JP2002002824A - Packing material - Google Patents
Packing materialInfo
- Publication number
- JP2002002824A JP2002002824A JP2000193257A JP2000193257A JP2002002824A JP 2002002824 A JP2002002824 A JP 2002002824A JP 2000193257 A JP2000193257 A JP 2000193257A JP 2000193257 A JP2000193257 A JP 2000193257A JP 2002002824 A JP2002002824 A JP 2002002824A
- Authority
- JP
- Japan
- Prior art keywords
- oxygen
- packing material
- absorbing
- layer
- laminate
- 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.)
- Granted
Links
- 238000012856 packing Methods 0.000 title claims abstract description 95
- 239000000463 material Substances 0.000 title claims abstract description 90
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 85
- 239000001301 oxygen Substances 0.000 claims abstract description 85
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 85
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 230000035699 permeability Effects 0.000 claims abstract description 56
- 229920005672 polyolefin resin Polymers 0.000 claims description 14
- 239000005022 packaging material Substances 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 10
- 229920001225 polyester resin Polymers 0.000 claims description 6
- 229920006122 polyamide resin Polymers 0.000 claims description 5
- 239000004645 polyester resin Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 abstract description 23
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 23
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
- 239000012466 permeate Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 87
- 229920005989 resin Polymers 0.000 description 29
- 239000011347 resin Substances 0.000 description 29
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 17
- -1 polypropylene Polymers 0.000 description 15
- 230000004888 barrier function Effects 0.000 description 14
- 239000007789 gas Substances 0.000 description 14
- 238000007789 sealing Methods 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 11
- 239000011888 foil Substances 0.000 description 10
- 229920001684 low density polyethylene Polymers 0.000 description 9
- 239000004702 low-density polyethylene Substances 0.000 description 9
- 239000000843 powder Substances 0.000 description 9
- 229920005992 thermoplastic resin Polymers 0.000 description 9
- 239000004743 Polypropylene Substances 0.000 description 8
- 230000002745 absorbent Effects 0.000 description 8
- 239000002250 absorbent Substances 0.000 description 8
- 229920001155 polypropylene Polymers 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 238000004806 packaging method and process Methods 0.000 description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 6
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 5
- 239000012790 adhesive layer Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 229920001903 high density polyethylene Polymers 0.000 description 5
- 239000004700 high-density polyethylene Substances 0.000 description 5
- 239000005020 polyethylene terephthalate Substances 0.000 description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 description 5
- 239000011342 resin composition Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 description 4
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- 229920002647 polyamide Polymers 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 3
- 229920002292 Nylon 6 Polymers 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 235000010215 titanium dioxide Nutrition 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000009849 deactivation Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920000554 ionomer Polymers 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229920001748 polybutylene Polymers 0.000 description 2
- 229920005653 propylene-ethylene copolymer Polymers 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 238000006479 redox reaction Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 229920001862 ultra low molecular weight polyethylene Polymers 0.000 description 2
- 239000012463 white pigment Substances 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 102100032566 Carbonic anhydrase-related protein 10 Human genes 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 101000867836 Homo sapiens Carbonic anhydrase-related protein 10 Proteins 0.000 description 1
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 1
- 229920000571 Nylon 11 Polymers 0.000 description 1
- 229920000299 Nylon 12 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229920001179 medium density polyethylene Polymers 0.000 description 1
- 239000004701 medium-density polyethylene Substances 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 235000013324 preserved food Nutrition 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Packages (AREA)
- Wrappers (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、含水させた酸素吸
収性積層体の梱包材に関する。さらに詳しくは、梱包体
内の含水させた酸素吸収性積層体から発生する水素を効
果的に透過させ、水分の放散を効果的に防止することが
できる梱包材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing material for a water-containing oxygen-absorbing laminate. More specifically, the present invention relates to a packaging material that can effectively transmit hydrogen generated from a water-containing oxygen-absorbing laminate in a packaging body and effectively prevent the diffusion of moisture.
【０００２】[0002]
【従来の技術】従来、食品等の品質低下防止するため、
酸化還元反応を利用する酸素吸収剤を添加した樹脂層を
有する積層フィルムから成る包装袋等の包装容器が知ら
れている。しかしながら、かかる包装袋を単に乾燥食品
等に適用した場合には、酸化還元反応を生じさせて、酸
素吸収性を発揮するために必要な水分供給が困難であ
り、そのため酸素吸収性を有効に発揮できないという問
題が見られた。2. Description of the Related Art Conventionally, in order to prevent deterioration of the quality of foods,
2. Description of the Related Art Packaging containers such as packaging bags made of a laminated film having a resin layer to which an oxygen absorbent utilizing an oxidation-reduction reaction is added are known. However, when such a packaging bag is simply applied to dry foods, etc., it is difficult to supply the water necessary for exhibiting the oxygen-absorbing property by causing an oxidation-reduction reaction, thereby effectively exhibiting the oxygen-absorbing property. There was a problem that could not be done.
【０００３】そこで、特公平７−２１０８３号公報に
は、必要な水分量を供給するために親水性充填剤を内部
に含有せしめた酸素吸収性樹脂組成物からなるフィルム
製品が提案されている。かかるフィルム製品は、より具
体的には、熱可塑性樹脂１００重量部に対し、１００メ
ッシュ以上の鉄粉５０〜４００重量部、１００メッシュ
以上の塩化ナトリウム２重量部以上、親水性充填剤５重
量部以上を添加してなる酸素吸収性樹脂組成物を、溶融
してフィルムに成形した後、当該フィルムを常温または
加温下の水槽もしくは加湿槽に浸し、その後に付着水を
除去乾燥する処理を行って構成されるものである。しか
しながら含水させたフィルム製品は鉄粉が活性化してお
り、そのまま長期保管すると、空気中の酸素を吸収して
しまい、鉄粉が失活したり、含水せしめた水分が外部に
放散したりして、酸素吸収性能が著しく低下するという
問題が見られた。Therefore, Japanese Patent Publication No. 7-21083 proposes a film product comprising an oxygen-absorbing resin composition containing a hydrophilic filler therein for supplying a necessary amount of water. More specifically, such a film product is, for 100 parts by weight of a thermoplastic resin, 50 to 400 parts by weight of iron powder of 100 mesh or more, 2 parts by weight of sodium chloride of 100 mesh or more, and 5 parts by weight of a hydrophilic filler. After the oxygen-absorbing resin composition obtained by adding the above is melted and formed into a film, the film is immersed in a water bath or humidification bath at room temperature or under heating, and thereafter, a treatment for removing and drying attached water is performed. It is composed of However, iron powder is activated in water-containing film products, and if stored for a long period of time, it absorbs oxygen in the air, deactivating the iron powder and dispersing the water impregnated to the outside. However, there was a problem that the oxygen absorption performance was significantly reduced.
【０００４】そこで、特開平９−５１７８６号公報で
は、ガスバリヤー性のフィルムを梱包材として使用し、
溶着密封することが提案されている。しかしながら、梱
包材としてガスバリヤー性フィルムを使用すると、水素
透過性が低いため、酸素吸収性積層体における酸素吸収
層の金属鉄粉末と、水の反応に起因して発生する水素を
外部に効果的に放出することができなかった。そのた
め、梱包体が大きく膨張し（以下、水素膨張と称する場
合がある）、取り扱いが困難となり、酸素吸収性積層体
を所定の場所に保管することが困難になるという問題が
見られた。In Japanese Patent Application Laid-Open No. Hei 9-51786, a gas barrier film is used as a packing material.
Welding and sealing have been proposed. However, when a gas barrier film is used as a packing material, the hydrogen permeability is low, so that the metal iron powder of the oxygen absorbing layer in the oxygen absorbing laminate and the hydrogen generated due to the reaction of water are effectively removed to the outside. Could not be released. For this reason, there has been a problem that the package expands significantly (hereinafter, sometimes referred to as hydrogen expansion), handling becomes difficult, and it becomes difficult to store the oxygen-absorbing laminate in a predetermined place.
【０００５】[0005]
【発明が解決しようとする課題】以上のような状況下、
本発明の発明者は、かかる問題を鋭意検討したところ、
特定の酸素透過度および水蒸気透過度を有する梱包材を
使用して密封することにより、梱包体内の酸素吸収性積
層体における酸素吸収層から発生する水素を効果的に外
部に放出できると共に、上記酸素吸収層に含まれる水分
の放散を効果的に防止できることを見出した。すなわ
ち、本発明は、含水処理して酸素吸収層を活性化させた
酸素吸収性積層体を梱包した場合であっても、水素膨張
を効果的に抑制すると共に、上記酸素吸収層の酸素吸収
能力を低下させることなく、長期間に亘る優れた保存能
力を発揮する梱包材を提供するものである。Under the circumstances described above,
The inventor of the present invention diligently studied such a problem,
By sealing using a packing material having specific oxygen permeability and water vapor permeability, hydrogen generated from the oxygen absorbing layer in the oxygen-absorbing laminate in the package can be effectively released to the outside, and the oxygen It has been found that the dissipation of water contained in the absorbing layer can be effectively prevented. That is, the present invention effectively suppresses hydrogen expansion even when the oxygen-absorbing laminate in which the oxygen-absorbing layer has been activated by hydration treatment is packaged, and the oxygen-absorbing capacity of the oxygen-absorbing layer is improved. The present invention provides a packaging material that exhibits an excellent storage ability for a long period of time without lowering the storage capacity.
