JP2019064720A - Vegetable/fruit freshness keeping storage bag - Google Patents
Vegetable/fruit freshness keeping storage bag Download PDFInfo
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- JP2019064720A JP2019064720A JP2017194211A JP2017194211A JP2019064720A JP 2019064720 A JP2019064720 A JP 2019064720A JP 2017194211 A JP2017194211 A JP 2017194211A JP 2017194211 A JP2017194211 A JP 2017194211A JP 2019064720 A JP2019064720 A JP 2019064720A
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- resin film
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- fruits
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- 235000013399 edible fruits Nutrition 0.000 title abstract description 8
- 235000013311 vegetables Nutrition 0.000 title abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000001301 oxygen Substances 0.000 claims abstract description 36
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 36
- 230000035699 permeability Effects 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 28
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 22
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 22
- 238000010030 laminating Methods 0.000 claims abstract description 7
- 229920003002 synthetic resin Polymers 0.000 claims description 74
- 239000000057 synthetic resin Substances 0.000 claims description 74
- 235000012055 fruits and vegetables Nutrition 0.000 claims description 36
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- 229920002799 BoPET Polymers 0.000 claims 1
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- 238000007789 sealing Methods 0.000 abstract description 20
- 235000002678 Ipomoea batatas Nutrition 0.000 abstract description 16
- 244000017020 Ipomoea batatas Species 0.000 abstract description 16
- 238000002845 discoloration Methods 0.000 abstract description 15
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- 235000005362 Dioscorea floribunda Nutrition 0.000 abstract 1
- 235000004868 Dioscorea macrostachya Nutrition 0.000 abstract 1
- 235000005361 Dioscorea nummularia Nutrition 0.000 abstract 1
- 235000005360 Dioscorea spiculiflora Nutrition 0.000 abstract 1
- 235000006350 Ipomoea batatas var. batatas Nutrition 0.000 abstract 1
- 235000011862 Vitis cinerea Nutrition 0.000 abstract 1
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- 230000001747 exhibiting effect Effects 0.000 abstract 1
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- 238000005259 measurement Methods 0.000 description 8
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- 235000009754 Vitis X bourquina Nutrition 0.000 description 7
- 235000012333 Vitis X labruscana Nutrition 0.000 description 7
- 235000014787 Vitis vinifera Nutrition 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 7
- 239000000470 constituent Substances 0.000 description 7
- 235000014113 dietary fatty acids Nutrition 0.000 description 7
- 239000000194 fatty acid Substances 0.000 description 7
- 229930195729 fatty acid Natural products 0.000 description 7
- 229920005672 polyolefin resin Polymers 0.000 description 7
- 239000012298 atmosphere Substances 0.000 description 6
- 230000005484 gravity Effects 0.000 description 6
- 241000208822 Lactuca Species 0.000 description 5
- 235000003228 Lactuca sativa Nutrition 0.000 description 5
- 235000009337 Spinacia oleracea Nutrition 0.000 description 5
- 235000012015 potatoes Nutrition 0.000 description 5
- 241000219315 Spinacia Species 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 239000002736 nonionic surfactant Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 229920006381 polylactic acid film Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
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- 230000001953 sensory effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 241000135194 Pione Species 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
- 150000001412 amines Chemical class 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
- 230000001143 conditioned effect Effects 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical class C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 239000013032 Hydrocarbon resin Substances 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 206010037180 Psychiatric symptoms Diseases 0.000 description 1
- 244000300264 Spinacia oleracea Species 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000003973 alkyl amines Chemical class 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 229920006378 biaxially oriented polypropylene Polymers 0.000 description 1
- 239000011127 biaxially oriented polypropylene Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- BXKDSDJJOVIHMX-UHFFFAOYSA-N edrophonium chloride Chemical compound [Cl-].CC[N+](C)(C)C1=CC=CC(O)=C1 BXKDSDJJOVIHMX-UHFFFAOYSA-N 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 229920006270 hydrocarbon resin Polymers 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 239000005026 oriented polypropylene Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 230000005068 transpiration Effects 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Abstract
Description
本発明は、合成樹脂フィルムによって形成された青果物の鮮度保持用の収納袋に関するものである。 The present invention relates to a storage bag for maintaining the freshness of fruits and vegetables formed of a synthetic resin film.
葉菜類、果菜類、根菜類、フルーツ、菌茸類等の各種の青果物を収納するための収納袋として、合成樹脂製のフィルムによって形成されたパウチ、ガゼット袋、三方袋、二方袋、合掌袋等の収納袋が知られている。また、そのような合成樹脂製のフィルムからなる収納袋は、２枚の合成樹脂フィルムを重ねて（あるいは単一の合成樹脂フィルムを折り畳んで）外周をヒートシール（熱接着）することによって形成されることが多い。そのため、ヒートシールの容易性（比較的に低い温度でヒートシールできること）の観点から、合成樹脂フィルムからなる収納袋の構成材料として、ポリオレフィン系の樹脂からなるフィルムが広く用いられている（特許文献１）。 A pouch made of a synthetic resin film, a pouch, a gusseted bag, a three-sided bag, a two-sided bag, a palm bag, as a storage bag for storing various vegetables and fruits such as leafy vegetables, fruits, root vegetables, fruits and fungi. Etc. Storage bags are known. In addition, a storage bag made of such a synthetic resin film is formed by laminating two synthetic resin films (or folding a single synthetic resin film) and heat sealing the outer periphery (thermal bonding). Often. Therefore, a film made of a polyolefin resin is widely used as a constituent material of a storage bag made of a synthetic resin film from the viewpoint of ease of heat sealing (that can be heat sealed at a relatively low temperature) (Patent Document 1).
ところが、ポリオレフィン系の樹脂からなるフィルムは、水蒸気透過率が低いため、水蒸気の排出量が大きい青果物を収納して密封すると、フィルムの内面に水滴が付着して曇り、外観が低下してしまう。そのため、水蒸気の排出量が大きい青果物を収納するための収納袋として、構成材料であるポリオレフィン系樹脂フィルムに孔やスリットを設けて水蒸気透過度を調整した収納袋が開発されている。 However, since a film made of a polyolefin resin has a low water vapor transmission rate, when a fruit or vegetable having a large water vapor discharge rate is stored and sealed, water droplets adhere to the inner surface of the film to make it cloudy and the appearance is deteriorated. Therefore, as a storage bag for storing fruits and vegetables with a large discharge amount of water vapor, a storage bag in which holes and slits are provided in a polyolefin resin film as a constituent material to adjust the water vapor permeability has been developed.
しかしながら、特許文献１の如き従来のポリオレフィン系樹脂フィルムからなる収納袋は、長イモ、サツマイモ、ブドウ等の袋内が過湿状態となったときにカビが成長しやすく、かつ、酸素による酸化変色がしやすい上に、重量および体積が大きな青果物を収納してヒートシール等の方法によって密封すると、ポリオレフィン系樹脂フィルムの柔軟性が高いことに起因して、内部に多くの空気が入り込んでしまい、収納された青果物の鮮度保持に悪影響が及んでしまうことがある。加えて、ポリオレフィン系樹脂フィルムに水蒸気透過度を調整するための孔やスリットを設けた収納袋は、製袋工程の途中でポリオレフィン系樹脂フィルムに均一な孔やスリットを設けなければならないため、製造にコストおよび手間が掛かる、という不具合がある。また、孔やスリットを設けたことにより、酸素透過度も必要以上に高くなってしまうという問題もある。 However, a storage bag made of a conventional polyolefin resin film as disclosed in Patent Document 1 is apt to grow mold when the inside of the bag such as long potato, sweet potato, grape, etc. becomes excessively moist, and is oxidized and discolored by oxygen In addition to being easy to peel off, when fruits and vegetables with large weight and volume are stored and sealed by a method such as heat sealing, much air enters inside due to the high flexibility of the polyolefin resin film, An adverse effect may be exerted on the keeping of freshness of stored fruits and vegetables. In addition, a storage bag provided with holes or slits for adjusting the water vapor transmission rate in the polyolefin resin film is manufactured since uniform holes or slits must be provided in the polyolefin resin film in the middle of the bag-making process. Cost and time-consuming. In addition, the provision of the holes and the slits causes a problem that the oxygen permeability also becomes higher than necessary.
