JP4010626B2 - Packaging bag for desiccant - Google Patents

Packaging bag for desiccant Download PDF

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Publication number
JP4010626B2
JP4010626B2 JP03724398A JP3724398A JP4010626B2 JP 4010626 B2 JP4010626 B2 JP 4010626B2 JP 03724398 A JP03724398 A JP 03724398A JP 3724398 A JP3724398 A JP 3724398A JP 4010626 B2 JP4010626 B2 JP 4010626B2
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Japan
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layer
vinyl acetate
desiccant
packaging bag
pores
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JP03724398A
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JPH11227839A (en
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唯一 坂本
洋 吉家
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Dai Nippon Printing Co Ltd
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Dai Nippon Printing Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は表面に印刷層が設けられていない石灰等の乾燥剤を包装するための包装袋に関する。
【0002】
【従来の技術】
従来、石灰等の乾燥剤を包装するための包装袋としては、紙等の通気性のある基材の表面に印刷層を設け裏面にポリエチレン層を積層した後に、ポリエチレン層を貫通するが紙等の通気性基材は貫通しない細孔を多数設けた構成のもの、ないしは紙等の通気性のある基材の表面に印刷層を設け裏面にポリエチレン層を介して割繊維不織布等を積層し更に割繊維不織布面にポリエチレン層を積層した後に、ポリエチレン層を貫通するが紙等の通気性基材は貫通しない細孔を多数設けた構成のもの等が一般的である。
【0003】
しかしながら、上記の構成の乾燥剤用包装袋のいずれにおいても、紙層の表面に印刷層が形成されているために、内部に乾燥剤を収納した状態で食品と一緒に包装すると、包装されている食品に乾燥剤用包装袋の表面のインキが接触することになり、食品にインキが付着するおそれがある。そのため、印刷インキ工業連合会の制定した「食品包装材料用印刷インキに関する自主規制」(NL規制)に適合するインキを使用して印刷した場合においても、「食品に接触する面への印刷は、インキが食品に移行着色する場合もあり得るので避けるべきである」との見解に適合し得ず、着色剤として食用色素を使用し且つインキバインダーとして食品に接触してもよい樹脂を使用する必要があるために、インキの色調が制限されるとともに、インキが高価であるために乾燥剤用包装袋が高価になってしまうという欠点があった。また、乾燥剤用包装袋は安価で通気性のある紙で構成されているので包装されている食品に紙粉が付着したり、ポリエチレン層を貫通する細孔が形成されているので紙が突き破られて乾燥剤の微粉末が漏れだして食品に付着するという欠点があった。
【0004】
乾燥剤用包装袋の表面のインキが内容物に接触してインキが内容物に付着するという上記の欠点を改良した乾燥剤用包装袋としては、乾燥剤用包装袋の外面となる紙層の内面に印刷層を形成した構成のものが考えられる。しかしながら、紙層の裏面に印刷層を設けた構成の乾燥剤用包装袋においては、紙層の厚さを乾燥剤用包装袋として必要な最小限まで薄くしても、印刷層にPL法上必要な細い文字が含まれる場合に、紙層を通して判読し難いという欠点がある上に、乾燥剤用包装袋は安価で通気性のある紙で構成されているので、包装されている食品に紙粉が付着したり、ポリエチレン層を貫通する細孔が形成されているので、紙が突き破られやすく乾燥剤の微粉末が漏れだして食品に付着するという欠点が解消されないという欠点がある。
【0005】
【発明が解決しようとする課題】
本発明の目的は、印刷されている細い文字が鮮明に読み取れるとともに、一緒に包装される食品等にインキないし紙粉が付着することがなく、且つ乾燥剤の微粉末が漏れ出すことのない乾燥剤用包装袋を提供することにある。
【0006】
【課題を解決するための手段】
本発明の乾燥剤用包装袋は、外面から順に2軸延伸プラスチック層と印刷層と熱可塑性樹脂層とが積層され細孔が形成された外装材の内面に、ポリオレフィン系樹脂からなる格子網状補強材層と酢酸ビニル含有率が6〜30重量%のエチレン−酢酸ビニル共重合体層とが積層された細孔が形成されていない内装材を重ね合わせ、前記内装材を内側にして前記熱可塑性樹脂層と格子網状補強材層とを周縁の熱接着部で接着一体化し熱接着部以外の領域では外装材と内装材とが分離して空隙を形成した構成からなることを特徴とする。また本発明の乾燥剤用包装袋は、外面から順に2軸延伸プラスチック層と印刷層と熱可塑性樹脂層とが積層され細孔が形成された外装材の内面に、ポリオレフィン系樹脂からなる格子網状補強材層と該格子網状補強材層の両面に酢酸ビニル含有率が6〜30重量%のエチレン−酢酸ビニル共重合体層とが積層された細孔が形成されていない内装材を重ね合わせ、前記内装材を内側にして前記熱可塑性樹脂層と前記エチレンー酢酸ビニル共重合体層とを周縁の熱接着部で接着一体化し熱接着部以外の領域では外装材と内装材とが分離して空隙を形成した構成からなる。印刷層が2軸延伸プラスチック層の内面に設けられているので、一緒に包装される食品等に印刷層が接触することがなく、且つ印刷層に細かい文字等がある場合でも透明な2軸延伸プラスチック層を通して鮮明に読み取ることができる。また、内装材に酢酸ビニル含有率が6〜30重量%のエチレン−酢酸ビニル共重合体層を積層することにより細孔を形成しなくとも必要な透湿度が得られるので、細孔から乾燥剤の微粉末が漏れ出してくることがない。更に、乾燥剤用包装袋に紙層を使用しないので紙粉が食品等に付着することもない。
【0007】
上記の乾燥剤用包装袋において、前記外装材に形成する前記細孔を突き刺し孔とすることで、細い針を埋め込んだ簡単な穿孔装置により細孔を形成することができるとともに、形成する細孔の数を変えることにより外装材の透湿度を調節できるので、用途により乾燥剤用包装袋の透湿度を変える必要がある場合でも対応が容易である。また、細孔が小さいので印刷層に細かい文字がある場合でも細孔による影響はなく鮮明に読み取ることができる。
【0008】
上記の乾燥剤用包装袋において、前記エチレン−酢酸ビニル共重合体層の厚さを10〜20μとすることにより、内装材に細孔を形成しなくとも乾燥剤用包装袋として必要な適度の透湿度を確保することができる。
【0010】
上記の乾燥剤用包装袋において、少なくとも前記熱接着部の一部を、袋の端縁より所定の寸法だけ内側の位置に形成され、前記熱可塑性樹脂と前記格子網状補強材層もしくは前記エチレンー酢酸ビニル共重合体層とが剥離可能であることにより、熱接着部の外側の熱接着されていない部分から外装材と内層材間の接着を剥離させることにより乾燥剤用包装袋の吸湿速度を変化させることが可能になる。
