JP3998286B2 - Packaging material - Google Patents

Description

【００１９】
（ｉｉｉ） 他の疎水性ビニル単量体 ０〜２０重量％
〔ただし、各式中、Ｒ^１ はＨまたはＣＨ_３ 、Ｒ^２ は炭素数１〜１８のアルキル基、Ｒ^３ およびＲ^４ はそれぞれＨまたは炭素数１〜２のアルキル基、Ａは炭素数２〜６のアルキレン基である。〕
（ｂ’） ポリエチレンイミン、ポリ（エチレンイミン−尿素）及びポリアミンポリアミドのエチレンイミン付加物、又は、これらのアルキル変性体、アルケニル変性体、ベンジル変性体、もしくは、脂肪族環状炭化水素変性体からなる群より選ばれたポリイミン系化合物： ２０〜３００重量部
（ｃ’） ポリアミンポリアミドのエピクロルヒドリン付加物：
２０〜３００重量部
の割合で配合された組成物の水溶液を塗布し、乾燥して得られたプライマー塗工層。
【００２０】
（ａ’）成分の四級窒素含有アクリル系樹脂は、帯電防止に寄与するプライマーで、これについては特公平２−２９１０号公報に詳しく記載されている。
（ｉｉ）の単量体の例示としては、エチルアクリレート、プロピルアクリレート、ブチルアクリレート、カプリルアクリレート、ステアリルメタクリレート等を挙げることができる。
（ｉｉｉ）の疎水性ビニル単量体としては、スチレン、塩化ビニル等が利用できる。
（ｂ’）成分のポリイミン系化合物は、接着力を強化するプライマーであり、例えば、次の一般式（１）
【００２１】
【化３】

（式中、Ｒ⁵ 〜Ｒ⁸ はそれぞれ独立に、Ｈ、炭素数が１〜２４のアルキル基若しくはアルケニル基、脂肪族環状炭化水素基又はベンジル基であり、ｍは０〜３００、ｎ、ｐ及びｑはそれぞれ１〜３００の数値を表わす。）
【００２２】
で示されるポリエチレンイミン、及びポリアミンポリアミドのエチレンイミン付加物、又は、これらのアルキル変性体、アルケニル変性体、ベンジル変性体、若しくは、脂肪族環状炭化水素変性体からなる群より選ばれたポリイミン系化合物および、ポリ（エチレンイミン−尿素）が挙げられる（特公平２−２９１０号公報、特開平１−１４１７３６号公報）。
【００２３】
（ｃ’）成分のポリアミンポリアミド・エピクロルヒドリン付加物も接着力を強化するプライマーであり、かかるものとしては、炭素数３〜１０の飽和二塩基性カルボン酸とポリアルキレンポリアミンとからポリアミドをエピクロルヒドリンと反応させて得られる水溶性で陽イオン性の熱硬化性樹脂などが挙げられ、このような熱硬化性樹脂の詳細については、特公昭３５−３５４７号公報に詳細に述べられている。
上記炭素数３〜１０の飽和二塩基性カルボン酸の具体例としては、炭素数４〜８のジカルボン酸、特にアジピン酸が挙げられる。
【００２４】
また、上記ポリアルキレンポリアミンの具体例としては、ポリエチレンポリアミン、特に、エチレンジアミン、ジエチレントリアミン、トリエチレンテトラミンであり、就中ジエチレントリアミンである。
これらの成分の他に、炭酸ナトリウム、硫酸ナトリウム、亜硫酸ナトリウム、チオ硫酸ナトリウム、水酸化バリウム、メタ珪酸ナトリウム、ピロ燐酸ソーダ、トリポリ燐酸ソーダ、第一燐酸ソーダ、カリ明礬、アンモニウム明礬等の無機化合物を配合することができる。
【００２５】
これら（ａ’）、（ｂ’）、（ｃ’）成分は、通常、固形分量が一般に０．１〜１０重量％、好ましくは０．１〜５重量％の濃度の水溶液（塗工剤）として用いられる。
また、裏面体（ＩＩ）への塗布量は、固形分量で一般的には０．００５〜２ｇ／ｍ² 、好ましくは０．０２〜１ｇ／ｍ² の範囲である。
プライマーの塗布方法としては、ロール、ブレード、エアーナイフ、サイズプレス等の通常の塗布方式を採用することができる。これを常温〜１００℃で乾燥させることにより膜厚０．００５〜２μｍの塗工層が得られる。
【００２６】
これら（ａ’）、（ｂ’）および（ｃ’）成分の割合は、（ａ’）の窒素含有アクリル系樹脂１００重量部に対し、（ｂ’）のポリイミン系化合物が２０〜３００重量部、好ましくは、２０〜１００重量部、（ｃ’）のポリアミンポリアミドのエピクロルヒドリン付加物が２０〜３００重量部、好ましくは３５〜２００重量部である。これらの組成を保つことにより、裏面材の帯電防止性が保持され、給排性が良好となる。
