JPH0585419B2 - - Google Patents
Info
- Publication number
- JPH0585419B2 JPH0585419B2 JP58024306A JP2430683A JPH0585419B2 JP H0585419 B2 JPH0585419 B2 JP H0585419B2 JP 58024306 A JP58024306 A JP 58024306A JP 2430683 A JP2430683 A JP 2430683A JP H0585419 B2 JPH0585419 B2 JP H0585419B2
- Authority
- JP
- Japan
- Prior art keywords
- air permeability
- oxygen
- oxygen absorber
- film
- holes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910052760 oxygen Inorganic materials 0.000 claims description 109
- 239000001301 oxygen Substances 0.000 claims description 109
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 105
- 239000006096 absorbing agent Substances 0.000 claims description 72
- -1 polyethylene Polymers 0.000 claims description 38
- 239000004698 Polyethylene Substances 0.000 claims description 35
- 229920000573 polyethylene Polymers 0.000 claims description 35
- 239000002985 plastic film Substances 0.000 claims description 22
- 229920006255 plastic film Polymers 0.000 claims description 22
- 239000004745 nonwoven fabric Substances 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 150000002926 oxygen Chemical class 0.000 claims description 4
- 230000035699 permeability Effects 0.000 description 72
- 239000000463 material Substances 0.000 description 58
- 239000005022 packaging material Substances 0.000 description 35
- 235000013305 food Nutrition 0.000 description 30
- 239000000123 paper Substances 0.000 description 29
- 238000010521 absorption reaction Methods 0.000 description 25
- 238000004806 packaging method and process Methods 0.000 description 19
- 239000010410 layer Substances 0.000 description 10
- 239000005020 polyethylene terephthalate Substances 0.000 description 9
- 229920000139 polyethylene terephthalate Polymers 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 229940123973 Oxygen scavenger Drugs 0.000 description 7
- 230000014759 maintenance of location Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000000565 sealant Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 229920000554 ionomer Polymers 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 5
- 239000005038 ethylene vinyl acetate Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 239000004952 Polyamide Substances 0.000 description 3
- 239000005062 Polybutadiene Substances 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 239000012775 heat-sealing material Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 229920002857 polybutadiene Polymers 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000005871 repellent Substances 0.000 description 3
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000002274 desiccant Substances 0.000 description 2
- 239000000796 flavoring agent Substances 0.000 description 2
- 235000019634 flavors Nutrition 0.000 description 2
- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000005033 polyvinylidene chloride Substances 0.000 description 2
- 235000013324 preserved food Nutrition 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 2
- 239000002964 rayon Substances 0.000 description 2
- 230000002940 repellent Effects 0.000 description 2
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000009461 vacuum packaging Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 241001553178 Arachis glabrata Species 0.000 description 1
- 241000512259 Ascophyllum nodosum Species 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 239000004255 Butylated hydroxyanisole Substances 0.000 description 1
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- 229920000298 Cellophane Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004908 Emulsion polymer Substances 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical class [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- LKDRXBCSQODPBY-AMVSKUEXSA-N L-(-)-Sorbose Chemical compound OCC1(O)OC[C@H](O)[C@@H](O)[C@@H]1O LKDRXBCSQODPBY-AMVSKUEXSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 235000019282 butylated hydroxyanisole Nutrition 0.000 description 1
- CZBZUDVBLSSABA-UHFFFAOYSA-N butylated hydroxyanisole Chemical compound COC1=CC=C(O)C(C(C)(C)C)=C1.COC1=CC=C(O)C=C1C(C)(C)C CZBZUDVBLSSABA-UHFFFAOYSA-N 0.000 description 1
- 229940043253 butylated hydroxyanisole Drugs 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 235000013611 frozen food Nutrition 0.000 description 1
- 229940074391 gallic acid Drugs 0.000 description 1
