manufactured. In FIG. 5 and FIG. 6, reference numeral 11 denotes a break for opening such as an I notch or a V notch. The above examples illustrate the liquid sachet according to the present invention, or, for a liquid sachet package, twelve examples thereof, and the present invention is not limited thereto, for example, as a form of a liquid sachet. Although not shown in the drawings, for example, a pouch form suitable for the contents such as a pillow-package form, a gusset package form, a standing pouch package form, and the like can be taken.

Next, in the present invention, the materials constituting the liquid pouch package according to the present invention as described above, the manufacturing method, and the like will be described. Can be used. First, in the present invention, the material constituting the liquid pouch package according to the present invention will be described. First, as a flexible plastic substrate, a plastic film or sheet capable of holding a thin film of an inorganic oxide is used. Any material can be used as long as it is available. For example, polyolefin resins such as polyethylene, polypropylene and polybutene, (meth) acrylic resins, polyvinyl chloride resins, polystyrene resins, polyvinylidene chloride resins, ethylene- Various types of saponified vinyl acetate copolymer, polyvinyl alcohol, polycarbonate resin, fluorine resin, polyvinyl acetate resin, acetal resin, polyester resin, polyamide resin, etc. A resin film or sheet can be used. These resin films or sheets may be uniaxially or biaxially stretched, and may have a thickness of 10 to 20.
It is desirably about 0 μm, preferably about 10 to 100 μm. If necessary, an anchor coating agent or the like may be coated on the surface of the resin film or sheet.
Surface smoothing or corona treatment,
Pretreatment such as ozone treatment and plasma treatment can also be performed.

Next, in the present invention, as the inorganic oxide thin film constituting the liquid pouch package, any thin film in which a metal oxide is made amorphous can be used. For example, silicon (Si), aluminum (Al), magnesium (Mg), calcium (C
a), potassium (K), tin (Sn), sodium (N
a) A thin film in which an oxide of a metal such as boron (B), titanium (Ti), lead (Pb), zirconium (Zr), and yttrium (Y) is made amorphous can be used. Thus, as a material suitable for a packaging material or the like, a thin film in which an oxide of a metal such as silicon (Si) or aluminum (Al) is made amorphous can be given. Thus, a thin film in which the above metal oxide is made amorphous can be referred to as a metal oxide, such as silicon oxide, aluminum oxide, and magnesium oxide. For example, SiO _X ,
AlO _X, MO _X as such as MgO _X (However, in the formula,
M represents a metal element, and the value of X varies depending on the metal element. ). In addition, the above X
Of silicon (Si) are 0 to 2, aluminum (Al) is 0 to 1.5, and magnesium (M
g) is 0-1, calcium (Ca) is 0-1, potassium (K) is 0-0.5, tin (Sn) is 0-2,
Sodium (Na) is 0-0.5, and boron (B) is
0, 1, 5, titanium (Ti): 0, 2, lead (Pb)
Can take a value in the range of 0 to 1, zirconium (Zr) takes a value of 0 to 2, and yttrium (Y) takes a value of 0 to 1.5. In the above, when X = 0, it is a perfect metal;
It is not transparent and cannot be used at all, and the upper end of the range of X is a fully oxidized value. In the present invention, as a packaging material, generally, silicon (Si),
Except for aluminum (Al), few examples are used,
Silicon (Si) is 1.0-2.0, aluminum (A
For l), a value in the range of 0.5 to 1.5 can be used. In the present invention, the thickness of the thin film of the inorganic oxide as described above varies depending on the type of the metal or the metal oxide to be used.
It is desirable to arbitrarily select and form it within the range of 0 °, preferably 100 to 1000 °. Further, in the present invention, the inorganic oxide thin film is not limited to one layer of the inorganic oxide thin film, but may be a laminate of two or more layers. Can be used alone or as a mixture of two or more to form a thin film of an inorganic oxide mixed with different materials.

Next, a method of forming a thin film of an inorganic oxide on a flexible plastic substrate in the present invention will be described. Examples of the method include a vacuum deposition method, a sputtering method, and an ion plating method. Physical Vapor Depth Method (Physical Vapor Depth Method)
chemical vapor deposition (PVD), or a chemical vapor deposition method such as a plasma chemical vapor deposition method, a thermal chemical vapor deposition method, or a photochemical vapor deposition method.
(e.g., deposition method, CVD method). In the present invention, when manufacturing a laminate used for packaging materials, mainly using a vacuum evaporation method,
In part, plasma enhanced chemical vapor deposition is also used. As a specific example, FIG. 7 is a schematic configuration diagram illustrating an example of a roll-up type vapor deposition machine. As shown in FIG. 7, in a vacuum chamber 111, a flexible plastic base material 113 unwound from an unwinding roll 112 is coated with a coating drum 1.
14 and into the evaporation chamber-115, where the evaporation source heated by the crucible 116 is evaporated, and if necessary, the above-described cooling is performed while oxygen or the like is ejected from the oxygen outlet 117. Coating drum 11
4 on the flexible plastic substrate 113
Forming an inorganic oxide vapor-deposited film through 18, 118;
Next, a flexible plastic substrate 113 on which a vapor-deposited film is formed
Is fed into a vacuum chamber 111 and wound up on a take-up roll 119, whereby a flexible plastic substrate having a thin film of an inorganic oxide according to the present invention can be manufactured.