【0011】
上記の乾燥剤用包装袋において、前記外装材と前記内装材とを重ね合わせ部分的に接着した状態で周縁を熱接着部により密封した構成とすることにより、乾燥剤を自動充填包装する際に重ね合わされた外装材と内装材とがずれることによりしわが発生する等のトラブルが防止できるので包装適性の優れたものとなる。
【0012】
【発明の実施の形態】
以下、図面を用いて本発明の実施の形態を説明する。図1は第1実施形態を示す平面図、図2は第1実施形態の構成を示す図1におけるI−I断面図、図3は第2実施形態の構成を示す図2に対応した断面図、図4は第3実施形態を示す平面図、図5は第3実施形態の構成を示す図4におけるI−I断面図であり、1, 1’は外装材、2, 2' は内装材、3a, 3bは熱接着部、4は細孔、5は非熱接着部、11は2軸延伸プラスチック層、12は印刷層、13, 13’は熱可塑性樹脂層、21は格子網状補強材層、22,23はエチレン−酢酸ビニル共重合体層をそれぞれ表す。
【0013】
本発明の乾燥剤用包装袋の第1実施形態は図1、図2に示すとおりである。平面形状は、図1に示すように、四角形状の外装材1と内装材2を重ね合わせて内装材2を内側にして2つ折りし折目以外の周縁部を熱接着部3a,3b により接着して密封されており、熱接着部3a,3b において外装材1と内装材2とが接着されて固定されており、熱接着部3a,3b 以外の領域において外装材1と内装材2とは接着されておらず分離して空隙を形成している構成である。外装材1には突き刺しにより形成された貫通する細孔4が多数形成されている。第1実施形態の形状は3方シール袋となっているが、袋の形状は任意であり4方シール袋、ピロータイプ袋とすることもできる。
【0014】
第1実施形態の積層構成は、図2に示すように、外装材1と内装材2とからなり、外装材1は2軸延伸プラスチック層11と印刷層12と熱可塑性樹脂層13との積層体からなり細孔4が形成された構成であり、内装材2は格子網状補強材層21と酢酸ビニル含有率が6〜30重量%のエチレン−酢酸ビニル共重合体層22との積層体からなり細孔が形成されていない構成である。外装材1の熱可塑性樹脂層13面に内装材2の格子網状補強材層21が接するように重ね合わせ、内装材2を内面にして2つ折りし周縁部を熱接着することにより、周縁の熱接着部3a,3b にて外装材1の内面の熱可塑性樹脂13と内装材2の外面の格子網状補強材層21とが接着して外装材1と内装材2とが一体化されており、熱接着部3a,3b 以外の領域では外装材1と内装材2とは接着せずに分離した状態となっている。第1実施形態においては、熱接着部3a,3b 以外の領域においては外装材1と内装材2とは接着されておらず分離しており空隙を形成している状態であるが、熱接着部3a,3b 以外の領域において外装材1と内装材2とを部分的に接着して固定しておくようにしてもよい。格子網状補強材層21としてポリオレフィン系樹脂からなるものが一般的に使用されるので、外装材1の内面の熱可塑性樹脂層13と格子網状補強材層21との熱接着が可能である。
【0015】
内装材2は格子網状補強材層21とエチレン−酢酸ビニル共重合体層22との積層体からなり細孔4は形成されていないが、エチレン−酢酸ビニル共重合体層22として酢酸ビニル含有率が6〜30重量%のエチレン−酢酸ビニル共重合体を使用することにより内装材2の透湿度を大きくすることが可能となるので、外装材1にのみ細孔4を形成しておくだけで、外装材1と内装材2とが周縁の熱接着部3a,3b にて接着されて重合された状態で乾燥剤用包装袋として必要とする透湿度が得られるものである。内装材2には細孔4が形成されていないので、初期には硬い顆粒状であり、内部に収納される乾燥剤が吸湿とともに砕けて微粉末状となっても外部に漏れだす心配はない。また、印刷層12は2軸延伸プラスチック層11の内面に形成されているので、食品と一緒に包装された際にも印刷層12を形成するインキが食品に付着するおそれがなく、且つ印刷層12に細かい文字がある場合でも外部から透明な2軸延伸プラスチック層11を通して鮮明に読み取ることができる。
【0016】
本発明の乾燥剤用包装袋の第2実施形態は図1、図3に示すとおりである。平面形状は、図1に示すとおりで第1実施形態と同じである。第2実施形態の積層構成は、図3に示すとおり、外装材1は第1実施形態と同じであって2軸延伸プラスチック層11と印刷層12と熱可塑性樹脂層13との積層体からなり細孔4が形成された構成であり、内装材2'は酢酸ビニル含有率が6〜30重量%のエチレン−酢酸ビニル共重合体層23と格子網状補強材層21と酢酸ビニル含有率が6〜30重量%のエチレン−酢酸ビニル共重合体層22との積層体からなり細孔が形成されていない構成である。第2実施形態の場合には、乾燥剤用包装袋の周縁の熱接着部3a,3b において、外装材1の内面の熱可塑性樹脂層13面と内装材2'の外面のエチレン−酢酸ビニル共重合体層23面とを熱接着することになるので、外装材1と内装材2との接着性が優れる。第2実施形態の場合においても乾燥剤用包装袋としての効果は第1実施形態と同様である。
【0017】
本発明の乾燥剤用包装袋の第3実施形態の積層構成は、図5に示すとおり、外装材1'は2軸延伸プラスチック層11と印刷層12と易剥離性の熱可塑性樹脂層13' との積層体からなり細孔4が形成された構成であり、内装材2は格子網状補強材層21と酢酸ビニル含有率が6〜30重量%のエチレン−酢酸ビニル共重合体層22との積層体からなり細孔が形成されていない構成である。第3実施形態においても乾燥剤用包装袋としての効果は第1実施形態と同様である。第3実施形態の場合には、熱接着部3bの外側の熱接着されていない領域をきっかけにして外装材1'と内装材2とが接着されている熱接着部3bを剥離することにより、乾燥剤用包装袋の透湿度を調整することができる効果がある。乾燥剤用包装袋の周縁の熱接着部3a,3b において、外装材1'の内面の熱可塑性樹脂層13' 面と内装材2の外面の格子網状補強材層21面とを剥離させる必要があるので、熱可塑性樹脂層13' として易剥離性樹脂を使用することが必要である。第3実施形態の場合においても、内装材をエチレン−酢酸ビニル共重合体層23と格子網状補強材層21とエチレン−酢酸ビニル共重合体層22との積層体からなる構成としてもよい。
【0018】
本発明の乾燥剤用包装袋においては、印刷層12は2軸延伸プラスチック層11の内面に設けられるので表面に露出することがなく、印刷層12を形成するためのインキとしては、印刷インキ工業連合会の制定した「食品包装材料用印刷インキに関する自主規制」(NL規制)に適合する一般的に包装材料の印刷に使用されているインキを使用して印刷することができる。紙層の表面に印刷層が形成されている従来の乾燥剤用包装材のように、着色剤として食用色素を使用し、インキバインダー用樹脂として食品に接触してもよいものを使用する必要がないので、印刷適性の優れた安価なインキを使用することができるとともに任意の色調のインキを使用することができるものである。
【0019】
格子網状補強材層21としては、例えば日石ワリフ(日本石油化学製)、クレネツト(クラボー製)、ソフネツト,ソフクロス(新日本ソフ製)等のポリエチレン、ポリプロピレンなどからなるネツト状物が使用できる。格子の間隔は1〜5mmが適当である。1mm以下のものでは包装材面積の大半を格子状繊維が占めるために水蒸気の透過しやすい面積が狭くなるために、内装材2,2'の単位面積当たりの透湿度が低下するとともに価格が高くなるので実用上好ましくない。一方、格子の間隔が6mm以上のときは内容物の粒状物がその間から突き破って出てきたり、引き裂き強度が低下するという問題がある。最も好ましい間隔は2〜4mmの範囲である。格子網状補強材層21を構成する樹脂としてはポリエチレンないしはポリプロピレンとすることにより、格子網状補強材層21と外装材1, 1' の内面の熱可塑性樹脂層13,13'との熱接着性、およびエチレン−酢酸ビニル共重合体層22,23との接着性に優れるので好ましい。