裏面材（ＩＩ）の不透明度（ＪＩＳ Ｐ−８１３８）は、収納物を引き立たせるため、２０〜１００％、好ましくは３５〜１００％の半透明乃至不透明であるのがよい。
【００２７】
溶断シール：
表面材（Ｉ）と裏面材（ＩＩ）とを裏面材（ＩＩ）の表面層（ｃ）が表面材（Ｉ）と相対向するように重ね、インパルスシーラーを用い、溶断部の温度が１７０〜２３０℃となるように加熱（０．５〜２秒）し、両側面、三側面、或いは全周面を溶断し、包装体を形成する。用途に応じ、図４に示すように予め表面材（Ｉ）が差圧成形され、形成された収納凹部に物品２が挿入されてから裏面材を重ね合せ溶断シールしてブリスターパックとしたり、図２に示す封筒のように開放口を封止するために感圧粘着剤３が舌部に塗布されることもある。
【００２８】
包装体：
包装体の透明な表面材（Ｉ）側には、グラビア印刷４を施してもよい。又、裏面材（ＩＩ）側には、グラビア印刷、オフセット印刷、シルクスクリーン印刷等５を施すことが可能である。
この包装体は、花束包装体、封筒、ダイレクトメール、ブリスターパック、ワイシャツ、風呂敷、ハンカチ等の収納袋等として有用である。
【００２９】
【実施例】
以下、実施例により本発明を更に詳細に説明する。
〈表面材（Ｉ）の製造例〉
例１
ＭＦＲ（メルトフローレート）が４ｇ／１０分のプロピレン単独重合体（融点約１６４℃）９８．５重量％、グリセリンモノステアリド０．５重量％、ソルビトールモノオレエート０．５重量％およびシリカ粉末０．５重量％の組成物（Ａ）、ＭＦＲ６ｇ／１０分のプロピレン・エチレン（エチレン含量４．０重量％）ランダム共重合体（融点約１５１℃）９９．５重量％とシリカ粉末０．５重量％の組成物（Ｂ）をそれぞれ別々の押出機を用いて２１０℃で溶融混練し、これを一台の共押出ダイに供給し、ダイ内で三層に積層（Ｂ／Ａ／Ｂ）し、これを２００℃でフィルム状に共押出し、１３５℃で縦方向に５倍延伸し、次いで１４５℃まで再加熱後、横方向に８倍延伸し、１６０℃でアニーリング処理後、５０℃迄冷却し、コロナ放電処理し、耳部をトリミングして不透明度が２．１％、肉厚２５μｍ（Ｂ／Ａ／Ｂ＝２／２１／２μｍ）の透明な積層二軸延伸フィルムを得た。
【００３０】
例２
油化三昌（株）の防曇性ポリプロピレン二軸延伸フィルム「サンオリエントフィルム＃２０」（商品名）：肉厚２０μｍ、不透明度１．８％を用いた。
〈裏面材（ＩＩ）の製造例〉
例３
（１） メルトフローレート０．８ｇ／１０分、融点約１６５℃のポリプロピレン７９重量％、高密度ポリエチレン５重量％の混合物に平均粒径１．５μｍの炭酸カルシウム１６重量％を配合（ａ）し、２７０℃に設定した押出機にて混練後、フィルム状に押出し、冷却装置により冷却して、無延伸フィルムを得た。このフィルムを、１４０℃に加熱後、縦方向に５倍延伸した。
【００３１】
（２） メルトフローレート（ＭＦＲ）４ｇ／１０分、融点約１６４℃のプロピレン単独重合体（ｂ）と、ＭＦＲ４ｇ／１０分のプロピレン単独重合体９６重量％と平均粒径０．８μｍの炭酸カルシウム粉末３重量％、酸化防止剤１重量％の組成物（ｃ）とを別々の押出機で溶融混練し、ダイ内で積層して共押出したフィルムを（１）の５倍延伸フィルムの両面にｃが外側になるように積層し、ついで６０℃まで冷却後、約１６０℃まで加熱し、テンターで横方向に７．５倍延伸し、１６５℃でアニーリング処理し、６０℃まで冷却し、耳部をスリットして肉厚７５μｍの５層構造（ｃ／ｂ／ａ／ｂ／ｃ＝３／１５／４０／１４／３μｍ）の延伸フィルムを得た。
このものの不透明度は９０％であった。
【００３２】
例４
（１） ＭＦＲが１．０ｇ／１０分のポリプロピレン７５重量％に、高密度ポリエチレン３重量％及び平均粒径１．２μｍの炭酸カルシウム２２重量％を混合した組成物（ａ）、ＭＦＲが１．０ｇ／１０分のポリプロピレン（ｂ）およびＭＦＲが４．０ｇ／１０分のポリプロピレン９７重量％と、平均粒径１．２μｍの炭酸カルシウム３重量％を混合した組成物（ｃ）とをそれぞれ別々の押出機を用いて２６５℃で溶融混練し、これを一台の共押出ダイに供給し、ダイ内で積層（ｃ／ｂ／ａ／ｂ／ｃ）後、積層フィルムを押し出し、これをロール群の周速差を利用して縦方向に５倍延伸した。
【００３３】
