JP4258455B2 - Plastic pouch - Google Patents
Plastic pouch Download PDFInfo
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- JP4258455B2 JP4258455B2 JP2004244606A JP2004244606A JP4258455B2 JP 4258455 B2 JP4258455 B2 JP 4258455B2 JP 2004244606 A JP2004244606 A JP 2004244606A JP 2004244606 A JP2004244606 A JP 2004244606A JP 4258455 B2 JP4258455 B2 JP 4258455B2
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- Prior art keywords
- pouch
- film
- plastic
- folded
- opening mechanism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 229920003023 plastic Polymers 0.000 title claims description 50
- 239000004033 plastic Substances 0.000 title claims description 50
- 230000007246 mechanism Effects 0.000 claims description 33
- 230000002093 peripheral effect Effects 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 18
- 239000010408 film Substances 0.000 description 55
- 229920005989 resin Polymers 0.000 description 24
- 239000011347 resin Substances 0.000 description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- -1 polypropylene, propylene-ethylene copolymer Polymers 0.000 description 18
- 229920005992 thermoplastic resin Polymers 0.000 description 18
- 238000000034 method Methods 0.000 description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 16
- 229910052760 oxygen Inorganic materials 0.000 description 16
- 239000001301 oxygen Substances 0.000 description 16
- 238000004806 packaging method and process Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- 238000010411 cooking Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 8
- 229920006284 nylon film Polymers 0.000 description 8
- 229920006267 polyester film Polymers 0.000 description 8
- 239000004743 Polypropylene Substances 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000006096 absorbing agent Substances 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 229920001155 polypropylene Polymers 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 229920000954 Polyglycolide Polymers 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- 229920002125 Sokalan® Polymers 0.000 description 3
- FDLQZKYLHJJBHD-UHFFFAOYSA-N [3-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC(CN)=C1 FDLQZKYLHJJBHD-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 239000004584 polyacrylic acid Substances 0.000 description 3
- 239000004633 polyglycolic acid Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 description 2
- 229920002292 Nylon 6 Polymers 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 229920001179 medium density polyethylene Polymers 0.000 description 2
- 239000004701 medium-density polyethylene Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 150000003013 phosphoric acid derivatives Chemical group 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920005672 polyolefin resin Polymers 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 229920001634 Copolyester Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- CIWBSHSKHKDKBQ-DUZGATOHSA-N D-araboascorbic acid Natural products OC[C@@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-DUZGATOHSA-N 0.000 description 1
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 150000000996 L-ascorbic acids Chemical class 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical class ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 1
- 229920001893 acrylonitrile styrene Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 229920006164 aromatic vinyl copolymer Polymers 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 235000010350 erythorbic acid Nutrition 0.000 description 1
- 239000004318 erythorbic acid Substances 0.000 description 1
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 235000013611 frozen food Nutrition 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical group 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 229940087654 iron carbonyl Drugs 0.000 description 1
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 description 1
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 229940026239 isoascorbic acid Drugs 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000003504 photosensitizing agent Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920005606 polypropylene copolymer Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920000874 polytetramethylene terephthalate Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- SCUZVMOVTVSBLE-UHFFFAOYSA-N prop-2-enenitrile;styrene Chemical compound C=CC#N.C=CC1=CC=CC=C1 SCUZVMOVTVSBLE-UHFFFAOYSA-N 0.000 description 1
- 229920005653 propylene-ethylene copolymer Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000002639 sodium chloride Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 150000004764 thiosulfuric acid derivatives Chemical class 0.000 description 1
- 229930003799 tocopherol Natural products 0.000 description 1
- 239000011732 tocopherol Substances 0.000 description 1
- 125000002640 tocopherol group Chemical class 0.000 description 1
- 235000019149 tocopherols Nutrition 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Bag Frames (AREA)
- Package Specialized In Special Use (AREA)
Description
本発明は、パウチの表裏両面を構成するプラスチックフイルムの周縁部をヒートシールしてなる平パウチタイプのプラスチックパウチに関する。本発明のプラスチックパウチは、液状物、固形物或いはこれらの混合物からなるレトルト食品等の内容物を充填し、電子レンジ加熱調理用パウチとして好適に用いられる。 The present invention relates to a flat pouch type plastic pouch formed by heat-sealing the peripheral edge of a plastic film constituting both front and back surfaces of the pouch. The plastic pouch of the present invention is filled with contents such as a retort food made of a liquid, a solid or a mixture thereof, and is suitably used as a microwave cooking pouch.
レトルト食品、冷凍食品などを充填密封した包装袋を電子レンジで加熱すると、加熱に伴って内容物から発生する水蒸気等により袋内部の圧力が上昇し、包装袋が破裂して内容物が飛散するとともに、電子レンジ内を汚したり、人体に対してやけ等の危害を与えるおそれがある。 When a packaging bag filled and sealed with retort food, frozen food, etc. is heated in a microwave oven, the pressure inside the bag rises due to water vapor generated from the contents during heating, and the packaging bag bursts and the contents scatter. At the same time, the inside of the microwave oven may be soiled, or the human body may be burned.
このため、このような包装袋を電子レンジで加熱調理する前に、包装袋を予め部分的に開封しておいたり、包装袋本体に孔を開けることにより包装袋内で発生する水蒸気等を外部に排出し、包装袋の破袋を防止する方法がとられている。
しかしながら、このような方法は一般消費者にとっては手間のかかるものであるとともに、電子レンジ加熱により発生した水蒸気が直ちに包装袋外へ排出されるために、水蒸気による加熱蒸らし効果が低減し、食味が落ちるという欠点がある。
For this reason, before such a packaging bag is cooked in a microwave oven, the packaging bag is partially opened in advance, or water vapor generated in the packaging bag is generated by opening a hole in the packaging bag body. A method is taken to prevent the packaging bag from being broken.
However, such a method is time-consuming for general consumers, and since steam generated by microwave heating is immediately discharged out of the packaging bag, the steaming effect by steam is reduced and the taste is reduced. There is a drawback of falling.
このような問題点を解決するために、電子レンジ加熱時におけるパウチ内の内圧上昇を自動的に逃がすために、パウチの内圧上昇によって自動開口する機構を設けたプラスチックパウチが種々提案されている。
このような自動開口機構を設けたプラスチックパウチとしては、パウチを電子レンジ内で自立させて加熱するスタンディングパウチや（例えば、特許文献１、２参照）、平袋や分岐部に自動開口機構を設けた分岐型パウチのように包装袋を電子レンジ内で寝かせて加熱する平置き型パウチ等（例えば特許文献３〜５参照）、種々のタイプのものが知られている。
In order to solve such problems, various types of plastic pouches have been proposed that are provided with a mechanism that automatically opens when the internal pressure of the pouch rises in order to automatically release the increase of the internal pressure in the pouch during microwave heating.