In the present invention, the method of forming a thin film of an inorganic oxide will be further described. A vacuum evaporation method in which the above-described metal oxide is used as a raw material and heated to deposit on a flexible plastic substrate Or, using a metal or metal oxide as a raw material, oxidizing by introducing oxygen and depositing on a flexible plastic substrate, an oxidation reaction deposition method, and a plasma-assisted type method for further assisting the oxidation reaction with plasma. A deposition film can be formed by an oxidation reaction deposition method or the like. In addition,
In the present invention, when forming a deposited film of silicon oxide, the deposited film can be formed by a plasma chemical vapor deposition method using organosiloxane as a raw material.

Further, in the present invention, a silane coupling agent forming a coating thin film of a polyurethane resin composition containing a silane coupling agent and a filler constituting a liquid pouch package is a binary silane coupling agent. Reactive organofunctional silane monomers can be used,
For example, γ-chloropropyltrimethoxysilane, vinyltrichlorosilane, vinyltriethoxysilane, vinyl-tris (β-methoxyethoxy) silane, γ-methacryloxypropyltrimethoxysilane, β- (3,
4-epoxycyclohexyl) ethyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, vinyltriacetoxysilane, γ-mercaptopropyltrimethoxysilane, N-β (aminoethyl) -γ-aminopropyltrimethoxysilane, N -Β (aminoethyl) -γ-aminopropylmethyldimethoxysilane, γ
One or more of ureidopropyltriethoxysilane, bis (β-hydroxyethyl) -γ-aminopropyltriethoxysilane, an aqueous solution of γ-aminopropylsilicone and the like can be used. The silane coupling agent as described above hydrolyzes a functional group at one end of the molecule, usually a chloro, alkoxy, or acetoxy group, to form a silanol group (SiOH),
This is a metal constituting the inorganic oxide thin film, or an active group on the surface of the inorganic oxide thin film, for example, a functional group such as a hydroxyl group, by any action, for example, causing a reaction such as dehydration condensation reaction, inorganic A silane coupling agent is modified on the surface of the oxide thin film by a covalent bond or the like.
A strong bond is formed on the surface of the inorganic oxide thin film itself by adsorption or hydrogen bonding. On the other hand, an organic functional group such as vinyl, methacryloxy, amino, epoxy, or mercapto at the other end of the silane coupling agent is formed on a thin film of the silane coupling agent, for example,
It reacts with the substances constituting the adhesive layer for the laminate, the anchor coating agent layer, other layers, etc. to form a strong bond. Further, the adhesive layer for the laminate, the anchor layer, The heat-sealing resin layer is firmly and tightly adhered to the heat-sealing resin layer via the agent layer or the like, thereby increasing the laminating strength. Thus, in the present invention, the heat-sealing resin layer has a high laminating strength. It is possible to form a complicated laminated structure. In the present invention, the inorganic and organic properties of the silane coupling agent are utilized to form an inorganic oxide thin film, a coating thin film, a laminating adhesive layer or an anchor coating agent layer, and the like. Through this, the close-adhesion with the heat-sealing resin layer is improved,
The laminating strength is improved.

Next, in the present invention, as a filler forming a coating thin film of a polyurethane resin composition containing a silane coupling agent and a filler constituting a liquid pouch package, for example, calcium carbonate, Barium sulfate, alumina white, silica, talc, glass frit, resin powder, and the like can be used.

Next, in the present invention, as a polyurethane resin forming a coating thin film of a polyurethane resin composition containing a silane coupling agent and a filler constituting a liquid pouch package, for example, a polyfunctional resin Polymers obtained by reacting isocyanate with a hydroxyl group-containing compound, specifically, aromatic polymers such as tolylene diisocyanate, diphenylmethane diisocyanate, polymethylene polyphenylene polyisocyanate, etc. Polyisocyanates or polyfunctional isocyanates such as aliphatic polyisocyanates such as hexamethylene diisocyanate and xylylene diisocyanate; and polyethers.
One-pack or two-pack polyurethane resins obtained by reaction with hydroxyl group-containing compounds such as tell-based polyols, polyester-based polyols, and polyacrylate polyols can be used. Thus, in the present invention, by using a polyurethane resin as described above, a coating thin film having flexibility, flexibility and the like of the coating thin film is formed, and its elongation and the like are improved. For example, it is suitable for post-processing such as laminating or bag-forming, and prevents cracking of the inorganic oxide thin film during post-processing.