【0020】
エチレン−酢酸ビニル共重合体層22,23 に使用するエチレン−酢酸ビニル共重合体樹脂は、酢酸ビニル含有率が6〜30重量%のものを使用することが必要である。酢酸ビニル含有率が6重量%以下のものでは透湿度が小さくなり、細孔4を形成しない内装材2としては使用できない。一方、酢酸ビニル含有率が30重量%以上のものでは、熱溶融押出しされたエチレン−酢酸ビニル共重合体層の滑性が悪く製品化が困難でありかつ酢酸ビニル臭が強くなるために使用できない。エチレン−酢酸ビニル共重合層22,23 の厚さとしては、薄くする程透湿度が大きくなるので好ましいのであるが、押出ラミネーシヨン加工時の作業性の面で問題があり、厚くなると押出ラミネーシヨン加工時の作業性の問題はなくなるが透湿度が低下する。したがって、エチレン−酢酸ビニル共重合体層22,23 の厚さとしては10〜20μが適当である。
【0021】
外装材1,1'を構成する2軸延伸プラスチック層11としては、2軸延伸ポリプロピレン、2軸延伸ポリエチレンテレフタレート等が適している。外装材1,1'に形成する細孔4としては、直径が約0.1〜1.0mmの太さの針により突き刺して形成されるものである。突き刺しにより形成される細孔4の大きさは、針の太さにより決まるものであるが、直径が1.0mm程度の太さの針を使用して先端の尖った部分の突き刺す深さにより細孔4の大きさを変化させることもできる。第1、第2実施形態の乾燥剤用包装袋の透湿度の調整は、内装材2,2'の透湿度を乾燥剤用包装袋として必要な最大の透湿度となるように設定しておき、外装材1に形成する細孔4の大きさ、数により外装材1の透湿度を調整することにより行うことができる。第3実施形態の乾燥剤用包装袋の透湿度の調整は、内装材2,2'の透湿度を乾燥剤用包装袋として必要な最大の透湿度に設定するとともに、外装材1'の透湿度を乾燥剤用包装袋として必要な最小の透湿度となるように設定しておき、熱接着部3a,3b において外装材1'と内装材2,2'との接着を部分的に剥離することにより、乾燥剤用包装袋としての透湿度を使用目的に合った適当な透湿度に調整することができるものである。
【0022】
本発明の乾燥剤用包装袋の製造方法としては、先ず、細孔を形成していない外装材および内装材をそれぞれ作製する。外装材に細孔を形成するには、外装材を所定の巾にカットする工程にて針により突き刺して形成するか、ないしは乾燥剤の自動充填包装工程にて針により突き刺して形成することができる。自動充填包装工程にて突き刺し孔を形成する場合は、それぞれ細孔の形成されていない外装材と内装材とを別々のロールから供給し、外装材に細孔を形成してから外装材の内面側に内装材と重ね合わせて周縁を熱接着することにより乾燥剤の自動充填包装を行う。前もって細孔が形成された外装材と細孔が形成されていない内装材とを別々のロールから供給し、外装材の内面側に内装材と重ね合わせて周縁を熱接着することにより乾燥剤の自動充填包装を行うこともできる。細孔が形成された外装材と内装材とを重ね合わせて部分的に接着した状態で自動充填包装機にかける場合には、広巾の状態で外装材に所定の細孔を突き刺しにより形成した後に、内装材と重ね合わせて所定位置にて部分的に熱接着して外装材と内装材とを固定した後に、所定の巾にカットする方法で行う。突き刺し孔を形成する装置としては表面に所定の太さの針を所定間隔で埋め込んだロールを使用して連続で行ってもよいし、所定の太さの針を所定間隔で埋め込んだ突き刺し板を使用して間欠的に行ってもよい。
【0023】
実施例1
厚さ20μの2軸延伸ポリプロピレンフイルムの一方の面に印刷インキ工業連合会の制定した「食品包装材料用印刷インキに関する自主規制」(NL規制)に適合する緑色のインキで細かい文字を含む絵柄を印刷した後に、印刷面に厚さ20μのポリエチレンを押出しラミネーションにより積層した積層体に、径が0.5mmの針を使用して突き刺すことにより1m2 当たり2500個の割合で細孔を形成して外装材を作製した。一方、厚さが55μで密度が8本×8本/インチのポリエチレンクロス(萩原工業製)の片面に、酢酸ビニル含有率が19重量%でMIが15のエチレン−酢酸ビニル共重合体を13μの厚さで押出しラミネーシヨンにより積層して内装材を作製した。上記で得られた外装材および内装材を所定の巾にカットしてロール状とし、ポリエチレン層面と内装材のポリエチレンクロス面とが接するように重ね合わせた状態で、自動充填包装機に装着し周縁部を熱接着して乾燥剤用包装袋を作製した。得られた乾燥剤用包装袋に印刷された細かい文字は2軸延伸ポリプロピレンフイルムを通して鮮明に読み取ることができた。
【0024】
【発明の効果】
以上の通り、本発明の乾燥剤用包装袋は、外面から順に2軸延伸プラスチック層と印刷層と熱可塑性樹脂層とが積層され細孔が形成された外装材の内面に、ポリオレフィン系樹脂からなる格子網状補強材層と酢酸ビニル含有率が6〜30重量%のエチレン−酢酸ビニル共重合体層とが積層された細孔が形成されていない内装材を重ね合わせ、前記内装材を内側にして前記熱可塑性樹脂層と格子網状補強材層とを周縁の熱接着部で接着一体化し熱接着部以外の領域では外装材と内装材とが分離して空隙を形成した構成からなることを特徴とする。また本発明の乾燥剤用包装袋は、外面から順に2軸延伸プラスチック層と印刷層と熱可塑性樹脂層とが積層され細孔が形成された外装材の内面に、ポリオレフィン系樹脂からなる格子網状補強材層と該格子網状補強材層の両面に酢酸ビニル含有率が6〜30重量%のエチレン−酢酸ビニル共重合体層とが積層された細孔が形成されていない内装材を重ね合わせ、前記内装材を内側にして前記熱可塑性樹脂層と前記エチレンー酢酸ビニル共重合体層とを周縁の熱接着部で接着一体化し熱接着部以外の領域では外装材と内装材とが分離して空隙を形成した構成からなる。よって、印刷層が2軸延伸プラスチック層の内面に設けられているので、一緒に包装される食品等に印刷層が接触することがなく、且つ印刷層に細かい文字等がある場合でも透明な2軸延伸プラスチック層を通して鮮明に読み取ることができる。また、内装材に酢酸ビニル含有率が6〜30重量%のエチレン−酢酸ビニル共重合体層を積層することにより細孔を形成しなくとも必要な透湿度が得られるので、細孔から乾燥剤の微粉末が漏れ出してくることがない。更に、乾燥剤用包装袋に紙層を使用しないので紙粉が食品等に付着することもない。
【0025】
上記の乾燥剤用包装袋において、外装材に形成する細孔を突き刺し孔とすることで、簡単な穿孔装置により細孔を形成でき且つ形成する細孔の数を変更しやすいので乾燥剤用包装袋に必要な任意の透湿度が容易に得られるとともに、細孔の径が小さいので印刷層に細かい文字がある場合でも細孔による影響はなく鮮明に読み取ることができる。
【0026】
上記の乾燥剤用包装袋において、エチレン−酢酸ビニル共重合体層の厚さを10〜20μとすることにより、内装材に細孔を形成しなくとも乾燥剤用包装袋として必要な適度の透湿度を確保することができる。
【0028】
上記の乾燥剤用包装袋において、少なくとも前記熱接着部の一部を、袋の端縁より所定の寸法だけ内側の位置に形成され、前記熱可塑性樹脂と前記格子網状補強材層もしくは前記エチレンー酢酸ビニル共重合体層とが剥離可能であることにより、熱接着部の外側の熱接着されていない部分から外装材と内層材間の接着を剥離させることにより乾燥剤用包装袋の吸湿速度を変化させることが可能になる。
【0029】
上記の乾燥剤用包装袋において、外装材と内装材とを重ね合わせ部分的に接着した状態で周縁を熱接着部により密封した構成とすることにより、乾燥剤を自動充填包装する際に重ね合わされた外装材と内装材とがずれることによりしわが発生したり、袋の密封性不良が発生するのを防止することができる。