As a plastic pouch provided with such an automatic opening mechanism, a standing pouch that heats the pouch by being self-supported in a microwave oven (for example, see Patent Documents 1 and 2), an automatic opening mechanism is provided in a flat bag or a branch part. Various types are known, such as a flat-type pouch that lays a packaging bag in a microwave oven and heats it like a branched pouch (see, for example, Patent Documents 3 to 5).
これらのパウチの中で、生産性やコストの点で最も優れているものは平パウチタイプのパウチであるが、このタイプのパウチは電子レンジでの調理時、及び内圧上昇によりパウチが自動開口した後に、自動開口機構の位置を高い位置に安定して保持することができないために、パウチの内容物が自動開口部から噴き出したり、漏れ出したりするという欠点があった。
このため、平パウチタイプの電子レンジ加熱調理用パウチの自動開口機構を高い位置に保持するために、個装箱等の補助具を使用することも提案されているが（特許文献６参照）、パウチとは別体の補助具を使用するので面倒であり、またコストアップにつながるという問題があった。
Among these pouches, the most excellent in terms of productivity and cost is a flat pouch type pouch, but this type of pouch is automatically opened when cooking in a microwave oven or when the internal pressure increases. Later, since the position of the automatic opening mechanism cannot be stably held at a high position, there is a drawback that the contents of the pouch are ejected from the automatic opening or leaked out.
For this reason, in order to hold the automatic opening mechanism of the flat pouch-type microwave heating cooking pouch at a high position, it has been proposed to use an auxiliary tool such as an individual packaging box (see Patent Document 6). There is a problem that it is troublesome because it uses an auxiliary tool separate from the pouch, and it leads to cost increase.
本発明は、上記従来技術の問題点を解消して、低コストで効率良く生産可能で、電子レンジ内に平置きして加熱調理する際に、補助具を使用せずに、パウチの内圧上昇により自動開口する自動開口機構の位置を高い位置に安定して保持することのできる、平パウチタイプのプラスチックパウチを提供することを目的とする。 The present invention eliminates the above-mentioned problems of the prior art, can be produced efficiently at low cost, and increases the internal pressure of the pouch without using an auxiliary tool when cooking horizontally and cooking in a microwave oven. An object of the present invention is to provide a flat pouch-type plastic pouch that can stably hold the automatic opening mechanism that automatically opens at a high position.
本発明者等は鋭意検討した結果、プラスチックパウチを構成する少なくとも一方のフイルムをパウチの幅方向全長にわたって折返し、周縁部をヒートシールしてパウチ本体と連通する折返し部を形成することによって上記課題が解決されることを発見し、本発明を完成したものである。 As a result of intensive studies, the inventors have turned back at least one film constituting the plastic pouch over the entire length in the width direction of the pouch, and heat-sealed the peripheral portion to form a folded portion communicating with the pouch body. The present invention has been completed by discovering that the problem is solved.
すなわち、本発明では次の１〜５の構成を採用する。
１．表面フイルム及び裏面フイルムにより構成したプラスチックパウチの裏面フイルムをパウチの幅方向全長にわたって折返し、周縁部をヒートシールすることによってパウチ本体と連通させて、電子レンジで加熱した際に自動的に開口する自動開口機構を設けた側のパウチ端部が立ち上がる起点となる折返し部を、前記端部側に折り返した時にその頂点が前記端部からパウチの内方側に離間した位置に配置されるように少なくとも１箇所形成し、前記自動開口機構を前記パウチ端部の周縁シール部に設けた先端がパウチ内方に向かう突出部として表面フイルム及び裏面フイルムを直接ヒートシールすることにより形成したことを特徴とするプラスチックパウチ。
２．表面フイルム及び裏面フイルムにより構成したプラスチックパウチの裏面フイルムをパウチの幅方向全長にわたって折返し、周縁部をヒートシールすることによってパウチ本体と連通させて、電子レンジで加熱調理した際に自動的に開口する自動開口機構を設けた側のパウチ端部が立ち上がる起点となる折返し部を、前記端部側に折り返した時にその頂点が前記端部からパウチの内方側に離間した位置に配置されるように少なくとも１箇所形成し、前記自動開口機構を前記パウチ端部の周縁シール部から分離した位置で、表面フイルム及び裏面フイルムを直接ヒートシールすることにより形成したことを特徴とするプラスチックパウチ。
３．折返し部をパウチの一方の端部寄りに形成したことを特徴とする１又は２に記載のプラスチックパウチ。
４．プラスチックパウチを構成するフイルムをＺ字形に折返すことによって折返し部を形成したことを特徴とする１〜３のいずれかに記載のプラスチックパウチ。
５．自動開口機構が弱化部を有する蒸気抜きシール部であることを特徴とする１〜４のいずれかに記載のプラスチックパウチ。
That is, in the present invention, the following configurations 1 to 5 are adopted.
1. The back surface film of the plastic pouch constructed in accordance with the surface film and back film folded across the width the entire length of the pouch, the peripheral edge portion by the pouch body and communicating by heat sealing, to automatically open when heated in a microwave oven automatically At least the folded portion, which is the starting point at which the end portion of the pouch provided with the opening mechanism rises, is arranged at a position spaced from the end portion to the inward side of the pouch when folded back to the end portion side. The automatic opening mechanism is formed in one place, and the front film provided on the peripheral seal part of the end part of the pouch is formed by directly heat-sealing the front film and the back film as a protruding part toward the inside of the pouch. Plastic pouch.
2. The back side film of the plastic pouch composed of the front side film and the back side film is folded back over the entire length in the width direction of the pouch, and the periphery is heat-sealed to communicate with the main body of the pouch and automatically opened when cooked in a microwave oven. When the folded portion that is the starting point where the end portion of the pouch provided with the automatic opening mechanism rises is folded back to the end portion side, the apex is arranged at a position spaced from the end portion to the inward side of the pouch. A plastic pouch formed by directly heat-sealing a front surface film and a back surface film at a position where at least one portion is formed and the automatic opening mechanism is separated from a peripheral seal portion at an end portion of the pouch.
3. 3. The plastic pouch according to 1 or 2, wherein the folded portion is formed near one end of the pouch.