In the present invention, the polyurethane-based resin composition is used in an amount of about 0.05 to 10% by weight, preferably about 0.1 to 30% by weight, based on 1 to 30% by weight of the polyurethane-based resin. 1% to 5% by weight, filler: 0.1 to 20% by weight, preferably 1 to 10% by weight
If necessary, add additives such as stabilizers, curing agents, cross-linking agents, lubricants, UV absorbers, etc., and add solvents, diluents, etc., and mix well. To prepare a polyurethane-based resin composition. Thus, in the present invention, the polyurethane resin composition as described above may be used, for example, in roll coat, gravure coat, knife coat, dip coat, spray coat, and other coatings. The coating film is coated on the inorganic oxide thin film by a method, and then the coating film is dried to remove the solvent, the diluent and the like, thereby forming the coating thin film according to the present invention. In the present invention, the thickness of the coating thin film made of the polyurethane resin composition is, for example, about 0.01 to 50 μm, preferably 0.1 to 5 μm.
The m-th position is desirable. In the present invention, the coating thin film of the polyurethane-based resin composition containing the silane coupling agent and the filler as described above, as described above, the inorganic and organic silane coupling agent has, or,
Utilizing the flexibility, flexibility, etc. of polyurethane resin, inorganic oxide thin film, coating thin film, laminating
Through an adhesive layer for coating or an anchor coating agent layer, etc.
Improves the close adhesion with the heat-sealing resin layer, thereby preventing the occurrence of cracks and the like in the inorganic oxide thin film,
The laminating strength is improved. In the present invention, the polyurethane resin composition as described above may further include, if necessary, for example, nitrocellulose.
Cellulose derivatives such as water and other binders can be optionally added.

Next, in the present invention, examples of the anchor coating agent forming the anchor coating agent layer by the anchor coating agent constituting the liquid pouch package include alkyl titanate and the like. Organic titanium-based anchor coating agent, isocyanate-based anchor coating agent, polyethyleneimine-based anchor coating agent, polybutadiene-based anchor coating agent,
Others can be used. Thus, in the present invention, similarly to the above, an anchor coating agent is used, for example,
Roll coating, gravure coating, knife coating, dip coating, spray coating, or other coating methods, and drying the solvent, diluent, etc. -An anchor coating agent layer can be formed by a coating agent. In the above, the coating amount of the anchor coating agent is preferably about 0.1 to 5 g / m ² (dry state).

Next, in the present invention, examples of the laminating adhesive forming the adhesive layer of the laminating adhesive constituting the liquid pouch package include polyurethane-based, polyester-based, polyamide-based adhesives. Solvents containing epoxy, poly (meth) acrylic, polyvinyl acetate, polyolefin or modified polyolefin, casein, wax, ethylene- (meth) acrylic acid copolymer, polybutadiene, etc. as the main components of the vehicle Type,
Various laminating adhesives such as an aqueous type, a non-solvent type, and a hot melt type can be used. Thus, in the present invention, as described above, the laminating adhesive is
For example, roll coat, gravure coat, knife coat
Coating with a coating method such as coating, dip coating, spray coating, or other coating method, and drying the solvent, diluent, etc.
An adhesive layer can be formed using the adhesive for laminating according to the present invention. In the above, the application amount of the laminating adhesive is 0.1 to 5 g / m ² (dry state).
Position is desirable.

In the present invention, the anchor coating agent forming the above-described anchor coating agent layer and the laminating adhesive forming the laminating adhesive layer are as follows. For example, similarly to the above-mentioned coated thin film made of the polyurethane-based resin composition, for example, aromatic polyisocyanates such as tolylene diisocyanate, diphenylmethane diisocyanate, and polymethylene polyphenylene polyisocyanate. Or polyfunctional isocyanates such as aliphatic polyisocyanates such as hexamethylene diisocyanate and xylylene diisocyanate; polyether-based polyols; polyester-based polyols; Polyether polyurethane resin obtained by reaction with a hydroxyl group-containing compound such as Ester polyurethane resin or, polyacrylate - co - - anchor mainly of bets polyurethane resin preparative agents, or laminating - those it is desirable to use the preparative adhesive. Thus, the above-described anchor coating agent or the anchor coating agent layer formed by using the laminating adhesive, or the laminating adhesive layer, It is possible to form a soft, flexible, and flexible thin film, and synergistically with the coating thin film of the above-mentioned polyurethane-based resin composition to improve its tensile elongation and improve inorganic oxidation. Acts as a film having flexibility, flexibility, etc. on the thin film of the product, and improves post-processing suitability of the inorganic oxide thin film during post-processing such as laminating, printing, or bag making. This prevents the occurrence of cracks and the like in the inorganic oxide thin film during post-processing. Incidentally, in the present invention, the above-mentioned anchor coating agent layer made of the anchor coating agent and / or the laminating adhesive layer made of the laminating adhesive are made according to JIS standard K.
According to 7113, it has a tensile elongation in the range of 100 to 300%. Thus, in the present invention, the anchor by the above-described anchor coating agent is used.
The tensile elongation of the coating agent layer and / or the laminating adhesive layer by the laminating adhesive, and the inorganic and organic properties of the silane coupling agent as described above; Utilizing a coating thin film made of a polyurethane resin composition, a thin film of an inorganic oxide,
This improves the tight adhesion with the conductive resin layer, thereby preventing the occurrence of cracks and the like in the inorganic oxide thin film and increasing the laminating strength and the like. In the above, when the tensile elongation is less than 100%, the flexibility as a laminate material is lost, and cracks and the like are easily generated in a thin film of the inorganic oxide, which is not preferable. %, The adhesive strength as an anchor coating agent or an adhesive for laminating is not sufficient, and the required laminating strength is hardly exhibited, which is not preferable. It is.