本発明の目的は、上記従来の青果物の鮮度保持用の収納袋が有する問題点を解消し、長イモ、サツマイモ、ブドウ等の袋内が過湿状態となったときにカビが成長しやすく、かつ、酸素による酸化変色がしやすい上に、重量および体積が大きな青果物を収納して密封する場合でも、内部に空気が入りにくく、鮮度保持効果に優れているとともに、製造が容易な青果物の鮮度保持用収納袋を提供することにある。 The object of the present invention is to solve the problems with the above-mentioned conventional storage bags for maintaining freshness of fruits and vegetables, and molds tend to grow when the inside of the bag such as long potatoes, sweet potatoes, grapes becomes excessively wet, At the same time, even when storing and sealing large fruits and vegetables with large weight and volume, in addition to being easily oxidized and discolored by oxygen, it is difficult for air to enter inside, and it is excellent in freshness holding effect and easy to manufacture. To provide a holding storage bag.
本発明の内、請求項１に記載された発明は、合成樹脂フィルムによって形成された青果物の鮮度保持用収納袋であって、前記合成樹脂フィルムの酸素透過度が、１００ｃｃ／（ｍ２・２４ｈｒ・ａｔｍ）以上１，０００ｃｃ／（ｍ２・２４ｈｒ・ａｔｍ）未満であり、かつ、前記合成樹脂フィルムの水蒸気透過度が、１５ｇ／（ｍ２・２４ｈｒ・ａｔｍ）以上５００ｇ／（ｍ２・２４ｈｒ・ａｔｍ）未満であるとともに、前記合成樹脂フィルムの縦方向および横方向の引張弾性率が、いずれも２，５００Ｍｐａ以上５，０００Ｍｐａ未満であることを特徴とするものである。なお、合成樹脂フィルムの縦方向（ＭＤ）とは、構成材料である長尺な合成樹脂フィルムの長手方向のことであり、合成樹脂フィルムの横方向（ＴＤ）とは、構成材料である長尺な合成樹脂フィルムの幅方向のことである。 Among the present inventions, the invention described in claim 1 is a storage bag for maintaining freshness of fruits and vegetables formed of a synthetic resin film, and the oxygen permeability of the synthetic resin film is 100 cc / (m 2 · 24 hr · Atm) or more and less than 1,000 cc / (m 2 · 24 hr · atm), and the water vapor permeability of the synthetic resin film is 15 g / (m 2 · 24 hr · atm) or more and 500 g / (m 2 · 24 hr And the tensile modulus of elasticity in the longitudinal direction and the transverse direction of the synthetic resin film is at least 2,500 MPa and less than 5,000 MPa. The longitudinal direction (MD) of the synthetic resin film means the longitudinal direction of the long synthetic resin film which is a constituent material, and the transverse direction (TD) of the synthetic resin film means a long material which is a constituent material Width direction of the synthetic resin film.
請求項２に記載された発明は、請求項１に記載された発明において、前記合成樹脂フィルムの縦方向および横方向の引張伸度が、いずれも１０％以上２００％未満であることを特徴とするものである。 The invention described in claim 2 is characterized in that, in the invention described in claim 1, the tensile elongation in the longitudinal direction and the transverse direction of the synthetic resin film is at least 10% and less than 200%. It is
請求項３に記載された発明は、請求項１、または請求項２に記載された発明において、前記合成樹脂フィルムが、ポリエステルあるいはポリ乳酸によって形成されたものであることを特徴とするものである。 The invention described in claim 3 is characterized in that, in the invention described in claim 1 or claim 2, the synthetic resin film is formed of polyester or polylactic acid. .
請求項４に記載された発明は、請求項１〜３のいずれかに記載された発明において、前記合成樹脂フィルムが、二軸延伸ポリエチレンテレフタレートフィルムの上に、溶融押出ししたポリエチレンテレフタレートを積層させることによって形成された積層ポリエチレンテレフタレートフィルムであることを特徴とするものである。 In the invention described in claim 4, in the invention described in any one of claims 1 to 3, the synthetic resin film is obtained by laminating melt-extruded polyethylene terephthalate on a biaxially stretched polyethylene terephthalate film. It is characterized in that it is a laminated polyethylene terephthalate film formed by
本発明に係る青果物の鮮度保持用収納袋は、長イモ、サツマイモ、ブドウ等の袋内が過湿状態となったときにカビが成長しやすく、かつ、酸素による酸化変色がしやすい上に、重量および体積が大きな青果物を収納して密封する場合でも、内部に空気が入りにくいため、鮮度保持効果に優れている。また、製造時に、製袋工程の途中で構成材料である合成樹脂フィルムに均一な孔やスリット等を設ける必要がないため、安価に、かつ、容易に製造することができ、適度な酸素透過度も保持できる。 In the storage bag for maintaining the freshness of fruits and vegetables according to the present invention, mold tends to grow when the inside of the bag such as long potato, sweet potato, grape etc. is over-moisturized, and oxidation discoloration due to oxygen is likely to occur. Even in the case of containing and sealing fruits and vegetables having a large weight and volume, it is difficult for air to enter inside, so the effect of maintaining freshness is excellent. In addition, since it is not necessary to provide uniform holes or slits in the synthetic resin film which is a constituent material in the middle of the bag-making process at the time of manufacturing, it can be easily manufactured at low cost, and appropriate oxygen permeability Can also hold.
本発明に係る青果物の鮮度保持用収納袋（以下、単に収納袋という）は、合成樹脂フィルムによって形成されており、その合成樹脂フィルムの酸素透過度、水蒸気透過度、縦方向および横方向の引張弾性率が、それぞれ、特定の数値範囲内に調整されたものである。 A storage bag for maintaining freshness of fruits and vegetables according to the present invention (hereinafter simply referred to as a storage bag) is formed of a synthetic resin film, and the oxygen permeability of the synthetic resin film, the water vapor permeability, the tension in the longitudinal direction and the transverse direction The elastic moduli are each adjusted within a specific numerical range.
本発明に係る収納袋を形成するための合成樹脂フィルムとしては、ポリオレフィンフィルム、ポリエステルフィルム等のヒートシールまたは溶断シールが可能な汎用の合成樹脂フィルムを好適に用いることができるが、それらの中でも、ポリエチレンテレフタレートフィルムあるいはポリ乳酸フィルムを用いると、酸素透過度、水蒸気透過度、縦方向および横方向の引張弾性率等の特性を、上記した特定の数値範囲内に調整し易くなる上、収納袋の透明性が高くなり、青果物を収納した場合に内部を見易くなるので好ましい。 As a synthetic resin film for forming the storage bag according to the present invention, general-purpose synthetic resin films such as polyolefin films and polyester films that can be heat-sealed or melt-sealed can be suitably used. The use of a polyethylene terephthalate film or a polylactic acid film makes it easy to adjust the properties such as oxygen permeability, water vapor permeability, tensile modulus in the longitudinal direction and transverse direction within the above-mentioned specific numerical range, and further, the storage bag Transparency becomes high and it is easy to look inside when storing fruits and vegetables, which is preferable.