4). 4. The plastic pouch according to any one of 1 to 3, wherein a folded portion is formed by folding a film constituting the plastic pouch into a Z shape .
5. 5. The plastic pouch according to any one of 1 to 4, wherein the automatic opening mechanism is a steam vent seal part having a weakened part .
本発明のプラスチックパウチは、スタンディングパウチや分岐型パウチのように追加の部材や工程を必要とせず、平パウチに近い低コストで効率良く生産することができる。また、電子レンジ内に平置きして加熱調理する際に、補助具を使用せずにパウチの内圧上昇により自動開口する自動開口機構の位置を高い位置に安定して保持し、開口部からの内容物の噴き出しや漏れ出しを防止することができる。 The plastic pouch of the present invention does not require an additional member or process unlike a standing pouch or a branched pouch, and can be efficiently produced at a low cost close to that of a flat pouch. In addition, when cooking horizontally in a microwave oven, the position of the automatic opening mechanism that automatically opens due to the increase in the internal pressure of the pouch without using an auxiliary tool is stably held at a high position, It is possible to prevent the contents from being blown out or leaked out.
本発明のプラスチックパウチを構成するプラスチックフイルムとしては、通常包装袋の製造に用いられるヒートシール性を有するプラスチック材料が使用される。このようなプラスチック材料としては、例えばヒートシール性を有する熱可塑性樹脂からなる単層のフイルム、シート類や、ヒートシール性を有する熱可塑性樹脂を他の熱可塑性樹脂等と積層した多層フイルム等が挙げられる。 As the plastic film constituting the plastic pouch of the present invention, a plastic material having heat sealing properties which is usually used for manufacturing a packaging bag is used. Examples of such a plastic material include a single-layer film made of a thermoplastic resin having heat-sealability, a sheet, a multilayer film in which a thermoplastic resin having heat-sealability is laminated with another thermoplastic resin, and the like. Can be mentioned.
このようなヒートシール性を有するプラスチック材料としては、例えば公知の低密度ポリエチレン、線状低密度ポリエチレン、中密度ポリエチレン、高密度ポリエチレン、ポリプロピレン、プロピレン−エチレン共重合体、エチレン−酢酸ビニル共重合体、エチレン系不飽和カルボン酸乃至その無水物でグラフト変性されたオレフィン樹脂等のオレフィン系樹脂、比較的低融点乃至低軟化点のポリアミド乃至コポリアミド樹脂、ポリエステル乃至コポリエステル樹脂、ポリカーボネイト樹脂等が使用される。 Examples of such a heat-sealable plastic material include known low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, high-density polyethylene, polypropylene, propylene-ethylene copolymer, and ethylene-vinyl acetate copolymer. Olefin resins such as olefin resins graft-modified with ethylenically unsaturated carboxylic acids or their anhydrides, polyamides or copolyamide resins having a relatively low melting point or low softening point, polyesters or copolyester resins, polycarbonate resins, etc. Is done.
また、ヒートシール性を有するプラスチック材料と積層する他のプラスチック材料としては、ヒートシール性を有し又は有さない熱可塑性樹脂からなるフイルムや各種バリアフイルム等を使用することができる。
このような熱可塑性樹脂としては、例えば結晶性ポリプロピレン、結晶性プロピレン−エチレン共重合体、結晶性ポリブテン−１、結晶性ポリ４−メチルペンテン−１、低−、中−、或いは高密度ポリエチレン、エチレン−酢酸ビニル共重合体（ＥＶＡ）、ＥＶＡケン化物、エチレン−アクリル酸エチル共重合体（ＥＥＡ）、イオン架橋オレフィン共重合体（アイオノマー）等のポリオレフィン類；ポリスチレン、スチレン−ブタジエン共重合体等の芳香族ビニル共重合体；ポリ塩化ビニル、塩化ビニリデン樹脂等のハロゲン化ビニル重合体；ポリアクリル系樹脂；アクリロニトリル−スチレン共重合体、アクリロニトリル−スチレン−ブタジエン共重合体の如きニトリル重合体；ポリエチレンテレフタレート、ポリテトラメチレンテレフタレート等のポリエステル類；各種ポリカーボネート；フッ素系樹脂；ポリオキシメチレン等のポリアセタール類等の熱可塑性樹脂を挙げることができる。これらの熱可塑性樹脂は単独で又は二種以上をブレンドして使用することができ、また、各種の添加剤を配合して使用してもよい。
Moreover, as another plastic material laminated | stacked with the plastic material which has heat-sealing property, the film which consists of a thermoplastic resin with or without heat-sealing property, various barrier films, etc. can be used.
Examples of such thermoplastic resins include crystalline polypropylene, crystalline propylene-ethylene copolymer, crystalline polybutene-1, crystalline poly-4-methylpentene-1, low-, medium-, or high-density polyethylene, Polyolefins such as ethylene-vinyl acetate copolymer (EVA), EVA saponified product, ethylene-ethyl acrylate copolymer (EEA), ion-crosslinked olefin copolymer (ionomer); polystyrene, styrene-butadiene copolymer, etc. Aromatic vinyl copolymers; vinyl halide polymers such as polyvinyl chloride and vinylidene chloride resins; polyacrylic resins; nitrile polymers such as acrylonitrile-styrene copolymers, acrylonitrile-styrene-butadiene copolymers; polyethylene Terephthalate, polytetramethylene terephthalate It can be exemplified thermoplastic resins such as polyacetal such as polyoxymethylene and the like; over polyesters such as preparative; various polycarbonates; fluorine-based resin. These thermoplastic resins can be used alone or in combination of two or more, and various additives may be blended and used.