Next, in the present invention, the heat-sealing resin forming the heat-sealing resin layer constituting the liquid pouch package includes a resin which can be melted by heat and fused to each other. Films or sheets can be used, and specifically, for example, low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear (linear) low-density polyethylene, polypropylene, ethylene-vinyl acetate copolymer Coalescence, ionomer resin, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-
Methacrylic acid copolymer, ethylene-methyl methacrylate copolymer, ethylene-propylene copolymer, methylpentene polymer, polybutene polymer, polyolefin resin such as polyethylene or polypropylene, acrylic acid, methacrylic acid, maleic acid, anhydride Films of resin such as acid-modified polyolefin resin modified with unsaturated carboxylic acid such as maleic acid, fumaric acid, itaconic acid, polyvinyl acetate resin, poly (meth) acrylic resin, polyvinyl chloride resin, etc. Alternatively, a sheet can be used. Thus, the above-mentioned film or sheet can be used in a state of a coating film of a composition containing the resin. The thickness of the film, film or sheet is preferably about 5 μm to 300 μm, and more preferably about 10 μm to 100 μm.

Further, in the present invention, the base film forming the base film layer constituting the liquid pouch package is, for example, a basic material when forming a packaging container, and therefore, it is a mechanical material. It has excellent properties in physical, chemical, etc., and in particular, a resin film or sheet having strength, toughness, and heat resistance can be used. For example, polyester resins, polyamide resins, polyaramid resins, polyolefin resins, polycarbonate resins, polystyrene resins, polyacetal resins, fluorine resins,
Other tough resin films or sheets, etc. can be used. Thus, as the resin film or sheet, any one of an unstretched film and a stretched film stretched in a uniaxial or biaxial direction can be used. The thickness of the film is about 5 μm to 100 μm, preferably about 10 μm to 50 μm. In the present invention, the base film as described above is subjected to, for example, front printing or back printing by printing a desired printing pattern such as a character, a figure, a symbol, a picture, or a pattern by a normal printing method. It may be.

Next, in the present invention, as the base film constituting the base film layer, for example, various paper base materials constituting the paper layer can be used. In the present invention, the paper substrate is provided with moldability, bending resistance, rigidity, etc., for example, strong size bleached or unbleached paper substrate, or pure white roll paper,
Paper base materials such as kraft paper, paperboard, and processed paper, and the like can be used. In the above, as the paper base material constituting the paper layer, it is desirable to use a base material having a basis weight of about 80 to 600 g / m ² , preferably a base weight of about 100 to 450 g / m ² . Needless to say, in the present invention, a paper base constituting the paper layer and various resin films or sheets as the base films mentioned above can be used in combination.

Next, in the present invention, as a material constituting the liquid pouch package according to the present invention, for example, steam,
Film or sheet of resin such as low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-density polyethylene, polypropylene, ethylene-propylene copolymer or the like having a barrier property against water, or oxygen, water vapor Film or sheet of resin such as polyvinylidene chloride, polyvinyl alcohol, saponified ethylene-vinyl acetate copolymer, etc. having a barrier property against the like, a coloring agent such as a pigment in the resin, and other desired additives And various kinds of colored resin films or sheets having a light-shielding property formed by kneading and kneading to form a film can be used. These materials can be used alone or in combination of two or more. The thickness of the above-mentioned film or sheet is arbitrary, but usually 5 μm to 3 μm.
It is preferably about 00 μm, more preferably about 10 μm to 100 μm.