また、合成樹脂フィルムは、単一層からなるもので良いし、基材層の上に熱融着層等を積層した多層構造を有するものでも良いが、合成樹脂フィルムとして、基材層である二軸延伸ポリエチレンテレフタレートフィルムの上に、溶融押出ししたポリエチレンテレフタレートを熱融着層として積層させることによって形成された積層ポリエチレンテレフタレートフィルムを用いると、袋内が過湿状態となったときにカビが成長しやすく、かつ、酸素による酸化変色がしやすい上に、重量および体積が大きな青果物を収納して密封する場合に、内部に入り込む空気の量をきわめて少なくすることが可能になるので好ましい。 The synthetic resin film may be a single layer, or may have a multilayer structure in which a heat fusion layer and the like are laminated on a base layer, but as a synthetic resin film, the base layer 2 When a laminated polyethylene terephthalate film formed by laminating melt-extruded polyethylene terephthalate as a heat fusion layer is used on an axially stretched polyethylene terephthalate film, mold grows when the inside of the bag becomes over-humidified In addition to being easily and oxidatively discolored by oxygen, it is preferable in the case of storing and sealing fruits and vegetables having a large weight and volume because the amount of air entering the inside can be extremely reduced.
また、形成材料である合成樹脂フィルムの厚さは、特に限定されないが、５〜７５μｍの範囲であると好ましく、２０〜４０μｍの範囲であるとより好ましい。合成樹脂フィルムの厚さが５μｍを下回ると、フィルムの“腰”がなくなってしまい、青果物（長イモ、サツマイモ、ブドウ等の袋内が過湿状態となったときにカビが成長しやすく、かつ、酸素による酸化変色がしやすい上に、重量および体積が大きなもの）を収納して密封する場合に、内部に空気が入り込み易くなるので好ましくなく、反対に、合成樹脂フィルムの厚さが７５μｍを上回ると、フィルムの剛性が高くなりすぎて、青果物を収納しにくくなったり、収納した後の密封作業がしにくくなったりするので好ましくない。 Moreover, the thickness of the synthetic resin film which is a formation material is although it does not specifically limit, It is preferable in the range of 5-75 micrometers, and more preferable in the range of 20-40 micrometers. When the thickness of the synthetic resin film is less than 5 μm, the film “waist” disappears, and molds tend to grow when the inside of a bag of fruits and vegetables (long potato, sweet potato, grape, etc. becomes over-humidified, and In addition, it is not preferable because it is easy to introduce air into the inside when storing and sealing a product with large weight and volume in addition to being easily oxidized and discolored by oxygen, and conversely, the thickness of the synthetic resin film is 75 μm When it exceeds, the rigidity of the film becomes too high, which makes it difficult to store fruits and vegetables, and makes it difficult to perform sealing work after storing, which is not preferable.
さらに、形成材料である合成樹脂フィルムは、引張試験における引張弾性率が、縦方向（すなわち、収納袋を製造する前の長尺なロールの長手方向）、横方向（すなわち、長手方向と直交する方向）ともに２，５００Ｍｐａ以上５，０００Ｍｐａ未満であることが必要であり、縦方向、横方向ともに３，０００Ｍｐａ以上４，５００Ｍｐａ未満であるとより好ましい。引張弾性率が２，５００Ｍｐａを下回ると、フィルムの腰がなくなってしまい、青果物（長イモ、サツマイモ、ブドウ等の袋内が過湿状態となったときにカビが成長しやすく、かつ、酸素による酸化変色がしやすい上に、重量および体積が大きなもの）を収納して密封する場合に、内部に空気が入り込み易くなるので好ましくなく、反対に、引張弾性率が５，０００Ｍｐａを上回ると、フィルムの剛性が高くなりすぎて、青果物を収納しにくくなったり、収納した後の密封作業がしにくくなったりするので好ましくない。 Furthermore, in the synthetic resin film which is a forming material, the tensile modulus in the tensile test is perpendicular to the longitudinal direction (that is, the longitudinal direction of the long roll before producing the storage bag) and to the transverse direction (that is, the longitudinal direction) Direction) Both are required to be 2,500 Mpa or more and less than 5,000 Mpa, and more preferably 3,000 Mpa or more and less than 4,500 Mpa in both longitudinal and lateral directions. If the tensile modulus is less than 2,500 MPa, the film loses its rigidity, and molds tend to grow when the inside of a bag of fruits and vegetables (long potato, sweet potato, grape, etc. becomes over-humidified, and oxygen In addition, when it is easy to cause oxidative discoloration, and it is easy to contain air when it is contained and sealed, which has a large weight and volume), it is not preferable if the tensile modulus exceeds 5,000 Mpa. It is not preferable because the rigidity of the product is too high, which makes it difficult to store fruits and vegetables and makes it difficult to perform sealing work after storage.
加えて、形成材料である合成樹脂フィルムは、引張試験における引張伸度が、縦方向、横方向ともに１０％以上２００％未満であると好ましく、縦方向、横方向ともに５０％以上２００％未満であるとより好ましい。引張伸度が１０％を下回ると、青果物（長イモ、サツマイモ、ブドウ等の袋内が過湿状態となったときにカビが成長しやすく、かつ、酸素による酸化変色がしやすい上に、重量および体積が大きなもの）を収納して密封する場合に、フィルムが破れ易くなるので好ましくなく、反対に、引張伸度が２００％を上回ると、製袋時に裁断性が不良となり、製造効率が悪くなるので好ましくない。 In addition, the synthetic resin film, which is a forming material, preferably has a tensile elongation in a tensile test of 10% or more and less than 200% in both the longitudinal and lateral directions, and 50% or more and less than 200% in both the longitudinal and transverse directions. Is more preferable. When the tensile elongation is less than 10%, molds are likely to grow when the inside of the bag of vegetables, fruits, sweet potatoes, grapes, etc. becomes excessively wet, and oxidation discoloration due to oxygen is likely to occur. And when the product is stored in a large volume) and sealed, it is not preferable because the film is easily broken. Conversely, if the tensile elongation exceeds 200%, the cuttability at the time of bag-making becomes poor and the production efficiency is poor. It is not preferable because
また、形成材料である合成樹脂フィルムは、酸素透過度が１００ｃｃ／（ｍ２・２４ｈｒ・ａｔｍ）以上１，０００ｃｃ／（ｍ２・２４ｈｒ・ａｔｍ）未満であることが必要であり、酸素透過度が２００ｃｃ／（ｍ２・２４ｈｒ・ａｔｍ）以上９００ｃｃ／（ｍ２・２４ｈｒ・ａｔｍ）未満であるとより好ましい。青果物（特に、長イモ、サツマイモ、ブドウ等の袋内が過湿状態となったときにカビが成長しやすく、かつ、酸素による酸化変色がしやすい上に、重量および体積が大きなもの）の鮮度を保持するためには、それらの青果物の呼吸作用を利用して脱気状態に近い状態を形成するのが好ましいが、酸素透過度が１００ｃｃ／（ｍ２・２４ｈｒ・ａｔｍ）を下回ると、脱気状態に近い状態となる前に青果物の呼吸によって袋内の酸素が減少し、青果物への酸素の供給が追い付かず、酸欠状態となり青果物の品質劣化が起こり易いので好ましくない。反対に、酸素透過度が１，０００ｃｃ／（ｍ２・２４ｈｒ・ａｔｍ）を上回ると、青果物を包装後、袋内への酸素の供給が過多となったり、保管環境によっては青果物の呼吸が変動するため、脱気状態に近い状態を形成するのが難しくなるので好ましくない。 In addition, it is necessary that the synthetic resin film which is a forming material has an oxygen permeability of 100 cc / (m 2 · 24 hr · atm) or more and less than 1,000 cc / (m 2 · 24 hr · atm). Is more preferably 200 cc / (m 2 · 24 hr · atm) or more and less than 900 cc / (m 2 · 24 hr · atm). Freshness of fruits and vegetables (especially, long potatoes, sweet potatoes, grapes, etc. when the inside of the bag becomes over-moist, mold grows easily, and it is easily oxidized and discolored by oxygen, and its weight and volume are large) It is preferable to form a nearly deaerated state using the respiration of these fruits and vegetables, but if the oxygen permeability is less than 100 cc / (m 2 · 24 hr · atm), It is not preferable because the oxygen in the bag is reduced by respiration of the fruits and vegetables before reaching a state of quiescence, and the supply of oxygen to the fruits and vegetables can not catch up with it, resulting in oxygen deficiency and deterioration of fruits and vegetables. On the other hand, if the oxygen permeability exceeds 1,000 cc / (m 2 · 24 hr · atm), after the fruits and vegetables are packaged, the supply of oxygen into the bag becomes excessive or the respiration of the fruits and vegetables fluctuates depending on the storage environment It is not preferable because it becomes difficult to form a near deaerated state.