また、各種バリアフイルムとしては、シリカ蒸着ポリエステルフイルム、アルミナ蒸着ポリエステルフイルム、シリカ蒸着ナイロンフイルム、アルミナ蒸着ナイロンフイルム、アルミナ蒸着ポリプロピレンフイルム、炭素膜蒸着ポリエステルフイルム、炭素膜蒸着ナイロンフイルム、さらにアルミナ及びシリカをポリエステルフイルムやナイロンフイルム等のベースフイルムに同時蒸着した２元蒸着フイルム、またナイロン６／メタキシリレンジアミンナイロン６共押出しフイルム、ポリプロピレン／エチレン−ビニルアルコール共重合体共押出しフイルム、またポリビニルアルコールコートポリプロピレンフイルム、ポリビニルアルコールコートポリエステルフイルム、ポリビニルアルコールコートナイロンフイルム、ポリアクリル酸系樹脂コートポリエステルフイルム、ポリアクリル酸系樹脂コートナイロンフイルム、ポリアクリル酸系樹脂コートポリプロピレンフイルム、ポリグリコール酸樹脂コートポリエステルフイルム、ポリグリコール酸樹脂コートナイロンフイルム、ポリグリコール酸樹脂コートポリプロピレンフイルム等の有機樹脂コートフイルム、さらに有機樹脂材料及び無機材料からなるハイブリッドコート材をポリエステルフイルムやナイロンフイルム、ポリプロピレンフイルム等のベースフイルムにコーティングしたもの等を挙げることができる。これらのバリアフイルムは、単独で又は２種以上を組合わせて使用することができる。 Various barrier films include silica-deposited polyester film, alumina-deposited polyester film, silica-deposited nylon film, alumina-deposited nylon film, alumina-deposited polypropylene film, carbon film-deposited polyester film, carbon film-deposited nylon film, and alumina and silica. Binary vapor-deposited film co-deposited on base film such as polyester film and nylon film, nylon 6 / metaxylylenediamine nylon 6 co-extruded film, polypropylene / ethylene-vinyl alcohol copolymer co-extruded film, and polyvinyl alcohol coated polypropylene Film, Polyvinyl Alcohol Coated Polyester Film, Polyvinyl Alcohol Coated Nylon Film, Polyacrylic Acid Tree Coated polyester film, polyacrylic acid resin coated nylon film, polyacrylic acid resin coated polypropylene film, polyglycolic acid resin coated polyester film, polyglycolic acid resin coated nylon film, organic resin coating such as polyglycolic acid resin coated polypropylene film Examples thereof include a film and a hybrid coating material made of an organic resin material and an inorganic material coated on a base film such as a polyester film, a nylon film, or a polypropylene film. These barrier films can be used alone or in combination of two or more.
さらに、ヒートシール性を有するプラスチック材料と積層する他のプラスチック材料としては、酸素吸収性樹脂からなるフイルム、或いは酸素吸収性樹脂と他の熱可塑性樹脂との積層フイルムを使用することもできる。
酸素吸収性樹脂としては、（１）樹脂自体が酸素吸収性を有する樹脂を使用する、もしくは（２）酸素吸収性を有する又は有しない熱可塑性樹脂中に酸素吸収剤を配合した樹組成物を使用することができる。酸素吸収性樹脂組成物（２）を構成する熱可塑性樹脂としては特に制限はなく、酸素バリヤー性を有する熱可塑性樹脂や、酸素バリヤー性を有さない熱可塑性樹脂のいずれもが使用できる。樹脂組成物（２）を構成する熱可塑性樹脂として、樹脂自体が酸素吸収性又は酸素バリヤー性を有するものを使用した場合は、酸素吸収剤による酸素吸収効果との組合せにより、容器内部への酸素の侵入を効果的に防止することができるので好ましい。
Furthermore, as another plastic material laminated with a plastic material having heat sealability, a film made of an oxygen-absorbing resin or a laminated film of an oxygen-absorbing resin and another thermoplastic resin can also be used.
As the oxygen-absorbing resin, (1) the resin itself uses a resin having oxygen-absorbing property, or (2) a tree composition in which an oxygen-absorbing agent is blended in a thermoplastic resin having or not having oxygen-absorbing property. Can be used. There is no restriction | limiting in particular as a thermoplastic resin which comprises an oxygen absorptive resin composition (2), Both the thermoplastic resin which has oxygen barrier property, and the thermoplastic resin which does not have oxygen barrier property can be used. As the thermoplastic resin constituting the resin composition (2), when the resin itself has an oxygen-absorbing property or an oxygen-barrier property, oxygen in the container is combined with the oxygen absorbing effect by the oxygen absorbent. This is preferable because it can effectively prevent the intrusion of.
樹脂自体が酸素吸収性を有するものとしては、例えば、樹脂の酸化反応を利用したものが挙げられる。酸化性の有機材料、例えば、ポリブタジエン、ポリイソプレン、ポリプロピレン、エチレン一酸化炭素共重合体、６−ナイロン、１２−ナイロン、メタキシリレンジアミン（ＭＸ）ナイロンのようなポリアミド類に、酸化触媒としてコバルト、ロジウム、銅等の遷移金属を含む有機酸塩類や、ベンゾフェノン、アセトフェノン、クロロケトン類のような光増感剤を加えたものが使用できる。これらの酸素吸収材料を使用した場合は、紫外線、電子線のような高エネルギー線を照射することによって、一層の効果を発現させることも出来る。 Examples of the resin itself having oxygen absorptivity include those utilizing an oxidation reaction of the resin. Oxidizing organic materials such as polybutadiene, polyisoprene, polypropylene, ethylene carbon monoxide copolymer, polyamides such as 6-nylon, 12-nylon, metaxylylenediamine (MX) nylon, cobalt as an oxidation catalyst Organic acid salts containing transition metals such as rhodium and copper, and those added with photosensitizers such as benzophenone, acetophenone and chloroketones can be used. When these oxygen-absorbing materials are used, further effects can be exhibited by irradiating with high energy rays such as ultraviolet rays and electron beams.