【０００６】[0006]
【課題を解決するための手段】本発明によれば、含水さ
せた酸素吸収性積層体を梱包するための梱包材におい
て、当該梱包材の酸素透過度（２５℃，０％ＲＨ測定条
件）を１０〜２０，０００ｃｍ3／（ｍ2・ｄａｙ・ａｔ
ｍ）とすると共に、当該梱包材の水蒸気透過度（４０
℃，９０％ＲＨ測定条件）を１００ｇ／（ｍ2・ｄａ
ｙ）以下とした梱包材が提供され、上述した問題を解決
することができる。すなわち、このような構成にするこ
とにより、前述した水素を効果的に外部に放出でき、そ
のため、梱包体の水素膨張を効果的に抑制することがで
き、また、上記した酸素吸収層に含まれる水分の放散を
有効に抑制することができ、そのため、酸素吸収性積層
体の酸素吸収性を長期間維持することができる。According to the present invention, in a packing material for packing an oxygen-absorbing laminate impregnated with water, the oxygen permeability (25 ° C., 0% RH measurement condition) of the packing material is determined. 10 to 20,000 cm 3 / (m 2 · day · at
m) and the water vapor transmission rate (40
100 ° C / (m 2 · da)
y) The following packing material is provided, and the above-mentioned problem can be solved. That is, with such a configuration, the above-described hydrogen can be effectively released to the outside, and therefore, the hydrogen expansion of the package can be effectively suppressed, and the hydrogen contained in the above-described oxygen absorbing layer can be contained. It is possible to effectively suppress the diffusion of moisture, and therefore, it is possible to maintain the oxygen-absorbing property of the oxygen-absorbing laminate for a long period of time.
【０００７】本発明の梱包材は、オレフィン系樹脂、ま
たはオレフィン系樹脂とポリアミド系樹脂、あるいはオ
レフィン系樹脂とポリエステル系樹脂の積層体から成る
ことが好ましい。このような樹脂から成る梱包材は、酸
素透過度や水蒸気透過度の調節が容易であり、そのた
め、含水させた酸素吸収性積層体から発生する水素をよ
り効果的に外部に放出できると共に、酸素吸収性積層体
における酸素吸収層の優れた酸素吸収性をより長期間維
持することができる。The packing material of the present invention is preferably made of an olefin resin, a laminate of an olefin resin and a polyamide resin, or a laminate of an olefin resin and a polyester resin. The packing material made of such a resin is easy to adjust the oxygen permeability and the water vapor permeability, so that hydrogen generated from the hydrated oxygen-absorbing laminate can be more effectively released to the outside, and The excellent oxygen absorbing property of the oxygen absorbing layer in the absorbent laminate can be maintained for a longer period.
【０００８】本発明の梱包材は、その厚さを３０〜２５
０μｍの範囲内とするのが好ましい。梱包材をこのよう
な厚さにすることより、梱包体内の含水させた酸素吸収
性積層体から発生する水素をより効果的に外部に放出で
きると共に、水分の放散を防止することができ、しかも
所定の機械的強度を得ることができる。The packing material of the present invention has a thickness of 30 to 25.
It is preferable that the thickness be in the range of 0 μm. By making the packing material such thickness, it is possible to more effectively release hydrogen generated from the hydrated oxygen-absorbing laminate inside the package to the outside, and to prevent the diffusion of water, and A predetermined mechanical strength can be obtained.
【０００９】また、本発明の梱包材は、ヒートシール性
を有することが好ましい。このようにヒートシール性を
備えることにより、梱包材同士を重ね合わせてヒートシ
ール（加熱および加圧）するだけで容易に袋状等の梱包
体とすることが可能で、酸素吸収性積層体を容易に梱包
することができる。Further, the packing material of the present invention preferably has heat sealing properties. By providing heat sealing properties in this way, it is possible to easily form a bag-like package simply by stacking and heat-sealing (heating and pressurizing) the packing materials. Can be easily packed.
【００１０】本発明の梱包材は、酸素透過度および水蒸
気透過度がそれぞれ異なる複数の材料から構成しても良
い。このように、酸素透過度および水蒸気透過度が異な
る複数の材料を使用することにより、梱包体内の含水さ
せた酸素吸収性積層体から発生する水素の放出と、水分
の放散及び酸素による失活のバランスをより容易に調整
することができると共に、後述する梱包材を梱包体とし
た時の内容積変化率を所定範囲内に容易に調節すること
ができる。[0010] The packaging material of the present invention may be composed of a plurality of materials having different oxygen permeability and water vapor permeability. As described above, by using a plurality of materials having different oxygen permeability and water vapor permeability, the release of hydrogen generated from the hydrated oxygen-absorbing laminate in the package, the release of moisture, and the deactivation of oxygen are prevented. The balance can be more easily adjusted, and the internal volume change rate when a packaging material described later is formed into a package can be easily adjusted within a predetermined range.
【００１１】また、本発明の梱包材を積層体で構成する
場合は、ヒートシール層を有するのが好ましい。この場
合、その積層体において、ヒートシール層を除く他の層
の材料をその性能に応じて種々選択して梱包材とし、ヒ
ートシールするだけで容易に袋状等の梱包体とすること
が可能で、酸素吸収性積層体を容易に梱包することがで
きる。When the packing material of the present invention is composed of a laminate, it preferably has a heat seal layer. In this case, in the laminate, a material other than the heat seal layer can be variously selected according to the performance thereof as a packing material, and the bag can be easily formed into a bag by simply heat sealing. Thus, the oxygen-absorbing laminate can be easily packed.
【００１２】本発明の梱包材は、含水させた酸素吸収性
積層体を梱包する梱包体とした時に、下記式（１）で表
わされる内容積変化率を６０〜１２０％とするのが好ま
しい。 Ｖ１＝Ｖ２／Ｖ３×１００ （１） Ｖ１：梱包体の内容積変化率（％） Ｖ２：２２℃、６０％ＲＨ条件で、３０日間保管後の梱
包体の内容積（ｃｍ3） Ｖ３：保管前の梱包体の内容積（ｃｍ3） このように梱包体の内容積変化率を所定値に制限するこ
とにより、梱包材を用いて袋状等の梱包体とした時の外
観変化を容易に調節することができる。When the packing material of the present invention is used as a packing body for packing a moisture-containing oxygen-absorbing laminate, the inner volume change rate represented by the following formula (1) is preferably 60 to 120%. V1 = V2 / V3 × 100 (1) V1: Inner volume change rate (%) of the package V2: Inner volume (cm 3 ) of the package after storage at 22 ° C. and 60% RH for 30 days V3: Storage Inner volume of previous package (cm 3 ) By limiting the rate of change of the inner volume of the package to a predetermined value in this manner, it is easy to change the appearance when the package is used to make a package such as a bag. Can be adjusted.
【００１３】[0013]
【発明の実施の形態】本発明の梱包材は、含水させた酸
素吸収性積層体を梱包するための梱包材であって、上記
梱包材の酸素透過度（２５℃，０％ＲＨ測定条件）を１
０〜２０，０００ｃｍ3／（ｍ2・ｄａｙ・ａｔｍ）とす
ると共に、上記梱包材の水蒸気透過度（４０℃，９０％
ＲＨ測定条件）を１００ｇ／（ｍ2・ｄａｙ）以下とす
る。その結果、梱包体とした時の水素膨張を効果的に抑
制すると共に、酸素吸収性積層体における酸素吸収層の
酸素吸収能力を低下させることなく、長期間に亘って優
れた保存能力を発揮する梱包材としたものである。以
下、本発明の梱包材について具体的に説明する。なお、
参照する図面は、この発明が理解できる程度に概略的に
示しており、図示された例に限定されるものではない。BEST MODE FOR CARRYING OUT THE INVENTION The packing material of the present invention is a packing material for packing an oxygen-absorbing laminate impregnated with water, the oxygen permeability of the packing material (25 ° C., 0% RH measurement conditions). 1
0 to 20,000 cm 3 / (m 2 · day · atm), and the water vapor permeability of the packing material (40 ° C., 90%
RH measurement condition) is set to 100 g / (m 2 · day) or less. As a result, while effectively suppressing hydrogen expansion when the package is used, the oxygen-absorbing layer of the oxygen-absorbing laminate exhibits excellent storage capability over a long period of time without reducing the oxygen-absorbing capability. It is a packaging material. Hereinafter, the packing material of the present invention will be specifically described. In addition,
The drawings referred to are schematically shown to the extent that the present invention can be understood, and are not limited to the illustrated examples.