また、形成材料である合成樹脂フィルムは、水蒸気透過度が１５ｇ／（ｍ２・２４ｈｒ・ａｔｍ）以上５００ｇ／（ｍ２・２４ｈｒ・ａｔｍ）未満であることが必要であり、水蒸気透過度が２０ｇ／（ｍ２・２４ｈｒ・ａｔｍ）以上４００ｇ／（ｍ２・２４ｈｒ・ａｔｍ）未満であるとより好ましい。水蒸気透過度が１０ｇ／（ｍ２・２４ｈｒ・ａｔｍ）を下回ると、青果物から蒸散によって発生した水分で袋内が過湿状態となり、カビが成長して、青果物の品質を失ってしまうため好ましくない。反対に、水蒸気透過度が５００ｇ／（ｍ２・２４ｈｒ・ａｔｍ）を上回ると、青果物を包装後、青果物から発生した水分が、袋外へと出て行ってしまい、次第に、青果物の水分が失われて瑞瑞しさを失うことから好ましくない。 Moreover, the synthetic resin film which is a forming material needs to have a water vapor transmission rate of 15 g / (m 2 · 24 hr · atm) or more and less than 500 g / (m 2 · 24 hr · atm), and the water vapor transmission rate is 20 g / (m 2 · 24hr · atm ) or 400g / (m 2 · 24hr · atm) is less than preferred. If the water vapor transmission rate is less than 10 g / (m 2 · 24 hr · atm), the moisture in the bag will be over-humidified by the moisture generated by transpiration from the fruits and vegetables, mold will grow, and it is not preferable . On the other hand, when the water vapor transmission rate exceeds 500 g / (m 2 · 24 hr · atm), after packaging the fruits and vegetables, the water generated from the fruits and vegetables will go out of the bag, and the water of the fruits and vegetables gradually loses It is not preferable because it loses loneliness.
また、本発明に係る収納袋は、各種の青果物（特に、長イモ、サツマイモ、ブドウ等の袋内が過湿状態となったときにカビが成長しやすく、かつ、酸素による酸化変色がしやすい上に、重量および体積が大きなもの）を収納可能なものであるが、鮮度保持性を良好なものとするために、収納袋の内面が防曇性を有していることが好ましい。防曇性を付与する方法は、特に限定されるものではないが、収納袋を形成する合成樹脂原料中に予め防曇剤を含有させても良いし、収納袋の内面となるフィルム面に、防曇剤をコーティングしても良い。ここで用いる防曇剤としては、非イオン系の界面活性剤をあげることができ、防曇性と併せて帯電防止性を発揮するものを用いるのが好ましい。 In addition, the storage bag according to the present invention is susceptible to mold growth when the inside of a bag of various fruits and vegetables (especially long potatoes, sweet potato, grapes, etc. is over-humidified, and is susceptible to oxidative discoloration due to oxygen). In addition, although it is possible to store one having a large weight and volume), it is preferable that the inner surface of the storage bag has an antifogging property in order to improve the freshness retention. The method for imparting the antifogging property is not particularly limited, but an antifogging agent may be previously contained in the synthetic resin raw material forming the storage bag, or the film surface to be the inner surface of the storage bag is You may coat an antifogging agent. As the antifogging agent to be used here, a nonionic surfactant can be mentioned, and it is preferable to use one which exhibits antistatic properties in combination with the antifogging property.
そのような防曇剤としては、多価アルコールの脂肪酸エステル類、高級脂肪酸のアミン類、高級脂肪酸のアマイド類、ショ糖脂肪酸エステル類、高級脂肪酸のアミンやアマイドのエチレンオキサイド付加物等の非イオン系の界面活性剤を挙げることができる。そして、それらの防曇剤の中でも、ポリオキシエチレンアルキルアミン型、ポリオキシエチレンアルキルアミン脂肪酸エステル型、脂肪酸グリセリンエステル型を併用するのが好ましい。また、ポリビニルアルコール等の水溶性樹脂をコーティング剤として用いても良い。 As such antifogging agents, nonionic agents such as fatty acid esters of polyhydric alcohol, amines of higher fatty acids, amides of higher fatty acids, sucrose fatty acid esters, amines of higher fatty acids and ethylene oxide adducts of amides Mention may be made of surfactants of the system. And among these antifogging agents, it is preferable to use a polyoxyethylene alkylamine type, a polyoxyethylene alkylamine fatty acid ester type, and a fatty acid glycerin ester type in combination. In addition, a water-soluble resin such as polyvinyl alcohol may be used as the coating agent.
加えて、合成樹脂フィルムを形成する樹脂には、必要に応じて各層の特性を阻害しない範囲で、熱安定剤、酸化防止剤、光安定剤、滑剤、核剤、難燃剤、顔料、染料、炭酸カルシウム、硫酸バリウム、水酸化マグネシウム、マイカ、タルク、クレー、酸化亜鉛、酸化マグネシウム、酸化アルミニウム、抗菌剤、自然分解性を付与する添加剤等を添加することができる。さらに、熱可塑性樹脂、熱可塑性エラストマー、ゴム類、炭化水素樹脂、石油樹脂等を合成樹脂フィルムの特性を害さない範囲で配合してもよい。その他、量子論に基いた物質変性等の処理をすることも可能である。 In addition, the resin forming the synthetic resin film may be, if necessary, a heat stabilizer, an antioxidant, a light stabilizer, a lubricant, a nucleating agent, a flame retardant, a pigment, a dye, to the extent that the properties of each layer are not impaired. Calcium carbonate, barium sulfate, magnesium hydroxide, mica, talc, clay, zinc oxide, magnesium oxide, aluminum oxide, an antibacterial agent, an additive that imparts natural degradability, and the like can be added. Furthermore, thermoplastic resins, thermoplastic elastomers, rubbers, hydrocarbon resins, petroleum resins and the like may be blended within the range that does not impair the characteristics of the synthetic resin film. In addition, it is also possible to perform processing such as substance modification based on quantum theory.
また、本発明に係る収納袋の形状は、特に限定されず、左右および下部をヒートシールしてなる三方袋や、二つ折りされた合成樹脂フィルムの左右をヒートシールしてなる二方袋等の形状にすることが可能である。 Further, the shape of the storage bag according to the present invention is not particularly limited, and a three-way bag formed by heat sealing left and right and lower part, a two-side bag formed by heat sealing right and left of a folded synthetic resin film, etc. It is possible to shape it.
以下、実施例・比較例によって本発明に係る鮮度保持用収納袋について詳細に説明するが、本発明の収納袋は、かかる実施例の態様に何ら限定されるものではなく、本発明の趣旨を逸脱しない範囲で、適宜変更することが可能である。また、実施例および比較例における物性、特性の評価方法は以下の通りである。 Hereinafter, the storage bag according to the present invention will be described in detail by way of examples and comparative examples, but the storage bag of the present invention is not limited to the aspect of such examples, and the spirit of the present invention is not limited thereto. It is possible to change suitably in the range which does not deviate. Moreover, the evaluation method of the physical property in an Example and a comparative example and a characteristic is as follows.