熱可塑性樹脂中に配合する酸素吸収剤としては、従来この種の用途に使用されている酸素吸収剤は全て使用できるが、一般には還元性でしかも実質上水に不溶なものが好ましく、その適当な例としては、還元性を有する金属粉、例えば還元性鉄、還元性亜鉛、還元性錫粉；金属低位酸化物、例えばＦｅＯ、Ｆｅ３Ｏ４；還元性金属化合物、例えば炭化鉄、ケイ素鉄、鉄カルボニル、水酸化第一鉄等の一種又は二種以上を組み合わせたものを主成分としたものが挙げられる。特に好ましい酸素吸収剤としては、還元性鉄、例えば鉄鋼の製造工程で得られる酸化鉄をコークスで還元し、生成した海綿鉄を粉砕後、水素ガスや分解アンモニアガス中で仕上還元を行なった還元性鉄や、酸洗工程で得られる塩化鉄水溶液から鉄を電解析出させ、粉砕後仕上還元を行なった還元性鉄等が挙げられる。
これらの酸素吸収剤は必要に応じて、アルカリ金属、アルカリ土類金属の水酸化物、炭酸塩、亜硫酸塩、チオ硫酸塩、第三リン酸塩、第二リン酸塩、有機酸塩、ハロゲン化物等の電解質からなる酸化促進剤や、さらには活性炭、活性アルミナ、活性白土のような助剤とも組み合わせて使用することができる。特に好ましい酸化促進剤としては、塩化ナトリウム、塩化カルシウム或いはこれらを組合わせたもの等が挙げられる。
還元性鉄と酸化促進剤を組合わせて使用する場合には、両者の配合割合は、合計量を１００重量部として、還元性鉄９９〜８０重量部及び酸化促進剤１〜２０重量部、特に還元性鉄９８〜９０重量部及び酸化促進剤２〜１０重量部とすることが好ましい。
As the oxygen absorber to be blended in the thermoplastic resin, all the oxygen absorbers conventionally used for this kind of application can be used. However, in general, those which are reducible and substantially insoluble in water are preferable. Examples include metal powders having reducibility, such as reducible iron, reductive zinc, reducible tin powder; metal lower oxides such as FeO, Fe 3 O 4 ; reducible metal compounds such as iron carbide, silicon iron , Iron carbonyl, ferrous hydroxide, etc., or a combination of two or more thereof. As a particularly preferred oxygen absorbent, reducing iron, for example, iron oxide obtained in the steel production process is reduced with coke, and the resulting sponge iron is pulverized and then subjected to finish reduction in hydrogen gas or decomposed ammonia gas. And iron that is electrolytically deposited from an aqueous iron chloride solution obtained in the pickling step, and reduced iron that has been subjected to finish reduction after pulverization can be used.
These oxygen absorbers can be used as required in alkali metal, alkaline earth metal hydroxides, carbonates, sulfites, thiosulfates, tertiary phosphates, secondary phosphates, organic acid salts, halogens. It can also be used in combination with an oxidation accelerator composed of an electrolyte such as a chemical compound, and further an auxiliary agent such as activated carbon, activated alumina, activated clay. Particularly preferred oxidation promoters include sodium chloride, calcium chloride, or combinations thereof.
When reducing iron and an oxidation accelerator are used in combination, the blending ratio of both is 99 to 80 parts by weight of reducing iron and 1 to 20 parts by weight of an oxidation accelerator, with the total amount being 100 parts by weight. It is preferable to use 98 to 90 parts by weight of reducing iron and 2 to 10 parts by weight of an oxidation accelerator.
他の酸素吸収剤としては、多価フェノールを骨格内に有する高分子化合物、例えば多価フェノール含有フェノール・アルデヒド樹脂等が挙げられる。更に、水溶性物質であるアスコルビン酸、エリソルビン酸、トコフェロール類及びこれらの塩類等も好適に使用することが出来る。これらの酸素吸収性物質の内でも、還元性鉄及びアスコルビン酸系化合物が特に好ましい。
また、上記の樹脂自体が酸素吸収性を有する樹脂を、酸素吸収剤として熱可塑性樹脂中に配合してもよい。
Other oxygen absorbers include polymer compounds having a polyhydric phenol in the skeleton, such as polyhydric phenol-containing phenol / aldehyde resins. Furthermore, ascorbic acid, erythorbic acid, tocopherols and salts thereof, which are water-soluble substances, can be suitably used. Of these oxygen-absorbing substances, reducing iron and ascorbic acid compounds are particularly preferable.
Moreover, you may mix | blend the resin in which said resin itself has oxygen absorptivity in a thermoplastic resin as an oxygen absorber.
これら酸素吸収剤は、一般に平均粒径が５０μｍ以下、特に３０μｍ以下の粒径を有することが好ましく、透明あるいは半透明性を必要とする場合には、平均粒径１０μｍ以下、特に５μｍ以下の粒径を有することが好ましい。酸素吸収剤は、上記の樹脂に１乃至７０重量％、特に５乃至３０重量％の割合で配合することが好ましい。 These oxygen absorbents generally have an average particle size of preferably 50 μm or less, particularly 30 μm or less. When transparent or translucent is required, the average particle size is 10 μm or less, particularly 5 μm or less. It preferably has a diameter. The oxygen absorbent is preferably blended in the above resin in a proportion of 1 to 70% by weight, particularly 5 to 30% by weight.
本発明では、上記プラスチック材料により構成された未延伸の、或いは一軸又は二軸延伸したフイルムを、常法によりヒートシールすることにより電子レンジ用包装袋を構成する。フイルムがヒートシール性を有する熱可塑性樹脂とヒートシール性を有さない熱可塑性樹脂との積層フイルムである場合には、ヒートシール性を有する熱可塑性樹脂層同士が内面となるようにヒートシールする。 In this invention, the packaging bag for microwave ovens is comprised by heat-sealing the unstretched film comprised by the said plastic material, or the uniaxially or biaxially stretched by the conventional method. When the film is a laminated film of a thermoplastic resin having heat sealing properties and a thermoplastic resin having no heat sealing properties, heat sealing is performed so that the thermoplastic resin layers having heat sealing properties become inner surfaces. .
つぎに、図面に基づいて本発明の平パウチタイプのプラスチックパウチの構成について説明するが、以下の具体例は本発明を限定するものではない。
図１〜図３は、本発明のプラスチックパウチの１例を示す図であり、図１はパウチの製造工程を説明する模式図、図２はパウチを裏側から見た平面図である。
また、図３はこのパウチを電子レンジ内で加熱した状態を表す模式図であり、（Ａ）はパウチが未開口で加熱調理中の状態を表し、（Ｂ）はパウチが部分的に開口して調理が完了した状態を表す。
Next, the structure of the flat pouch type plastic pouch of the present invention will be described with reference to the drawings. However, the following specific examples do not limit the present invention.
1-3 is a figure which shows an example of the plastic pouch of this invention, FIG. 1 is a schematic diagram explaining the manufacturing process of a pouch, FIG. 2 is the top view which looked at the pouch from the back side.
FIG. 3 is a schematic view showing a state in which this pouch is heated in a microwave oven, (A) shows a state where the pouch is not opened and is being cooked, and (B) shows a state where the pouch is partially opened. Indicates that cooking has been completed.