（２） 次いで、この五層構造の積層フィルムを６０℃まで冷却した後、再び約１５５℃の温度にまで加熱して、テンターを用いて横方向に７．５倍延伸し、１６５℃の温度でアニーリング処理して、６０℃の温度にまで冷却し、コロナ放電処理した後、耳部をスリットし不透明度が９０％、肉厚８０μｍの五層構造（ｃ／ｂ／ａ／ｂ／ｃ＝３／１７／４０／１７／３μｍ）の延伸フィルムを得た。
【００３４】
例５
例３において、（ａ）の組成をポリプロピレン７２重量％、高密度ポリエチレン５重量％および炭酸カルシウム２３重量％と変更し、かつ、（ａ）のスリット幅を変える他は同様にして肉厚８０μｍの五層構造（ｃ／ｂ／ａ／ｂ／ｃ＝３／１５／４４／１５／３μｍ）の延伸フィルムを得た。
このものの不透明度は９２％であった。
【００３５】
例６
（１）メルトフローレート（ＭＦＲ）１．２ｇ／１０分のポリプロピレン（融点約１６４〜１６７℃）８１重量％に、高密度ポリエチレン７重量％及び平均粒径１．２μｍの焼成シリカ１２重量％を混合した組成物（ａ）を２６５℃の温度に設定した押出機にて混練させた後、シート状に押し出し、更に冷却装置により冷却して、無延伸シートを得た。
そして、このシートを１５２℃の温度にまで再度加熱した後、縦方向５倍の延伸を行って５倍延伸フィルムを得た。
【００３６】
（２） ＭＦＲが４ｇ／１０分のポリプロピレン（融点約１６４℃）（ｂ）、およびＭＦＲが４ｇ／１０分のポリプロピレン９７．２重量％と平均粒径１．２μｍの炭酸カルシウム２．８重量％とを混合した組成物（ｃ）を別々の押出機にて２１０℃で混練させた後、これをダイによりシート状に押し出し、これを上記の（１）工程で得られた５倍延伸フィルムの両面に積層し、五層構造の積層フィルムを得た。次いで、この五層構造の積層フィルムを６０℃の温度にまで冷却した後、再び約１６５℃の温度にまで加熱してテンターを用いて横方向に７．５倍延伸し、１７０℃の温度でアニーリング処理し、６０℃の温度にまで冷却し、耳部をスリットして、不透明度が４２％、肉厚８０μｍ（ｃ／ｂ／ａ／ｂ／ｃ＝１．５／１８／４０／１９／１．５μｍ）の半透明の延伸フィルムを得た。
【００３７】
例７（比較用）
（１） ＭＦＲが１．０ｇ／１０分のポリプロピレン８１重量％に、高密度ポリエチレン３重量％及び平均粒径１．５μｍの炭酸カルシウム１６重量％を混合した組成物（ａ）を２７０℃に設定した押出機にて混練した後、フィルム状に押し出し、冷却装置により冷却して、無延伸フィルムを得た。そして、このフィルムを１４０℃の温度にまで再度加熱した後、縦方向に５倍延伸した。
【００３８】
（２） ＭＦＲが４．０ｇ／１０分のポリプロピレン５４重量％と、平均粒径１．５μｍの炭酸カルシウム４６重量％を混合した組成物（ｂ）を別の押出機にて混練させた後、これをダイよりフィルム状に押し出し、これを（１）の５倍延伸フィルムの両面に積層し、三層構造の積層フィルムを得た。次いで、この三層構造の積層フィルムを６０℃まで冷却した後、再び約１６０℃の温度にまで加熱して、テンターを用いて横方向に７．５倍延伸し、１６５℃の温度でアニーリング処理して、６０℃の温度にまで冷却し、コロナ放電処理した後、耳部をスリットして三層構造（一軸延伸／二軸延伸／一軸延伸）の、肉厚８０μｍ（ｂ／ａ／ｂ＝２０μｍ／４０μｍ／２０μｍ）、白色度９６％、不透明度９４％の延伸フィルムを得た。この延伸フィルムの表面層（ｂ）のベック平滑度（ＪＩＳ Ｐ−８１１９）は５７０秒であった。
【００３９】
例８（比較用）
（１） ＭＦＲが０．８ｇ／１０分のポリプロピレン８０重量％、高密度ポリエチレン８重量％の混合物に平均粒径１．５μｍの炭酸カルシウム１２重量％を配合（ａ）し、２７０℃に設定した押出機にて混練後、フィルム状に押出し、冷却装置により冷却して、無延伸フィルムを得た。このフィルムを１４０℃に加熱後、縦方向に５倍延伸した。
【００４０】