【００１４】（１）酸素透過度 本発明の梱包材は、酸素透過度（２５℃，０％ＲＨ測定
条件）を１０〜２０，０００ｃｍ3／（ｍ2・ｄａｙ・ａ
ｔｍ）とすることが重要である。その理由は、一般的な
樹脂フィルムの酸素透過度と水素透過度との間には、図
６に示すような相関関係があり、かかる酸素透過度が１
０ｃｍ3／（ｍ2・ｄａｙ・ａｔｍ）未満となると、酸素
吸収性積層体における酸素吸収層の金属鉄粉末と、水の
反応に起因して発生する水素の梱包体からの透過が著し
く低下し、梱包体が激しく膨張する。一方、かかる酸素
透過度が２０，０００ｃｍ3／（ｍ2・ｄａｙ・ａｔｍ）
を超えると、活性化した酸素吸収性積層体が急激に酸素
を吸収するため、酸素吸収性積層体の酸素吸収性能を長
期に亘って維持することが困難になる。したがって、こ
のような梱包材の膨張抑制と、酸素吸収性積層体の酸素
吸収性能維持とのバランスをより良好にするため、梱包
材の酸素透過度を１００〜１０，５００ｃｍ3／（ｍ2・
ｄａｙ・ａｔｍ）とするのが好ましく、１０００〜１
０，０００ｃｍ3／（ｍ2・ｄａｙ・ａｔｍ）とするのが
さらに好ましい。例えば、酸素透過度が異なる梱包材を
用いた梱包体の時間変化による内容積変化率を図４に示
すが、酸素透過度が１０〜２０，０００ｃｍ3／（ｍ2・
ｄａｙ・ａｔｍ）の梱包材であれば、梱包体の時間変化
による内容積変化率を小さくすることができる。なお、
酸素透過度は、市販の酸素透過度測定装置（ＯＸ−ＴＲ
ＡＮ２１２０）（ＭＯＣＯＮ社製）を利用して、簡便に
測定することが可能である。(1) Oxygen Permeability The packing material of the present invention has an oxygen permeability (25 ° C., 0% RH measurement condition) of 10 to 20,000 cm 3 / (m 2 · day · a).
tm) is important. The reason is that there is a correlation as shown in FIG. 6 between the oxygen permeability and the hydrogen permeability of a general resin film.
If it is less than 0 cm 3 / (m 2 · day · atm), the permeation of the metallic iron powder of the oxygen absorbing layer in the oxygen absorbing layered product and the hydrogen generated by the reaction of water from the package significantly decreases. , The package expands violently. On the other hand, the oxygen permeability is 20,000 cm 3 / (m 2 · day · atm)
When it exceeds, the activated oxygen-absorbing laminate rapidly absorbs oxygen, and it becomes difficult to maintain the oxygen-absorbing performance of the oxygen-absorbing laminate for a long period of time. Therefore, in order to better balance such suppression of the expansion of the packing material and maintenance of the oxygen absorption performance of the oxygen-absorbing laminate, the oxygen permeability of the packing material is set to 100 to 10,500 cm 3 / (m 2 ···
day • atm), preferably 1000 to 1
More preferably, it is set to 0.000 cm 3 / (m 2 · day · atm). For example, FIG. 4 shows the rate of change in internal volume of a package using packing materials having different oxygen permeability with time, and the oxygen permeability is 10 to 20,000 cm 3 / (m 2 ···
(day · atm), the rate of change in the internal volume due to the time change of the package can be reduced. In addition,
The oxygen permeability is measured using a commercially available oxygen permeability measuring device (OX-TR).
AN2120) (manufactured by MOCON) can be easily measured.
【００１５】（２）水蒸気透過度 本発明の梱包材は、水蒸気透過度（４０℃，９０％ＲＨ
測定条件）を１００ｇ／（ｍ2・ｄａｙ）以下とするこ
とが重要である。この理由は、かかる水蒸気透過度が１
００ｇ／（ｍ2・ｄａｙ）を超えると、梱包材を透過可
能な水分が多くなって、酸素吸収性積層体に含まれる水
分が放散してしまい、該積層体を包装容器として用いた
際に、酸素吸収性能が著しく低下するためである。した
がって、かかる水蒸気透過度を５０ｇ／（ｍ2・ｄａ
ｙ）以下とするのが好ましく、３０ｇ／（ｍ2・ｄａ
ｙ）以下とするのがより好ましい。なお、水蒸気透過度
は、市販の水蒸気透過度測定装置（ＰＥＲＭＡＴＲＡＮ
−Ｗ３／３０）（ＭＯＣＯＮ社製）を利用して簡便に測
定することが可能である。(2) Water Vapor Permeability The packing material of the present invention has a water vapor permeability (40 ° C., 90% RH).
It is important that the measurement conditions) be 100 g / (m 2 · day) or less. The reason is that the water vapor permeability is 1
If it exceeds 00 g / (m 2 · day), the amount of water that can pass through the packing material increases, and the moisture contained in the oxygen-absorbing laminate is diffused. When the laminate is used as a packaging container, This is because oxygen absorption performance is significantly reduced. Therefore, the water vapor permeability is set to 50 g / (m 2 · da).
y) It is preferably at most 30 g / (m 2 · da)
y) More preferably: The water vapor permeability was measured using a commercially available water vapor permeability measuring device (PERMATRAN).
-W3 / 30) (manufactured by MOCON).
【００１６】（３）構成材料 また、本発明の梱包材の材料は特に制限されるものでは
ないが、例えば、酸素透過度や水蒸気透過度の調整が容
易な点から、オレフィン系樹脂、オレフィン系樹脂とポ
リアミド系樹脂、あるいはオレフィン系樹脂とポリエス
テル樹脂の積層体が挙げられる。この理由は、これらの
樹脂から成る梱包材であれば、酸素透過度や水蒸気透過
度の調整が容易であり、しかも、比較的低温でヒートシ
ールすることが可能なためである。より具体的には、オ
レフィン系樹脂として、低密度ポリエチレン（ＬＤＰ
Ｅ、分岐状低密度ポリエチレンと称する場合があ
る。）、直鎖状低密度ポリエチレン（ＬＬＤＰＥ）、高
密度ポリエチレン（ＨＤＰＥ）、ポリプロピレン、ポリ
１−ブテン、ポリ４−メチル−１−ペンテン等が挙げら
れ、いずれも単独、あるいは二種以上の積層体あるいは
混合物として使用しても良い。なお、オレフィン系樹脂
と積層するポリアミド系樹脂としては、ナイロン６、ナ
イロン６６、ナイロン６−１０、ナイロン１１、ナイロ
ン１２等が、また、ポリエステル樹脂としてはポリエチ
レンテレフタレート等が挙げられる。(3) Constituent Material The material of the packaging material of the present invention is not particularly limited. For example, olefin resins, olefin resins, and the like can be easily adjusted in terms of oxygen permeability and water vapor permeability. A laminate of a resin and a polyamide resin, or an olefin resin and a polyester resin is exemplified. The reason for this is that if the packing material is made of such a resin, it is easy to adjust the oxygen permeability and the water vapor permeability, and it is possible to heat seal at a relatively low temperature. More specifically, low-density polyethylene (LDP) is used as the olefin resin.
E. It may be referred to as a branched low-density polyethylene. ), Linear low-density polyethylene (LLDPE), high-density polyethylene (HDPE), polypropylene, poly 1-butene, poly 4-methyl-1-pentene, and the like. Alternatively, they may be used as a mixture. The polyamide resin laminated with the olefin resin includes nylon 6, nylon 66, nylon 6-10, nylon 11, nylon 12, and the like, and the polyester resin includes polyethylene terephthalate.
【００１７】（４）厚さ また、梱包材の厚さは３０乃至２５０μｍとするのが好
ましい。この理由は、梱包材の厚さが３０μｍ未満とな
ると、水分の外部放散を抑制することが困難となり、ま
た、機械的強度が低下するためである。一方、梱包材の
厚さが２５０μｍを超えると、酸素吸収性積層体から発
生する水素を効果的に外部に放出することが困難になる
ためである。したがって、梱包材の厚さは４０乃至２０
０μｍとするのがより好ましく、４５乃至１５０μｍと
するのがさらに好ましい。(4) Thickness The thickness of the packing material is preferably 30 to 250 μm. The reason for this is that if the thickness of the packing material is less than 30 μm, it is difficult to suppress the external diffusion of moisture, and the mechanical strength is reduced. On the other hand, if the thickness of the packing material exceeds 250 μm, it becomes difficult to effectively release hydrogen generated from the oxygen-absorbing laminate to the outside. Therefore, the thickness of the packing material is 40 to 20.
The thickness is more preferably 0 μm, and further preferably 45 to 150 μm.