このパウチ１は、パウチの表面を構成するフイルム１１とパウチの裏面を構成するフイルム１２を重ね合わせ、周縁部をヒートシールすることによって製造される。その際に、パウチの裏面を構成するフイルム１２を、パウチの幅方向全長にわたってＺ字形に折返し、内容物の充填口４となる一方の短辺端部を除いて周縁部をヒートシールすることによって、パウチ本体と連通する折返し部２を形成する。また、充填口４とは反対側の短辺端部には、周縁シール部をパウチ内方に向けてＵ字形に突出させ、突出部６内に開孔（貫通孔）部７を設けることによって弱化部を有する蒸気抜きシール部を形成し、パウチを電子レンジで加熱した際に自動的に開口する自動開口機構５としている。
弱化部の形成方法としては、開孔（貫通孔）に代えて半貫通孔、スリットや未シール部を設ける等、他の公知の方法を採用できることは勿論である。
The pouch 1 is manufactured by superimposing a film 11 constituting the front surface of the pouch and a film 12 constituting the back surface of the pouch and heat-sealing the peripheral edge. At that time, the film 12 constituting the back surface of the pouch is folded back in a Z shape over the entire length in the width direction of the pouch, and the peripheral edge portion is heat-sealed except for one short side end portion which becomes the filling port 4 of the contents. The folded portion 2 communicating with the pouch body is formed. Further, a peripheral seal portion is projected in a U shape toward the inside of the pouch at the short side end opposite to the filling port 4, and an opening (through hole) portion 7 is provided in the projection 6. A steam vent seal portion having a weakened portion is formed, and the automatic opening mechanism 5 is automatically opened when the pouch is heated in a microwave oven.
As a method for forming the weakened portion, it goes without saying that other known methods such as providing a semi-through hole, a slit or an unsealed portion instead of the opening (through hole) can be adopted.
このパウチ１内にレトルト食品等の内容物を充填した後に、充填口４をヒートシールして密封したパウチを電子レンジ内に平置きして加熱調理すると、内容物から発生した水蒸気等によってパウチの内圧が上昇し、パウチが膨張する。その際にパウチ裏面１２に設けられた折返し部２内にも水蒸気が侵入し、折返し部２を起点にして自動開口機構５を設けたパウチ端部が立上がる（図３（Ａ）参照）。 After filling the pouch 1 with the contents such as the retort food, when the pouch sealed by sealing the filling port 4 with heat is placed in a microwave oven and cooked, the pouch is heated by steam generated from the contents. The internal pressure rises and the pouch expands. At this time, water vapor also enters the folded portion 2 provided on the back surface 12 of the pouch, and the end portion of the pouch provided with the automatic opening mechanism 5 rises from the folded portion 2 (see FIG. 3A).
パウチ１の内圧の上昇にともなって、自動開口機構５の突出部６の先端に応力が集中して、シール部が徐々にパウチ外側に向って剥離し、開孔７に剥離が到達するとパウチが部分的に開口し、水蒸気等が開孔７から外部に排出され、パウチの内圧が低下する。この時にも、パウチ裏面１２に設けた折返し部２がスタンドのような役割をはたし、開口した自動開口機構５が高い位置に安定して保持される（図３（Ｂ）参照）。
このように、このパウチ１では、電子レンジによる加熱調理中及び調理終了後も、パウチに形成した自動開口機構５が高い位置に保持され、内容物の噴き出しや漏れ出しを防止することができる。
As the internal pressure of the pouch 1 increases, stress concentrates on the tip of the protruding portion 6 of the automatic opening mechanism 5, and the seal portion gradually peels toward the outside of the pouch. Partially opening, water vapor or the like is discharged to the outside through the opening 7, and the internal pressure of the pouch is lowered. Also at this time, the folded-back portion 2 provided on the back surface 12 of the pouch functions like a stand, and the opened automatic opening mechanism 5 is stably held at a high position (see FIG. 3B).
Thus, in this pouch 1, the automatic opening mechanism 5 formed in the pouch is held at a high position even during cooking by the microwave oven and after the end of cooking, and the contents can be prevented from being ejected or leaked out.
図４及び図５は、本発明のプラスチックパウチの他の例を示す図であり、図４はパウチの製造工程を説明する模式図であり、図５はパウチを裏側から見た平面図である。
このパウチ２１では、パウチ裏面を構成するフイルム１２をパウチの幅方向全長にわたってＺ字形に折返した後に、さらに逆Ｚ字状に折返すことによって折返し部２を形成する。また、周縁シール部をパウチ内方に向けてＵ字形に突出させ、突出部６内にパウチ外部に通じる開孔７を設けることによって、自動開口機構５を形成している。パウチ２１の他の構成は、図１〜図３のパウチ１と同様である。
4 and 5 are views showing another example of the plastic pouch according to the present invention. FIG. 4 is a schematic view for explaining the manufacturing process of the pouch. FIG. 5 is a plan view of the pouch as viewed from the back side. .
In this pouch 21, the film 12 constituting the back surface of the pouch is folded back in a Z shape over the entire length in the width direction of the pouch, and then folded back in an inverted Z shape to form the folded portion 2. In addition, the automatic opening mechanism 5 is formed by projecting the peripheral seal portion in a U-shape toward the inside of the pouch and providing an opening 7 in the projection 6 that communicates with the outside of the pouch. Other configurations of the pouch 21 are the same as those of the pouch 1 shown in FIGS.
このパウチ２１では、折返し部２の両側でフイルムを折返したことによって、パウチ２１を電子レンジで加熱調理する際に、水蒸気の侵入によっておし拡げられる折返し部２の容積が大きくなるので、折返し部２を起点とするパウチ端部の立上がりが容易になり、自動開口機構５をより高い位置に安定して保持することが可能になる。 In this pouch 21, since the film is folded on both sides of the folded portion 2, the volume of the folded portion 2 that is spread by steam intrusion when the pouch 21 is cooked in a microwave oven increases. As a result, the end of the pouch starting from 2 can be easily raised, and the automatic opening mechanism 5 can be stably held at a higher position.
図６〜図８は、本発明のプラスチックパウチの他の例を示す図であり、図６はパウチの製造工程を説明する模式図、図７はパウチを表側から見た平面図、そして図８はパウチの折返し部を形成する工程を説明する拡大模式図である。
このパウチ３１では、パウチの表面を構成するフイルム１１及び裏面を構成するフイルム１２の両方を同じ位置で、それぞれ逆Ｚ字形及びＺ字形に折返すことによって、折返し部３２、３２をパウチの両面に形成する。
6-8 is a figure which shows the other example of the plastic pouch of this invention, FIG. 6 is a schematic diagram explaining the manufacturing process of a pouch, FIG. 7 is the top view which looked at the pouch from the front side, and FIG. FIG. 5 is an enlarged schematic view illustrating a process of forming a folded portion of a pouch.
In this pouch 31, by folding both the film 11 constituting the front surface of the pouch and the film 12 constituting the back surface into the opposite Z-shape and the Z-shape at the same position, the folded portions 32 and 32 are formed on both sides of the pouch. Form.