In the present invention, since the liquid pouch is usually subjected to severe physical and chemical conditions, strict packaging suitability is required for the laminated material constituting the liquid pouch. , Deformation prevention strength, drop impact strength, pinhole resistance, heat resistance, sealability, quality maintenance, workability, hygiene, etc., and various other conditions are required. Materials satisfying the above conditions can be arbitrarily selected and used, and specifically, for example, low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-density polyethylene, polypropylene, ethylene -Propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid or methacrylic acid copolymer, Chillpentene polymer, polybutene resin, polyvinyl chloride resin, polyvinyl acetate resin, polyvinylidene chloride resin, vinyl chloride-vinylidene chloride copolymer, poly (meth) acrylic resin, polyacrylonitrile resin, Polystyrene resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), polyester resin, polyamide resin, polycarbonate resin, polyvinyl alcohol Resin, saponified ethylene-vinyl acetate copolymer, fluororesin,
It can be arbitrarily selected from known resin films or sheets such as diene resins, polyacetal resins, polyurethane resins, nitrocellulose and others. In addition, for example, a film such as cellophane, synthetic paper, or the like can be used. In the present invention, the above-mentioned film or sheet can be used in any of unstretched and uniaxially or biaxially stretched. The thickness is arbitrary, but is from several μm to 3 μm.
It can be used by selecting from a range of about 00 μm.
Further, in the present invention, the film or sheet may be any film such as an extruded film, an inflation film, or a coating film.

Next, a method of manufacturing a laminated material using the above-mentioned materials in the present invention will be described.
For example, a wet lamination method, a dry lamination method, a solventless dry lamination method, an extrusion lamination method, a T-die extrusion molding method, a co-extrusion lamination method, an inflation method, It can be performed by an extrusion inflation method or the like. Thus, in the present invention, when performing the above-mentioned lamination, if necessary, a pretreatment such as a corona treatment or an ozone treatment can be performed on the film, and for example, an isocyanate-based (urethane) Series), polyethyleneimine series, polybutadiene series, organic titanium series etc.
Known pretreatments such as coating agents or adhesives for laminating such as polyurethane, polyacrylic, polyester, epoxy, polyvinyl acetate, cellulose, etc., anchor coating Agents, adhesives and the like can be used.

Next, in the present invention, a method for producing a liquid pouch by making a bag using the above-described laminated material will be described. For example, using the laminated material produced by the above-described method, The heat-sealing resin layer of the inner layer is opposed to the surface, and the heat-sealing resin layer is folded, or the two sheets are overlapped, and the peripheral edge is heat-sealed to form a seal portion. Provided to produce a liquid pouch. Thus, as a bag-making method, the above-mentioned laminated material is bent with its inner layer facing the surface, or two of them are overlapped, and the peripheral end of the outer periphery is further sealed with, for example, a side sheet. Seal type, two-way seal type, three-way seal type, four-way seal type, envelope-attached seal type, gasket-attached seal type (pyro-seal type),
Heat seals such as pleated seal type, flat bottom seal type, square bottom seal type, etc. to manufacture liquid sachets of various forms according to the present invention. can do. In addition, for example, a self-standing packaging bag (standing pouch) or the like can be manufactured. In the present invention, a tube container or the like can also be manufactured using the above-described laminated material. In the above, as a method of heat sealing, for example, a bar seal, a rotating roll seal,
It can be carried out by a known method such as a belt seal, an impulse seal, a high-frequency seal, an ultrasonic seal, and the like. In the present invention, for example, the above-mentioned liquid sachet includes
A spout of one-piece type, two-piece type, etc., or a zipper for opening and closing can be arbitrarily attached.

Next, when the liquid sachet includes a paper base material, for example, a laminated material in which a paper base material is laminated is produced as a laminated material, and a blank plate for producing a desired paper container is produced therefrom. And then, using the blank plate, the trunk,
By manufacturing the bottom, the head, and the like, for example, a liquid paper container of a brick type, a flat type, or a gable-top type can be manufactured. Moreover, the shape can be manufactured by any of a rectangular container, a circular or other cylindrical paper can, and the like.

In the present invention, the liquid sachet produced as described above may be a seasoning or a soy sauce, a soup, a broth, a spice, a cooking liquor, or other liquid or viscous body. It can be packed with various liquid or viscous foods and drinks such as foods, juices and others. Furthermore, the liquid pouch according to the present invention is used for filling and packaging various articles such as chemicals such as adhesives and adhesives, cosmetics, pharmaceuticals, and the like, in addition to the above-mentioned food and drink. It is. Thus, the liquid pouch according to the present invention uses a resin film having a thin film of an inorganic oxide as a barrier material, and further includes a resin film having a thin film of an inorganic oxide as the barrier material. When laminating a film of another resin such as a heat-sealing resin layer, a coating thin film made of a polyurethane-based resin composition containing a silane coupling agent and a filler, and an anchor coat By using an agent layer and / or an adhesive layer for laminating, the laminating strength between the layers can be remarkably increased, and as a result, it has strength and is excellent in various fastnesses.
It is excellent in barrier properties against oxygen gas, water vapor and the like, and does not impair the flavor and taste of the contents during storage, storage or distribution. Furthermore, in the present invention, after using the liquid pouch package, the liquid pouch, for example,
It has the advantage that it can prevent the generation of harmful gases such as chlorine gas even when it is disposed of as garbage and burned, and can manufacture a liquid pouch package suitable for extremely excellent environmental protection. It is.