- 235000004515 gallic acid Nutrition 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 235000020232 peanut Nutrition 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229940079877 pyrogallol Drugs 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229960001755 resorcinol Drugs 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Containers And Plastic Fillers For Packaging (AREA)
- Bag Frames (AREA)
- Packages (AREA)
Description
〔産業上の利用分野〕
本発明は食品等の品質保持に利用される脱酸素
剤包装体に関し、さらに詳しくは、穴をあけたプ
ラスチツクのフイルム１と、紙または不織布の両
面にポリエチレンまたはポリエチレンより軟化点
が低いプラスチツクの穴をあけたフイルムを積層
接着するか熱シール剤を塗布してなるシート２と
を、貼りつけることなく重ね合わせてなるシート
３上下一対を、シート２を内側にして対向させこ
の間に脱酸素剤を配し周縁部をシールしてなるこ
とを特徴とする脱酸素剤包装体に関する。
〔従来の技術とその問題点〕
最近、脱酸素剤が食品その他の物品の保存のた
めに多く使用される様になつてきており、特に使
用される用途が食品分野である場合は、脱酸素剤
包装体の条件として従来の乾燥剤包装体等での一
定以上の通気度を保持すればバラツキがあつても
問題ない場合と異なり、通気度の調節精度が高い
ことが非常に重要な要件となつてきた。
即ち、対象の食品が高分水で酸素により品質劣
化し易い場合には、脱酸素剤包装体の通気度を大
きく、且つ精度高く調節することにより、酸素吸
収速度を一定範囲に収めることが必要であり、も
し通気度のバラツキが大きく酸素吸収速度が小さ
いものが混在した場合、酸素吸収前に食品の品質
劣化が進んでしまうことから本来の品質保持の目
的が達成できない。
また、対象が乾燥食品の場合には、品質劣化は
遅くそれほど大きな酸素吸収速度は必要ないもの
の、酸素吸収のため予め水分を含んだ脱酸素剤の
場合、通気度が大きすぎると脱酸素剤包装体から
水分が乾燥食品に移行し品質劣化する場合があ
る。特に、脱酸素剤包装体と乾燥食品との接触部
分が局部的に水分含有率が上昇し、品質劣化する
場合が多い。一方、脱酸素剤の酸素吸収能力上
も、脱酸素剤包装体の通気度が大きすぎる場合、
酸素吸収に必要な水分が蒸散し、酸素吸収能力の
低下により食品包装内に酸素が残存して乾燥食品
の酸化等による品質劣化が進んでしまうことがあ
る。
即ち、乾燥食品を対象とした場合、脱酸素剤包
装体の通気度は、小さく且つ精度良く調節するこ
とにより、水分移行速度を適正にすると同時に、
乾燥下での脱酸素剤の酸素吸収能力を充分に発揮
できる様にする必要がある。
以上の様に、脱酸素剤包装体の通気度は、その
酸素吸収速度、食品との水分の授受、酸素吸収能
力を決定する重要なものであり、対象食品の特性
に応じ低通気度から高通気度まで、精度良く調節
することが望まれて来た。
その他、多種多様な食品等の特性に応じ上記通
気性の他に耐水性、耐破損性、安全衛生性、食品
の香り保持性、外観保持性等が重要な要件となつ
てきた。特に、従来の乾燥剤包装体等と異なり、
脱酸素剤の場合、内容物が包装体を通し錆、染み
として発現し易く、外観を損ない安全衛生上も好
ましくない為、外観保持性は重要な要件と言え
た。
従来、一般的に脱酸素剤の包材は紙と穴のあい
たポリエチレンフイルムを熱ラミネートしたもの
が用いられており、この場合の通気性はポリエチ
レンフイルムの開孔率（孔径、孔数）で調節され
ていた。
しかし、通気性の調節において、包装材料製造
時の熱接着の際に、通気孔が変形して通気性が不
安定になり、酸素吸収速度がばらつく等の欠点が
あつた。特に、低通気度において通気度バラツキ
が大きく乾燥下での酸素吸収能力および水分移行
速度のバラツキが問題であつた。また、高通気度
に調節するためポリエチレンフイルムの開孔率を
上げると、錆、染みの発生が多くなるとの欠点が
あつた。更に、この脱酸素剤を水分含有量の多い
食品に適用した場合、包装材料が耐水性に劣るた
め、湿つて脱酸素剤の包装袋が破損したり、ある
いは有孔ポリエチレンフイルムの孔を通して内容
物が染みだす場合があり食品の安全衛生上好まし
くない等の欠点があつた。
上記欠点を改良する包装材料として、特開昭53
−51096号公報には融点が異なる２枚のプラスチ
ツクフイルムに孔をあけ、これをそのまま重ね合
わせるか、または紙を挟んで積層接着した包装材
料が開示されている。この場合には、フイルムを
開孔後熱接着するので、接着時に穴が変形した
り、または閉鎖してしまつたりして均一な所望の
範囲の通気度を有する包材を安定して得ることは
難しいとの欠点があつた。更に、接着時の各フイ
ルムや紙の圧着状態によつて、通気度が変化する
等の欠点がある。
また、特開昭56−124441号公報には同様に表面
に孔をあけたプラスチツクフイルムを用いた包装
材料が開示されている。しかしながら、これらの
場合にも、接着剤を使つたりするために、孔が変
形したり、接着剤の影響および積層する際の圧着
状態により通気性が変化する等の欠点があつた。
また、上記表面に孔をあけたプラスチツクフイ
ルムを用いた包装材料においては、表裏の有孔部
の間に紙層があり且つ表裏の有孔部の位置がずれ
ていることから、酸素が包材を通過する際紙層の
断面を横方向に通して表裏の孔から通気する為、
通気度を一定以上大きくすることが出来なかつ
た。もし、大きくする為、表裏の有孔部開孔率を
大きくすると錆、染みが発生するとの欠点があつ
た。
更に、従来の包装材料の場合、錆、染みの発生
を防止しつつ（安全衛生性を確保しつつ）、通気
度を大きくすることが出来なかつた為、酸素吸収
量の小さな小型サイズは単位酸素吸収量当たりの
包材面積が大きく（＝通気度が大きく）酸素吸収
速度が大きくなり、一方、大型サイズは単位酸素
吸収量当たりの包材面積が小さく（＝通気度が小
さく）、酸素吸収速度が小さくなつた。
即ち、脱酸素剤内容物量が２倍となつても脱酸
素剤包装体寸法（包材面積）は比例して大きくで
きず、単位酸素吸収量当たりの包材面積は小型サ
イズに比べ大型サイズは小さくなり、酸素吸収速
度もサイズ毎に変化せざるを得ないとの欠点があ
つた。
特に、大型サイズにおいては、通気度を一定以
上に調節することができず、酸素吸収速度を大き
く出来ないとの欠点があつた。
その他、従来の包装材料の場合、通気度のバラ
ツキが大きい為、必然的に包材通気度検査も頻度
高く必要で、且つ不良率も高いとの問題があつ
た。
また、従来の包装材料を用いた脱酸素剤、鮮度
保持剤を香りの保持が重要なチーズケーキ、とろ
ろ昆布、ピーナツツ等の食品へ適用した場合、香
りが変質したり、弱くなる等の問題が指摘されて
いた。
〔発明が解決しようとする課題〕
本発明の目的とするところは、上記した従来の
包装材料の有する問題点を解消し、低通気度から
高通気度まで精度の高い調節が可能で、安定した
通気度を有し、しかも、多湿食品へ適用した場合
でも安全衛生上の問題がなく、強度が大きく、食
品の香り保持性に優れる脱酸素剤包装体を提供す
ることにある。
更には、各酸素吸収量サイズ毎の酸素吸収速度
を同一とすることを可能とした脱酸素剤包装体を
提供することにある。
〔課題を解決するための手段〕
本発明者らは前記従来技術の問題点に鑑み鋭意
研究を行つた結果、本発明を完成するに至つた。
すなわち、本発明は、穴をあけたプラスチツク
のフイルム１と、紙または不織布の両面にポリエ
チレンまたはポリエチレンより軟化点が低いプラ
スチツクの穴をあけたフイルムを積層接着するか
熱シール剤を塗布してなるシート２とを、貼りつ
けることなく重ね合わせてなるシート３上下一対
を、シート２を内側にして対向させこの間に脱酸
素剤を配し周縁部をシールしてなることを特徴と
する脱酸素剤包装体を提供するものである。
本発明の脱酸素剤包装体は、穴をあけたプラス
チツクのフイルム１と紙または不織布の両面に、
穴をあけたポリエチレンフイルムまたはポリエチ
レンより軟化点が低いプラスチツクの穴をあけた
フイルムを積層接着するか、熱シール剤を塗布し
てなるシート２との重ね合わせからなるシート３
を、シート２を内側にして一対のシート３を対向
配置し、両者の間に脱酸素剤を収納するごとくシ
ートの周縁部（通常四方）をシールした構成とな
つている。
本発明において、穴をあけたプラスチツクのフ
イルム（以下、外材ということがある）として
は、例えば、ポリエチレンテレフタレート、ポリ
アミド、ポリプロピレン、ポリカーボネート、セ
ロフアンまたはポリビニルアルコール等からなる
フイルム、ポリ塩化ビニリデンコート各種フイル
ム、さらには、アルミ蒸着各種フイルム等の単層
フイルムまたは、これらのフイルムとポリエチレ
ン、エチレン酢酸ビニル共重合体、アイオノマー
樹脂、ポリブタジエンまたはポリ塩化ビニル等か
らなるプラスチツクフイルムを積層した複合フイ
ルムが挙げられ、適宜の大きさと数の穴をあけた
ものが用いられる。これらの中で、強度または製
造上の扱い易さ等を考慮するとポリエチレンテレ
フタレートフイルムまたはポリアミドフイルムの
単層または複合フイルムが好ましい。
本発明において、複合フイルムを使用する際に
は、ポリエチレン、エチレン酢酸ビニル共重合
体、アイオノマー樹脂、ポリブタジエンまたはポ
リ塩化ビニル等からなるプラスチツクフイルム層
側を内材と向かい合う様配置して使用される。
外材を構成するフイルムの厚さとしては、製造
上の扱い易さ等から100μ以下が好ましく、10〜
60μが特に好ましい。外材のフイルムの通気性は
酸素透過度1000ml／m2 24hr atm以下が好まし
く、500ml／m2 24hr atm以下が特に好ましい。
本発明における外材としては、湿潤時の強度、
印刷適性、香り保持性等からプラスチツクフイル