＜引張弾性率＞
各実施例および比較例で用いた合成樹脂フィルムを、長さ１５０ｍｍ、幅１５ｍｍにサンプリングし、温度２３℃、相対湿度６５％の雰囲気下で２４時間に亘って調湿した。そして、温度２３℃、相対湿度６５％の条件下で、ＪＩＳ Ｋ−７１２７に準拠し、東洋ボールドウィン株式会社製「テンシロン」（ＳＴＭ−Ｔ−５０ＢＰ）を用い、調湿したフィルムを１００ｍｍの距離を隔てたチャック間に掴み、引張速度２００ｍｍ／分で引っ張り、引張比例限度内における引張応力とそれに対応するひずみとの比を、引張弾性率として算出した。
<Tensile modulus>
The synthetic resin films used in each of the examples and comparative examples were sampled to a length of 150 mm and a width of 15 mm, and conditioned for 24 hours under an atmosphere of a temperature of 23 ° C. and a relative humidity of 65%. Then, under the conditions of a temperature of 23 ° C. and a relative humidity of 65%, according to JIS K-7127, using a “Tensiron” (STM-T-50BP) manufactured by Toyo Baldwin Co., Ltd., a 100 mm distance film The chuck was held between the separated chucks, pulled at a tensile speed of 200 mm / min, and the ratio of the tensile stress to the corresponding strain within the tensile proportional limit was calculated as the tensile modulus.
＜引張伸度＞
各実施例および比較例で用いた合成樹脂フィルムを、長さ１００ｍｍ、幅１５ｍｍにサンプリングし、温度２３℃、相対湿度６５％の雰囲気下で２４時間に亘って調湿した。そして、温度２３℃、相対湿度６５％の条件下で、ＪＩＳ Ｋ−７１２７に準拠し、東洋ボールドウィン株式会社製「テンシロン」（ＳＴＭ−Ｔ−５０ＢＰ）を用い、該試験片の両端をチャック間距離が５０ｍｍとなるように取り付け、引張速度２００ｍｍ／分としてサンプルを伸長し、破断した際のチャック間距離と伸長前のチャック間距離との比（百分率）を引張伸度として算出した。
<Tensile elongation>
The synthetic resin films used in the respective examples and comparative examples were sampled to a length of 100 mm and a width of 15 mm, and conditioned for 24 hours under an atmosphere of a temperature of 23 ° C. and a relative humidity of 65%. Then, under the conditions of a temperature of 23 ° C. and a relative humidity of 65%, in accordance with JIS K-7127, using “Tensilon” (STM-T-50BP) manufactured by Toyo Baldwin Co., Ltd. The sample was stretched at a tensile speed of 200 mm / min, and the ratio (percentage) of the distance between chucks at break and the distance between chucks before extension was calculated as the tensile elongation.
＜酸素透過度＞
各実施例・比較例の合成樹脂フィルムよりなる収納袋（袋サイズが高さ（袋の深さ方向の長さ）×幅＝２００ｍｍ×２００ｍｍの二方シール袋）を準備し、その上端の開口部を、約７．０ｍｍの幅でヒートシール（その他の部分と同じ温度でのヒートシール）をして、収納袋を密封し、その収納袋の中央部に粘着剤付きのゴム板を貼り付け、ゴム板部分に注射針を刺して、収納袋内部の空気を抜いた後、１００％の窒素ガス（１気圧）で充満させた。これを２５℃の大気中に放置した際の経過時間と収納袋内の酸素ガス濃度の変化を測定して酸素透過度を求めた。なお、表１における酸素透過度は、単位面積（１ｍ２）の２４時間当たりの酸素ガスの透過量（ｃｃ）を示したものである。
<Oxygen permeability>
Prepare a storage bag (a bag size is height (length in the depth direction of the bag) x width = 200 mm x 200 mm two-sided sealed bag) made of the synthetic resin film of each example and comparative example, and the opening of the upper end Heat seal the heat sink (heat seal at the same temperature as the other parts) with a width of about 7.0 mm, seal the storage bag, and attach a rubber plate with adhesive to the center of the storage bag Then, the rubber plate portion was pierced with an injection needle, air in the storage bag was evacuated, and then filled with 100% nitrogen gas (1 atm). The oxygen permeability was determined by measuring the elapsed time when this was left in the atmosphere at 25 ° C. and the change in the oxygen gas concentration in the storage bag. The oxygen permeability in Table 1 indicates the permeation amount (cc) of oxygen gas per 24 hours per unit area (1 m 2 ).
＜水蒸気透過度＞
各実施例および比較例で用いた合成樹脂フィルムを、４０℃、９０％ＲＨの条件で、ＪＩＳ Ｚ０２０８に準拠し、アルミニウム材の透湿カップを用いて合成樹脂フィルムの水蒸気の透過量を測定した。なお、表１における水蒸気透過度は、単位面積（１ｍ２）の２４時間当たりの水蒸気の透過量（ｇ）を示したものである。
<Water vapor permeability>
The amount of water vapor transmission of the synthetic resin film was measured using a moisture-permeable cup of an aluminum material according to JIS Z0208 under the conditions of 40 ° C. and 90% RH, using the synthetic resin film used in each example and comparative example. . In addition, the water vapor transmission rate in Table 1 shows the permeation amount (g) of water vapor per 24 hours per unit area (1 m 2 ).
＜防曇性＞
各実施例および比較例で用いた合成樹脂フィルムの防曇性を、次の手順にて測定した。
（１）５００ｍＬの上部開口容器に５０℃の温水を３００ｍＬ入れる。
（２）フィルムの防曇性測定面を内側にしてフィルムで容器開口部を密閉する。
（３）５℃の冷室中に放置する。
（４）５℃の冷室に放置３０分後、冷室から取り出し、フィルム測定面の露付着状況を６段階で評価する。
・６：全面露なし（付着面積ゼロ）
・５：若干の露付着（付着面積１／５まで）
・４：多少の露付着（付着面積１／４まで）
・３：約１／２の露付着（付着面積２／４まで）
・２：ほとんど露付着（付着面積３／４まで）
・１：全面露付着（付着面積３／４以上）
<Anti-fog property>
The antifogging property of the synthetic resin film used in each Example and Comparative Example was measured in the following procedure.
(1) Put 300 mL of hot water at 50 ° C. in a 500 mL upper open container.
(2) The container opening is sealed with the film with the antifogging measurement surface of the film inside.
(3) Leave in a 5 ° C. cold room.
(4) After leaving in a cold room at 5 ° C. for 30 minutes, take it out of the cold room and evaluate the dew adhesion state of the film measurement surface in six stages.
・ 6: There is no dew on the entire surface (zero attached area)
・ 5: Some dew adhesion (up to 1/5 of adhesion area)
・ 4: Some dew adhesion (up to adhesion area 1/4)
・ 3: about 1/2 dew adhesion (up to 2/4 adhesion area)
・ 2: Almost dew adhesion (up to 3/4 adhesion area)
・ 1: whole surface dew adhesion (adhesion area 3/4 or more)
＜含気量＞
実施例・比較例の合成樹脂フィルムよりなる収納袋（二方袋）に、長イモを収納する際に、作業者の手によってできる限り空気が入り込まないようにしながら収納して上端の開口部をヒートシールした（密封した）。しかる後、シリンダー式のガス採取器を利用して内部に残留した空気の量を測定し、その数値を含気量とした。
<Air content>
When the long potato is stored in the storage bag (two-way bag) made of the synthetic resin film of the embodiment and the comparative example, it is stored while keeping the air as small as possible by the hand of the operator and the opening at the upper end Heat sealed (sealed). Thereafter, the amount of air remaining inside was measured using a cylinder-type gas collector, and the value was taken as the air content.