【００１８】梱包材の厚さは、使用する材料の種類を考
慮して決定するのが好ましく、例えばオレフィン系樹
脂、あるいはオレフィン系樹脂とポリエステル系樹脂の
積層体を用いた場合には、機械的強度が相対的に乏しい
ために、梱包材の厚さを４０〜２５０μｍとするのが好
ましく、５０〜２００μｍとするのがより好ましい。ま
た、オレフィン系樹脂とポリアミド系樹脂の積層体を用
いた場合には、機械的強度が相対的に優れているため
に、梱包材の厚さを３０〜２００μｍとするのが好まし
く、３０〜１５０μｍとするのがより好ましい。The thickness of the packing material is preferably determined in consideration of the type of material to be used. For example, when an olefin resin or a laminate of an olefin resin and a polyester resin is used, mechanical Since the strength is relatively poor, the thickness of the packing material is preferably from 40 to 250 μm, more preferably from 50 to 200 μm. When a laminate of an olefin-based resin and a polyamide-based resin is used, the thickness of the packing material is preferably set to 30 to 200 μm, because the mechanical strength is relatively excellent, and 30 to 150 μm. More preferably,
【００１９】（５）複数の梱包材 また、梱包材が、酸素透過度および水蒸気透過度がそれ
ぞれ異なる複数の梱包材（例えば、第１の梱包材および
第２の梱包材）からなることが好ましい。この理由は、
例えば、酸素透過度および水蒸気透過度の値が比較的大
きい第１の梱包材と、酸素透過度および水蒸気透過度の
値が比較的小さい第２の梱包材とから梱包材を構成する
ことにより、含水させた酸素吸収性積層体から発生する
水素の放出と、酸素吸収性積層体に含まれる水分放散の
バランスの調整がより容易となるためである。(5) Plural Packing Materials It is preferable that the packing material comprises a plurality of packing materials (for example, a first packing material and a second packing material) having different oxygen permeability and water vapor permeability. . The reason for this is
For example, by forming a packing material from a first packing material having relatively large values of oxygen permeability and water vapor permeability and a second packing material having relatively small values of oxygen permeability and water vapor permeability, This is because it is easier to adjust the balance between the release of hydrogen generated from the water-containing oxygen-absorbing laminate and the diffusion of moisture contained in the oxygen-absorbing laminate.
【００２０】すなわち、例えば、上記梱包材を用いて、
以下のような構成の梱包材とすることが好ましい。 第１の梱包材と、第２の梱包材とを側方部分で繋ぎ合
わせ、１つの梱包体とする。 第１の梱包材が酸素吸収性積層体の表面側に位置する
ように配置し、第２の梱包材が酸素吸収性積層体の背面
側に位置するように配置した後、それぞれをヒートシー
ルし、１つの梱包体とする。 酸素透過度および水蒸気透過度の値が小さい第２の梱
包材の表面に、酸素透過度および水蒸気透過度の値が比
較的大きい第１の梱包材を部分的に積層し、１つの梱包
体とする。That is, for example, using the above packing material,
It is preferable to use a packing material having the following configuration. The first packing material and the second packing material are connected at a side portion to form one package. After the first packing material is arranged so as to be located on the front side of the oxygen-absorbing laminate and the second packing material is arranged so as to be located on the back side of the oxygen-absorbing laminate, each is heat-sealed. And one package. A first packing material having a relatively large value of oxygen permeability and water vapor permeability is partially laminated on a surface of a second packing material having a small value of oxygen permeability and water vapor permeability, and one package body is formed. I do.
【００２１】（６）梱包体の内容積変化率 本発明の梱包材を用いて梱包体とした時の前述した式
（１）で定義される内容積変化率は６０〜１２０％とす
るのが好ましい。この理由は、かかる内容積変化率が６
０％未満になると、長期保管の際に梱包体内の減圧度が
大きくなって梱包体の破損を生じる場合があり、一方、
かかる内容積変化率が１２０％を超えると、酸素吸収性
積層体を収納した梱包体の所定位置への保管が困難とな
り、また、長期保管の際に梱包体の破損が生じる場合が
有る。したがって、かかる梱包体の内容積変化率を７０
〜１１５％とするのがより好ましく、８０〜１１０％と
するのがさらに好ましい。(6) Rate of change in inner volume of package The rate of change in internal volume defined by the above-mentioned equation (1) when a package is formed using the packing material of the present invention should be 60 to 120%. preferable. The reason is that the internal volume change rate is 6
If it is less than 0%, the degree of decompression inside the package may increase during long-term storage, causing damage to the package.
If the internal volume change rate exceeds 120%, it becomes difficult to store the package containing the oxygen-absorbing laminate in a predetermined position, and the package may be damaged during long-term storage. Therefore, the internal volume change rate of such a package is set to 70%.
It is more preferably set to 115%, and further preferably set to 80 to 110%.
【００２２】（７）梱包方法 上述した梱包材を用いた酸素吸収性積層体の梱包方法は
特に制限されるものでなく、例えば、図１に示すよう
に、ロール状に巻き取った酸素吸収性積層体１、１０の
周囲を袋状に梱包するのが好ましい。また、酸素吸収性
積層体の周囲を袋状に梱包するに際し、２枚の梱包材を
用意し、ロール状の酸素吸収性積層体を挟んだ状態で四
方をヒートシールしても良い。あるいは、２枚の梱包材
を用意しておき、開口部を設けた状態で三方をヒートシ
ールし、予め袋状に梱包材を構成しておき、次いでロー
ル状の酸素吸収性積層体を収容したのち、さらに開口部
をヒートシールして梱包しても良い。(7) Packing Method The packing method of the oxygen-absorbing laminate using the above-described packing material is not particularly limited. For example, as shown in FIG. It is preferable that the periphery of the laminates 1 and 10 is packed in a bag shape. Further, when packing the periphery of the oxygen-absorbing laminate in a bag shape, two packing materials may be prepared, and heat sealing may be performed on all sides with the roll-shaped oxygen-absorbing laminate sandwiched. Alternatively, two packing materials were prepared, three sides were heat-sealed in a state where the opening was provided, the packing material was formed in a bag shape in advance, and then a roll-shaped oxygen-absorbing laminate was accommodated. Thereafter, the opening may be further heat-sealed and packed.
【００２３】［含水させた酸素吸収性積層体］本発明の
梱包材で梱包される含水させた酸素吸収性積層体１は、
図２および図３に示すような構成であることが好まし
い。すなわち、図２に示すように、内層（ヒートシール
層）２、還元鉄粉等の酸素吸収剤を配合した酸素吸収層
３、ガスバリヤー層５、及び外層（保護層）６とを基本
的に含むと共に、任意構成成分として、内層２と酸素吸
収層３の間に第１の接着剤層４ａと、ガスバリヤー層５
と外層の間に第２の接着剤層４ｂを含んでなる酸素吸収
性積層体１であるのが好ましい。また、図３に示すよう
に、酸素吸収層３とガスバリヤー層５との間に、上記酸
素吸収層３の還元鉄粉等の酸化による体積膨張時の鉄類
の露出、接着性低下を防止すると共に、外観特性を向上
させるために平坦化層７を設けた酸素吸収性積層体１０
とするのが好ましい。[Hydrogen-containing oxygen-absorbing laminate] The hydrated oxygen-absorbing laminate 1 packed with the packing material of the present invention comprises:
Preferably, the configuration is as shown in FIGS. That is, as shown in FIG. 2, an inner layer (heat seal layer) 2, an oxygen absorbing layer 3 containing an oxygen absorbent such as reduced iron powder, a gas barrier layer 5, and an outer layer (protective layer) 6 are basically formed. The first adhesive layer 4a and the gas barrier layer 5 between the inner layer 2 and the oxygen absorbing layer 3 are included as optional components.
It is preferable that the oxygen-absorbing laminate 1 includes a second adhesive layer 4b between the first adhesive layer and the outer layer. Further, as shown in FIG. 3, between the oxygen absorbing layer 3 and the gas barrier layer 5, the exposure of irons and the decrease in adhesiveness at the time of volume expansion due to oxidation of the reduced iron powder or the like in the oxygen absorbing layer 3 are prevented. And an oxygen-absorbing laminate 10 provided with a planarizing layer 7 to improve appearance characteristics.
It is preferred that
【００２４】上記酸素吸収性積層体の内層としては、ヒ
ートシール性を有し、耐湿性に優れた熱可塑性樹脂を使
用することが好ましい。この内層を構成する樹脂として
は、例えば、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、直鎖状低密度ポリエチレン
（ＬＬＤＰＥ）、超低密度ポリエチレン、ポリプロピレ
ン、ポリプロピレン−エチレン共重合体、ポリブテン−
１、ポリ４−メチルペンテン−１、エチレン−酢酸ビニ
ル共重合体（ＥＶＡ）、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樹脂が挙げられる。こ
れらはいずれも単独、あるいは二種以上の混合物として
使用することができる。As the inner layer of the oxygen-absorbing laminate, it is preferable to use a thermoplastic resin having heat sealing properties and excellent moisture resistance. Examples of the resin constituting the inner layer include low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-density polyethylene (LLDPE), ultra-low-density polyethylene, polypropylene, polypropylene-ethylene copolymer, and polybutene-
1, polyolefin resins such as poly-4-methylpentene-1, ethylene-vinyl acetate copolymer (EVA), ethylene-ethyl acrylate copolymer (EEA), and ion-crosslinked olefin copolymer (ionomer). These can be used alone or as a mixture of two or more.