ムが好適に用いられる。
また、上記外材に穴をあける場合の穴の数や大
きさは、所望する通気度により適宜選択すること
が可能である。
本発明において、プラスチツクフイルムに穴を
あける際には、例えば円錐形、四角鍾、三角鍾、
先が尖つた円柱等の形をした針が使用される。ま
た、穴の大きさは針の太さ、長さ、穴を開ける際
の圧力等により調節することが可能で、針を加熱
することにより形状のそろつた穴をあける事も可
能である。
但し、加熱した針でフイルムを溶融させつつ開
孔すると、穴径が大きくなり錆、染み等の発生が
目立つことから、針を加熱せず開孔することが好
ましい。また、開孔する場合の方向としては、包
装体表面へ突起しない様包装体を作成した際の外
側から針開孔することが好ましい。
本発明において、内材シート２で用いられる紙
は、和紙、洋紙、またはレーヨン等との混抄紙が
使用される。この場合の紙の坪量は、20ｇ／m2〜
100ｇ／m2のものが使用され、包装適性等から好
ましくは30ｇ／m2〜60ｇ／m2のものが使用され
る。
また、内材シート２で用いられる不織布として
は、湿式、乾式またはスパンボンド式不織布等い
ずれの不織布をも使用することが可能であり、材
質もポリアミド、ポリエチレンテレフタレート、
レーヨン等種々のものを使用することが可能であ
る。
この場合の不織布の坪量は、20ｇ／m2〜100
ｇ／m2のものが使用され、包装適性等から好まし
くは30〜80ｇ／m2のものが使用される。
また、上記紙または不織布に撥水性または撥油
性を与える為、紙または不織布に撥水剤または撥
油剤による加工をしたものを用いることが可能で
ある。
本発明において、内材の紙または不織布の両面
に穴をあけたポリエチレンフイルムまたはポリエ
チレンより軟化点が低いプラスチツクの穴をあけ
たフイルムを積層接着するか、熱シール材を塗布
する際には、片面を熱シール材、他面を穴をあけ
たフイルムとすること、および両面とも熱シール
材、または穴をあけたフイルムとすることも適宜
シート強度等を勘案して選択することが可能であ
る。
本発明において、内材シート２に積層接着して
使用されるポリエチレンより軟化点の低いプラス
チツクのフイルムとしては、例えば、エチレン酢
酸ビニル共重合体、アイオノマー樹脂、ポリブタ
ジエンまたはポリ塩化ビニル等が用いられる。
内材シート２に積層接着して使用されるフイル
ムに穴を設ける方法としては、たとえば、フイル
ム材料に穴を開けてから紙または不織布に貼り付
ける方法、または、紙または不織布に貼り付けて
から穴を開ける方法等が採られる。フイルム材料
に通気性を付与する目的で設けられる孔は、一般
的には接着性を阻害しない限り多く開けた方が好
ましく、この場合の開孔率は一般的には0.2〜30
％であり、好ましくは１〜20％である。
本発明において、熱シール剤としては、たとえ
ば通常のホツトメルト剤、ホツトメルトエマルジ
ヨン、アイオノマーラテツクス、アイオノマー樹
脂エマルジヨン、ポリエチレンエマルジヨンまた
はエチレン酢酸ビニル共重合体エマルジヨン等が
使用される。シール層が熱シール剤の場合におい
て、その塗布量は一般的には0.5〜30ｇ／m2であ
り、好ましくは５〜20ｇ／m2である。
また、通気度を大きくする為、必要に応じパタ
ーンコートすることも可能である。
なお、本発明の包装材料を用いた包装体の強度
を上げるために、例えば割繊維を紙または不織布
と穴をあけたフイルム層との間、または、穴をあ
けたフイルム層の内側に密着して積層接着するこ
とも可能である。また、本発明の包装材料におい
て、印刷を穴をあけた外材フイルムの裏側に施す
ことができる。さらに、非通気性の外材の裏側に
文字印刷等の印刷を施した上にベタ印刷を施すこ
とが可能である。
本発明に係る脱酸素剤包装体を製造するには、
一般的に、四方向シール方法がとられる。具体的
には、たとえば縦型または横型の四方シール自動
充填包装機が用いられる。
四方向シール方法においては、プラスチツクの
フイルム１と紙または不織布の両面に、穴をあけ
たポリエチレンフイルムまたはポリエチレンより
軟化点が低いプラスチツクの穴をあけたフイルム
を積層接着するか、熱シール剤を塗布してなるシ
ート２とを重合わせたシート３一対を、四方シー
ル型自動充填包装機へ導き、シート２を互いに内
側にし対向させ、周縁部のみを熱シールしつつ前
記一対のシート２の間に適量の脱酸素剤が配され
るように脱酸素剤を充填して製造される。この
際、四方シール型自動充填包装機に設置された穿
孔装置によりプラスチツクのフイルム１に所望の
数と大きさの穴があけられ脱酸素剤包装体の通気
度が精度良く調節される。
本発明に係る脱酸素剤包装体を製造する際、外
材１の寸法を、内材シート２の寸法よりも１mm以
上、好ましくは２mm以上大きくすることにより、
充填包装時内材シート２が外材１からはみ出すこ
とがなく外観上好ましい。
更に、外材１が複合フイルムの場合、外材の寸
法を大きくすることにより、外材同士で一部分熱
シールすることが可能となり包装体強度を大きく
することが可能である。
本発明において、脱酸素剤包装体の通気度を乾
燥食品に適した低通気度から高水分食品に適した
高通気度まで幅広く、且つ精度高く調節するため
には、外材１の通気度に比べ内材シート２の通気
度は1.2倍以上あることが必要で、1.5倍以上ある
ことが好ましい。もし、外材１の通気度に比べ内
材シート２の通気度が1.2倍以下の場合、内材シ
ート２の通気度バラツキが本来律速とすべき精度
の高い外材１の通気度に影響し、脱酸素剤包装体
の通気度バラツキが大きくなつてしまう。
一般に、内材シート２の通気度は、通気度を透
湿度で表示した場合の20ｇ／m2・24Hr・atm（25
℃下）以上が必要で、好ましくは50ｇ／m2・
24Hr・atm（25℃下）以上、100ｇ／m2・24Hr・
atm（25℃下）以上が更に好ましい。
また、酸素吸収量サイズ毎の酸素吸収速度、性
能を同一にするためには、内容物の脱酸素剤の充
填量、特性にも影響されるものの、酸素吸収量サ
イズが２倍となれば開孔数を約２倍にすることに
より可能となる。
本発明において脱酸素剤としては、亜硫酸塩、
亜硫酸水素塩、亜ニチオン酸塩、ヒドロキノン、
カテコール、レゾルシン、ピロガロール、没食子
酸、ロンガリツト、アスコルビン酸および／また
はその塩、イソアルコルビン酸および／またはそ
の塩、ソルボース、グルコース、リグニン、ジブ
チルヒドロキシトルエン、ブチルヒドロキシアニ
ソール、第一鉄塩、または、鉄粉等の金属粉を含
有する脱酸素剤、炭酸ガス発生型脱酸素剤または
炭酸ガス吸収型脱酸素剤等が用いられる。
本発明において、具体的には例えばPET／PE
フイルムに小孔をあけたもの(1)と有孔ポリエチレ
ン／撥油紙／有孔ポリエチレン(2)とを貼りつける
ことなく重合わせたもの一対を用意し、２を内側
にして対向させ、脱酸素剤をいれて四方をシール
した脱酸素剤包装体等を例示することが出来る。
〔作用と効果〕
本発明の脱酸素剤包装体は、穴をあけたプラス
チツクのフイルムからなる外材１と紙または不織
布の両面に、穴をあけたポリエチレンフイルムま
たはポリエチレンより軟化点が低いプラスチツク
の穴をあけたフイルムを積層接着するか、熱シー
ル剤を塗布してなる内材シート２を、２を内側に
して配置し、四方の周縁部をシールした構成とな
つているため、通気は外材１の開孔部から外材１
と内材シート２の空間部、内材シート２を通して
内容物の脱酸素剤に到る。
この場合、内材シート２の通気度を外材１の通
気度に比べ1.2倍以上大きくしておくことにより、
内材シート２の通気度バラツキの影響を防止しつ
つ、熱接着、圧着等の工程を経ず精度高く調節開
孔された外材１の通気度を律速として脱酸素材包
装体の通気度を所望のレベルに精度高く調節する
ことが可能となる。
また、外材１と内材シート２の間に空間が有る
ため、外材１の精度の高い通気度をそのまま生か
すことが可能となり、従来困難であつた低通気度
（透湿度で10〜60ｇ／m2・24Hr・atレベル）での
精度の高い通気度調節が可能となつた。
更に、本発明の脱酸素材包装体では、印刷は外
材１のフイルムの裏側に施されるので、インキが
食品と直接触れることがないので衛生上安全であ
る。また、文字印刷を施した上にベタ印刷を施し
た場合は、たとえ内材シート２の上に内容物の染
み出しがあつても、ベタ印刷すなわち隠蔽印刷が
あるので包装体の外観を損ねることはない。ま
た、外材１と内材シート２との間に空間が有る
為、更に隠蔽効果が大きく、錆、染みが対象食品
へ移行しにくく衛生上安全である。
また、上記錆、染みの隠蔽効果が大きいことお
よび脱酸素剤包装体製造時穿孔装置の針の太さ、
数を変更することにより自由に且つ精度高く所望
の通気度を与えることが出来ることにより、従来
困難であつた脱酸素剤包装体の高通気度化が可能
となり、その結果、酸素吸収量の大きな大型サイ
ズへ高い通気度を付与することが可能となり、酸
素吸収量サイズ毎の酸素吸収速度、能力をバラツ
キなく同一とすることが出来た。
更に、本発明の脱酸素剤包装体の場合、特に表
面にプラスチツクフイルムを使用した場合には、
プラスチツクフイルムの耐水性および二重袋構成
となつている為、高水分食品等へ適用した際にも
耐水性に優れ、湿潤時の耐破損性に優れる。
また、本発明の脱酸素剤包装に使用する包材
は、従来の表面がプラスチツクフイルムからなる
包材に比べ各包材の加工工程は単純であり、包装
時に所望の通気度を付与することから、包材加工
上のミスも少なく安定的に製造することが出来
る。
更に、従来の包材は、広幅で製造され包材加工
時に所望の通気度に加工されていた。この際、巻
き取り時、包材保管時、取扱時の圧力、外力等に
よる通気度の変化が認められ、且つ包材構成上の
通気度バラツキが大きかつた為、所望の通気度が
付与されているかの充分な検査が必要とされ、そ
の不良率も高かつた。
一方、本願によれば、内材シート２の通気度は
シール性を阻害しない限り大きく設定することに
より、一定以上の通気度の付与を確認するのみで
良いことから通気度検査を大幅に簡略化すること
が可能とり、不良もなくすことが出来る。
更に、外材１への通気性付与は、充填包装時に