＜鮮度保持効果＞
実施例・比較例の合成樹脂フィルムよりなる収納袋に長イモ、ブドウ（マスカット）、サツマイモ、カットレタス、ホウレンソウを収納した場合の鮮度保持効果を以下の方法にて評価した。
［長イモ］
実施例・比較例の合成樹脂フィルムよりなる収納袋（袋サイズが高さ（袋の深さ方向の長さ）×幅＝４４０ｍｍ×１００ｍｍの二方シール袋）に、約５００ｇの長イモを詰めた後に、その収納袋の上端の開口部を、約７．０ｍｍの幅でヒートシール（その他の部分と同じ温度でのヒートシール）することによって収納袋を密封した。そして、その長イモを収納した収納袋を、２０℃×６０％ＲＨの雰囲気下にて、１０日間（２４０時間）放置した後に、収納された長イモの状態を、色および臭気の観点から下記の５段階で官能評価した。
５：色・臭気において収納前のものとの違いがまったく認められない。
４：若干乾燥した様子であるものの、変色・異臭が認められない。
３：わずかな変色、微かな異臭が認められる。
２：全体的な変色、明確な異臭が認められる。
１：変色の程度が酷く、刺激性の高い異臭がする。
<Freshness holding effect>
The freshness retention effect when the long potato, grape (muscat), sweet potato, cut lettuce, and spinach were stored in the storage bag made of the synthetic resin film of the example and the comparative example was evaluated by the following method.
[Long potato]
About 500 g of long potatoes are packed in a storage bag (the bag size is height (length in the depth direction of the bag) × width = 440 mm × 100 mm) made of the synthetic resin film of the example and the comparative example. After that, the storage bag was sealed by heat sealing the opening at the upper end of the storage bag with a width of about 7.0 mm (heat sealing at the same temperature as the other parts). Then, after leaving the storage bag containing the long potato for 10 days (240 hours) in an atmosphere of 20 ° C. × 60% RH, the state of the stored long potato is described below from the viewpoint of color and odor The sensory evaluation was performed in five stages.
5: No difference in color and odor from those before storage.
4: Although it seems to be slightly dried, no discoloration or offensive odor is observed.
3: Slight discoloration and slight offensive odor are observed.
2: Overall discoloration, distinct off-flavor is observed.
1: The degree of discoloration is severe and the odor is highly irritating.
［ブドウ（ピオーネ）］
実施例・比較例の合成樹脂フィルムよりなる収納袋（袋サイズが高さ（袋の深さ方向の長さ）×幅＝３５０ｍｍ×１８０ｍｍの二方シール袋）に、約２００ｇのブドウ（ピオーネ）を詰めた後に、その収納袋の上端の開口部を、約７．０ｍｍの幅でヒートシール（その他の部分と同じ温度でのヒートシール）することによって収納袋を密封した。そして、そのブドウを収納した収納袋を、８℃×３０％ＲＨの雰囲気下にて、３５日間（８４０時間）放置した後に、収納されたブドウの状態を、味、萎びおよびカビの発生の観点から下記の５段階で官能評価した。
５：味・萎び、カビの発生について収納前のものとの違いがまったく認められない。
４：若干乾燥した様子であるものの、収納前のものと味の違いはなく、カビの発生も認められない。
３：わずかに炭酸の刺激を感じる味がするとともに、若干の萎びが認められ、微かなカビの発生も認められる。
２：炭酸の刺激を感じる味がするとともに、萎びが明確に認められ、カビの発生も認められる。
１：萎び、カビ発生の程度が酷い（味の検知不能）。
[Grapes (Pione)]
About 200 g of grape (Pione) in a storage bag made of synthetic resin film of Example and Comparative Example (bag size is height (length in the depth direction of bag × width = 350 mm × 180 mm two-way sealed bag) The storage bag was sealed by heat sealing the opening at the upper end of the storage bag to a width of about 7.0 mm (heat sealing at the same temperature as the other parts). Then, after leaving the storage bag containing the grapes for 35 days (840 hours) in an atmosphere of 8 ° C. × 30% RH, the state of the stored grapes is evaluated from the viewpoint of taste, wither and mold. The sensory evaluation was performed in the following five steps.
5: The difference between the taste, withering, and the occurrence of mold was not observed at all.
4: Although it looks a bit dry, there is no difference in taste from that before storage, and no occurrence of mold is observed.
3: Slightly carbonated taste is felt, some wilting is observed, and slight mold formation is also observed.
2: Taste that feels a stimulus of carbonation, withering is clearly recognized, and generation of mold is also recognized.
1: The degree of withering and mold generation is severe (taste can not be detected).
［サツマイモ］
実施例・比較例の合成樹脂フィルムよりなる収納袋（袋サイズが高さ（袋の深さ方向の長さ）×幅＝２７０ｍｍ×１８０ｍｍの二方シール袋）に、約６００ｇのサツマイモを詰めた後に、その収納袋の上端の開口部を、約７．０ｍｍの幅でヒートシール（その他の部分と同じ温度でのヒートシール）することによって収納袋を密封した。そして、そのサツマイモを収納した収納袋を、上記した長イモの鮮度保持効果の試験と同様の条件下で１９日間（４５６時間）放置した後に、収納されたサツマイモの状態を、色、萎び、カビの発生の観点から下記の５段階で官能評価した。
５：変色・萎び、カビの発生について収納前のものとの違いがまったく認められない。
４：若干乾燥した様子であるものの、収納前のものと色の変化はなく、カビの発生も認められない。
３：わずかに変色が認められるとともに、若干の萎びが認められ、微かなカビの発生も認められる。
２：変色と萎びが明確に認められ、カビの発生も認められる。
１：変色、萎び、カビ発生の程度が酷い。
[sweet potato]
About 600 g of sweet potato was packed in a storage bag (bag size is height (length in the depth direction of the bag) × width = 270 mm × 180 mm two-sided sealed bag) made of the synthetic resin film of the example and comparative example Later, the storage bag was sealed by heat sealing the opening at the upper end of the storage bag to a width of about 7.0 mm (heat sealing at the same temperature as the other parts). And after leaving the storage bag which stored the sweet potato for 19 days (456 hours) on the same conditions as the test of the freshness maintenance effect of the long potato mentioned above, the state of the stored sweet potato is colored, withering, mold The sensory evaluation was performed in the following five steps from the viewpoint of the occurrence of
5: Discoloration, withering, occurrence of mold, no difference from that before storage.
4: Although it looks a bit dry, there is no change in color from the one before storage, and no occurrence of mold is observed.
3: Slight discoloration, slight wilting, and slight mold formation are also observed.
2: Discoloration and wilt are clearly recognized, and the occurrence of mold is also recognized.
1: The degree of discoloration, wilt and mold generation is severe.
［カットレタス］
実施例・比較例の合成樹脂フィルムよりなる収納袋（袋サイズが高さ（袋の深さ方向の長さ）×幅＝１７０ｍｍ×１８０ｍｍの二方シール袋）に、約１００ｇのカットレタス（概ね５０ｍｍ×５０ｍｍの大きさより小さく裁断したもの）を詰めた後に、その収納袋の上端の開口部を、約７．０ｍｍの幅でヒートシール（その他の部分と同じ温度でのヒートシール）することによって収納袋を密封した。そして、そのカットレタスを収納した収納袋を、５℃×３０％ＲＨの雰囲気下にて、５日間（１２０時間）放置した後に、収納されたカットレタスの状態（色、臭気）を、長イモの鮮度保持効果の試験と同様の基準で評価した。
[Cut lettuce]
About 100 g of cut lettuce (generally, a storage bag made of synthetic resin film of Example and Comparative Example (bag size is height (length in the depth direction of bag × width = 170 mm × 180 mm two-sided sealed bag)) After packing smaller than 50 mm × 50 mm), heat seal the opening at the upper end of the storage bag to a width of about 7.0 mm (heat seal at the same temperature as the other parts) The storage bag was sealed. Then, after leaving the storage bag containing the cut lettuce in an atmosphere of 5 ° C. × 30% RH for 5 days (120 hours), the state (color, odor) of the cut lettuce stored is a long potato. It evaluated by the same standard as the examination of the freshness maintenance effect of.