[0030]

EXAMPLES The present invention will be described more specifically with reference to examples. Example 1 A 300 μm-thick silicon oxide vapor-deposited film was formed on one surface of a biaxially stretched nylon film having a thickness of 15 μm by plasma enhanced chemical vapor deposition. As a ring agent, γ-glycidoxypropyltrimethoxysilane, 0.8% by weight, as a filler, silica particles, 1.0% by weight, polyurethane resin,
13 to 15% by weight, cellulose resin, 3 to 4% by weight,
Toluene, 31 to 32% by weight, methyl ethyl ketone (M
EK), 29 to 30% by weight, isopropyl alcohol (IPA), 15 to 16% by weight of a polyurethane resin composition is coated by a gravure roll coating method, and then dried to obtain a thick layer. A coating thin film having a thickness of 0.5 g / m ² (dry state) was formed. Next, the above
A polyurethane-based anchor coating agent was coated on the thin coating in the same manner as described above to form an anchor coating agent layer having a thickness of 0.5 g / m ² (dry state). . Further, on the anchor coating agent layer,
Ethylene / α-olefin copolymer polymerized using a gray catalyst (LLDPE, MI = 8.0, density = 0.
While 911) was melt-extruded, the surface of the melt-extruded resin was subjected to extrusion processing by an extrusion method while performing ozone treatment to form an adhesive layer having a thickness of 20 μm.
Next, on the adhesive layer, an ethylene / α-olefin copolymer (LLDPE, MI = 7.3, density = 0.900) 80 polymerized by a single-site catalyst was used.
A blend consisting of 20% by weight of an ethylene / butene copolymer (MI = 3.5, density = 0.885, butene content 20%) is melted at an extrusion temperature of 290 ° C. and a processing speed of 100 m / min. Extrusion coating was performed to form a heat-sealing resin layer having a thickness of 20 μm, thereby producing a laminated material having the following layer structure. 15 μm thick biaxially stretched nylon film / thickness 300 mm. Vapor deposited silicon oxide film / 0.5 g / m ² · coating thin film / 0.5 g / m ² · anchoring agent layer / Thickness 20μm
Adhesive layer / thickness 20 μm / heat-sealing resin layer In the above, a 300 μm thick silicon oxide vapor-deposited film was formed on one side of a 15 μm-thick biaxially stretched nylon film by plasma enhanced chemical vapor deposition. 12μm thick instead of forming
The biaxially stretched polyethylene terephthalate film is used. On one side of the film, a vacuum evaporation apparatus is used to evaporate the aluminum metal. A deposited film of aluminum oxide having a thickness of 300 ° was formed, and a laminated material having the following layer structure was manufactured in the same manner as in Example 1 described above. 12 μm thick biaxially stretched polyethylene terephthalate film / thickness 300 mm. Vapor deposited film of aluminum oxide / thickness 0.5 g / m ² .coating thin film / thickness 0.5 g / m.
^2. Anchor coating agent layer / thickness 20μm ・ Adhesive layer / thickness 20μm ・ heat-sealing resin layer

Example 2 In Example 1, an ethylene / α-olefin copolymer (LLDPE, MI = 7.3, density = 0.90) polymerized with a single-site catalyst was formed on the adhesive layer.
0) 80% by weight of ethylene / butene copolymer (MI =
3.5, density = 0.885, butene content 20%) 20
% By weight at an extrusion temperature of 290
Instead of forming a heat-sealable resin layer having a thickness of 20 μm by melt-extrusion coating at 100 ° C. and a processing speed of 100 m / min, the inflation method is used by using the same blend as above. Then, using the heat-sealing resin film thus formed, the adhesive layer was laminated on the above-mentioned adhesive layer by a dry lamination method. Laminated material was manufactured. In place of the polyurethane-based anchor coating agent in Example 1 described above, a polyurethane-based adhesive for laminating was similarly used, and coated in the same manner as in Example 1 described above. An adhesive layer for lamination having a thickness of 4.0 g / m ² (dry state) was formed. 3. 15 μm thick biaxially stretched nylon film / 300 mm thick. Vapor deposited film of silicon oxide / 0.5 g / m ² thickness.
0 g / m ² · Laminate adhesive layer / thickness 20 µm · Adhesive layer / thickness 20 µm Heat-sealing resin layer