初めて開孔し所望の通気度を精度良く与えること
から、通気度検査を不要とすることが可能となつ
た。
また、充填包装時に自由に所望の通気度を各脱
酸素剤包装体毎に与えられることから、種々の通
気度の包材を準備、在庫する必要がなく脱酸素剤
の品種毎の包材在庫を大幅に減少させることが可
能である。
更に、本願の脱酸素剤包装体によれば、通気度
を低く、且つ精度高く調節することが可能な為、
食品の香りが脱酸素剤内部に到達しにくくするこ
とが可能で、香り保持性に優れるとの長所があ
る。特に、表面が香りを通しにくいプラスチツク
フイルムとした場合に香り保持効果が大きい。
また、従来の脱酸素剤包装体の場合、真空パツ
ク食品等へ適用した際、真空パツク時包装系内の
圧力が急激に低下するため脱酸素剤包装体内部の
空気が外気と同圧力となろうとして脱酸素剤包装
体が急激に膨張する。その際、脱酸素剤包装体の
シール部に大きな圧力がかかり、脱酸素剤包装体
が破損する場合があつた。特に、表面がプラスチ
ツクフイルムからなる紙との積層包材において
は、圧力が加わつた際の空気通過性に劣る為問題
があつた。また、紙／有孔PE構成包材において
は、通気度を大きくすると、錆、染みの発生が問
題となる為充分な加圧下での空気通過性を持たせ
ることができなかつた。
本願によれば、外材裏面への隠蔽印刷および外
材、内材シート間の空間による隠蔽効果の為、内
材シートの通気度を大きくしつつ、外材の通気は
外材１と内材シート２との間に空間が有る為、開
孔部直接に空気が通過することから、加圧下での
空気通過性が大きく、真空パツク時においても脱
酸素剤包装体と外気の圧力差はすぐに調節され、
シール部分へは圧力はかかりにくく安全性が高い
脱酸素剤が可能となる。
また、従来、酸素吸収速度の大きい脱酸素剤に
おいては、必然的に発熱を伴う為、冷凍食品、冷
蔵食品等へ適用した際、その発熱のため脱酸素剤
と接触した食品の一部が熱で品質劣化する場合が
あつた。
本願においては、外材１と内材シート２との間
に空間が有る為、発熱時の脱酸素剤の熱が食品に
伝わりにくく、発熱の影響防止にも優れる。
〔実施例〕
次に、実施例により本発明をさらに詳しく説明
する。
実施例 １
次の各素材を準備した。
(1) PET12μとポリエチレン30μをラミネートし
た巾60mmのロール巻きフイルム２本
(2) 撥水撥油加工した晒クラフト紙50ｇ／m2の片
面に穴径１mmにて、穴が均一に分散し、開孔率
20％のエチレン−酢酸ビニル共重合体フイルム
をラミネートし、他面にはエチレン−酢酸ビニ
ル共重合体のシール剤を５ｇ／m2塗布した巾60
mmのロール巻きシート２本
(3) 鉄系脱酸素剤
四方シール自動充填包装機の両側に、各々(1)、
(2)のロール巻きフイルム及びシートを配備し、(1)
を径0.7mmの針を付けた針ロールに通して穴をあ
けつつ、(2)と重ね合わせながら、両側から、包装
機の熱ロールに導入した。
重ね合わせた状態では、１はPETが外側にな
り、２はシール剤が(1)側になるよう両側フイルム
及びシートを導入し、(2)の内側に(3)を３ｇずつ充
填し、次いで、横シール部分の両サイドをカツト
すると共に、連絡したシール部の中央もカツトし
て、寸法50mm×50mmの小袋を得た。
(1)にあける穴の数を調節し、種々の数を穿孔し
た小袋を得、各々空気500ml共存の密封下、25℃
で脱酸素時間の測定を行つたところ、第１表の結
果を得た。
[Industrial Application Field] The present invention relates to an oxygen absorber package used for maintaining the quality of foods, etc. More specifically, the present invention relates to an oxygen absorber package used for maintaining the quality of foods, etc., and more specifically, a plastic film 1 with holes and a paper or nonwoven fabric made of polyethylene or polyethylene on both sides. Sheet 2, which is made by laminating and adhering films with holes made of plastic with a low softening point or applying heat sealant, and sheet 3, which is made by overlapping without pasting, a pair of upper and lower sheets, facing each other with sheet 2 on the inside. The present invention relates to an oxygen absorber package characterized in that an oxygen absorber is placed between the layers and the peripheral edge thereof is sealed. [Prior art and its problems] Recently, oxygen absorbers have been increasingly used for preserving food and other products, and especially when the application is in the food field, oxygen absorbers Unlike conventional desiccant packages, where there is no problem even if there is variation as long as the air permeability is maintained above a certain level, it is an extremely important requirement that the air permeability be adjusted with high accuracy. I'm getting old. In other words, if the target food has a high moisture content and is susceptible to quality deterioration due to oxygen, it is necessary to keep the oxygen absorption rate within a certain range by adjusting the air permeability of the oxygen absorber package to a large degree and with high precision. If foods with large variations in air permeability and low oxygen absorption rates are mixed, the quality of the food will deteriorate before oxygen is absorbed, making it impossible to achieve the original purpose of maintaining quality. In addition, when the target is dry food, quality deterioration is slow and there is no need for a high oxygen absorption rate, but if the oxygen absorber contains moisture in advance to absorb oxygen, if the air permeability is too high, the oxygen absorber packaging Water from the body may transfer to dried food, resulting in quality deterioration. In particular, the moisture content locally increases at the contact area between the oxygen absorber package and the dry food, often resulting in quality deterioration. On the other hand, if the air permeability of the oxygen absorber package is too high due to the oxygen absorption capacity of the oxygen absorber,
Moisture necessary for oxygen absorption evaporates, and the oxygen absorption capacity decreases, causing oxygen to remain in the food packaging, which may lead to deterioration of the quality of dried foods due to oxidation, etc. In other words, when targeting dry foods, the air permeability of the oxygen absorber package can be adjusted to a small and precise level, thereby optimizing the moisture transfer rate.