この折返し部３２、３２を形成する際に、図８にみられるように、周縁シール部３、３を構成する表面フイルム１１及び裏面フイルム１２の最外層に配置されるフイルムよりも内層に位置するフイルムに開孔部３３（この例では計４箇所）を設け、該開孔部３３を介して表裏両面の最外層に配置されたフイルム１１、１２をヒートシールするものである。
折返し部３２におけるヒートシールをこのよう構成とすることによって、折返し部３２、３２における周縁シール部３のヒートシール強度を高め、パウチ３１を電子レンジで加熱調理する際の、パウチ端部の立上りを確実なものとすることができる。
なお、折返し部の周縁シール部内層に位置するフイルムに開孔部を設ける上記の構成は、パウチの裏面フイルムにのみ折返し部を形成する図１〜図５のパウチにも適用することができる。
When the folded portions 32 and 32 are formed, as shown in FIG. 8, the folded portions 32 and 32 are positioned in an inner layer than the film disposed in the outermost layer of the front surface film 11 and the back surface film 12 constituting the peripheral seal portions 3 and 3. The film is provided with opening portions 33 (in this example, a total of four locations), and the films 11 and 12 disposed on the outermost layers on both the front and back surfaces are heat-sealed through the opening portions 33.
By configuring the heat seal in the folded portion 32 in this manner, the heat seal strength of the peripheral seal portion 3 in the folded portions 32 and 32 is increased, and the rising edge of the pouch end when the pouch 31 is cooked in a microwave oven. It can be certain.
In addition, said structure which provides an opening part in the film located in the peripheral seal part inner layer of a folding | turning part is applicable also to the pouch of FIGS. 1-5 which forms a folding | turning part only in the back surface film of a pouch.
また、このパウチ３１では自動開口機構３５として、周縁シール部３から分離した位置で表裏両面のフイルムをヒートシールし、このヒートシール部３６内に開孔（貫通孔）３７を設けることによって、弱化部３７を有する蒸気抜きシール部３６を形成している。
弱化部３７の形成方法としては、開孔（貫通孔）に代えて半貫通孔、スリットや未シール部を設ける等、他の公知の方法を採用できることは勿論である。
Further, in this pouch 31, the automatic opening mechanism 35 is weakened by heat-sealing the film on both the front and back surfaces at a position separated from the peripheral seal portion 3, and providing an opening (through hole) 37 in the heat seal portion 36. A steam release seal portion 36 having a portion 37 is formed.
As a method of forming the weakened portion 37, it is needless to say that other known methods such as providing a semi-through hole, a slit or an unsealed portion instead of the opening (through hole) can be adopted.
図９〜図１１は、本発明のプラスチックパウチの他の例を示す図であり、図９はパウチの製造工程を説明する模式図、図１０はパウチを裏側から見た平面図、そして図１１はパウチを電子レンジ内で加熱した状態を表す模式図である。
このパウチ４２では、パウチの一端部よりの位置で、パウチ裏面を構成するフイルム１２をパウチの幅方向全長にわたってＺ字形に折返すことによって第１の折返し部４２を形成し、パウチの他端よりの位置でフイルム１２を逆Ｚ字形に折返すことによって第２の折返し部４２を形成している。
また、パウチ４２の両端部では、周縁シール部３から分離した位置で開孔による弱化部４７を有する蒸気抜きシール部４６をそれぞれ設けることによって自動開口機構４５、４５を形成している。
9 to 11 are views showing other examples of the plastic pouch of the present invention. FIG. 9 is a schematic view for explaining the manufacturing process of the pouch, FIG. 10 is a plan view of the pouch as seen from the back side, and FIG. FIG. 3 is a schematic diagram showing a state where a pouch is heated in a microwave oven.
In this pouch 42, the first folded portion 42 is formed by folding the film 12 constituting the back surface of the pouch into a Z shape over the entire length in the width direction of the pouch at a position from one end portion of the pouch, and from the other end of the pouch. The second folded portion 42 is formed by folding the film 12 in an inverted Z-shape at the position.
In addition, at both ends of the pouch 42, the automatic opening mechanisms 45 and 45 are formed by providing steam release seal portions 46 each having a weakened portion 47 by opening at positions separated from the peripheral seal portion 3.
このパウチ４１を電子レンジ内に平置きして加熱すると、内容物から発生した水蒸気等によってパウチ４１の内圧が上昇し、パウチ４１が膨張する。その際に、折返し部４２、４２内にも水蒸気が侵入し、折返し部４２、４２を起点にしてパウチ４１の両側が立上がり、自動開口機構４５、４５がそれぞれ高い位置に保持される（図１１参照）。自動開口機構４５、４５が開口し、パウチ４１の内圧が低下して調理が完了した後にも、パウチ４１は縮小した状態でほぼその形状を維持する。したがって、このパウチ４１はトレーのように使用することができる。 When the pouch 41 is placed flat in a microwave oven and heated, the internal pressure of the pouch 41 increases due to water vapor generated from the contents, and the pouch 41 expands. At that time, water vapor also enters the folded portions 42, 42, the both sides of the pouch 41 rise from the folded portions 42, 42, and the automatic opening mechanisms 45, 45 are held at high positions (FIG. 11). reference). Even after the automatic opening mechanisms 45 and 45 are opened and the internal pressure of the pouch 41 is reduced and cooking is completed, the pouch 41 maintains its shape in a contracted state. Therefore, this pouch 41 can be used like a tray.
上記の各例では、本発明のプラスチックパウチとしてパウチに自動開口機構を設けた例について説明したが、このような自動開口機構を設けずに、本発明の折返し部を有するプラスチックパウチを構成することも可能である。
本発明で採用する自動開口機構としては特に制限はなく、例えばパウチの周縁シール部をパウチ内方に向けてＵ字形乃至Ｖ字形に突出させ、突出部内にパウチ外部に通じる未シール部を設けたり、この未シール部を打抜いて自動開口機構を構成することもできる。
また、プラスチックパウチの寸法、形状やパウチを構成するフイルムの材質等は、適宜選択できることは言うまでもない。
In each of the above examples, the example in which the automatic opening mechanism is provided in the pouch as the plastic pouch of the present invention has been described, but the plastic pouch having the folded portion of the present invention is configured without providing such an automatic opening mechanism. Is also possible.