COMPARATIVE EXAMPLE 1 Instead of forming a 300-mm-thick silicon oxide vapor-deposited film on one surface of a 15 μm-thick biaxially stretched nylon film by plasma-enhanced chemical vapor deposition in the above-described Example 1, the thickness was changed. A biaxially stretched nylon film having a thickness of 15 μm is coated on one side with a composition containing a polyvinylidene chloride resin.
Forming a coating film and then forming a coating thin film of the polyurethane resin composition described in Example 1 were omitted, and a lamination having the following layer configuration was performed in the same manner as in Example 1 above. Lumber was manufactured. Polyvinylidene chloride resin coat thickness 15 μm, biaxially stretched nylon film / thickness 0.5 g / m ² , anchor coating agent layer / thickness 20 μm, adhesive layer / thickness 20 μm -Sealing resin layer

Comparative Example 2 In Example 1, the formation of the coating thin film of the polyurethane resin composition was omitted, and other than that, the following layer structure was used in the same manner as in Example 1 above. A laminated material was manufactured. 15 μm thick biaxially stretched nylon film / thickness 300 mm. Vapor deposited silicon oxide film / 0.5 g / m ² thickness. Anchor coating agent layer / 20 μm thickness.
Adhesive layer / thickness 20 µm / heat-sealing resin layer

EXPERIMENTAL EXAMPLE 1 A laminate strength test and a heat seal strength test were performed on the laminates manufactured in Examples 1 and 2 and the laminates manufactured in Comparative Examples 1 and 2 above. . The above laminate strength test was performed using a peeling tester (Orientec Co., Ltd.
Model name, Tensilon universal testing machine), sample 15m
A laminating strength test was performed under the conditions of m width, peeling angle of 90 °, load cell of 5 kgf, peeling speed of 50 mm / min, distance between fulcrums of 50 mm, and peeling method of T-shaped peeling. Also,
Heat seal strength is 140 ° C x 1 kg / c in seal condition.
m ² × 1 second, using the peel tester described above, sample 1
5 mm width, load cell, 20 kgf, peeling speed, 300
A heat seal strength test was performed under the conditions of mm / min, distance between supports, 50 mm, and T-shaped peeling. The results are shown in Table 1 below.

[0035]

[Table 1]

As shown in Table 1 above, the laminates of Examples 1 and 2 have significantly higher laminating strengths than those of Comparative Examples 1 and 2, and especially those of Comparative Example 2. It has been found that peel strength is improved by forming a coating thin film of a polyurethane resin composition. In addition,
In the case of Comparative Example 1, since a coating film of a polyvinylidene chloride-based resin composition is formed, if it is disposed of as garbage after use and incinerated, there is a concern that chlorine gas will be generated, and it is suitable for environmental measures. is not.

EXPERIMENTAL EXAMPLE 2 Next, a tear test was performed on the laminated materials manufactured in Examples 1 and 2 and the laminated materials manufactured in Comparative Examples 1 and 2 described above. In the above-mentioned tearing test, a cut of 5 mm was made at the end of the laminated material, and the laminated material was torn by hand in dry (in air) and wet (in water), respectively, and the tear feeling was evaluated. The results are shown in Table 2 below.

[0038]

[Table 2] In Table 2 above, the point of view of the tearing property is that ○ indicates that the tear is clean, Δ indicates that the string is torn with some stringing, and X indicates that the heat-sealing resin layer is stretched and does not tear. It represents that.

As shown in Table 2 above, the tearability of Examples 1-2 was better than those of Comparative Examples 1-2, especially those of Comparative Example 2. In the case of Comparative Example 1, since a coating film formed of a composition containing a polyvinylidene chloride-based resin is formed, if it is discarded as garbage after use and incinerated, there is a concern that chlorine gas will be generated. Not suitable for response.

EXPERIMENTAL EXAMPLE 3 Further, the laminated materials produced in Examples 1 and 2 and the laminated materials produced in Comparative Examples 1 and 2 described above, The following data
Was measured. (1). Measurement of Oxygen Permeability This is a condition of 23 ° C. and 90% RH in the United States.
The measurement was carried out using a measuring instrument (model name, OXTRAN) manufactured by MOCON. (2). Measurement of Water Vapor Permeability This is a condition of a temperature of 40 ° C. and a humidity of 100% RH.
Matran (PERMATRAN)]. The above measurement results are shown in Table 3 below.

[0041]

[Table 3] In Table 3 above, “Gelvo (25 times)” means a value after the Gelbo Flex test, which was measured using a sheet after performing the flex test 25 times with a Gelbo Flex tester. The term "after the liquid filling machine" means that the liquid package is used to measure the package immediately after being sealed in an empty bag in the form of a liquid sachet using a liquid filling and packaging machine, Further, "after pyro-wrapping" refers to the result of measuring the package after performing sealing with empty bags using a vertical pyro- or horizontal pyro-filling machine. In Table 3, the oxygen permeability is in units of cm ³ / m ² / day · 23 ° C./90% RH, and the water vapor permeability is g / m ² / day · 4
It is a unit of 0 ° C. and 100% RH.

