CN114269660A - Packaging bag for microwave oven - Google Patents
Packaging bag for microwave oven Download PDFInfo
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- CN114269660A CN114269660A CN202080059695.4A CN202080059695A CN114269660A CN 114269660 A CN114269660 A CN 114269660A CN 202080059695 A CN202080059695 A CN 202080059695A CN 114269660 A CN114269660 A CN 114269660A
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- paper
- microwave oven
- barrier layer
- packaging bag
- packaging material
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- 238000004806 packaging method and process Methods 0.000 title claims abstract description 45
- 230000004888 barrier function Effects 0.000 claims abstract description 51
- 239000005022 packaging material Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 239000000758 substrate Substances 0.000 claims abstract description 8
- 239000003973 paint Substances 0.000 claims abstract description 3
- 230000002093 peripheral effect Effects 0.000 claims abstract description 3
- 239000003292 glue Substances 0.000 claims abstract 2
- 238000012856 packing Methods 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 abstract description 8
- 239000004033 plastic Substances 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000000123 paper Substances 0.000 description 53
- 239000010410 layer Substances 0.000 description 40
- 239000000565 sealant Substances 0.000 description 15
- 239000011248 coating agent Substances 0.000 description 12
- 238000000576 coating method Methods 0.000 description 12
- 229920001131 Pulp (paper) Polymers 0.000 description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 8
- 229920001577 copolymer Polymers 0.000 description 6
- 239000000945 filler Substances 0.000 description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
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- 239000011347 resin Substances 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- 229920003169 water-soluble polymer Polymers 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 240000000797 Hibiscus cannabinus Species 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000005021 flexible packaging material Substances 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 239000005001 laminate film Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/01—Ventilation or drainage of bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/10—Container closures formed after filling
- B65D77/12—Container closures formed after filling by collapsing and flattening the mouth portion of the container and securing without folding, e.g. by pressure-sensitive adhesive, heat-sealing, welding or applying separate securing members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Food Science & Technology (AREA)
- Package Specialized In Special Use (AREA)
- Bag Frames (AREA)
- Packages (AREA)
Abstract
Provided is a packaging bag for a microwave oven, which can greatly reduce plastic materials having a large environmental load. A packaging bag for a microwave oven, which is formed into a bag shape by heat-sealing a peripheral edge portion of a packaging material and has a steam seal portion. In the paper packaging material, the thickness of the paper base material is 50% or more of the entire thickness. The thickness of the paper base material is 30-250 μm. The paper packaging material has a water vapor barrier layer on the surface of a paper substrate. The water vapor barrier layer is formed by applying a water-based paint. The paper packaging material has a gas barrier layer, and a water vapor barrier layer and a gas barrier layer are formed on a paper base material in this order. The paper packaging material may also have a layer of sealing glue.
Description
Technical Field
The present invention relates to a packaging bag for a microwave oven, which has a steam outlet seal portion that can be rapidly ruptured when the internal pressure rises due to microwave heating.
Background
In a packaging bag for a microwave oven comprising a film, there has been proposed a technique in which the internal vapor pressure is increased by heating, and a part of the film is automatically peeled off to discharge the vapor (see patent document 1).
Patent document 1 discloses a packaging bag for a microwave oven sealed by heat-sealing a plastic film. A branch part (flap) which can be laid down is arranged on one side surface of the packaging bag for the microwave oven. The branch part is provided with a steam outlet sealing part which can automatically peel off the film due to the rise of internal steam pressure caused by heating.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2005-320023
Disclosure of Invention
(problems to be solved by the invention)
In the packaging bag for microwave ovens, a plastic film is widely used as a packaging material which is required to have properties such as steam impermeability and excellent sealing property. Plastic films are readily available and are readily formed into bags by heat sealing.
However, with recent increased attention to environmental issues, the reduction of the use of plastics has been more and more called, and the packaging bag for microwave ovens has not been exceptional.