【００２５】そして、上記内層には、酸素吸収層の還元
性鉄粉による着色を隠蔽する目的で、隠蔽剤、例えば二
酸化チタン等の白色顔料を配合することが好ましい。ま
た、隠蔽剤の配合量を、内層の構成樹脂１００重量部当
たり、１〜２０重量部の範囲内の値とすることが好まし
い。その理由は、かかる隠蔽剤の配合量が１重量部未満
となると、隠蔽性が低下し、一方、かかる隠蔽剤の配合
量が２０重量部を超えると、均一に分散することが困難
となるためである。It is preferable that a shielding agent, for example, a white pigment such as titanium dioxide is blended in the inner layer for the purpose of concealing the coloring of the oxygen absorbing layer by the reducing iron powder. Further, the blending amount of the concealing agent is preferably set to a value within a range of 1 to 20 parts by weight per 100 parts by weight of the constituent resin of the inner layer. The reason is that when the amount of the concealing agent is less than 1 part by weight, the concealing property is reduced. On the other hand, when the amount of the concealing agent is more than 20 parts by weight, it is difficult to disperse uniformly. It is.
【００２６】また、内層の厚さは、５乃至２５０μｍと
することが好ましく、その理由は、内層の厚さが５μｍ
未満となると酸素吸収性が早期に失活すると共にヒート
シール性が低下し、一方、内層の厚さが２５０μｍを超
えると酸素吸収性やヒートシール性が低下するため、内
層の厚さは１０乃至１００μｍとするのがより好まし
く、１５乃至５０μｍとするのがさらに好ましい。The thickness of the inner layer is preferably 5 to 250 μm, because the thickness of the inner layer is 5 μm.
When the thickness is less than 1, the oxygen absorbing property is deactivated at an early stage and the heat sealing property is reduced. On the other hand, when the thickness of the inner layer exceeds 250 μm, the oxygen absorbing property and the heat sealing property are reduced. The thickness is more preferably 100 μm, and further preferably 15 to 50 μm.
【００２７】また、上記酸素吸収性積層体に用いる酸素
吸収層は、還元鉄粉及び塩から成る酸素吸収剤を配合し
た熱可塑性樹脂から成る。この場合、還元鉄粉の粒径は
１〜１００μｍが好ましく、その形態は偏平状、球状等
で、特に偏平状が酸素吸収層と隣接する層との接着性の
点で好ましい。本発明に用いる塩は、一般に水溶性のも
のであり、特に還元鉄粉の酸化促進の観点からハロゲン
化金属が好適に使用される。The oxygen-absorbing layer used in the oxygen-absorbing laminate is made of a thermoplastic resin containing an oxygen absorbent composed of reduced iron powder and salt. In this case, the particle size of the reduced iron powder is preferably 1 to 100 μm, and the form is a flat shape, a spherical shape, or the like, and the flat shape is particularly preferable in view of the adhesiveness between the oxygen absorbing layer and the adjacent layer. The salt used in the present invention is generally water-soluble, and a metal halide is preferably used particularly from the viewpoint of accelerating the oxidation of the reduced iron powder.
【００２８】酸素吸収層に用いる熱可塑性樹脂として
は、例えば、低密度ポリエチレン、直鎖状低密度ポリエ
チレン（ＬＬＤＰＥ）、超低密度ポリエチレン、高密度
ポリエチレン、ポリプロピレン、ポリプロピレン−エチ
レン共重合体、ポリブテン−１、ポリ４−メチルペンテ
ン−１、エチレン−酢酸ビニル共重合体（ＥＶＡ）、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
フィン系樹脂、エチレン−プロピレンゴム（ＥＰＲ）や
エチレン−プロピレン−ジエンゴム（ＥＰＤＭ）等の熱
可塑性エラストマー等あるいはこれらの混合物が、酸素
を迅速に吸収し、優れた酸素透過性を有する点から好ま
しい。As the thermoplastic resin used for the oxygen absorbing layer, for example, low density polyethylene, linear low density polyethylene (LLDPE), ultra low density polyethylene, high density polyethylene, polypropylene, polypropylene-ethylene copolymer, polybutene 1, polyolefin resins such as poly-4-methylpentene-1, ethylene-vinyl acetate copolymer (EVA), ethylene-ethyl acrylate copolymer (EEA), and ion-crosslinked olefin copolymer (ionomer); Thermoplastic elastomers such as propylene rubber (EPR) and ethylene-propylene-diene rubber (EPDM) and mixtures thereof are preferable because they rapidly absorb oxygen and have excellent oxygen permeability.
【００２９】酸素吸収層を構成する酸素吸収性樹脂組成
物は、熱可塑性樹脂１００重量部当たり、酸素吸収剤１
〜２００重量部を含有するものであることが好ましい。
この理由は、酸素吸収剤の含有量が上記範囲よりも少な
い場合には、酸素吸収性能が低下する場合があり、一方
酸素吸収剤の含有量が、上記範囲よりも多い場合には、
酸素吸収性樹脂組成物の成形性が低下する場合がある。
したがって、より好ましくは、熱可塑性樹脂１００重量
部当たり、酸素吸収剤５〜１００重量部を含有する酸素
吸収性樹脂組成物である。The oxygen-absorbing resin composition constituting the oxygen-absorbing layer contains the oxygen-absorbing agent per 100 parts by weight of the thermoplastic resin.
It is preferable that the composition contains about 200 parts by weight.
The reason is that when the content of the oxygen absorbent is smaller than the above range, the oxygen absorption performance may be reduced, while when the content of the oxygen absorbent is larger than the above range,
The moldability of the oxygen-absorbing resin composition may decrease.
Therefore, more preferably, the oxygen-absorbing resin composition contains 5 to 100 parts by weight of the oxygen absorbent per 100 parts by weight of the thermoplastic resin.
【００３０】配合組成物において、酸素吸収剤は還元鉄
粉と塩との混合比率（重量比）を１００：０．１〜１０
０：３０とするのが好ましく、１００：１〜１００：１
０とするのがより好ましい。その理由は、還元鉄粉と塩
との混合比率を上記範囲内とすることにより、優れた酸
素吸収速度が得られるためである。In the blended composition, the oxygen absorbent has a mixing ratio (weight ratio) of reduced iron powder and salt of 100: 0.1 to 10
0:30 is preferable, and 100: 1 to 100: 1
More preferably, 0 is set. The reason is that by setting the mixing ratio of the reduced iron powder and the salt within the above range, an excellent oxygen absorption rate can be obtained.
【００３１】酸素吸収層の厚さは、酸素吸収性積層体に
要求される酸素吸収量や成形方法によっても相違する
が、当該厚さを１０乃至２００μｍとするのが好まし
く、１２乃至１００μｍとするのがより好ましく、１５
乃至７０μｍとするのがさらに好ましい。その理由は、
酸素吸収層の厚さが１０μｍ未満となると、酸素吸収剤
の相対量が低下し、長期間にわたって酸素吸収性能を持
続することが困難となる場合があるためであり、一方、
酸素吸収層の厚さが２００μｍを超えると、ヒートシー
ル時に、前記酸素吸収層がはみ出して外観不良となるた
めである。The thickness of the oxygen-absorbing layer varies depending on the amount of oxygen absorption required for the oxygen-absorbing laminate and the forming method, but is preferably 10 to 200 μm, and more preferably 12 to 100 μm. More preferably, 15
More preferably, the thickness is from 70 to 70 μm. The reason is,
When the thickness of the oxygen absorbing layer is less than 10 μm, the relative amount of the oxygen absorbing agent decreases, and it may be difficult to maintain the oxygen absorbing performance for a long period of time.
If the thickness of the oxygen-absorbing layer exceeds 200 μm, the oxygen-absorbing layer protrudes during heat sealing, resulting in poor appearance.
【００３２】上記酸素吸収性積層体のガスバリヤー層と
しては、金属箔、ガスバリヤー性樹脂、あるいは無機蒸
着樹脂フィルムを用いることができる。金属箔として
は、アルミニウムやアルミニウム合金等の軽金属箔、鉄
箔、ブリキ箔、表面処理鋼箔等のスチール箔が挙げられ
る。ガスバリヤー樹脂としては、低い酸素透過係数を有
し、且つ熱成形可能な熱可塑性樹脂が好ましい。このよ
うなガスバリヤー性樹脂としては、エチレン−ビニルア
ルコール共重合体、ポリアミド類等を挙げることができ
る。さらに、無機蒸着樹脂フィルムとしては、シリカ、
アルミナ等を蒸着した樹脂フィルムを挙げることができ
る。無機蒸着樹脂フィルムを使用する場合は蒸着側を内
面側として積層体を構成する。すなわち蒸着層がバリヤ
ー層となり、樹脂フィルム層が後述する外層となる。As the gas barrier layer of the oxygen-absorbing laminate, a metal foil, a gas barrier resin, or an inorganic vapor-deposited resin film can be used. Examples of the metal foil include light metal foils such as aluminum and aluminum alloys, iron foils, tin foils, and steel foils such as surface-treated steel foils. As the gas barrier resin, a thermoplastic resin having a low oxygen permeability coefficient and being thermoformable is preferable. Examples of such a gas barrier resin include an ethylene-vinyl alcohol copolymer and polyamides. Further, as the inorganic vapor-deposited resin film, silica,
A resin film on which alumina or the like is deposited can be given. When an inorganic vapor-deposited resin film is used, the laminate is formed with the vapor-deposited side on the inner surface side. That is, the vapor deposition layer becomes a barrier layer, and the resin film layer becomes an outer layer described later.