【図面の簡単な説明】
【図1】本発明の第1実施形態を示す平面図。
【図2】本発明の第1実施形態の構成を示す図1におけるI−I断面図。
【図3】本発明の第2実施形態の構成を示す図2に対応した断面図。
【図4】本発明の第3実施形態を示す平面図。
【図5】本発明の第3実施形態の構成を示す図4におけるI−I断面図。
【符号の説明】
1, 1’ 外装材
2, 2’ 内装材
3a, 3b 熱接着部
4 細孔
5 非熱接着部
11 2軸延伸プラスチック層
12 印刷層
13, 13’ 熱可塑性樹脂層
21 格子網状補強材層
22,23 エチレン−酢酸ビニル共重合体層
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packaging bag for packaging a desiccant such as lime having no printed layer on the surface.
[0002]
[Prior art]
Conventionally, as a packaging bag for packaging a desiccant such as lime, a printing layer is provided on the surface of a breathable base material such as paper, a polyethylene layer is laminated on the back surface, and then the polyethylene layer penetrates the paper. The air permeable base material is provided with a number of pores that do not penetrate, or a printed layer is provided on the surface of the air permeable base material such as paper, and a split fiber nonwoven fabric is laminated on the back surface via a polyethylene layer. In general, a structure in which a polyethylene layer is laminated on the surface of the split fiber nonwoven fabric and then a large number of pores that penetrate the polyethylene layer but do not penetrate paper or other breathable substrates is generally used.
[0003]
However, in any of the desiccant packaging bags having the above-described configuration, the printed layer is formed on the surface of the paper layer. The ink on the surface of the desiccant packaging bag comes into contact with the existing food, and the ink may adhere to the food. Therefore, even when printing using ink that conforms to the “Voluntary Regulations for Printing Inks for Food Packaging Materials” established by the Federation of Printing Ink Industries (NL regulations), “ It is necessary to use food coloring as a colorant and a resin that may come into contact with food as an ink binder because it may be transferred to food and may be avoided. As a result, the color tone of the ink is limited, and the desiccant packaging bag is expensive because the ink is expensive. In addition, the desiccant packaging bag is made of cheap and breathable paper, so paper dust adheres to the food being packaged and pores that penetrate the polyethylene layer are formed, so that the paper sticks out. There was a defect that the fine powder of the desiccant leaked and adhered to the food.
[0004]
As a desiccant packaging bag in which the above-mentioned defect that the ink on the surface of the desiccant packaging bag comes into contact with the contents and the ink adheres to the contents, the paper layer that is the outer surface of the desiccant packaging bag is used. The thing of the structure which formed the printing layer in the inner surface can be considered. However, in a desiccant packaging bag having a printed layer on the back side of the paper layer, the printed layer is applied to the PL method even if the thickness of the paper layer is as thin as the desiccant packaging bag. In addition to the disadvantage that it is difficult to read through the paper layer when the necessary thin characters are included, the desiccant packaging bag is made of cheap and breathable paper, so paper on the food being packaged Since the powder adheres or the pores penetrating the polyethylene layer are formed, there is a drawback that the paper is easily pierced and the fine powder of the desiccant leaks out and adheres to the food.