The present invention has been made in view of the above-mentioned conventional circumstances, and an object thereof is to provide a packaging bag for a microwave oven, which can reduce a plastic material having a large environmental load as much as possible.
(means for solving the problems)
In order to achieve the above object, a microwave oven packaging bag according to the present invention is a microwave oven packaging bag formed in a bag shape by heat-sealing a peripheral edge portion of a packaging material, and having a steam-sealed portion, the microwave oven packaging bag comprising: the thickness of the paper base material of the paper packaging material is more than 50% of the whole thickness.
By using a paper packaging material mainly composed of a paper base material as a packaging material for forming a packaging bag for a microwave oven, the use of plastics can be greatly reduced. In particular, when the thickness of the paper base material is 50% or more of the entire thickness, the effect of reducing the amount of plastic (petroleum derivative) is large.
(effect of the invention)
According to the present invention, a packaging bag for a microwave oven, which can greatly reduce a plastic material having a large environmental load, can be provided.
Drawings
Fig. 1 is a perspective view showing an example of a packaging bag for a microwave oven.
Fig. 2 shows another example of the packaging bag for a microwave oven, specifically, an enlarged view of the vicinity of the steam outlet seal portion of the packaging bag for a microwave oven.
Detailed Description
Next, an embodiment of a packing bag for a microwave oven using the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1, a packaging bag 1 for a microwave oven according to the present embodiment is formed in a bag shape from a flexible packaging material 9. A packaging bag 1 for a microwave oven is provided with a front surface part 2 and a rear surface part 3. The front surface portion 2 and the rear surface portion 3 are heat seal-welded at the seal portion 4. The seal 4 includes a top seal 4t formed along the upper side 1t of the packaging bag 1 and a side seal 4s formed along the right side 1r or the left side 1 l. The lower side 1b of the packaging bag 1 is not welded before the contents are stored, and is welded to form a bottom seal portion 4b after the contents are stored in the packaging bag 1 for a microwave oven. Thus, the sealing portion 4 is formed around the packaging bag 1 for a microwave oven, thereby sealing the inside of the packaging bag 1 for a microwave oven.
The packaging bag for the microwave oven is mainly characterized in that: the packaging material 9 is a paper packaging material mainly composed of a paper base material.
The paper substrate is single-or multi-ply paper which can be produced by a general production method and is a sheet composed of pulp, fillers and various auxiliaries. As the pulp, chemical pulp such as kraft pulp and sulfate pulp, mechanical pulp such as stone mill pulp and thermomechanical pulp, non-wood fibers made of kenaf, bamboo, hemp and the like, and the like can be used, and these pulps may be suitably mixed and used, and among them, chemical pulp is preferably used.
As the filler, known fillers such as talc, kaolin, clay, heavy calcium carbonate, light calcium carbonate, titanium oxide, zeolite, white carbon, synthetic resin filler, and the like can be used. If necessary, an internal additive for papermaking such as aluminum sulfate, various anionic, cationic, nonionic or amphoteric yield improvers, drainability improvers, paper strength improvers and internal sizing agents may be used. Further, dyes, fluorescent brighteners, pH adjusters, defoamers, pitch control agents, slime control agents, and the like may be added as necessary.
As the paper base material, for example, it can be produced by dispersing wood pulp (chemical pulp, mechanical pulp), non-wood pulp, waste paper pulp, etc. and if necessary, a filler or other chemicals in water to prepare a paper material, spraying the paper material on a wire of a paper machine, and then dehydrating and drying the paper material. Further, in order to impart strength and water resistance, the surface of paper may be treated with a size press or the like, or matte treatment may be applied thereto to adjust unevenness of the paper surface, by using a chemical such as various polyvinyl alcohols, various starches, and surface sizing agents alone or in combination of two or more kinds as required.
When a paper packaging material mainly composed of a paper base material is used as the packaging material 9, leakage of water vapor and securing of sealability become major problems. Therefore, in the present invention, a paper packaging material is used in which a water vapor barrier layer is provided on the surface of a paper base material.