【００３３】上記酸素吸収性積層体の外層としては、熱
可塑性樹脂の連続層（非通気性樹脂層）から成るものが
全て使用できる。この外層を構成する樹脂としては、例
えば、低密度ポリエチレン、高密度ポリエチレン、ポリ
プロピレン等のポリオレフィン、ナイロン６，等のポリ
アミド、あるいはポリエチレンテレフタレート等のポリ
エステルが挙げられる。一般に、外層用熱可塑性樹脂
は、内層用樹脂に比して強度、耐突き刺し性や耐熱性に
優れたものを用いるのが適当であり、この目的のため
に、一軸あるいは二軸方向に延伸されたオレフィン系樹
脂、ナイロン系樹脂、ポリエステル系樹脂等のフィルム
が好適に使用される。As the outer layer of the oxygen-absorbing laminate, any layer composed of a continuous layer of thermoplastic resin (impermeable layer) can be used. Examples of the resin constituting the outer layer include low density polyethylene, high density polyethylene, polyolefins such as polypropylene, polyamides such as nylon 6, and polyesters such as polyethylene terephthalate. In general, it is appropriate to use a thermoplastic resin for the outer layer that is superior in strength, puncture resistance and heat resistance as compared with the resin for the inner layer, and for this purpose, is stretched uniaxially or biaxially. Films such as olefin-based resins, nylon-based resins, and polyester-based resins are preferably used.
【００３４】上記酸素吸収性積層体において、酸素吸収
層とガスバリヤー層の積層に際して、酸素吸収層の表面
に酸素吸収粒子による凹凸が形成されるため、接着不
良、外観不良を生じる場合があり、これを防止するため
に平坦化層を介在させることが好ましい。このような平
坦化樹脂としては、前述した酸素吸収樹脂層に用いられ
る樹脂と同種のものが挙げられる。また、平坦化層の厚
みは、２乃至１００μｍとするのが好ましく、２μｍ未
満であると酸素吸収層の表面に形成される凹凸を吸収す
ることが困難となり、一方、１００μｍを越えるとヒー
トシール時に、平坦化層がはみ出して外観不良となる。
従って、平坦化層の厚さは、３乃至５０μｍとするのが
より好ましく、５乃至２５μｍとするのがさらに好まし
い。なお、上述したガスバリヤー層として、透明、半透
明のエチレン−ビニルアルコール共重合体、ポリアミド
類等から成る樹脂フィルム、あるいはシリカ等を蒸着し
た樹脂フィルム等を用いた場合は、上記平坦化層に、内
層と同様に酸素吸収層の還元鉄粉による着色を隠蔽する
目的で、隠蔽材、例えば二酸化チタン等の白色顔料を配
合することが好ましい。In the above-described oxygen-absorbing laminate, when the oxygen-absorbing layer and the gas barrier layer are laminated, irregularities due to oxygen-absorbing particles are formed on the surface of the oxygen-absorbing layer, which may cause poor adhesion and poor appearance. In order to prevent this, it is preferable to interpose a flattening layer. As such a flattening resin, the same type of resin as used in the above-described oxygen absorbing resin layer can be used. Further, the thickness of the flattening layer is preferably 2 to 100 μm, and if it is less than 2 μm, it becomes difficult to absorb irregularities formed on the surface of the oxygen absorbing layer. Then, the flattening layer protrudes and the appearance becomes poor.
Therefore, the thickness of the flattening layer is more preferably 3 to 50 μm, and still more preferably 5 to 25 μm. As the above-mentioned gas barrier layer, when a transparent, translucent ethylene-vinyl alcohol copolymer, a resin film made of polyamides or the like, or a resin film or the like on which silica or the like is deposited, the flattening layer is used. As with the inner layer, it is preferable to blend a concealing material, for example, a white pigment such as titanium dioxide, for the purpose of concealing the coloring of the oxygen absorbing layer by the reduced iron powder.
【００３５】また、本発明の梱包材で包装する酸素吸収
性積層体は、具体的に下記式（２）で定義される含水量
を０．１乃至２５ｇ／ｍ2とするのが好ましく、このよ
うな構成にすることにより、乾燥食品等に適用した場
合、酸素吸収性能を定量的に発揮することができる。な
お、かかる含水量は、具体的に、以下の式（２）で定義
される。 Ｗ１＝（Ｗ２−Ｗ３）／Ａ （２） Ｗ１：含水量（ｇ／ｍ2） Ｗ２：含水させた酸素吸収性積層体重量（ｇ） Ｗ３：乾燥時（温度７０℃、圧力１×１０-3Ｐａ以下、
２４時間）の酸素吸収性積層体重量（ｇ） Ａ ：酸素吸収性積層体の面積（ｍ２）The oxygen-absorbing laminate packaged with the packing material of the present invention preferably has a water content specifically defined by the following formula (2) of 0.1 to 25 g / m 2. With such a configuration, when applied to dried foods and the like, oxygen absorption performance can be exerted quantitatively. The water content is specifically defined by the following equation (2). W1 = (W2-W3) / A (2) W1: Water content (g / m 2 ) W2: Weight of water-containing oxygen-absorbing laminate (g) W3: Drying (temperature 70 ° C., pressure 1 × 10 −) 3 Pa or less,
24 hours) Oxygen-absorbing laminate weight (g) A: Area of oxygen-absorbing laminate (m 2 )
【００３６】[0036]
【実施例】本発明の梱包材を実施例及び比較例に基づい
て詳細に説明する。EXAMPLES The packing material of the present invention will be described in detail based on examples and comparative examples.
【００３７】［実施例１］ ［梱包材］ 厚さ：１００μｍの直鎖低密度ポリエチレン樹脂（ＬＬ
ＤＰＥ） 酸素透過度（２５℃，０％ＲＨ測定条件）：１８００ｃ
ｍ3／（ｍ2・ｄａｙ・ａｔｍ） 水蒸気透過度（４０℃，９０％ＲＨ測定条件）：６ｇ／
（ｍ2・ｄａｙ） 上記梱包材を用いて、三方をヒートシールして６５０ｍ
ｍ×６５０ｍｍの袋状の梱包体を作成した。Example 1 [Packaging Material] Linear low-density polyethylene resin (LL: 100 μm thick)
DPE) Oxygen permeability (25 ° C, 0% RH measurement conditions): 1800c
m 3 / (m 2 · day · atm) Water vapor transmission rate (40 ° C., 90% RH measurement conditions): 6 g /
(M 2 · day) 650 m
An mx650 mm bag-like package was prepared.
【００３８】［酸素吸収性積層体］図２に示す層構成の
酸素吸収性積層体を、下記した材料を用いて作成した。 外層：ポリエチレンテレフタレートフィルム（１２μ
ｍ） ガスバリヤー層：アルミ箔（７μｍ） 接着剤：ウレタン系接着剤 平坦化層：厚さ１０μｍのＬＤＰＥからなる接着補助層 酸素吸収層層：ＬＤＰＥ１００重量部当たり、４３重量
部の還元鉄粉（平均粒径２５μｍ）と、０．９重量部の
塩化ナトリウムとを配合した組成物（厚さ２５μｍ） 内層：ＬＤＰＥ１００重量部当たり、平均粒径２．５μ
ｍの酸化チタン（チタン白）を１５重量部配合した組成
物（厚さ２０μｍの隠蔽層）[Oxygen-absorbing laminate] An oxygen-absorbing laminate having the layer structure shown in FIG. 2 was prepared using the following materials. Outer layer: polyethylene terephthalate film (12μ
m) Gas barrier layer: aluminum foil (7 μm) Adhesive: urethane-based adhesive Flattening layer: adhesion auxiliary layer made of LDPE having a thickness of 10 μm Oxygen absorption layer: 43 parts by weight of reduced iron powder per 100 parts by weight of LDPE ( Composition containing 25 parts by weight of sodium chloride and an average particle diameter of 2.5 μm per 100 parts by weight of LDPE.
composition containing 15 parts by weight of titanium oxide (titanium white) having a thickness of 20 μm (concealing layer having a thickness of 20 μm)
【００３９】上記酸素吸収性積層体を１５５ｍｍ幅にス
リットした内層表面に、塗布量として１．４ｇ／ｍ2の
滅菌水を塗布して、長さ１０００ｍの酸素吸収性積層体
をロール状に巻き取った。The surface of the inner layer obtained by slitting the oxygen-absorbing laminate to a width of 155 mm is coated with sterilized water having a coating amount of 1.4 g / m 2 , and the oxygen-absorbing laminate having a length of 1000 m is wound into a roll. I took it.