[0005]
[Problems to be solved by the invention]
It is an object of the present invention to be able to read printed thin characters clearly, to prevent the ink or paper powder from adhering to foods and the like to be packaged together, and to prevent the desiccant fine powder from leaking out. It is to provide a packaging bag for medicines.
[0006]
[Means for Solving the Problems]
The desiccant packaging bag of the present invention is a lattice network reinforcement made of a polyolefin resin on the inner surface of an exterior material in which a biaxially stretched plastic layer, a printing layer, and a thermoplastic resin layer are laminated in order from the outer surface to form pores. An interior material in which pores are not formed, in which a material layer and an ethylene-vinyl acetate copolymer layer having a vinyl acetate content of 6 to 30% by weight are laminated, are overlapped, and the thermoplastic resin with the interior material inside . The resin layer and the lattice network reinforcing material layer are bonded and integrated at the peripheral heat bonding portion, and the exterior material and the interior material are separated to form a gap in a region other than the heat bonding portion . Further, the desiccant packaging bag of the present invention is a lattice network formed of a polyolefin resin on the inner surface of an exterior material in which a biaxially stretched plastic layer, a printing layer, and a thermoplastic resin layer are laminated in order from the outer surface to form pores. The interior material without pores formed by laminating an ethylene-vinyl acetate copolymer layer having a vinyl acetate content of 6 to 30% by weight on both surfaces of the reinforcing material layer and the lattice network reinforcing material layer is superimposed, The thermoplastic resin layer and the ethylene-vinyl acetate copolymer layer are bonded and integrated at the peripheral heat-bonded portion with the interior material facing inward, and the exterior material and the interior material are separated from each other in the region other than the heat-bonded portion. Is formed. Since the printed layer is provided on the inner surface of the biaxially stretched plastic layer, the printed layer does not come into contact with foods that are packaged together, and even if there are fine characters on the printed layer, it is transparent biaxially stretched. It can be read clearly through the plastic layer. In addition, by laminating an ethylene-vinyl acetate copolymer layer having a vinyl acetate content of 6 to 30% by weight on the interior material, the necessary moisture permeability can be obtained without forming pores. No fine powder leaks out. Further, since no paper layer is used in the desiccant packaging bag, paper dust does not adhere to foods and the like.
[0007]
In the desiccant packaging bag, the pores to be formed can be formed by a simple punching device in which a thin needle is embedded, and the pores to be formed by forming the pores to be formed in the exterior material as pierced holes. Since the moisture permeability of the outer packaging material can be adjusted by changing the number of the above, it is easy to cope even when the moisture permeability of the desiccant packaging bag needs to be changed depending on the application. Further, since the pores are small, even if there are fine characters on the printed layer, the pores are not affected and can be read clearly.
[0008]
In the above desiccant packaging bag, by setting the thickness of the ethylene-vinyl acetate copolymer layer to 10 to 20 μm, an appropriate amount necessary as a desiccant packaging bag can be obtained without forming pores in the interior material. Moisture permeability can be ensured.
[0010]
In the desiccant packaging bag, at least a part of the thermal bonding portion is formed at a position inside a predetermined dimension from an edge of the bag, and the thermoplastic resin and the lattice network reinforcing material layer or the ethylene-acetic acid layer are formed. Since the vinyl copolymer layer can be peeled off, the moisture absorption rate of the desiccant packaging bag can be changed by peeling the bond between the exterior and inner layer materials from the non-heat bonded part outside the heat bonded part. It becomes possible to make it.
[0011]
In the desiccant packaging bag described above, when the outer packaging material and the interior packaging material are overlapped and partially bonded, the periphery is sealed with a heat-bonding portion, thereby automatically filling and packaging the desiccant. Since troubles such as generation of wrinkles due to displacement of the laminated exterior material and interior material can be prevented, packaging suitability is improved.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a plan view showing the first embodiment, FIG. 2 is a sectional view taken along the line II in FIG. 1 showing the configuration of the first embodiment, and FIG. 3 is a sectional view corresponding to FIG. 2 showing the configuration of the second embodiment. 4 is a plan view showing the third embodiment, FIG. 5 is a cross-sectional view taken along the line II in FIG. 4 showing the configuration of the third embodiment, 1, 1 ′ is an exterior material, and 2, 2 ′ are interior materials. , 3a and 3b are thermal bonding portions, 4 is a pore, 5 is a non-thermal bonding portion, 11 is a biaxially stretched plastic layer, 12 is a printed layer, 13, 13 'is a thermoplastic resin layer, and 21 is a lattice network reinforcement. Layers 22, 23 represent ethylene-vinyl acetate copolymer layers, respectively.
[0013]
1st Embodiment of the packaging bag for desiccants of this invention is as showing in FIG. 1, FIG. As shown in FIG. 1, the planar shape is such that the rectangular exterior material 1 and the interior material 2 are overlapped, folded inward with the interior material 2 inside, and the peripheral portion other than the crease is bonded by the thermal bonding portions 3a and 3b. The exterior material 1 and the interior material 2 are bonded and fixed at the thermal bonding portions 3a and 3b, and the exterior material 1 and the interior material 2 are separated from each other in the region other than the thermal adhesion portions 3a and 3b. It is the structure which is not adhere | attached but isolate | separated and forms the space | gap. The exterior material 1 has a large number of through-holes 4 formed by piercing. Although the shape of the first embodiment is a three-side sealed bag, the shape of the bag is arbitrary, and a four-side sealed bag or a pillow type bag can also be used.
[0014]
As shown in FIG. 2, the laminated configuration of the first embodiment includes an exterior material 1 and an interior material 2, and the exterior material 1 is a laminate of a biaxially stretched plastic layer 11, a printed layer 12, and a thermoplastic resin layer 13. The interior material 2 is composed of a laminate of a lattice network reinforcing material layer 21 and an ethylene-vinyl acetate copolymer layer 22 having a vinyl acetate content of 6 to 30% by weight. Therefore, the pores are not formed. The outer peripheral material 1 is superposed on the surface of the thermoplastic resin layer 13 so that the lattice mesh reinforcing material layer 21 of the interior material 2 is in contact therewith, the interior material 2 is folded in two and the peripheral edge portion is thermally bonded. The exterior material 1 and the interior material 2 are integrated by bonding the thermoplastic resin 13 on the inner surface of the exterior material 1 and the lattice network reinforcing material layer 21 on the outer surface of the interior material 2 at the bonding portions 3a and 3b. In the regions other than the thermal bonding portions 3a and 3b, the exterior material 1 and the interior material 2 are separated without being bonded. In the first embodiment, the exterior material 1 and the interior material 2 are not bonded and separated in a region other than the heat bonding portions 3a and 3b, and a gap is formed. The exterior material 1 and the interior material 2 may be partially bonded and fixed in a region other than 3a and 3b. Since the lattice network reinforcing material layer 21 is generally made of a polyolefin resin, the thermoplastic resin layer 13 on the inner surface of the exterior material 1 and the lattice network reinforcing material layer 21 can be thermally bonded.