Examples of the water vapor barrier resin used in the water vapor barrier layer include various copolymers such as styrene/butadiene copolymers, styrene/acrylic copolymers, ethylene/vinyl acetate copolymers, butadiene/methyl methacrylate copolymers, vinyl acetate/butyl acrylate copolymers, maleic anhydride copolymers, acrylic acid/methyl methacrylate copolymers, and polyamide resins, and two or more of these may be used alone or in combination. In addition, a water-soluble polymer such as polyvinyl alcohol may be used in combination with the above-mentioned resin as long as the water vapor barrier property is not a problem and the function can be normally exhibited.
At the same time, pigments may also be contained in the water vapor barrier layer. Examples of the pigment include inorganic pigments such as kaolin, clay, ground calcium carbonate, light calcium carbonate, talc, titanium dioxide, barium sulfate, calcium sulfate, zinc oxide, silicic acid, silicates, colloidal silica and the like, and organic pigments, and two or more of these pigments may be used alone or in combination.
The water vapor barrier layer can be formed by preparing and applying a water-based paint containing the water vapor barrier resin and the like described above. The method for coating the water vapor barrier layer is not particularly limited, and a known coating apparatus can be used. Specific examples thereof include a blade coater, a bar coater, a roll coater, an air knife coater, a reverse roll coater, a curtain coater, a spray coater, a sizing pressure coater, a gate roll coater and the like.
The amount of the water vapor barrier layer to be applied is preferably 3g/m in terms of dry weight2Above 50g/m2The following are specifically 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50g/m2And may be within a range between any two of the numerical values recited herein. If the coating weight of the water vapor barrier layer is less than 3g/m2The gaps of the paper fibers cannot be sufficiently filled, and there occurs a case where sufficient water vapor barrier property cannot be obtained, or a gas barrier layer to be described later penetrates into the paper base material and sufficient gas barrier property cannot be obtained. On the other hand, if it is more than 50g/m2The drying time at the time of coating is long, and there is a possibility that a coating layer is cracked or the like.
The packaging bag 1 for a microwave oven of the present embodiment is mainly characterized in that: in the packaging material 9 used, the barrier property is imparted not by laminating a barrier film but by using a coating (coat). When the barrier film is used, the structure is paper/barrier film/sealant, and the thickness of the barrier film needs to have a certain thickness, so that the proportion of resin is increased, and the proportion of paper is difficult to reach more than 50%. In contrast, if the water vapor barrier layer is formed by coating as above, the structure is paper/water vapor barrier coating/(gas barrier coating /) sealant/, and a barrier film is not required, so that the proportion of paper can be made 50% or more. That is, when the water vapor barrier layer is formed by coating, the thickness of the water vapor barrier layer can be made thinner than that of the laminate film, and the ratio of the thickness of the paper substrate can be increased.
A gas barrier layer can be formed outside the water vapor barrier layer. The gas barrier layer may be formed of a water-soluble polymer, and examples of the water-soluble polymer include fully saponified polyvinyl alcohol, partially saponified polyvinyl alcohol, ethylene-polyvinyl alcohol copolymer, polyvinyl pyrrolidone, starch, methyl cellulose, carboxymethyl cellulose, and sodium alginate.
The amount of the gas barrier layer to be applied is preferably 0.2g/m in terms of dry weight2Above 20g/m2Hereinafter, it may be specifically 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20g/m2And may be within a range between any two of the numerical values recited herein. If the coating weight of the gas barrier layer is less than 0.2g/m2There is a possibility that the air resistance is insufficient. On the other hand, if it is more than 20g/m2The drying time during coating is long, and there is a possibility that the coating layer may be cracked. The method of applying the gas barrier layer is not particularly limited, and a known application apparatus can be used, as in the case of the conventional water vapor barrier layer.
In forming the gas barrier layer, it is preferable to coat the paper, the water vapor barrier layer, and the gas barrier layer in this order. This prevents the gas barrier layer from being deteriorated by moisture from the surface side.