As is clear from the results shown in Table 3 above, those of Examples 1 and 2 were excellent in oxygen permeability and water vapor permeability, whereas those of Comparative Examples 1 to 2 were excellent.
Both of the two were inferior.

[0043]

As apparent from the above description, the present invention focuses on a resin film having a thin film of an inorganic oxide as a barrier material, and furthermore, a thin film of an inorganic oxide as the barrier material. For example, a resin film having
When laminating a film of another resin such as a sealing resin layer, a polyurethane resin composition containing a silane coupling agent and a filler, and further an adhesive for an anchor coating agent and / or a laminate. Focusing on using an agent, first, a thin film of an inorganic oxide is provided on one surface of a flexible plastic substrate, and a silane coupling agent and a filler are further provided on the thin film of the inorganic oxide. A coating thin film of a polyurethane-based resin composition containing: an anchor coating agent layer by an anchor coating agent or a laminating adhesive layer by a laminating adhesive; Next, a heat-sealing resin layer is laminated to form a laminated material, and the laminated material is overlapped with the heat-sealing resin layer surface facing the end portion of the outer periphery. Heat seal to provide a heat seal part. The bag body is further filled with a seasoning or the like consisting of a liquid or viscous body from the opening of the bag body to produce a liquid small bag package, which has strength and excellent robustness. Furthermore, it is excellent in barrier properties against oxygen gas, water vapor, etc., and has excellent laminating strength, and does not impair the flavor and taste of the contents during storage, storage or distribution, and It is also possible to manufacture a liquid pouch package having suitability for incineration even when disposed of as waste after use.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a layer configuration of an example of a laminated material constituting a liquid pouch package according to the present invention.

FIG. 2 is a schematic cross-sectional view showing a layer structure of an example of a laminated material constituting a liquid pouch package according to the present invention.

FIG. 3 is a schematic perspective view showing a configuration of a liquid pouch made using the laminated material shown in FIG.

FIG. 4 is a schematic perspective view showing a configuration of a liquid pouch made using the laminated material shown in FIG.

FIG. 5 is a schematic perspective view showing the configuration of a liquid pouch package according to the present invention in which contents are filled and packaged in the liquid pouch shown in FIG. 3;

FIG. 6 is a schematic perspective view showing the configuration of a liquid pouch package according to the present invention in which contents are filled and packed in the liquid pouch shown in FIG. 3;

FIG. 7 is a schematic configuration diagram illustrating an example of a roll-up type vapor deposition machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Flexible plastic base material 2 Inorganic oxide thin film 3 Coating thin film 4 Anchor coating agent layer by an anchor coating agent and / or a laminating adhesive layer by a laminating adhesive Reference Signs List 5 heat sealable resin layer 6 base film layer 7 seal 8 opening 9 contents 10 upper seal 11 opening cut 111 vacuum chamber 112 unwinding roll 113 flexible plastic Substrate 114 Coating drum 115 Vapor deposition chamber 116 Crucible 117 Oxygen outlet 118 Mask 119 Take-up roll A Laminated material B Laminated material C Liquid sachet D Liquid sachet E Liquid sachet package F Liquid sachet package

Claims (8)

[Claims] 1. A method according to claim 1, wherein one side of the flexible plastic substrate is
At least a polyurethane resin composition containing a thin film of an inorganic oxide, a silane coupling agent and a filler.
Coating thin film, anchor coating agent layer with anchor coating agent and / or laminating with laminating adhesive
The heat-sealing adhesive layer and the heat-sealing resin layer are sequentially laminated to form a laminated material, and the laminated material is superposed with the heat-sealing resin layer surface facing the heat-sealing resin layer. A heat seal is provided at the end around the outer periphery to provide a heat seal portion to form a bag, and the bag is filled with a liquid or a viscous body from its opening to form a bag. A liquid pouch package, comprising: 2. The other side of the flexible plastic substrate,
2. The liquid pouch package according to claim 1, further comprising a base film laminated thereon. 3. The method according to claim 1, wherein the flexible plastic substrate comprises a biaxially oriented nylon film or a biaxially oriented polyethylene terephthalate film.
Or a liquid pouch package according to 2. 4. The liquid pouch package according to claim 1, wherein the inorganic oxide thin film comprises an inorganic oxide vapor-deposited film. 5. The liquid pouch package according to claim 1, wherein the inorganic oxide thin film comprises an inorganic oxide vapor-deposited film formed by a chemical vapor deposition method. 6. The liquid pouch package according to claim 1, wherein the inorganic oxide vapor-deposited film comprises a silicon oxide or aluminum oxide vapor-deposited film. 7. The package according to claim 1, wherein the filler comprises silica particles. 8. An anchor coating agent layer using an anchor coating agent and / or a laminating agent using a laminating adhesive.
Adhesive based on JIS K7113.
The liquid pouch package according to claim 1, 2, 3, 4, 5, or 6, having a tensile elongation in the range of 00 to 300%.