[0015]
The interior material 2 is composed of a laminate of a lattice network reinforcing material layer 21 and an ethylene-vinyl acetate copolymer layer 22, and no pores 4 are formed. However, the ethylene-vinyl acetate copolymer layer 22 has a vinyl acetate content rate. Since the moisture permeability of the interior material 2 can be increased by using an ethylene-vinyl acetate copolymer of 6 to 30% by weight, only the pores 4 are formed only in the exterior material 1. Further, the moisture permeability required for the desiccant packaging bag can be obtained in a state where the exterior material 1 and the interior material 2 are bonded and polymerized at the peripheral heat bonding portions 3a and 3b. Since the interior material 2 has no pores 4, it is initially hard and granular, and there is no fear that the desiccant contained inside will crush with moisture absorption and become a fine powder to leak outside. . Further, since the printing layer 12 is formed on the inner surface of the biaxially stretched plastic layer 11, the ink forming the printing layer 12 is not likely to adhere to the food even when packaged together with the food. Even if there are fine characters in 12, they can be clearly read through the transparent biaxially stretched plastic layer 11 from the outside.
[0016]
A second embodiment of the desiccant packaging bag of the present invention is as shown in FIGS. The planar shape is the same as that of the first embodiment as shown in FIG. As shown in FIG. 3, the laminated structure of the second embodiment is the same as that of the first embodiment, and the exterior material 1 is composed of a laminated body of a biaxially stretched plastic layer 11, a printed layer 12, and a thermoplastic resin layer 13. The interior material 2 ′ has a structure in which pores 4 are formed, and the interior material 2 ′ has an ethylene-vinyl acetate copolymer layer 23, a lattice-like reinforcing material layer 21 having a vinyl acetate content of 6 to 30% by weight, and a vinyl acetate content of 6 It consists of a laminate of ˜30 wt% ethylene-vinyl acetate copolymer layer 22 and no pores are formed. In the case of the second embodiment, in the heat-bonding portions 3a and 3b at the periphery of the desiccant packaging bag, both the thermoplastic resin layer 13 on the inner surface of the exterior material 1 and the ethylene-vinyl acetate on the outer surface of the interior material 2 ' Since the surface of the polymer layer 23 is thermally bonded, the adhesion between the exterior material 1 and the interior material 2 is excellent. Also in the case of the second embodiment, the effect as a desiccant packaging bag is the same as that of the first embodiment.
[0017]
As shown in FIG. 5, the laminated structure of the third embodiment of the desiccant packaging bag of the present invention is that the outer packaging material 1 ′ includes a biaxially stretched plastic layer 11, a printed layer 12, and an easily peelable thermoplastic resin layer 13 ′. The interior material 2 is composed of a lattice network reinforcing material layer 21 and an ethylene-vinyl acetate copolymer layer 22 having a vinyl acetate content of 6 to 30% by weight. It is the structure which consists of a laminated body and the pore is not formed. In the third embodiment, the effect as a desiccant packaging bag is the same as that of the first embodiment. In the case of the third embodiment, by peeling off the heat bonding portion 3b where the exterior material 1 ′ and the interior material 2 are bonded, triggered by the region outside the heat bonding portion 3b that is not heat bonded, There is an effect that the moisture permeability of the desiccant packaging bag can be adjusted. It is necessary to peel off the thermoplastic resin layer 13 ′ on the inner surface of the exterior material 1 ′ and the lattice mesh reinforcing material layer 21 on the outer surface of the interior material 2 at the thermal bonding portions 3 a and 3 b at the periphery of the desiccant packaging bag. Therefore, it is necessary to use an easily peelable resin as the thermoplastic resin layer 13 ′. Also in the case of the third embodiment, the interior material may be configured by a laminate of the ethylene-vinyl acetate copolymer layer 23, the lattice network reinforcing material layer 21, and the ethylene-vinyl acetate copolymer layer 22.
[0018]
In the desiccant packaging bag of the present invention, since the printing layer 12 is provided on the inner surface of the biaxially stretched plastic layer 11, the printing layer 12 is not exposed on the surface. Printing can be performed using ink that is generally used for printing packaging materials that conforms to the “voluntary regulations on printing inks for food packaging materials” (NL regulations) established by the Federation. It is necessary to use food coloring as a colorant and a resin that can come into contact with food as a resin for an ink binder, like a conventional desiccant packaging material in which a printed layer is formed on the surface of a paper layer. Therefore, an inexpensive ink excellent in printability can be used and an ink having an arbitrary color tone can be used.
[0019]
As the lattice network reinforcing material layer 21, for example, a net-like material made of polyethylene, polypropylene or the like such as Nisseki Warif (manufactured by Nippon Petrochemical), Klenett (manufactured by Kurabo), softnet, soft cloth (manufactured by Nippon Steel Sof) can be used. The interval between the gratings is suitably 1 to 5 mm. Since the lattice-shaped fibers occupy most of the packaging material area for items of 1 mm or less, the area where water vapor can easily permeate is narrowed, so the moisture permeability per unit area of the interior materials 2,2 'decreases and the price is high. Therefore, it is not practically preferable. On the other hand, when the interval of the lattice is 6 mm or more, there is a problem that the granular material of the contents breaks out from there, and the tear strength decreases. The most preferred distance is in the range of 2-4 mm. The resin constituting the lattice network reinforcing material layer 21 is made of polyethylene or polypropylene, so that the thermal adhesiveness between the lattice network reinforcing material layer 21 and the thermoplastic resin layers 13 and 13 'on the inner surface of the exterior material 1, 1', In addition, it is preferable because it has excellent adhesion to the ethylene-vinyl acetate copolymer layers 22 and 23.
[0020]
The ethylene-vinyl acetate copolymer resin used for the ethylene-vinyl acetate copolymer layers 22 and 23 must have a vinyl acetate content of 6 to 30% by weight. When the vinyl acetate content is 6% by weight or less, the moisture permeability becomes small and cannot be used as the interior material 2 in which the pores 4 are not formed. On the other hand, when the vinyl acetate content is 30% by weight or more, the heat-extruded ethylene-vinyl acetate copolymer layer is poor in lubricity and difficult to produce and cannot be used because the vinyl acetate odor becomes strong. . The thickness of the ethylene-vinyl acetate copolymer layers 22 and 23 is preferable because the moisture permeability increases as the thickness decreases. However, there is a problem in workability at the time of extrusion lamination processing. The problem of workability during processing is eliminated, but the water vapor transmission rate is reduced. Accordingly, the thickness of the ethylene-vinyl acetate copolymer layers 22 and 23 is suitably 10 to 20 μm.