The automatic opening mechanism employed in the present invention is not particularly limited. For example, the peripheral seal portion of the pouch projects in a U-shape or V-shape toward the inside of the pouch, and an unsealed portion that communicates with the outside of the pouch is provided in the projection portion. The unsealed portion can be punched to constitute an automatic opening mechanism.
Needless to say, the dimensions and shape of the plastic pouch and the material of the film constituting the pouch can be selected as appropriate.
１，２１，３１，４１ プラスチックパウチ
２，３２，４２ 折返し部
３ 周縁シール部
４ 充填口
５，３５，４５ 自動開口機構
６ 突出部
７，３３，３７，４７ 開孔
１１ 表面フイルム
１２ 裏面フイルム
３６，４６ 蒸気抜きシール部
1, 21, 31, 41 Plastic pouches 2, 32, 42 Folded part 3 Peripheral seal part 4 Filling port 5, 35, 45 Automatic opening mechanism 6 Protruding part 7, 33, 37, 47 Opening 11 Front film 12 Back film 36 46 Vapor vent seal
Claims (5)
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004244606A JP4258455B2 (en) | 2004-08-25 | 2004-08-25 | Plastic pouch |
| CN200910179293A CN101670892A (en) | 2004-08-25 | 2005-08-25 | Plastic pouch and method of producing the same |
| US11/660,154 US8157445B2 (en) | 2004-08-25 | 2005-08-25 | Plastic pouch and manufacturing method therefor |
| PCT/JP2005/015965 WO2006022435A1 (en) | 2004-08-25 | 2005-08-25 | Plastic pouch and method of producing the same |
| KR1020077004148A KR100878786B1 (en) | 2004-08-25 | 2005-08-25 | Plastic pouch and method of producing the same |
| CA002577367A CA2577367C (en) | 2004-08-25 | 2005-08-25 | Plastic pouch and manufacturing method therefor |
| AU2005275647A AU2005275647B2 (en) | 2004-08-25 | 2005-08-25 | Plastic pouch and method of producing the same |
| CN2005800365461A CN101052574B (en) | 2004-08-25 | 2005-08-25 | Plastic pouch and method of producing the same |
| EP05776978.8A EP1783064B1 (en) | 2004-08-25 | 2005-08-25 | Plastic pouch and method of producing the same |
| US13/418,303 US8951178B2 (en) | 2004-08-25 | 2012-03-12 | Plastic pouch and manufacturing method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004244606A JP4258455B2 (en) | 2004-08-25 | 2004-08-25 | Plastic pouch |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008234094A Division JP4687763B2 (en) | 2008-09-12 | 2008-09-12 | Plastic pouch |
| JP2008234090A Division JP4911151B2 (en) | 2008-09-12 | 2008-09-12 | Plastic pouch |
| JP2008234091A Division JP4420255B2 (en) | 2008-09-12 | 2008-09-12 | Plastic pouch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2006062672A JP2006062672A (en) | 2006-03-09 |
| JP4258455B2 true JP4258455B2 (en) | 2009-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004244606A Expired - Lifetime JP4258455B2 (en) | 2004-08-25 | 2004-08-25 | Plastic pouch |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4258455B2 (en) |
| CN (1) | CN101052574B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4930711B2 (en) * | 2007-04-25 | 2012-05-16 | 共同印刷株式会社 | Microwave oven packaging bag |
| JP2009166853A (en) * | 2008-01-11 | 2009-07-30 | Aohata Corp | Packaging bag |
| JP5641188B2 (en) * | 2010-01-15 | 2014-12-17 | 東洋製罐株式会社 | Flexible packaging products |
| JP2011148504A (en) * | 2010-01-19 | 2011-08-04 | Toppan Printing Co Ltd | Container for microwave oven |
| JP5845583B2 (en) * | 2011-01-21 | 2016-01-20 | 凸版印刷株式会社 | Packaging bag |
| WO2014175339A1 (en) * | 2013-04-23 | 2014-10-30 | 株式会社彫刻プラスト | Resin packaging bag for microwave oven, method for heating same, method for filling resin packaging bag for microwave oven, and package |
| JP6662095B2 (en) * | 2016-02-24 | 2020-03-11 | 凸版印刷株式会社 | Packaging bag |
| JP7500974B2 (en) | 2020-01-21 | 2024-06-18 | 東洋製罐株式会社 | How the pouch is made |
| CN111366048B (en) * | 2020-03-24 | 2022-10-28 | 宋俊生 | Coupling type water cannon mud bag and method for filling blast hole by using same |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06170989A (en) * | 1992-12-08 | 1994-06-21 | Totani Giken Kogyo Kk | Bag making machine |
| JPH1148371A (en) * | 1997-08-06 | 1999-02-23 | Tousero Kk | Manufacture of food package for microwave oven |
| JP3872603B2 (en) * | 1997-11-19 | 2007-01-24 | 大日本印刷株式会社 | Packaging bag |
| JP2000327044A (en) * | 1999-05-13 | 2000-11-28 | Toppan Printing Co Ltd | Standing pouch |
| JP2002080072A (en) * | 2000-09-07 | 2002-03-19 | Marumiya Sangyo:Kk | Sealing bag for heat-cooking by microwave oven |
| JP3665795B2 (en) * | 2000-10-31 | 2005-06-29 | 株式会社マルミヤ産業 | Manufacturing method of sealed bag for microwave cooking |
| JP4029590B2 (en) * | 2000-12-19 | 2008-01-09 | 東洋製罐株式会社 | Microwave packaging bag |
| JP4231988B2 (en) * | 2001-09-14 | 2009-03-04 | 東洋製罐株式会社 | Packaging bag for microwave oven and method for producing package body filled with contents in the packaging bag |
| JP3675399B2 (en) * | 2001-12-21 | 2005-07-27 | 東洋製罐株式会社 | PACKAGING BAG FOR MICROWAVE RANGE AND METHOD FOR MANUFACTURING PACKAGE BODY PACKED WITH CONTENTS |
| JP2004106863A (en) * | 2002-09-17 | 2004-04-08 | Dainippon Printing Co Ltd | Packaging bag for use in microwave oven |
| JP4337466B2 (en) * | 2003-08-08 | 2009-09-30 | 凸版印刷株式会社 | Packaging bag having steam venting function and packaging body using the same |
-
2004
- 2004-08-25 JP JP2004244606A patent/JP4258455B2/en not_active Expired - Lifetime
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2005
- 2005-08-25 CN CN2005800365461A patent/CN101052574B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006062672A (en) | 2006-03-09 |
| CN101052574A (en) | 2007-10-10 |
| CN101052574B (en) | 2010-09-29 |
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