（２） ＭＦＲが４ｇ／１０分のポリプロピレン（ｃ）と、ＭＦＲが４ｇ／１０分のポリプロピレン５５重量％に平均粒径１．５μｍの炭酸カルシウム４５重量％を混合した組成物（ｂ）とを別々の押出機で溶融混練し、ダイ内で積層して共押出したフィルムを（１）の５倍延伸フィルムの片面に（ｃ）が外側となるように積層し、ついでＭＦＲが４ｇ／１０分のポリプロピレン４９重量％とマレイン酸含量０．５重量％のマレイン酸（改質単量体）変性ポリプロピレン５重量％と平均粒径１．５μｍの炭酸カルシウム４６重量％とを混合した組成物（ｅ）（充填剤１００重量部当りの改質単量体０．０５重量部）を、２７０℃に設定した押出機により溶融混練したものと、ＭＦＲが４ｇ／１０分のポリプロピレン５０重量％と平均粒径１．５μｍの炭酸カルシウム５０重量％を混合した組成物（ｄ）を、２７０℃に設定した別の押出機で溶融混練したものとダイ内で積層し、５倍延伸フィルムの反対面に共押出しし、改質ポリプロピレンを含む層（ｅ）が外側となるように積層した。次いで、この五層積層物を１５５℃に加熱したのち横方向に７．５倍の延伸を行なって、五層のフィルムを得た。
【００４１】
（３） この五層積層フィルムの表面をコロナ放電処理し、（ｃ）／（ｂ）／（ａ）／（ｄ）／（ｅ）の各フィルムの肉厚が５／２５／５０／２５／５μｍの５層積層物を得た。
この５層積層物の表面（ｃ）のベック平滑度は８，０００秒で、不透明度は９５％であった。
【００４２】
例９
（１） ＭＦＲが１．０ｇ／１０分のポリプロピレン７７重量％に、高密度ポリエチレン３重量％及び平均粒径１．５μｍの炭酸カルシウム２０重量％を混合（ａ）し，２７０℃に設定した押出機にて混練後、フィルム状に押し出し、冷却装置により冷却して、無延伸フィルムを得た。そして、このフィルムを再度加熱した後、縦方向に５倍延伸した。
【００４３】
（２） ＭＦＲが４ｇ／１０分のポリプロピレン（ｂ）と、ＭＦＲが４ｇ／１０分のポリプロピレン９５．５重量％と粒径０．８μｍのシリカ４重量％と酸化防止剤０．５重量％の組成物（ｃ）とを２７０℃に設定した別々の押出機を用いてそれぞれ溶融混練し、一台の共押出ダイに供給し、ダイ内で積層し、上記（１）にて得られた縦方向５倍延伸フィルムの表面側に共押出した。
【００４４】
一方、ＭＦＲが４．０ｇ／１０分のポリプロピレン５３重量％とマレイン酸含量が０．５重量％のマレイン酸変性ポリプロピレン５重量％と平均粒径１．５μｍの炭酸カルシウム４２重量％とを混合した組成物（ｅ）を、２７０℃に設定した押出機により溶融混練したものと、ＭＦＲが４．０ｇ／１０分のポリプロピレン５５重量％と平均粒径１．５μｍの炭酸カルシウム４５重量％とを混合した組成物（ｄ）を、２７０℃に設定した別の押出機で溶融混練したものとダイ内で積層し、上記（１）にて得られた縦方向５倍延伸フィルムの裏面側に共押出した。
【００４５】
前記五層積層物を１６０℃の加熱オーブン中で、横方向に７．５倍の延伸を行い、ついで１６３℃でアニーリング処理し、コロナ放電処理して、五層の構造（ｃ／ｂ／ａ／ｄ／ｅ）の延伸フィルムからなる肉厚８０μｍ（３／１７／４０／３／１７μｍ）、不透明度９４％の合成紙を得た。ｃ層のベック平滑度は３，２００秒であった。
【００４６】
〈プライマー塗工剤の製造例〉
例１０
下記の組成の塗工剤を用いた。
（ａ’） 次のユニットの三元共重合体 ０．５重量％
【化４】

【００４７】
（ｂ’） ブチル化変性ポリエチレンイミン ０．３重量％
（ｃ’） 水溶性ポリアミンポリアミドのエピクロルヒドリン付加物（日本ＰＭＣ（株）製「ＷＳ−５７０：商品名」） ０．５重量％
（ｄ’） 水 残余
【００４８】
例１１
下記の組成の塗工剤を用いた。
（ａ’） 次のユニットの四元共重合体 １．５重量％
【化５】

【００４９】
【化６】

【化７】

【００５０】
（ｂ’） 下記の製法で得たブチル化変性ポリエチレンイミン ０．２重量％
攪拌機、還流冷却器、温度計及び窒素ガス導入口を備えた四つ口フラスコ内に、日本触媒（株）製ポリエチレンイミン“エポミン Ｐ−１０００”（商品名；重合度１６００）の２５重量％水溶液１００部、ｎ−ブチルクロライド１０部及びイソプロピルアルコール１０部を入れて、窒素気流下で攪拌し、８０℃の温度で２０時間変性反応を行って２０．８重量％濃度のブチル変性ポリエチレンイミン水溶液を得た。
【００５１】
（ｂ’） ポリアミンポリアミドのエチレンイミン付加物（ＢＡＳＦ社製ポリミンＳＮ） ０．３重量％
（ｃ’） 水溶性ポリアミンポリアミドのエピクロルヒドリン付加物（ＷＳ−５７０） ０．５重量％
（ｄ’） 水 残余
【００５２】
〈包装体の製造例〉
（実施例１）