［ホウレンソウ］
実施例・比較例の合成樹脂フィルムよりなる収納袋（袋サイズが高さ（袋の深さ方向の長さ）×幅＝３４０ｍｍ×２３０ｍｍの二方シール袋）に、約２００ｇのホウレンソウを詰めた後に、その収納袋の上端の開口部を、約７．０ｍｍの幅でヒートシール（その他の部分と同じ温度でのヒートシール）することによって収納袋を密封した。そして、そのホウレンソウを収納した収納袋を、上記した長イモの鮮度保持効果の試験と同様の条件下で４日間（９６時間）放置した後に、放置した後に、収納されたホウレンソウの状態（色、臭気）を、長イモの鮮度保持効果の試験と同様の基準で評価した。
[Spinach]
About 200 g of spinach was packed in a storage bag (bag size is height (length in the depth direction of the bag) × width = 340 mm × 230 mm two-side sealed bag) made of the synthetic resin film of the example and comparative example. Later, the storage bag was sealed by heat sealing the opening at the upper end of the storage bag to a width of about 7.0 mm (heat sealing at the same temperature as the other parts). Then, after the storage bag containing the spinach is left for 4 days (96 hours) under the same conditions as the test of the freshness holding effect of the long potato described above, the state of the stored spinach (color, Odor) was evaluated on the same basis as the test of the freshness keeping effect of long potato.
［実施例１］
厚さ３２μｍのポリエチレンテレフタレートフィルム（１２μｍの二軸延伸ポリエチレンテレフタレートフィルムからなる基材層に、溶融させたポリエチレンテレフタレート樹脂を約２０μｍの厚みとなるように積層させてヒートシール層を形成した積層ポリエチレンテレフタレートフィルム（中本パックス株式会社製ＨＳ−ＰＥＴ））を二つ折りしつつ矩形に裁断して、その左右を約２３０℃の温度で５ｍｍ幅のヒートシールすることによって、上部を開口した長方形状の二方袋を製造した。ここで、収納袋の大きさは、中に入れる青果物にあわせ、適宜最適なものを準備した。なお、当該ポリエチレンテレフタレートフィルムの内面には、防曇剤である非イオン系の界面活性剤がコーティングされている。また、製造された二方袋は、幅方向が構成材料である長尺なポリエチレンテレフタレートフィルムの長手方向となっており、高さ方向が構成材料である長尺なポリエチレンテレフタレートフィルムの幅方向となっている。
Example 1
A laminated polyethylene terephthalate in which a heat seal layer is formed by laminating a melted polyethylene terephthalate resin on a substrate layer consisting of a 32 μm thick polyethylene terephthalate film (12 μm biaxially stretched polyethylene terephthalate film) to a thickness of about 20 μm. The film (Juhon Pax Co., Ltd. HS-PET) is folded in half and cut into a rectangle, and the left and right sides are heat sealed at a temperature of about 230 ° C. at a width of 5 mm The bag was manufactured. Here, the size of the storage bag was appropriately selected according to the fruits and vegetables to be contained. The inner surface of the polyethylene terephthalate film is coated with a nonionic surfactant that is an antifogging agent. Also, in the manufactured two-way bag, the width direction is the longitudinal direction of the long polyethylene terephthalate film which is the constituent material, and the height direction is the width direction of the long polyethylene terephthalate film which is the constituent material ing.
一方、二方袋の製造に使用した合成樹脂フィルム（ポリエチレンテレフタレートフィルム）の酸素透過度、水蒸気透過度、比重、縦方向および横方向の引張弾性率、引張伸度等の各特性を、上記した方法によって測定した。また、得られた二方袋の鮮度保持特性を、上記した方法によって評価した。得られた結果を、合成樹脂フィルムの各特性の測定結果とともに表１に示す。 On the other hand, the properties of the synthetic resin film (polyethylene terephthalate film) used in the production of the two-sided bag, such as oxygen permeability, water vapor permeability, specific gravity, tensile modulus in the longitudinal direction and transverse direction, tensile elongation, etc. It measured by the method. Moreover, the freshness retention characteristic of the obtained two-sided bag was evaluated by the above-mentioned method. The obtained result is shown in Table 1 with the measurement result of each characteristic of a synthetic resin film.
［実施例２］
収納袋の原料の合成樹脂フィルムを、厚さ２５μｍのポリ乳酸フィルム（三菱樹脂株式会社社製ＳＧ１０６）に変更するとともにヒートシール温度を約１４０℃としたした以外は、実施例１と同様にして収納袋を製造した。なお、当該ポリ乳酸フィルムの内面には、実施例１のポリエチレンテレフタレートフィルムと同様な非イオン系の界面活性剤がコーティングされている。そして、得られた二方袋の鮮度保持特性を、実施例１と同様な方法によって評価した。また、二方袋の製造に用いた合成樹脂フィルムの酸素透過度、水蒸気透過度、比重、縦方向および横方向の引張弾性率、引張伸度等の各特性を、実施例１と同様な方法によって測定した。二方袋の鮮度保持特性の評価結果を、合成樹脂フィルムの各特性の測定結果とともに表１に示す。
Example 2
In the same manner as in Example 1 except that the synthetic resin film used as the material of the storage bag was changed to a 25 μm-thick polylactic acid film (SG106 manufactured by Mitsubishi Resins Co., Ltd.) and the heat seal temperature was about 140 ° C. A storage bag was manufactured. The inner surface of the polylactic acid film is coated with a nonionic surfactant similar to that of the polyethylene terephthalate film of Example 1. And the freshness retention characteristic of the obtained two-sided bag was evaluated by the same method as Example 1. In addition, the same method as in Example 1 was used for the respective properties of the synthetic resin film used in the production of the two-sided bag, such as oxygen permeability, water vapor permeability, specific gravity, tensile modulus in longitudinal and transverse directions, and tensile elongation. Measured by The evaluation results of the freshness holding characteristics of the two-sided bag are shown in Table 1 together with the measurement results of the respective characteristics of the synthetic resin film.
［比較例１］
収納袋の原料の合成樹脂フィルムを、厚さ４０μｍの二軸延伸ポリプロピレン（ＯＰＰ）フィルム（東洋紡株式会社製Ｐ５５６２）に変更するとともにヒートシール温度を約１５０℃としたした以外は、実施例１と同様にして収納袋を製造した。そして、得られた二方袋の鮮度保持特性を、実施例１と同様な方法によって評価した。また、二方袋の製造に用いた合成樹脂フィルムの酸素透過度、水蒸気透過度、比重、縦方向および横方向の引張弾性率、引張伸度等の各特性を、実施例１と同様な方法によって測定した。二方袋の鮮度保持特性の評価結果を、合成樹脂フィルムの各特性の測定結果とともに表１に示す。
Comparative Example 1
Example 1 was repeated except that the synthetic resin film used as the material of the storage bag was changed to a 40 μm thick biaxially oriented polypropylene (OPP) film (P5562 manufactured by Toyobo Co., Ltd.) and the heat seal temperature was set to about 150 ° C. A storage bag was manufactured in the same manner. And the freshness retention characteristic of the obtained two-sided bag was evaluated by the same method as Example 1. In addition, the same method as in Example 1 was used for the respective properties of the synthetic resin film used in the production of the two-sided bag, such as oxygen permeability, water vapor permeability, specific gravity, tensile modulus in longitudinal and transverse directions, and tensile elongation. Measured by The evaluation results of the freshness holding characteristics of the two-sided bag are shown in Table 1 together with the measurement results of the respective characteristics of the synthetic resin film.
［比較例２］
収納袋の原料の合成樹脂フィルムを、厚さ２５μｍの未延伸ポリプロピレン（ＣＰＰ）フィルム（東洋紡株式会社製Ｐ１１２８）に変更するとともにヒートシール温度を約１３０℃とした以外は、実施例１と同様にして収納袋を製造した。そして、得られた二方袋の鮮度保持特性を、実施例１と同様な方法によって評価した。また、二方袋の製造に用いた合成樹脂フィルムの酸素透過度、水蒸気透過度、比重、縦方向および横方向の引張弾性率、引張伸度等の各特性を、実施例１と同様な方法によって測定した。二方袋の鮮度保持特性の評価結果を、合成樹脂フィルムの各特性の測定結果とともに表１に示す。
Comparative Example 2
The same as Example 1, except that the synthetic resin film used as the material of the storage bag is changed to a 25 μm thick unstretched polypropylene (CPP) film (P1128 manufactured by Toyobo Co., Ltd.) and the heat seal temperature is about 130 ° C. Storage bag was manufactured. And the freshness retention characteristic of the obtained two-sided bag was evaluated by the same method as Example 1. In addition, the same method as in Example 1 was used for the respective properties of the synthetic resin film used in the production of the two-sided bag, such as oxygen permeability, water vapor permeability, specific gravity, tensile modulus in longitudinal and transverse directions, and tensile elongation. Measured by The evaluation results of the freshness holding characteristics of the two-sided bag are shown in Table 1 together with the measurement results of the respective characteristics of the synthetic resin film.