It is necessary to enable the oxygen scavenger to fully demonstrate its oxygen absorption ability under dry conditions. As mentioned above, the air permeability of the oxygen absorber package is important in determining its oxygen absorption rate, exchange of moisture with food, and oxygen absorption capacity, and varies from low to high air permeability depending on the characteristics of the target food. It has been desired to precisely adjust the airflow rate. In addition to the above-mentioned air permeability, water resistance, breakage resistance, safety and hygiene, food flavor retention, appearance retention, and the like have become important requirements in response to the characteristics of a wide variety of foods. In particular, unlike conventional desiccant packages, etc.
In the case of oxygen scavengers, the contents tend to pass through the package and cause rust and stains, which impairs the appearance and is not desirable from a health and safety standpoint, so appearance retention was an important requirement. Conventionally, the packaging material for oxygen absorbers has generally been a thermal laminate of paper and perforated polyethylene film, and the breathability in this case is controlled by the porosity (pore diameter, number of holes) of the polyethylene film. It had been. However, in adjusting air permeability, there were drawbacks such as deformation of air holes during thermal bonding during manufacturing of packaging materials, making air permeability unstable and causing variations in oxygen absorption rate. In particular, there was a problem of large variations in air permeability at low air permeability, and variations in oxygen absorption capacity and moisture transfer rate under dry conditions. Furthermore, increasing the porosity of the polyethylene film in order to adjust it to high air permeability has the disadvantage of increasing the occurrence of rust and stains. Furthermore, when this oxygen absorber is applied to foods with a high moisture content, the packaging material has poor water resistance, so the packaging bag for the oxygen absorber may become damp and break, or the contents may pass through the holes in the perforated polyethylene film. There were drawbacks such as the fact that water may seep out, which is unfavorable in terms of food safety and hygiene. As a packaging material that improves the above drawbacks, JP-A-53
Japanese Patent Application No. 51096 discloses a packaging material in which two plastic films having different melting points are made with holes and are either stacked on top of each other or laminated and bonded with paper sandwiched between them. In this case, since the film is thermally bonded after opening, the holes may be deformed or closed during bonding, making it difficult to stably obtain a packaging material with uniform air permeability within the desired range. The drawback was that it was difficult. Furthermore, there is a drawback that the air permeability changes depending on the pressure bonding state of each film or paper during adhesion. Further, Japanese Patent Application Laid-Open No. 56-124441 discloses a packaging material using a plastic film having holes in its surface. However, even in these cases, there were drawbacks such as the holes being deformed due to the use of an adhesive, and the air permeability changing depending on the influence of the adhesive and the pressure bonding condition during lamination. In addition, in packaging materials using plastic film with holes on the surface, there is a paper layer between the perforated parts on the front and back, and the positions of the perforated parts on the front and back are shifted, so oxygen is absorbed into the packaging material. When passing through the paper layer, it passes through the cross section of the paper layer in the horizontal direction and vents through the holes on the front and back.
It was not possible to increase the air permeability beyond a certain level. If the porosity of the front and back pores were increased in order to increase the size, there was a drawback that rust and stains would occur. Furthermore, in the case of conventional packaging materials, it was not possible to increase air permeability while preventing rust and staining (while ensuring safety and hygiene). The packaging material area per unit amount of oxygen absorption is large (= high air permeability), which increases the oxygen absorption rate, while the large size has a small packaging material area per unit oxygen absorption amount (= low air permeability), resulting in a high oxygen absorption rate. became smaller. In other words, even if the content of the oxygen absorber doubles, the size of the oxygen absorber package (packaging material area) cannot be increased proportionally, and the packaging material area per unit amount of oxygen absorbed is smaller in the large size than in the small size. The drawback was that the oxygen absorption rate had to change depending on the size. Particularly, in large sizes, the air permeability cannot be adjusted above a certain level and the oxygen absorption rate cannot be increased. In addition, in the case of conventional packaging materials, since the air permeability varies widely, packaging material air permeability inspections are inevitably required frequently, and the defect rate is also high. In addition, when applying oxygen absorbers and freshness-preserving agents using conventional packaging materials to foods such as cheesecake, yam kelp, peanuts, etc., where it is important to preserve the aroma, problems such as the aroma deteriorating or becoming weaker occur. It had been pointed out. [Problems to be Solved by the Invention] The purpose of the present invention is to solve the above-mentioned problems of conventional packaging materials, and to create a stable packaging material that can be precisely adjusted from low air permeability to high air permeability. An object of the present invention is to provide an oxygen absorber package which has air permeability, causes no safety and hygiene problems even when applied to humid foods, has high strength, and has excellent food flavor retention properties. A further object of the present invention is to provide an oxygen absorber package that makes it possible to make the oxygen absorption rate the same for each oxygen absorption size. [Means for Solving the Problems] The present inventors conducted intensive research in view of the problems of the prior art described above, and as a result, completed the present invention. That is, the present invention is made by laminating and bonding a perforated plastic film 1 and a perforated film made of polyethylene or a plastic having a softening point lower than that of polyethylene on both sides of paper or nonwoven fabric, or applying a heat sealant. An oxygen absorber characterized in that a pair of upper and lower sheets 3 are formed by stacking a sheet 2 and a sheet 2 on top of each other without pasting them, facing each other with the sheet 2 inside, placing an oxygen absorber between them and sealing the peripheral edge. A package is provided. The oxygen absorber package of the present invention has a plastic film 1 with holes and paper or nonwoven fabric on both sides.
A sheet 3 consisting of a sheet 2 made of a perforated polyethylene film or a perforated film of plastic with a lower softening point than polyethylene, laminated and bonded or coated with a heat sealing agent.