例１の表面材（Ｉ）と、例３の裏面材（ＩＩ）を、裏面材の（ｃ）の層側が表面材（Ｉ）側に相向かうように積層し、次いで富士インパルス（株）製インパルス シーラー ＦＩ−４００Ｙ（商品名）を用い、保持時間３秒、加熱時間約０．６秒、（接着部温度約１８０℃）の条件（条件１）で左右（縦方向）両端部及び上端部（横方向）を溶断シールし、縦寸法１００ｍｍ、横寸法１００ｍｍの三側端溶着袋を得た。
【００５３】
この袋の溶断シール部より１５ｍｍ幅を断才し、引張スピード３０ｍｍ／分の条件で１８０度剥離試験を行って溶断シール強度を測定したところ、縦方向の溶断シール強度は１，９５０ｇ／１５ｍｍ幅、横方向の溶断シール強度は２，５５０ｇ／１５ｍｍ幅であった。
又、溶断シールの条件を、保持時間５秒、加熱時間約０．８秒と変更した（条件２）ところ、縦方向の溶断シール強度は２，２５０ｇ／１５ｍｍ幅、横方向の溶断シール強度は２，７５０ｇ／１５ｍｍ幅であった。
又、袋の口開きは容易に行うことができた。
【００５４】
（実施例２〜６、比較例１〜３ および参考例）
表面材（Ｉ）と裏面材（ＩＩ）の組み合わせを表１のように代える他は実施例１と同様に三方溶断シール袋を得た。
この袋の溶断シール強度と口開き性の結果を表１に示す。
なお、袋は１００袋製造し、全て口開きが容易なものを口開き良好とし、口開きが困難であったものは、その袋数を表中に示した。
【００５５】
（実施例７〜９および比較例４〜５）
裏面材（ＩＩ）として、表１に示す裏面材（ＩＩ）の表裏面に、同表に示すプライマー塗工層を表裏層とも０．０８ｇ／ｍ² の固型分量（肉厚約０．０８μｍ）となるように設けた帯電防止機能、オフセット印刷機能を備えさせた塗工フィルムを用いる他は実施例１と同様にして三方溶断シール袋を製造し、評価した。
結果を表１に示す。
同表の結果から理解されるようにプライマー塗工層の形成は溶断シール強度を特別に低下させるものではない。
【００５６】
【表１】

【００５７】
【発明の効果】
本発明の包装体は、プロピレン系樹脂を素材としているにもかかわらず、溶断シール強度に優れ、袋の口開き性が良好である。
【図面の簡単な説明】
【図１】花束の収納体を示す斜視図である。
【図２】封筒を示す斜視図である。
【図３】本発明の包装体の溶断シール部を示す部分断面図である。
【図４】ブリスターパックの部分断面図である。
【符号の説明】
１ 包装材
２ 物品
３ 感圧粘着剤
４ 印刷
５ 印刷
Ｉ 表面材
ＩＩ 裏面材
ａ 基材層
ｂ 中間層
ｃ 表面層
ｓ 溶断シール部[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a packaging material formed by forming a surface material (I) as a transparent propylene-based resin film, a back surface material (II) as a translucent or opaque resin film, and fusing and sealing at least both side ends thereof. It is.
This packaging material is useful as a bouquet storage package, envelope, direct mail, blister pack and the like.
[0002]
[Prior art]
A bouquet storage in which the surface material (I) is a transparent propylene-based resin film containing an antifogging agent, an opaque resin film serving as a back surface material (II) is superimposed thereon, and both end portions are fused and sealed (S) The envelope 1 in which the body 1 (FIG. 1) and the three side surfaces of the surface material and the back surface material are fused and sealed (S), and the pressure sensitive adhesive (2) is applied to the upper tongue portion of the transparent propylene resin film (I). Figure 2) is used.