Further, a sealant layer of polyethylene, polypropylene, polyvinyl acetate polymer or the like may be provided in the paper barrier packaging material in which the water vapor barrier layer or the gas barrier layer is provided on the paper base material as described above. Linear low density polyethylene is particularly preferred as the material of the sealant layer. Through setting up the sealant layer, can ensure paper packaging material's canned type. The method of laminating the sealant layer is not particularly limited, and conventional melt extrusion lamination, dry lamination using a film, direct melt coating, and the like can be used.
In the paper packaging material, the larger the proportion of paper, the more obvious the plastic reduction effect is. From such a viewpoint, the thickness of the paper base is preferably 50% or more of the entire thickness of the paper packaging material. In view of the formation of the water vapor barrier layer, the thickness of the paper base material is preferably 50% to 90% of the entire thickness of the paper packaging material, and may be specifically 50, 60, 70, 80, or 90%, or may be within a range between any two values exemplified herein. The weight of the paper substrate is preferably more than 50% of the total weight of the paper packaging material.
The overall thickness of the paper packaging material is preferably 250 μm or less and 50 μm or more, and more preferably 200 μm or less and 70 μm or more. The thickness of the paper substrate is preferably 250 μm or less and 30 μm or more, more preferably 200 μm or less and 50 μm or more, and further preferably 150 μm or less and 70 μm or more. If the thickness of the paper packaging material is too thick, there is a problem that smooth expansion is difficult when the paper packaging material is used as a packaging bag for microwave ovens. Further, if the thickness of the paper packaging material is too thick, there is a problem that it is difficult to form a bag. Particularly, when the bag has a flap (folded) shape, the bag is too thick, which makes it difficult to form the bag.
On the contrary, if the thickness of the paper base is thin, the sealant layer must be made thinner so as to satisfy the condition that the thickness of the paper base is 50% or more, and thus the bag cannot be manufactured. In addition, when a microwave oven is used, (when the package is heated in a sealed state), the sealant layer is easily peeled off during heating, and therefore the thickness of the sealant layer is 10 μm or more, preferably 20 μm or more, and the upper limit thereof is 100 μm.
When the thickness of the paper base material is within a range of 50% or more of the entire thickness, a film other than the sealant layer may be attached. For example, the film may be laminated on the outer side of the paper substrate, or the film may be laminated between the paper substrate and the sealant layer.
As shown in fig. 1, in the packaging bag 10 for a microwave oven of the present embodiment, the front surface portion 2 includes a front lower portion 2d and a front upper portion 2 u. The front lower portion 2d and the front upper portion 2u are welded to the rear surface portion 3, respectively. The front lower portion 2d and the front upper portion 2u are connected to each other at an overlapping portion (flap) 5 formed by overlapping in a folded state. As shown in fig. 1, the front lower portion 2d and the front upper portion 2u of the pair of side seal portions 6a, the pair of end seal portions 6b, and the steam outlet seal portion 6c are welded to the overlapping portion 5. The side seal portion 6a is provided at a position along the right side 1r and the left side 1l of the overlapping portion 5. The end seal portion 6b is provided such that the side seal portion 6a is connected to the steam outlet seal portion 6 c. The width of the end seal portion 6b gradually narrows from the side seal portion 6a toward the steam outlet seal portion 6 c. The inner edge 6c1 of the steam outlet seal 6c is bent substantially in a V shape toward the inside of the packaging bag 1. The notch 12 is provided at a position closer to the outside of the packaging bag 1 than the inner edge 6c1 and adjacent to the inner edge 6c 1.
When the packaging bag 1 for a microwave oven filled with contents is heated using a microwave oven, the internal pressure of the packaging bag 1 rises due to steam generated from moisture contained in the contents 11, which causes the seal in the vicinity of the substantially V-shaped front end of the steam seal portion 6c to be peeled off to form a steam flow path, and the steam is discharged to the outside through the steam flow path. The steam is discharged to the outside from the end of the overlapping portion 5 and the slit 12, respectively.