A pair of sheets 3 are arranged facing each other with the sheet 2 facing inside, and the peripheral edges (usually on all four sides) of the sheets are sealed so that an oxygen scavenger is stored between them. In the present invention, the plastic film with holes (hereinafter sometimes referred to as outer material) includes, for example, films made of polyethylene terephthalate, polyamide, polypropylene, polycarbonate, cellophane or polyvinyl alcohol, various films coated with polyvinylidene chloride, Furthermore, examples include single-layer films such as various aluminum-deposited films, and composite films in which these films are laminated with plastic films made of polyethylene, ethylene-vinyl acetate copolymers, ionomer resins, polybutadiene, polyvinyl chloride, etc. A hole with the same size and number of holes is used. Among these, a single layer or composite film of polyethylene terephthalate film or polyamide film is preferred in consideration of strength, ease of manufacturing, etc. In the present invention, when a composite film is used, the plastic film layer made of polyethylene, ethylene vinyl acetate copolymer, ionomer resin, polybutadiene, polyvinyl chloride, etc. is arranged so as to face the inner material. The thickness of the film constituting the outer material is preferably 100μ or less for ease of handling during manufacturing, and 10~
60μ is particularly preferred. The air permeability of the outer film is preferably 1000 ml/m 2 24 hr atm or less in oxygen permeability, particularly preferably 500 ml/m 2 24 hr atm or less. The outer material in the present invention includes wet strength,
Plastic film is preferably used because of its printability, scent retention, etc. Furthermore, the number and size of holes when making holes in the outer material can be appropriately selected depending on the desired air permeability. In the present invention, when making a hole in a plastic film, for example, a conical hole, a square hole, a triangular hole,
A needle shaped like a cylinder with a pointed tip is used. Further, the size of the hole can be adjusted by adjusting the thickness and length of the needle, the pressure when making the hole, etc., and it is also possible to make holes with a uniform shape by heating the needle. However, if holes are opened while the film is melted with a heated needle, the diameter of the holes will increase and rust, stains, etc. will become noticeable, so it is preferable to open the holes without heating the needle. In addition, as for the direction in which the holes are to be opened, it is preferable that the holes be opened from the outside when the package is created so as not to protrude toward the surface of the package. In the present invention, the paper used for the inner sheet 2 is Japanese paper, Western paper, or paper mixed with rayon or the like. The basis weight of the paper in this case is 20g/m 2 ~
100 g/m 2 is used, and preferably 30 g/m 2 to 60 g/m 2 from the viewpoint of packaging suitability. Further, as the nonwoven fabric used for the inner material sheet 2, any nonwoven fabric such as wet type, dry type or spunbond type nonwoven fabric can be used, and the material can also be polyamide, polyethylene terephthalate,
Various materials such as rayon can be used. In this case, the basis weight of the nonwoven fabric is 20g/m 2 to 100
g/m 2 is used, preferably 30 to 80 g/m 2 from the viewpoint of packaging suitability. Furthermore, in order to impart water repellency or oil repellency to the paper or nonwoven fabric, it is possible to use paper or nonwoven fabric treated with a water repellent or oil repellent. In the present invention, when a polyethylene film with holes punched on both sides of the paper or nonwoven fabric used as the inner material or a punched film of plastic with a lower softening point than polyethylene is laminated and bonded, or when a heat sealing material is applied, one side is It is also possible to use a heat sealing material on one side and a film with holes on the other side, or to use a heat sealing material on both sides or a film with holes on both sides, taking sheet strength etc. into consideration as appropriate. In the present invention, as the plastic film having a softening point lower than that of polyethylene, which is laminated and bonded to the inner sheet 2, for example, ethylene vinyl acetate copolymer, ionomer resin, polybutadiene, polyvinyl chloride, or the like is used. The method of making holes in the film used by laminating and adhering to the inner material sheet 2 includes, for example, making holes in the film material and then attaching it to paper or nonwoven fabric, or attaching it to paper or nonwoven fabric and then making holes. A method of opening the door is adopted. It is generally preferable to have as many holes as possible for the purpose of imparting air permeability to the film material as long as it does not impede adhesion, and in this case the pore size is generally 0.2 to 30
%, preferably 1 to 20%. In the present invention, the heat sealing agent used is, for example, a conventional hot melt agent, hot melt emulsion, ionomer latex, ionomer resin emulsion, polyethylene emulsion or ethylene vinyl acetate copolymer emulsion. When the sealing layer is a heat sealing agent, the coating amount is generally 0.5 to 30 g/m 2 , preferably 5 to 20 g/m 2 . Furthermore, in order to increase the air permeability, it is also possible to apply pattern coating if necessary. In order to increase the strength of a package using the packaging material of the present invention, for example, split fibers may be tightly attached between paper or nonwoven fabric and a perforated film layer, or on the inside of a perforated film layer. It is also possible to laminate and bond. Furthermore, in the packaging material of the present invention, printing can be applied to the back side of the outer film having holes. Furthermore, it is possible to perform printing such as character printing on the back side of the non-breathable outer material and then perform solid printing. To manufacture the oxygen absorber package according to the present invention,
Generally, a four-way seal method is used. Specifically, for example, a vertical or horizontal four-side seal automatic filling and packaging machine is used. In the four-way sealing method, a perforated polyethylene film or a perforated film of plastic with a softening point lower than polyethylene is laminated and bonded on both sides of the plastic film 1 and paper or nonwoven fabric, or a heat sealing agent is applied. A pair of sheets 3, in which the sheets 2 and 2 formed of It is manufactured by filling with oxygen absorber so that the appropriate amount of oxygen absorber is distributed. At this time, a desired number and size of holes are punched in the plastic film 1 by a punching device installed in a four-sided seal type automatic filling and packaging machine, thereby precisely adjusting the air permeability of the oxygen absorber package. When manufacturing the oxygen absorber package according to the present invention, by making the dimensions of the outer material 1 larger than the dimensions of the inner material sheet 2 by 1 mm or more, preferably by 2 mm or more,
The inner material sheet 2 does not protrude from the outer material 1 during filling and packaging, which is preferable in terms of appearance. Furthermore, when the outer material 1 is a composite film, by increasing the dimensions of the outer material, it becomes possible to partially heat seal the outer materials to each other, thereby increasing the strength of the package. In the present invention, in order to adjust the air permeability of the oxygen absorber package over a wide range from low air permeability suitable for dry foods to high air permeability suitable for high moisture foods, it is necessary to compare the air permeability of the outer material 1 with high accuracy. The air permeability of the inner sheet 2 must be 1.2 times or more, preferably 1.5 times or more. If the air permeability of the inner material sheet 2 is less than 1.2 times that of the outer material 1, the variation in the air permeability of the inner material sheet 2 will affect the air permeability of the outer material 1, which should be rate-determining with high accuracy, and This increases the variation in air permeability of the oxygen agent package. In general, the air permeability of the inner sheet 2 is 20g/ m2・24Hr・atm (25
℃) or more is required, preferably 50g/ m2・
24Hr・atm (below 25℃) or more, 100g/ m2・24Hr・
ATM (below 25°C) or higher is more preferable. In addition, in order to make the oxygen absorption rate and performance the same for each oxygen absorption capacity size, although it is affected by the filling amount and characteristics of the oxygen scavenger in the contents, if the oxygen absorption capacity size is doubled, the This becomes possible by approximately doubling the number of holes. In the present invention, the oxygen scavenger includes sulfite,
Bisulfite, dithionite, hydroquinone,
Catechol, resorcinol, pyrogallol, gallic acid, rongarit, ascorbic acid and/or its salts, isoalkorbic acid and/or its salts, sorbose, glucose, lignin, dibutylated hydroxytoluene, butylated hydroxyanisole, ferrous salts, or An oxygen absorber containing metal powder such as iron powder, a carbon dioxide gas generating type oxygen absorber, a carbon dioxide gas absorbing type oxygen absorber, etc. are used. In the present invention, specifically, for example, PET/PE
Prepare a pair of film with small holes (1) and perforated polyethylene/oil-repellent paper/perforated polyethylene (2) overlapped without pasting, and place them facing each other with 2 on the inside to remove oxygen. An example of the oxygen absorber package is a package containing an oxygen absorber and sealed on all sides. [Operations and Effects] The oxygen absorber package of the present invention has holes made of a polyethylene film or plastic having a softening point lower than polyethylene on both sides of the outer material 1 made of a perforated plastic film and paper or nonwoven fabric. The inner material sheet 2, which is made by laminating and bonding open films or applying a heat sealant, is placed with 2 on the inside, and the peripheral edges on all sides are sealed, so that ventilation is achieved through the outer material 1. Outer material 1 from the opening of