[0003]
  The opaque back surface material (II) of the bouquet container 1 or the envelope 1 is normally white on the back side of a polypropylene biaxially stretched film (iii) that is transparent (opacity (JIS P-8138) is 8% or less). Gravure to make it opaqueTheIn contrast to the transparent polypropylene film in which the white bitaglavia printing (iib) side is the outside, in other words, the transparent polypropylene biaxially stretched film (iii) side is the surface material (I).ForThe adhesive strength (1,000 to 3,000 g / 15 mm width) is obtained by the side cross-section fusion (S) between the same kind of polypropylene biaxially stretched films. It is kept.
[0004]
Since these packaging materials (1) use the same kind of polypropylene biaxially stretched film (surface Beck smoothness (JIS P-8119) of 20,000 seconds or more), it is particularly difficult to open the mouth after fusing and sealing. It often occurs in hot and humid summer.
In order to facilitate this opening, opaque synthetic paper (Japanese Examined Patent Publication No. 46-40794, Japanese Examined Publication No. 50-29738, etc.) made of a stretched microporous film containing an inorganic fine powder is used. It was thought that it could be used as the back material of the packaging material 1 because it had a rough surface of 150 to 1,200 seconds and an opacity of 85% or more, but it melted with the polypropylene biaxially stretched film surface material (I). When sealed, the adhesive strength is less than 100 g / 15 mm width. When a bouquet or document is inserted into the package and shaken, the fusing seal (S) peels off and the contents pop out. There was found.