[0021]
As the biaxially stretched plastic layer 11 constituting the exterior material 1,1 ′, biaxially stretched polypropylene, biaxially stretched polyethylene terephthalate, or the like is suitable. The pores 4 formed in the exterior material 1, 1 ′ are formed by piercing with a needle having a diameter of about 0.1 to 1.0 mm. The size of the pores 4 formed by the piercing is determined by the thickness of the needle, but it is finer depending on the piercing depth of the pointed portion using a needle having a diameter of about 1.0 mm. The size of the hole 4 can also be changed. In adjusting the moisture permeability of the desiccant packaging bag according to the first and second embodiments, the moisture permeability of the interior materials 2, 2 ′ is set to be the maximum moisture permeability required for the desiccant packaging bag. The moisture permeability of the exterior material 1 can be adjusted by adjusting the size and number of the pores 4 formed in the exterior material 1. In adjusting the moisture permeability of the desiccant packaging bag of the third embodiment, the moisture permeability of the interior materials 2, 2 ′ is set to the maximum moisture permeability required for the desiccant packaging bag, and the permeability of the exterior material 1 ′ is adjusted. Humidity is set to be the minimum moisture permeability required for a desiccant packaging bag, and the adhesion between exterior material 1 'and interior material 2 and 2' is partially peeled off at thermal bonding parts 3a and 3b. Thus, the moisture permeability of the desiccant packaging bag can be adjusted to an appropriate moisture permeability suitable for the intended use.
[0022]
As a manufacturing method of the desiccant packaging bag of the present invention, first, an exterior material and an interior material in which pores are not formed are respectively produced. In order to form pores in the exterior material, the exterior material can be formed by piercing with a needle in a process of cutting to a predetermined width, or by piercing with a needle in an automatic filling and packaging process of a desiccant. . When piercing holes are formed in the automatic filling and packaging process, the exterior material and interior material each having no pores are supplied from separate rolls, and after forming the pores in the exterior material, the inner surface of the exterior material The desiccant is automatically filled and packaged by heat-bonding the periphery with the interior material on the side. By supplying the exterior material in which pores are formed in advance and the interior material in which pores are not formed from separate rolls, the inner periphery of the exterior material is overlapped with the interior material, and the periphery is thermally bonded to the desiccant. Automatic filling and packaging can also be performed. When applying the automatic filling and packaging machine in a state where the exterior material and the interior material in which the pores are formed are overlapped and partially adhered, after forming predetermined pores in the exterior material by piercing in a wide state Then, after overlapping the interior material and partially thermally bonding at a predetermined position to fix the exterior material and the interior material, it is cut by a predetermined width. As a device for forming a puncture hole, it may be performed continuously by using a roll having needles of a predetermined thickness embedded in the surface at predetermined intervals, or a piercing plate having needles of a predetermined thickness embedded at predetermined intervals may be used. It may be used intermittently.
[0023]
Example 1
On one side of a 20μ thick biaxially stretched polypropylene film, a pattern containing fine characters with green ink conforming to the “Voluntary Regulations for Printing Inks for Food Packaging Materials” (NL regulations) established by the Printing Ink Industry Association After printing, pores were formed at a rate of 2500 per m 2 by piercing with a needle having a diameter of 0.5 mm into a laminate in which polyethylene having a thickness of 20 μm was laminated on the printing surface by extrusion lamination. An exterior material was produced. On the other hand, 13 μm of an ethylene-vinyl acetate copolymer having a vinyl acetate content of 19% by weight and an MI of 15 was formed on one side of a polyethylene cloth (manufactured by Ebara Industries) having a thickness of 55 μ and a density of 8 × 8 / inch. An interior material was prepared by laminating by extrusion lamination with a thickness of 5 mm. The exterior and interior materials obtained above are cut into a predetermined width to form a roll, and are attached to an automatic filling and packaging machine in a state where the polyethylene layer surface and the polyethylene cloth surface of the interior material are in contact with each other. The parts were thermally bonded to produce a desiccant packaging bag. Fine characters printed on the obtained desiccant packaging bag could be clearly read through the biaxially stretched polypropylene film.
[0024]
【The invention's effect】
As described above, the desiccant packaging bag of the present invention is made from a polyolefin-based resin on the inner surface of an exterior material in which a biaxially stretched plastic layer, a printing layer, and a thermoplastic resin layer are laminated in order from the outer surface to form pores. An interior material in which pores are not formed in which a lattice network reinforcing material layer and an ethylene-vinyl acetate copolymer layer having a vinyl acetate content of 6 to 30% by weight are laminated are overlapped, and the interior material is placed inside. characterized by having the structure in which the exterior member and the interior material has voids formed by separation at the thermoplastic resin layer and the grid reticular reinforcement layer and the area bonded and integrated by thermal bonding portion other than the heat-bonded portion of the peripheral edge of Te And Further, the desiccant packaging bag of the present invention is a lattice network formed of a polyolefin resin on the inner surface of an exterior material in which a biaxially stretched plastic layer, a printing layer, and a thermoplastic resin layer are laminated in order from the outer surface to form pores. The interior material without pores formed by laminating an ethylene-vinyl acetate copolymer layer having a vinyl acetate content of 6 to 30% by weight on both surfaces of the reinforcing material layer and the lattice network reinforcing material layer is superimposed, The thermoplastic resin layer and the ethylene-vinyl acetate copolymer layer are bonded and integrated at the peripheral heat-bonded portion with the interior material facing inward, and the exterior material and the interior material are separated from each other in the region other than the heat-bonded portion. Is formed. Therefore, since the printing layer is provided on the inner surface of the biaxially stretched plastic layer, the printing layer does not come into contact with foods or the like that are packaged together, and is transparent even when there are fine characters on the printing layer. It can be read clearly through the axially stretched plastic layer. In addition, by laminating an ethylene-vinyl acetate copolymer layer having a vinyl acetate content of 6 to 30% by weight on the interior material, the necessary moisture permeability can be obtained without forming pores. No fine powder leaks out. Further, since no paper layer is used in the desiccant packaging bag, paper dust does not adhere to foods and the like.
[0025]
In the above desiccant packaging bag, the pores formed in the exterior material are pierced holes, so that the pores can be formed with a simple punching device and the number of pores to be formed can be easily changed. Arbitrary moisture permeability necessary for the bag can be easily obtained, and since the pore diameter is small, even if there are fine characters on the printed layer, it can be read clearly without being affected by the pores.