As described above, in the microwave oven packaging bag 10 of the present embodiment, since a paper packaging material mainly composed of a paper base material is used, the use of plastic can be significantly reduced. Further, by providing a water vapor barrier layer or a sealant layer on the surface of the paper base material, it is possible to prevent steam leakage and ensure sufficient sealing.
While the embodiments to which the present invention is applied have been described above, the present invention is not limited to the embodiments, and various modifications can be made without departing from the scope of the present invention.
For example, the structure, shape, and the like of the packaging bag for a microwave oven are not limited to the above embodiments, and the packaging bag for a microwave oven can be applied to all packaging bags for a microwave oven.
Further, as shown in fig. 2, by providing a spot seal (strong pressure seal) 6c2 in which the thickness of the sealant layer is thinner than the thickness of the other seal portion at the tip of the steam outlet seal portion, steam can be reliably discharged from the steam port. Further, by making the sealant layer of the steam sealing portion thinner, it is possible to facilitate peeling between the gas barrier layer and the sealant layer, and to stably discharge steam while ensuring sealability.
(symbol description)
1 packaging bag
2 front surface part
3 rear surface part
4 sealing part
5 overlapping part (flap)
6a side seal part
6b end seal
6c steam outlet sealing part
9 packaging the material.
Claims (7)
1. A packaging bag for a microwave oven, which is formed into a bag shape by fusing the peripheral edge portion of a paper packaging material and has a steam seal portion, characterized in that,
in the paper packaging material, the thickness of the paper base material is more than 50% of the whole thickness.
2. The packaging bag for a microwave oven according to claim 1, wherein,
the thickness of the paper base material is 30-250 μm.
3. The packaging bag for a microwave oven according to claim 1 or 2, wherein,
the surface of the paper substrate of the paper packaging material is provided with a water vapor barrier layer.
4. The packaging bag for a microwave oven according to claim 3, wherein,
the water vapor barrier layer is formed by applying a water-based paint.
5. The packaging material for microwave ovens according to claim 3 or 4,
the paper packaging material has a gas barrier layer, and a water vapor barrier layer and a gas barrier layer are formed on a paper base material in this order.
6. The microwave oven packing bag according to any one of claims 3 to 5, wherein,
the paper packaging material is provided with a sealing glue layer.
7. The packaging bag for a microwave oven according to any one of claims 1 to 6, wherein,
has a flap, and a steam seal is formed in the flap.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-180659 | 2019-09-30 | ||
| JP2019180659A JP7333501B2 (en) | 2019-09-30 | 2019-09-30 | Packaging bag for microwave oven |
| PCT/JP2020/036513 WO2021065762A1 (en) | 2019-09-30 | 2020-09-28 | Packaging bag for microwave oven use |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114269660A true CN114269660A (en) | 2022-04-01 |
| CN114269660B CN114269660B (en) | 2023-12-15 |
Family
ID=75272161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080059695.4A Active CN114269660B (en) | 2019-09-30 | 2020-09-28 | Packaging bag for microwave oven |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7333501B2 (en) |
| CN (1) | CN114269660B (en) |
| TW (1) | TW202114914A (en) |
| WO (1) | WO2021065762A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115108156A (en) * | 2022-07-04 | 2022-09-27 | 江苏省瑞达包装有限公司 | High-barrier packaging bag and production process thereof |
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| CN115108156A (en) * | 2022-07-04 | 2022-09-27 | 江苏省瑞达包装有限公司 | High-barrier packaging bag and production process thereof |
| CN115108156B (en) * | 2022-07-04 | 2023-09-15 | 江苏省瑞达包装有限公司 | Production process of high-barrier packaging bag |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021065762A1 (en) | 2021-04-08 |
| CN114269660B (en) | 2023-12-15 |
| JP7333501B2 (en) | 2023-08-25 |
| TW202114914A (en) | 2021-04-16 |
| JP2021054501A (en) | 2021-04-08 |
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