[0005]
On the other hand, PET or PVC resin film for containers having a thickness of 0.1 to 0.5 mm wound in a roll shape is heated and subjected to differential pressure molding using a vacuum and / or pressure forming machine to form a container with a braze, This is trimmed, and this brazed container is automatically supplied to a jig on the sealing machine side, intermittently rotated, and the contents of electronic parts, batteries, etc. are put between them, and then the surface on which the fine paper is printed is made of ethylene / acetic acid. Cover the container with a base material coated with a hot melt adhesive film such as vinyl copolymer or ethylene / methacrylic acid copolymer as a lid, and heat seal the hot melt adhesive film on the container buttock and the base sheet. And then cut and make a blister pack.
However, since the backing paper is a coated fine paper using pulp papermaking paper, there are drawbacks such as lack of water resistance.
[0006]
[Problems to be solved by the invention]
  The present invention is excellent in water resistance, has no blocking property and easily opens, and has a fusing seal strength (adhesive strength) of 500 g / 15 mm width or more, preferably 1,000 to 5,000 g / 15 mm width. Some practically acceptable packagingMaterialThe purpose is to provide.
[0007]
[Means for Solving the Problems]
  In the present invention, one surface material (I) is a transparent propylene resin film, and the other back material (II) is a translucent or opaque thermoplastic resin film having an opacity of 20 to 100%. In the packaging material in which at least both side surfaces of the surface material and the back surface material are fused and sealed, the back surface material (II) includes a propylene-based resin stretched film containing 5 to 65% by weight of an inorganic fine powder or an organic filler as a base material layer ( a) and a propylene-based resin stretched film intermediate layer (b) having a thickness of 3 to 40 μm and containing no inorganic fine powder on at least one side of this base material layer, and 0.5 to 5 of the inorganic fine powder or organic filler. A laminated resin stretched film comprising a propylene-based resin stretched film having a wall thickness of 0.3 to 3 μm as a surface layer (c), wherein the surface layer (c) side of the back surface material (II) is a front surface. For face material (I)ForThe packaging material which is being provided is provided.
[0008]
[Action]
  The surface layer (c) of the back material (II) contains a minute amount of inorganic fine powder of 0.5 to 5% by weight, and the surface is rough enough to prevent blocking. Open mouth is easy. In addition, the content of the inorganic fine powder in the surface layer is very small, and the thickness of the surface layer is 0.3 to3Since it is as thin as μm, the adhesive strength of the fusing seal part with the surface material (I) shows sufficient adhesive strength by welding with the intermediate layer (b) of the back surface material (II) as shown in FIG. .
  Furthermore, since both the front surface material (I) and the back surface material (II) are based on a water-resistant propylene resin, the packaging material is excellent in water resistance.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The packaging material of this invention is demonstrated below.
FIG. 3 is a partial cross-sectional view of the packaging material 1 of the present invention near the side surface. In the figure, 1 is a package, I is a surface material, II is a back material, a is a base material layer, b is an intermediate layer, c is a surface layer, and S is a fusing seal part.
[0010]
Surface material (I):
The surface material (I) is a transparent propylene-based resin film having an opacity of JIS P-8138 of 8% or less, more preferably 3% or less. This is a biaxially stretched film even if it is an unstretched film. It may be. Also, a laminated film structure, for example, propylene / ethylene copolymer, propylene / ethylene / butene-1 copolymer, propylene / butene-1 copolymer on one side or both sides of an intermediate layer of a biaxially stretched film of propylene homopolymer A uniaxial or biaxially stretched film of a propylene-based resin having a lower melting point than that of an intermediate layer such as a coalescence layer may be laminated.
[0011]
In applications where flexibility is required, such as bouquet packages and sealed letters, the surface material (I) is preferably a stretched film having a thickness of 8 to 100 μm, preferably 12 to 40 μm. An unstretched film having a thickness of 250 to 800 μm, preferably 400 to 600 μm, is preferable from the viewpoint of shape retention after molding.
The surface material (I) may contain an antifogging agent such as glycerin monostealide, glycerin distearide, sorbitol monooleate, or an antistatic agent. Moreover, you may mix | blend (1 weight% or less) antiblocking agents, such as a silica powder, in the range which does not impair transparency.
The polypropylene biaxially stretched film of the surface material (I) is a San Orient brand name from Yuka Sansho Co., Ltd., a brand name from Nimura Chemical Industry Co., Ltd., and a Toyobo Co., Ltd. brand name. It is sold under the trade name of anti-fog FG and can be easily obtained.