【００４０】次いで、上記梱包体に酸素吸収性積層体を
梱包し、３５℃−１０％ＲＨ，３日間の条件で放置し、
酸素吸収性積層体に塗布した水を含水させるためにエー
ジングした。Then, the oxygen-absorbing laminate was packed in the above-mentioned package, and left at 35 ° C.-10% RH for 3 days.
Aging was carried out in order to contain the water applied to the oxygen-absorbing laminate.
【００４１】［実施例２］梱包材として、厚さ３０μｍ
のポリプロピレンフィルムと、厚さ１５μｍのポリアミ
ド樹脂（ナイロン６）とからなる複合フィルムを用いた
ほかは、実施例１と同様に、含水させた酸素吸収性積層
体を作製して、パッケージングして評価した。[Example 2] As a packing material, a thickness of 30 µm was used.
A water-containing oxygen-absorbing laminate was prepared and packaged in the same manner as in Example 1, except that a composite film composed of a polypropylene film of No. 6 and a polyamide resin (nylon 6) having a thickness of 15 μm was used. evaluated.
【００４２】［実施例３］梱包材として、厚さ５０μｍ
のポリプロピレンフィルムと、厚さ１２μｍのポリエチ
レンテレフタレート樹脂とからなる複合フィルムを用い
たほかは、実施例１と同様に、含水させた酸素吸収性積
層体を作製して、パッケージングして評価した。Example 3 A packing material having a thickness of 50 μm
A water-containing oxygen-absorbing laminate was prepared, packaged and evaluated in the same manner as in Example 1 except that a composite film composed of a polypropylene film of No. 1 and a polyethylene terephthalate resin having a thickness of 12 μm was used.
【００４３】［比較例１］梱包材として、厚さ３０μｍ
のポリプロピレンフィルムと、厚さ１５μｍのポリエチ
レンビニルアルコール共重合体とからなる複合フィルム
を用いたほかは、実施例１と同様に、含水させた酸素吸
収性積層体を作製して、パッケージングして評価した。[Comparative Example 1] As a packing material, a thickness of 30 µm
A hydrated oxygen-absorbing laminate was prepared and packaged in the same manner as in Example 1, except that a composite film composed of a polypropylene film and a 15 μm-thick polyethylene vinyl alcohol copolymer was used. evaluated.
【００４４】［比較例２］梱包材として、厚さ３０μｍ
のポリプロピレンフィルム、厚さ７μｍのアルミニム箔
及び厚さ１２μｍのポリエチレンテレフタレートフィル
ムとから成る複合フィルムを用いたほかは、実施例１と
同様に、含水させた酸素吸収性積層体を作製して、パッ
ケージングして評価した。Comparative Example 2 As a packing material, a thickness of 30 μm
A hydrated oxygen-absorbing laminate was prepared in the same manner as in Example 1, except that a composite film composed of a polypropylene film, a 7 μm-thick aluminum foil and a 12 μm-thick polyethylene terephthalate film was used. And evaluated.
【００４５】［比較例３］梱包材として、厚さ５０μｍ
のポリ４−メチルペンテン−１フィルムを用いたほか
は、実施例１と同様に、含水させた酸素吸収性積層体を
作製して、パッケージングして評価した。Comparative Example 3 As a packing material, a thickness of 50 μm was used.
A water-containing oxygen-absorbing laminate was prepared, packaged and evaluated in the same manner as in Example 1, except that the poly-4-methylpentene-1 film was used.
【００４６】［比較例４］梱包材として、厚さ５０μｍ
のポリメチルメタアクリレートフィルムを用いたほか
は、実施例１と同様に、含水させた酸素吸収性積層体を
作製して、パッケージングして評価した。Comparative Example 4 As a packing material, a thickness of 50 μm was used.
A water-containing oxygen-absorbing laminate was prepared, packaged and evaluated in the same manner as in Example 1, except that the polymethyl methacrylate film was used.
【００４７】（１）梱包材の評価 梱包体（内容積変化率）の測定 酸素吸収性積層体の梱包時における酸素吸収層から発生
する水素による膨張を確認するため、前述した式（１）
で定義される梱包材の内容積変化率（Ｖ１）を所定時間
ごとに測定した。なお、式（１）中、Ｖ２およびＶ３で
表わされる梱包材の内容積は、それぞれ水を満たした容
器内に当該梱包体を浸漬させ、外部にこぼれた水の体積
から算出した。(1) Evaluation of Packing Material Measurement of Package (Rate of Change in Inner Volume) In order to confirm the expansion due to hydrogen generated from the oxygen absorbing layer during packing of the oxygen-absorbing laminate, the above-mentioned formula (1) was used.
Was measured at predetermined time intervals. In addition, in Formula (1), the internal volume of the packaging material represented by V2 and V3 was calculated by immersing the packaging body in a container filled with water, and spilling the water to the outside.
【００４８】残存能力 梱包後の酸素吸収性積層体における残存能力を確認する
ため、以下の式（３）で定義される上記残存能力（％）
を測定した。 Ｖ１＝Ｖ２／Ｖ３×１００ （３） Ｖ１：酸素吸収性積層体の残存能力（％） Ｖ２：２２℃、６０％ＲＨ条件で、３０日間保管後の酸
素吸収性積層体の酸素吸収性能（ｃｍ3／ｃｍ2） Ｖ３：保管前の酸素吸収性積層体の酸素吸収性能（ｃｍ
3／ｃｍ2） なお、酸素吸収性積層体の酸素吸収性能は、次ぎのよう
にして測定した。すなわち、ガス不透過性カップ（内容
量８７ｍｌ）に、含水させた酸素吸収性積層体より切り
出した試験片（２０×１５０ｍｍ）３枚と、カップ内を
２０％ＲＨに調湿するため９５ｗｔ％グリセリン水溶液
２ｍｌを入れ、ガス不透過性のアルミニウム箔ラミネー
トフィルム製のヒートシール蓋材で加熱密封した。これ
を２２℃で７日間保存し、容器内の酸素濃度をガスクロ
マトグラフ装置を用いて分析し、フィルム単位面積当た
りの酸素吸収量を算出した。また、式（３）で定義され
る酸素吸収性積層体の残存能力（％）が９０％以上の値
であれば、実用上許容範囲の酸素吸収性能を有してお
り、残存能力（％）が９５％以上の値であれば、実用上
優れた酸素吸収性能を有している。上記した実施例及び
比較例の酸素透過度及び水蒸気透過度の相違による内容
積変化率、残存能力の評価結果を表１および図４に示
す。Residual Capacity In order to confirm the residual capacity of the oxygen-absorbing laminate after packing, the residual capacity (%) defined by the following equation (3)
Was measured. V1 = V2 / V3 × 100 (3) V1: Remaining capacity (%) of oxygen-absorbing laminate V2: Oxygen-absorbing performance (cm) of oxygen-absorbing laminate after storage at 22 ° C. and 60% RH for 30 days 3 / cm 2 ) V3: oxygen absorption performance of the oxygen-absorbing laminate before storage (cm
3 / cm 2 ) The oxygen absorption performance of the oxygen-absorbing laminate was measured as follows. That is, three test pieces (20 × 150 mm) cut out from a hydrated oxygen-absorbing laminate were placed in a gas-impermeable cup (87 ml in content), and 95 wt% glycerin in order to adjust the humidity of the inside of the cup to 20% RH. 2 ml of the aqueous solution was put in, and heat-sealed with a heat-sealing lid made of a gas-impermeable aluminum foil laminated film. This was stored at 22 ° C. for 7 days, and the oxygen concentration in the container was analyzed using a gas chromatograph to calculate the amount of oxygen absorbed per unit area of the film. If the residual capacity (%) of the oxygen-absorbing laminate defined by the formula (3) is a value of 90% or more, the oxygen-absorbing laminate has practically allowable oxygen absorbing performance, and the residual capacity (%) Is 95% or more, it has practically excellent oxygen absorption performance. Table 1 and FIG. 4 show the evaluation results of the internal volume change rate and the remaining capacity due to the difference in the oxygen permeability and the water vapor permeability of the above-mentioned Examples and Comparative Examples.