and the space between the inner material sheet 2 and the oxygen absorber of the contents through the inner material sheet 2. In this case, by making the air permeability of the inner material sheet 2 at least 1.2 times greater than that of the outer material 1,
While preventing the influence of variations in the air permeability of the inner material sheet 2, the desired air permeability of the deoxidizing material package is determined by controlling the air permeability of the outer material 1, which has holes that are precisely adjusted without going through processes such as thermal bonding and pressure bonding. It becomes possible to adjust the level with high precision. In addition, since there is a space between the outer material 1 and the inner material sheet 2, it is possible to take advantage of the highly accurate air permeability of the outer material 1, which was previously difficult to achieve. It is now possible to precisely adjust the air permeability at 2.24Hr.at level). Furthermore, in the deoxidizing material package of the present invention, since printing is performed on the back side of the film of the outer material 1, the ink does not come into direct contact with the food, so it is sanitary and safe. In addition, if solid printing is applied on top of character printing, even if the contents ooze out onto the inner sheet 2, there will be solid printing, that is, concealment printing, which will damage the appearance of the package. There isn't. Furthermore, since there is a space between the outer material 1 and the inner material sheet 2, the concealing effect is even greater, and rust and stains are less likely to transfer to the target food, making it sanitary and safe. In addition, the above-mentioned rust and stain hiding effect is large, and the thickness of the needle of the punching device when manufacturing the oxygen absorber package,
By changing the number of oxygen absorbers, it is possible to freely and precisely give the desired air permeability, making it possible to increase the air permeability of the oxygen absorber package, which was previously difficult. It became possible to provide high air permeability to large sizes, and it was possible to make the oxygen absorption rate and capacity the same for each oxygen absorption size without variation. Furthermore, in the case of the oxygen absorber package of the present invention, especially when a plastic film is used on the surface,
Due to the water resistance of plastic film and double bag structure, it has excellent water resistance even when applied to high moisture foods, and has excellent breakage resistance when wet. In addition, the packaging materials used for the oxygen absorber packaging of the present invention have simpler processing steps than conventional packaging materials whose surface is made of plastic film, and the desired air permeability can be imparted during packaging. , there are fewer errors in processing the packaging material, and it can be manufactured stably. Further, conventional packaging materials are manufactured in wide widths and processed to have a desired air permeability during packaging material processing. At this time, changes in air permeability were observed due to pressure, external force, etc. during winding, storage, and handling of the packaging material, and there were large variations in air permeability due to the structure of the packaging material, so the desired air permeability could not be imparted. This required thorough inspection to ensure that the product was in good condition, and the defective rate was high. On the other hand, according to the present application, by setting the air permeability of the inner sheet 2 as high as long as it does not impede the sealing performance, it is only necessary to confirm that the air permeability is above a certain level, which greatly simplifies the air permeability inspection. This makes it possible to eliminate defects. Furthermore, since the air permeability is imparted to the outer material 1 by opening the holes for the first time during filling and packaging to provide the desired air permeability with high precision, it has become possible to eliminate the need for air permeability testing. In addition, since the desired air permeability can be freely given to each oxygen absorber package at the time of filling and packaging, there is no need to prepare and stock packaging materials with various air permeability, and packaging materials can be stocked for each type of oxygen absorber. can be significantly reduced. Furthermore, according to the oxygen absorber package of the present application, it is possible to adjust the air permeability low and with high precision.
It has the advantage of being able to make it difficult for the food scent to reach the inside of the oxygen absorber, and has excellent scent retention. In particular, when the surface is made of a plastic film that does not allow fragrance to pass through, the scent retention effect is great. In addition, in the case of conventional oxygen absorber packaging, when applied to vacuum-packed foods, etc., the pressure inside the packaging system decreases rapidly during vacuum packing, so the air inside the oxygen absorber packaging has the same pressure as the outside air. As a result, the oxygen absorber package expands rapidly. At that time, a large pressure was applied to the seal portion of the oxygen absorber package, and the oxygen absorber package was sometimes damaged. In particular, laminated packaging materials with paper whose surface is made of plastic film have been problematic because they have poor air permeability when pressure is applied. In addition, in paper/perforated PE packaging materials, if the air permeability is increased, the generation of rust and stains becomes a problem, so it has not been possible to provide air permeability under sufficient pressure. According to the present application, due to the concealment printing on the back surface of the outer material and the concealing effect due to the space between the outer material and the inner material sheet, the air permeability of the inner material sheet is increased, and the ventilation of the outer material is controlled between the outer material 1 and the inner material sheet 2. Since there is a space in between, air passes directly through the openings, so air permeability under pressure is high, and even when vacuum packing, the pressure difference between the oxygen absorber package and the outside air is quickly adjusted.
It is possible to use a highly safe oxygen scavenger as pressure is not easily applied to the sealed part. In addition, conventional oxygen absorbers that have a high oxygen absorption rate inevitably generate heat, so when applied to frozen foods, refrigerated foods, etc., the heat generated causes some of the food that comes into contact with the oxygen absorber to heat up. There were cases where the quality deteriorated. In the present application, since there is a space between the outer material 1 and the inner material sheet 2, the heat of the oxygen absorber during heat generation is difficult to be transmitted to the food, and it is also excellent in preventing the effects of heat generation. [Example] Next, the present invention will be explained in more detail with reference to Examples. Example 1 The following materials were prepared. (1) Two rolled films with a width of 60 mm made by laminating PET 12 μ and polyethylene 30 μ Open area ratio
Width 60mm laminated with 20% ethylene-vinyl acetate copolymer film and coated with 5g/ m2 of ethylene-vinyl acetate copolymer sealant on the other side.
2 mm roll sheets (3) Iron-based oxygen absorber Place each (1) on both sides of the four-side seal automatic filling and packaging machine.
Deploy the rolled film and sheet of (2), and (1)
The material was passed through a needle roll equipped with a needle with a diameter of 0.7 mm to make a hole, and while being overlapped with (2), it was introduced from both sides into the hot roll of the packaging machine. In the stacked state, the PET is on the outside for 1, and the sealant is on the (1) side for 2. Introduce the films and sheets on both sides, fill the inside of (2) with 3g of (3), and then Both sides of the horizontal seal portion were cut, and the center of the connected seal portion was also cut to obtain a pouch with dimensions of 50 mm x 50 mm. Adjust the number of holes drilled in (1) to obtain small bags with various numbers of holes, and store each bag at 25°C in a hermetically sealed environment with 500 ml of air.
When the deoxidation time was measured, the results shown in Table 1 were obtained.
【表】
実施例 ２
裏に文字印刷と白べた印刷各１色を施した厚さ
12μのPET（ポリエチレンテレフタレート）フイ
ルムに、40μの厚さにPE（ポリエチレン、シール
層）を押し出しラミネートした幅が50mmの積層フ
イルム(1)と、
坪量が60ｇ／m2の和紙と、均一に分布する径１
mmの孔を有し、開孔率が15％の有孔ポリエチレン
フイルム（通気性を有するシール層）を片面にラ
ミネートし、他面にアイオノマーラテツクスを10
ｇ／m2塗布した幅が45mmの積層シート(2)を用意し
た。
次に、(1)を径0.5mmの針をつけた針ロールに通
して、(1)に穴をあけつつ、積層シート２と積層フ
イルム１とを(1)のPEと(2)の和紙が向い合う様に
重ねた。
この包装材料を一対用意し、両者を積層シート
２の有孔ポリエチレンフイルム面が互いに対向す
るようにして四方シール自動充填包装機へ導き、
有孔ポリエチレンフイルムの内側に鉄系脱酸素剤
を1.5ｇずつ充填しつつPETの外側よりバーヒー
ターにてシールし、切断して寸法が50×50mmの脱
酸素剤包装体を得た。
なお、前記(1)に穴をあける際、種々の孔数のも
のを作成し、(1)の開孔率を変化させた脱酸素剤包
装体包装体とした。
この脱酸素剤包装体を脱脂綿２ｇに水10mlを含
ませた含水綿、および空気250mlとともにKOP
（ポリ塩化ビニリデンコート延伸ポリプロピレ
ン）／PEからなるラミネートフイルム袋に密封
し、25℃の恒温槽中に保存した。
KOP袋の酸素濃度を経時毎に測定し、酸素濃
度が0.1％以下になるまでの時間（脱酸素時間）
を記録した。また、２日目にKOP袋にピンホー
ルを開けて保存し、保存開始後14日目の脱酸素剤
包装体の状態を観察した。結果を第２表に示す。
比較例 １
純白紙（坪量60ｇ／m2）と、均一に分布する径
0.5mmの孔を有する有孔ポリエチレン（PE）フイ
ルムとを熱ラミネートした包装材料を用いて四方
シールして、鉄系脱酸素剤1.5ｇを充填して50×
50mmの脱酸素剤包装体を得た。
なお、前記有孔ポリエチレンフイルムは種々の
孔数のものを作成し、その開孔率を変化させた脱
酸素剤包装体包装体とした。[Front] Example 2 Thickness with one color each of text printing and white solid printing on the back side
A laminated film (1) with a width of 50 mm made by extruding and laminating PE (polyethylene, sealing layer) to a thickness of 40 μ on a PET (polyethylene terephthalate) film of 12 μ, and Japanese paper with a basis weight of 60 g/m 2 are uniformly laminated. Distribution diameter 1
A perforated polyethylene film (breathable sealing layer) with pores of 10 mm and a porosity of 15% is laminated on one side, and 10 mm of ionomer latex is laminated on the other side.