[0026]
In the above desiccant packaging bag, by setting the thickness of the ethylene-vinyl acetate copolymer layer to 10 to 20 μm, it is possible to obtain an appropriate transparency required for the desiccant packaging bag without forming pores in the interior material. Humidity can be secured.
[0028]
In the desiccant packaging bag, at least a part of the thermal bonding portion is formed at a position inside a predetermined dimension from an edge of the bag, and the thermoplastic resin and the lattice network reinforcing material layer or the ethylene-acetic acid layer are formed. Since the vinyl copolymer layer can be peeled off, the moisture absorption rate of the desiccant packaging bag can be changed by peeling the bond between the exterior and inner layer materials from the non-heat bonded part outside the heat bonded part. It becomes possible to make it.
[0029]
In the above desiccant packaging bag, the outer peripheral material and the interior material are overlapped and partially bonded, and the periphery is sealed with a heat-bonding portion so that the desiccant is automatically packed and packed. It is possible to prevent wrinkles from occurring due to misalignment between the exterior material and the interior material, and the occurrence of poor sealing performance of the bag.
[Brief description of the drawings]
FIG. 1 is a plan view showing a first embodiment of the present invention.
2 is a cross-sectional view taken along the line II in FIG. 1 showing the configuration of the first embodiment of the present invention.
FIG. 3 is a cross-sectional view corresponding to FIG. 2 showing a configuration of a second embodiment of the present invention.
FIG. 4 is a plan view showing a third embodiment of the present invention.
FIG. 5 is a cross-sectional view taken along the line II in FIG. 4 showing the configuration of the third embodiment of the present invention.
[Explanation of symbols]
1, 1 'exterior material
2, 2 'Interior material
3a, 3b Thermal bonding part 4 Pore 5 Non-thermal bonding part
11 Biaxially stretched plastic layer
12 Print layer
13, 13 'Thermoplastic resin layer
21 Lattice mesh reinforcement
22, 23 Ethylene-vinyl acetate copolymer layer

Claims (6)

外面から順に2軸延伸プラスチック層と印刷層と熱可塑性樹脂層とが積層され細孔が形成された外装材の内面に、ポリオレフィン系樹脂からなる格子網状補強材層と酢酸ビニル含有率が6〜30重量%のエチレン−酢酸ビニル共重合体層とが積層された細孔が形成されていない内装材を重ね合わせ、前記内装材を内側にして前記熱可塑性樹脂層と格子網状補強材層とを周縁の熱接着部で接着一体化し熱接着部以外の領域では外装材と内装材とが分離して空隙を形成した構成からなることを特徴とする乾燥剤用包装袋。On the inner surface of the exterior material in which a biaxially stretched plastic layer, a printing layer, and a thermoplastic resin layer are laminated in order from the outer surface to form pores, a lattice network reinforcing material layer made of polyolefin resin and a vinyl acetate content of 6 to 6 A 30% by weight ethylene-vinyl acetate copolymer layer laminated interior material having no pores is laminated, and the thermoplastic resin layer and the lattice network reinforcing material layer are formed with the interior material inside. A desiccant packaging bag comprising a configuration in which a gap is formed by separating an exterior material and an interior material in a region other than the thermal bonding portion by bonding and integration at a peripheral thermal bonding portion . 外面から順に2軸延伸プラスチック層と印刷層と熱可塑性樹脂層とが積層され細孔が形成された外装材の内面に、ポリオレフィン系樹脂からなる格子網状補強材層と該格子網状補強材層の両面に酢酸ビニル含有率が6〜30重量%のエチレン−酢酸ビニル共重合体層とが積層された細孔が形成されていない内装材を重ね合わせ、前記内装材を内側にして前記熱可塑性樹脂層と前記エチレンー酢酸ビニル共重合体層とを周縁の熱接着部で接着一体化し熱接着部以外の領域では外装材と内装材とが分離して空隙を形成した構成からなることを特徴とする乾燥剤用包装袋。A lattice network reinforcing material layer made of polyolefin resin and the lattice network reinforcing material layer are formed on the inner surface of the exterior material in which a biaxially stretched plastic layer, a printing layer, and a thermoplastic resin layer are laminated in order from the outer surface. The thermoplastic resin is laminated with an interior material having no pores formed by laminating an ethylene-vinyl acetate copolymer layer having a vinyl acetate content of 6 to 30% by weight on both sides, and the interior material is inside. A layer and the ethylene-vinyl acetate copolymer layer are bonded and integrated at a peripheral heat-bonding portion, and a space is formed by separating an exterior material and an interior material in a region other than the heat-bonding portion. Packaging bag for desiccant. 前記外装材に形成された前記細孔が突き刺し孔であることを特徴とする請求項1または請求項2記載の乾燥剤用包装材。The packaging material for a desiccant according to claim 1 or 2 , wherein the pores formed in the exterior material are pierced holes. 前記エチレン−酢酸ビニル共重合体層の厚さが10〜20μであることを特徴とする請求項1から3のいずれか記載の乾燥剤用包装材。The desiccant packaging material according to any one of claims 1 to 3, wherein the ethylene-vinyl acetate copolymer layer has a thickness of 10 to 20 µm. 少なくとも前記熱接着部の一部が、袋の端縁より所定の寸法だけ内側の位置に形成され、前記熱可塑性樹脂と前記格子網状補強材層もしくは前記エチレンー酢酸ビニル共重合体層とが剥離可能であることを特徴とする請求項1〜4のいずれか一項に記載の乾燥剤用包装袋。At least a part of the thermal bonding portion is formed at a position inside a predetermined dimension from the edge of the bag, and the thermoplastic resin and the lattice network reinforcing material layer or the ethylene-vinyl acetate copolymer layer can be peeled off. desiccant packaging bag according to any one of claims 1 to 4, characterized in that. 前記外装材と前記内装材とを重ね合わせ部分的に接着した状態で周縁を熱接着部により密封した構成からなることを特徴とする請求項1〜5のいずれか一項に記載の乾燥剤用包装袋。  6. The desiccant according to claim 1, wherein the exterior material and the interior material are overlapped and partially bonded to each other, and the periphery is sealed by a heat bonding part. Packaging bag.
JP03724398A 1998-02-19 1998-02-19 Packaging bag for desiccant Expired - Fee Related JP4010626B2 (en)

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JP2012051633A (en) * 2010-09-03 2012-03-15 Toppan Printing Co Ltd Separable lid member and container using the same
JP6061569B2 (en) * 2012-08-31 2017-01-18 富士フイルム株式会社 Container, ink cartridge, and ink jet recording method
JP7370690B2 (en) * 2017-12-27 2023-10-30 エステー株式会社 Container, dehumidifier

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