［比較例３］
収納袋の原料の合成樹脂フィルムを、厚さ４０μｍの低密度ポリエチレン（ＬＤＰＥ）フィルム（タマポリ株式会社製ＶＥ−７）に変更するとともにヒートシール温度を約１００℃とした以外は、実施例１と同様にして収納袋を製造した。そして、得られた二方袋の鮮度保持特性を、実施例１と同様な方法によって評価した。また、二方袋の製造に用いた合成樹脂フィルムの酸素透過度、水蒸気透過度、比重、縦方向および横方向の引張弾性率、引張伸度等の各特性を、実施例１と同様な方法によって測定した。二方袋の鮮度保持特性の評価結果を、合成樹脂フィルムの各特性の測定結果とともに表１に示す。
Comparative Example 3
Example 1 and Example 1 except that the synthetic resin film as the raw material of the storage bag is changed to a low density polyethylene (LDPE) film (VE-7 manufactured by Tamapoly Co., Ltd.) having a thickness of 40 μm and the heat seal temperature is set to about 100 ° C. A storage bag was manufactured in the same manner. And the freshness retention characteristic of the obtained two-sided bag was evaluated by the same method as Example 1. In addition, the same method as in Example 1 was used for the respective properties of the synthetic resin film used in the production of the two-sided bag, such as oxygen permeability, water vapor permeability, specific gravity, tensile modulus in longitudinal and transverse directions, and tensile elongation. Measured by The evaluation results of the freshness holding characteristics of the two-sided bag are shown in Table 1 together with the measurement results of the respective characteristics of the synthetic resin film.
［比較例４］
収納袋の原料の合成樹脂フィルムを、ナイロンの基層上にＰＥの熱融着層を積層してなる厚さ７０μｍの積層ナイロン−ポリエチレンフィルム（クリロン化成株式会社製ナイロンポリ彊美人）に変更するとともにヒートシール温度を約１００℃とした以外は、実施例１と同様にして収納袋を製造した。そして、得られた二方袋の鮮度保持特性を、実施例１と同様な方法によって評価した。また、二方袋の製造に用いた合成樹脂フィルムの酸素透過度、水蒸気透過度、比重、縦方向および横方向の引張弾性率、引張伸度等の各特性を、実施例１と同様な方法によって測定した。二方袋の鮮度保持特性の評価結果を、合成樹脂フィルムの各特性の測定結果とともに表１に示す。
Comparative Example 4
While changing the synthetic resin film of the raw material of the storage bag into a 70 μm thick laminated nylon-polyethylene film (nylon poly resin beauty manufactured by Krylon Kasei Co., Ltd.) formed by laminating a heat fusion layer of PE on a base layer of nylon A storage bag was manufactured in the same manner as in Example 1 except that the heat seal temperature was set to about 100 ° C. And the freshness retention characteristic of the obtained two-sided bag was evaluated by the same method as Example 1. In addition, the same method as in Example 1 was used for the respective properties of the synthetic resin film used in the production of the two-sided bag, such as oxygen permeability, water vapor permeability, specific gravity, tensile modulus in longitudinal and transverse directions, and tensile elongation. Measured by The evaluation results of the freshness holding characteristics of the two-sided bag are shown in Table 1 together with the measurement results of the respective characteristics of the synthetic resin film.
表１から、酸素透過度、水蒸気透過度、縦方向および横方向の引張弾性率の各特性が請求項１の範囲内にある合成樹脂フィルムによって製造された実施例１，２の収納袋は、長イモ、ブドウ、サツマイモ等の袋内が過湿状態となったときにカビが成長しやすく、かつ、酸素による酸化変色がしやすい上に、重量および体積が大きな青果物を収納した場合の鮮度保持効果に優れていることが分かる。加えて、実施例１，２の収納袋は、長イモを収納した場合に内部に空気が残留しにくくなっており（含気量が低くなっており）、長イモに対して特に良好な鮮度保持効果を発現していることが分かる。これに対して、酸素透過度、水蒸気透過度、縦方向および横方向の引張弾性率の内のいずれかの特性が請求項１の範囲から外れた合成樹脂フィルムによって製造された比較例１〜４の収納袋は、鮮度保持機能が不良であることが分かる。 From Table 1, the storage bag of Examples 1 and 2 manufactured by the synthetic resin film in which each property of oxygen permeability, water vapor permeability, and longitudinal and transverse tensile elastic modulus is within the range of claim 1 is: Molds tend to grow when the inside of bags such as long potatoes, grapes and sweet potatoes are over-moisturized, and oxidation discoloration due to oxygen is likely to occur, and freshness is maintained when fruits and vegetables with large weight and volume are stored. It turns out that the effect is excellent. In addition, in the storage bags of Examples 1 and 2, when the long potato is stored, air is less likely to remain inside (the air content is low), and the freshness is particularly good for the long potato. It can be seen that the retention effect is expressed. On the other hand, Comparative Examples 1 to 4 produced by a synthetic resin film in which the characteristics of any of oxygen permeability, water vapor permeability, and tensile elastic modulus in the longitudinal direction and transverse direction are out of the range of claim 1 It can be understood that the storage bag of the present invention has a poor freshness holding function.
本発明に係る収納袋は、上記の如く優れた効果を奏するものであるため、特に、長イモ、ブドウ、サツマイモ等の袋内が過湿状態となったときにカビが成長しやすく、かつ、酸素による酸化変色がしやすい上に、重量および体積が大きな青果物の鮮度保持用の収納袋として好適に用いることができる。 Since the storage bag according to the present invention exhibits the excellent effects as described above, mold tends to grow particularly when the inside of the bag such as long potato, grape, sweet potato, etc. becomes over-humidified, and Besides being susceptible to oxidative discoloration due to oxygen, it can be suitably used as a storage bag for maintaining the freshness of fruits and vegetables having a large weight and volume.
Claims (4)
前記合成樹脂フィルムの酸素透過度が、１００ｃｃ／（ｍ２・２４ｈｒ・ａｔｍ）以上１，０００ｃｃ／（ｍ２・２４ｈｒ・ａｔｍ）未満であり、かつ、
前記合成樹脂フィルムの水蒸気透過度が、１５ｇ／（ｍ２・２４ｈｒ・ａｔｍ）以上５００ｇ／（ｍ２・２４ｈｒ・ａｔｍ）未満であるとともに、
前記合成樹脂フィルムの縦方向および横方向の引張弾性率が、いずれも２，５００Ｍｐａ以上５，０００Ｍｐａ未満であることを特徴とする青果物の鮮度保持用収納袋。 A storage bag for maintaining the freshness of fruits and vegetables formed of a synthetic resin film, wherein
The oxygen permeability of the synthetic resin film is 100 cc / (m 2 · 24 hr · atm) or more and less than 1,000 cc / (m 2 · 24 hr · atm), and
The water vapor transmission rate of the synthetic resin film is 15 g / (m 2 · 24 hr · atm) or more and less than 500 g / (m 2 · 24 hr · atm),
A storage bag for maintaining the freshness of fruits and vegetables, wherein the tensile elastic modulus in the longitudinal direction and the lateral direction of the synthetic resin film is at least 2,500 MPa and less than 5,000 MPa.
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