A laminated sheet (2) having a width of 45 mm and coated with g/m 2 was prepared. Next, (1) is passed through a needle roll equipped with a needle with a diameter of 0.5 mm, and while making a hole in (1), the laminated sheet 2 and laminated film 1 are separated from (1) PE and (2) Japanese paper. stacked so that they were facing each other. A pair of these packaging materials is prepared, and both are introduced into a four-sided seal automatic filling and packaging machine with the perforated polyethylene film surfaces of the laminated sheet 2 facing each other.
The inside of the perforated polyethylene film was filled with 1.5 g of iron-based oxygen absorber, sealed from the outside of the PET with a bar heater, and cut to obtain an oxygen absorber package with dimensions of 50 x 50 mm. In addition, when making holes in the above (1), various numbers of holes were prepared to obtain oxygen absorber packages with varying pore ratios as in (1). KOP this oxygen absorber package with 2g of absorbent cotton soaked in 10ml of water and 250ml of air.
It was sealed in a laminated film bag made of (polyvinylidene chloride coated stretched polypropylene)/PE and stored in a constant temperature bath at 25°C. The oxygen concentration in the KOP bag is measured over time, and the time it takes for the oxygen concentration to drop to 0.1% or less (oxygen removal time)
was recorded. In addition, on the second day, the KOP bag was stored with a pinhole made, and the condition of the oxygen absorber package was observed on the 14th day after the start of storage. The results are shown in Table 2. Comparative example 1 Pure white paper (basis weight 60g/m 2 ) and uniformly distributed diameter
A perforated polyethylene (PE) film with 0.5 mm pores was sealed on all sides using a heat-laminated packaging material, filled with 1.5 g of iron-based oxygen absorber, and placed in a 50
A 50 mm oxygen absorber package was obtained. The perforated polyethylene films were prepared with various numbers of holes, and oxygen absorber packages with varying porosity were made.
【表】
この脱酸素剤包装体を用いて実施例２と同様の
試験を行つた結果を、比較例１として第２表に実
施例２と併せて示す。[Table] The results of a test similar to that of Example 2 using this oxygen absorber package are shown as Comparative Example 1 in Table 2 together with Example 2.
図面において、第１図は自動充填包装機の態様
例を示す。また、第２図は本発明の脱酸素剤包装
体の包材構成の一態様の概念図を示し、第３図は
本発明の脱酸素剤包装体の一態様の断面斜視図を
示す。
図面において、１は未穿孔の外材、２は内材、
３は針ロール、４は熱ロール、５は脱酸素剤充填
シユート、６はカツター、７は脱酸素剤包装体、
１１は外材(1)、１２は穴を開けたフイルムまたは
熱シール材、１３は紙または不織布、１４は穴を
開けたフイルムまたは熱シール剤、１５はシート
(2)、１６はシート(3)、１８は脱酸素剤をそれぞれ
表す。
In the drawings, FIG. 1 shows an example of an automatic filling and packaging machine. Further, FIG. 2 shows a conceptual diagram of one embodiment of the packaging material configuration of the oxygen absorber package of the present invention, and FIG. 3 shows a cross-sectional perspective view of one embodiment of the oxygen absorber package of the present invention. In the drawing, 1 is an unperforated outer material, 2 is an inner material,
3 is a needle roll, 4 is a heat roll, 5 is an oxygen absorber filling chute, 6 is a cutter, 7 is an oxygen absorber package,
11 is an outer material (1), 12 is a film or heat sealant with holes, 13 is paper or nonwoven fabric, 14 is a film or heat sealant with holes, 15 is a sheet
(2), 16 represents the sheet (3), and 18 represents the oxygen scavenger, respectively.
Claims (1)
または不織布の両面にポリエチレンまたはポリエ
チレンより軟化点が低いプラスチツクの穴をあけ
たフイルムを積層接着するか熱シール剤を塗布し
てなるシート２とを、貼りつけることなく重ね合
わせてなるシート３上下一対を、シート２を内側
にして対向させこの間に脱酸素剤を配し周縁部を
シールしてなることを特徴とする脱酸素剤包装
体。1. A plastic film 1 with holes and a sheet 2 made by laminating and adhering polyethylene or a plastic film with a lower softening point than polyethylene on both sides of paper or nonwoven fabric, or applying a heat sealing agent, This oxygen absorber package is characterized in that a pair of upper and lower sheets 3 are stacked without pasting and are faced to each other with the sheet 2 inside, an oxygen absorber is placed between them, and the peripheral edges are sealed.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58024306A JPS59152171A (en) | 1983-02-16 | 1983-02-16 | Deoxidizer package |
| KR1019840000140A KR890005278B1 (en) | 1983-01-28 | 1984-01-14 | Oxygen absorbent packet |
| CA000445971A CA1212525A (en) | 1983-01-28 | 1984-01-25 | Oxygen absorbent packet |
| US06/574,627 US4579223A (en) | 1983-01-28 | 1984-01-27 | Oxygen absorbent packet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58024306A JPS59152171A (en) | 1983-02-16 | 1983-02-16 | Deoxidizer package |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59152171A JPS59152171A (en) | 1984-08-30 |
| JPH0585419B2 true JPH0585419B2 (en) | 1993-12-07 |
Family
ID=12134485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58024306A Granted JPS59152171A (en) | 1983-01-28 | 1983-02-16 | Deoxidizer package |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59152171A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08173738A (en) * | 1994-12-28 | 1996-07-09 | Nec Kyushu Ltd | Method and apparatus for collecting dust |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0329751A (en) * | 1989-06-16 | 1991-02-07 | Nippon Soda Co Ltd | Packing material for deoxidizer |
| JPH0460874U (en) * | 1990-09-27 | 1992-05-25 | ||
| JP6030036B2 (en) * | 2013-10-04 | 2016-11-24 | 株式会社フジキカイ | Horizontal bag making and filling machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5031115U (en) * | 1973-07-13 | 1975-04-07 | ||
| JPS5118821U (en) * | 1974-07-29 | 1976-02-12 |
-
1983
- 1983-02-16 JP JP58024306A patent/JPS59152171A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08173738A (en) * | 1994-12-28 | 1996-07-09 | Nec Kyushu Ltd | Method and apparatus for collecting dust |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59152171A (en) | 1984-08-30 |
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