【００４９】[0049]
【表１】 [Table 1]
【００５０】[0050]
【発明の効果】本発明の梱包材によれば、酸素透過度お
よび水蒸気透過度をそれぞれ所定範囲の値とすることに
より、含水させた酸素吸収性積層体の梱包時において、
酸素吸収性積層体の酸素吸収層から発生する水素を効果
的に放出することができ、また、上記酸素吸収性積層体
の酸素吸収層に含まれる水分の放散及び酸素による失活
を効果的に防止することができる。そのため梱包体の水
素による膨張を効果的に抑制できると共に、酸素吸収性
積層体における酸素吸収層の酸素吸収能力を低下させる
ことがなく、上記酸素吸収性積層体を、乾燥食品等の品
質低下を防止する包装容器に用いることができる。According to the packing material of the present invention, by setting the oxygen permeability and the water vapor permeability to values within a predetermined range, when packing a hydrated oxygen-absorbing laminate,
Hydrogen generated from the oxygen-absorbing layer of the oxygen-absorbing laminate can be effectively released, and the diffusion of water contained in the oxygen-absorbing layer of the oxygen-absorbing laminate and the deactivation by oxygen can be effectively prevented. Can be prevented. Therefore, the expansion of the package due to hydrogen can be effectively suppressed, and the oxygen-absorbing layer of the oxygen-absorbing layer in the oxygen-absorbing layer does not decrease the oxygen-absorbing ability. Can be used for packaging containers to prevent.
【図面の簡単な説明】[Brief description of the drawings]
【図１】梱包材により酸素吸収性積層体を梱包した状態
の参考図である。FIG. 1 is a reference view showing a state in which an oxygen-absorbing laminate is packed by a packing material.
【図２】酸素吸収性積層体の断面図である。FIG. 2 is a cross-sectional view of the oxygen-absorbing laminate.
【図３】酸素吸収性積層体の他の例の断面図である。FIG. 3 is a cross-sectional view of another example of the oxygen-absorbing laminate.
【図４】内容積変化率の時間変化を示す図である。FIG. 4 is a diagram showing a time change of the internal volume change rate.
【図５】酸素吸収性積層体を製造する際のスリット工程
および水塗布工程の参考図である。FIG. 5 is a reference diagram of a slitting step and a water application step when producing an oxygen-absorbing laminate.
【図６】一般的樹脂フィルムの酸素透過度と水素透過度
の関係を示す図である。FIG. 6 is a diagram showing a relationship between oxygen permeability and hydrogen permeability of a general resin film.
１ 酸素吸収性積層体 ２ 内層（隠蔽層） ３ 酸素吸収層 ４ａ 第１の接着剤層 ４ｂ 第２の接着剤層 ５ ガスバリヤー層 ６ 外層（保護層） ７ 平坦化層 １０ 酸素吸収性積層体 ３０ スリット装置および水添加装置 ３１ タンク ３２ イオン交換樹脂 ３３ 減菌フィルター ３４ 流量計 ３５，３８ 水塗布装置 ３６，３７ 塗布検査器 ３９ スリット ４０ 水道水 ４１ 巻き出しロール ４２ 巻き取りロール REFERENCE SIGNS LIST 1 oxygen-absorbing laminate 2 inner layer (concealing layer) 3 oxygen-absorbing layer 4 a first adhesive layer 4 b second adhesive layer 5 gas barrier layer 6 outer layer (protective layer) 7 flattening layer 10 oxygen-absorbing laminate Reference Signs List 30 slitting device and water adding device 31 tank 32 ion exchange resin 33 sterilization filter 34 flow meter 35, 38 water coating device 36, 37 coating inspection device 39 slit 40 tap water 41 unwinding roll 42 winding roll
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3E067 AA11 AB97 BA13A BA20A BB14A BB15A BB16A BB25A CA05 CA06 EA08 EB23 EE25 FA01 FB07 FC01 GB11 3E086 AA02 AB02 AD08 BA15 BB02 BB05 BB51 CA40 4F100 AK03A AK41B AK46B BA02 BA10A BA10B BA15 GB15 JA20 JD03 JD04 YY00 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 3E067 AA11 AB97 BA13A BA20A BB14A BB15A BB16A BB25A CA05 CA06 CA06 EA08 EB23 EE25 FA01 FB07 FC01 GB11 3E086 AA02 AB02 AD08 BA15 BB02 BB05 BB51 CA10 BA10 BA10 BA10 BA10 BA03 BA10 BA15 BA10 BA10 BA10 BA10 BA03 JD04 YY00
Claims (6)
梱包材において、 該梱包材の酸素透過度（２５℃，０％ＲＨ測定条件）を
１０〜２０，０００ｃｍ3／（ｍ2・ｄａｙ・ａｔｍ）と
すると共に、該梱包材の水蒸気透過度（４０℃，９０％
ＲＨ測定条件）を１００ｇ／（ｍ2・ｄａｙ）以下とす
ること、 を特徴とする梱包材。1. A packing material for packing an oxygen-absorbing laminate impregnated with water, wherein the oxygen permeability of the packing material (25 ° C., 0% RH measurement condition) is 10 to 20,000 cm 3 / (m 2 · day). Atm) and the water vapor transmission rate of the packing material (40 ° C., 90%
RH measurement condition) is 100 g / (m 2 · day) or less.
を特徴とする請求項１に記載の梱包材。2. The packaging material according to claim 1, wherein the packaging material is made of an olefin resin.
樹脂あるいはポリエステル系樹脂との積層体から成るこ
とを特徴とする請求項１記載の梱包材。3. The packing material according to claim 1, wherein the packing material is formed of a laminate of an olefin resin and a polyamide resin or a polyester resin.
ことを特徴とする請求項１乃至３のいずれかに記載の梱
包材。4. The packaging material according to claim 1, wherein the thickness of the packaging material is 30 to 250 μm.
度がそれぞれ異なる複数の梱包材から成ることを特徴と
する請求項１乃至４のいずれかに記載の梱包材。5. The packing material according to claim 1, wherein the packing material comprises a plurality of packing materials having different oxygen permeability and water vapor permeability.
される内容積変化率が６０〜１２０％となることを特徴
とする請求項１乃至５のいずれかに記載の梱包材。 Ｖ１＝Ｖ２／Ｖ３×１００ （１） Ｖ１：梱包体の内容積変化率（％） Ｖ２：２２℃、６０％ＲＨ条件で、３０日間保管後の梱
包体の内容積（ｃｍ3） Ｖ３：保管前の梱包体の内容積（ｃｍ3）6. The packing material according to claim 1, wherein the rate of change in internal volume represented by the following formula (1) is 60 to 120% when the package is formed. V1 = V2 / V3 × 100 (1) V1: Inner volume change rate (%) of the package V2: Inner volume (cm 3 ) of the package after storage at 22 ° C. and 60% RH for 30 days V3: Storage Inner volume of previous package (cm 3 )
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000193257A JP4595167B2 (en) | 2000-06-27 | 2000-06-27 | Package |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000193257A JP4595167B2 (en) | 2000-06-27 | 2000-06-27 | Package |
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| Publication Number | Publication Date |
|---|---|
| JP2002002824A true JP2002002824A (en) | 2002-01-09 |
| JP4595167B2 JP4595167B2 (en) | 2010-12-08 |
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ID=18692282
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000193257A Expired - Fee Related JP4595167B2 (en) | 2000-06-27 | 2000-06-27 | Package |
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| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002292812A (en) * | 2001-03-29 | 2002-10-09 | Mitsubishi Gas Chem Co Inc | Exterior package for oxygen scavenger |
| JP2011235915A (en) * | 2010-05-07 | 2011-11-24 | Dainippon Printing Co Ltd | Package of oxygen-absorbing film |
| JP2015047782A (en) * | 2013-09-02 | 2015-03-16 | セイコーエプソン株式会社 | Ink storage body, ink storage body set, and package of the same |
| KR101912865B1 (en) * | 2018-06-05 | 2018-12-28 | 주식회사 상화에프앤비 | Packaging methods for increasing quality and shelf-life of Korean fermented rice cake |
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| JPH10338275A (en) * | 1997-06-06 | 1998-12-22 | Material Eng Tech Lab Inc | Packaging member for medical container |
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| JPH0721083B2 (en) * | 1987-05-01 | 1995-03-08 | 丸善ポリマー株式会社 | Oxygen-absorbing resin composition containing hydrophilic filler |
| JPH04102555A (en) * | 1990-08-01 | 1992-04-03 | Unitika Res Lab:Kk | Fiber-made packaging bag |
| JPH0733171A (en) * | 1993-07-13 | 1995-02-03 | Nippon Soda Co Ltd | Packing bag for storing devices |
| JPH08258230A (en) * | 1995-03-27 | 1996-10-08 | Mitsubishi Chem Corp | Laminated resin film |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002292812A (en) * | 2001-03-29 | 2002-10-09 | Mitsubishi Gas Chem Co Inc | Exterior package for oxygen scavenger |
| JP2011235915A (en) * | 2010-05-07 | 2011-11-24 | Dainippon Printing Co Ltd | Package of oxygen-absorbing film |
| JP2015047782A (en) * | 2013-09-02 | 2015-03-16 | セイコーエプソン株式会社 | Ink storage body, ink storage body set, and package of the same |
| KR101912865B1 (en) * | 2018-06-05 | 2018-12-28 | 주식회사 상화에프앤비 | Packaging methods for increasing quality and shelf-life of Korean fermented rice cake |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4595167B2 (en) | 2010-12-08 |
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