[0012]
  Back material (II):
  The back material (II) uses a propylene-based resin stretched film containing 5 to 65% by weight of an inorganic fine powder or an organic filler as a base material layer (a), and does not contain an inorganic fine powder on at least one side of the base material layer. A propylene-based resin stretched film intermediate layer (b) having a thickness of 3 to 40 μm and a propylene-based resin stretch having a thickness of 0.3 to 3 μm containing 0.5 to 5% by weight of inorganic fine powder or organic fillerFilm surface layerIt is a laminated resin stretched film which laminates (c).
  The base material layer (a) of the back material may be a single layer or a multilayer structure. Furthermore, the opposite surface of the back surface material on which the surface layer (c) is formed may be bonded with another resin layer, a nonwoven fabric such as spunbond, or a plain woven fabric such as ponge.
[0013]
The laminated structure of the back material (II) includes c / b / a, c / b / a / b / c, c / b / a / adhesive / spunbond nonwoven fabric, c / b / a / adhesive / plain weave Examples thereof include woven fabric, uniaxial or biaxially stretched film (f) of propylene-based resin containing 8 to 65% by weight of c / b / a / inorganic fine powder or organic filler.
The propylene-based resin includes a propylene homopolymer, propylene as a main component, and α-propylene and ethylene, butene-1, hexene-1, pentene-1, 4-methylpentene-1, 3-methylpentene-1, and the like. Examples thereof include copolymers with one or more olefins.
[0014]
As the inorganic fine powder, calcium carbonate, silica, diatomaceous earth, talc, titanium oxide, barium sulfate and the like having a particle size in the range of 0.03 to 5 microns are used. Examples of organic fillers include polyamides such as nylon 6, nylon 66, nylon 6, 10 and nylon 12, which have higher melting points than propylene resins, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyimide, polysulfone, polyether / polysulfone, etc. Is mentioned.
[0015]
  The stretching ratio is preferably 4 to 10 times in both the longitudinal and lateral directions, and the stretching temperature is 140 to when the resin is homopolypropylene (melting point 164 to 167 ° C.).165It is preferable that it is ° C.
  By stretching, fine voids are formed with inorganic fine powder and organic filler as the core, and the opacity of the base material layer (a) is improved.
  The intermediate layer (b) of the back material (II) does not contain an inorganic fine powder because the fusing seal strength with the surface material (I) is sufficient, and the wall thickness is 3 to 40 μm, preferably 5 It must be ˜30 μm.
[0016]
  The surface layer (c) of the back material (II) has a content of inorganic fine powder or organic filler of 0.5 to 0.5 in order to facilitate opening of the package and not to lower the fusing seal strength.5It is necessary to adjust the thickness of the surface layer to 0.3 to 3 μm, preferably 0.5 to 2 μm.
  The wall thickness of the back surface material (II) is 30 to 300 μm, preferably 50 to 150 μm in fields requiring flexibility such as bouquet packages or envelopes, and 30 to 1,000 μm in fields such as blister packs. The thickness is preferably 80 to 800 μm.
  When the primer coating layer (d) having the following composition is provided on one side or both sides of the back surface material (II), the film supply / discharge property at the time of forming the package is improved.
[0017]
Primer coating layer (d):
(A ′) a quaternized product which is an amphoteric product obtained by quaternizing a tertiary nitrogen atom of a polymer obtained by copolymerizing the following monomers (i), (ii) and (iii) with a cationizing agent Nitrogen-containing acrylic resin: 100 parts by weight
[0018]
[Chemical 2]

[0019]
(Iii) Other hydrophobic vinyl monomers 0 to 20% by weight
[However, in each formula, R¹Is H or CH₃, R²Is an alkyl group having 1 to 18 carbon atoms, R³And R⁴Are each H or an alkyl group having 1 to 2 carbon atoms, A is 2 to 6 carbon atomsofAn alkylene group; ]
(B ′) an ethyleneimine adduct of polyethyleneimine, poly (ethyleneimine-urea) and polyamine polyamide, or an alkyl-modified product, an alkenyl-modified product, a benzyl-modified product, or an aliphatic cyclic hydrocarbon-modified product. Polyimine compound selected from the group: 20 to 300 parts by weight
(C ') Epichlorohydrin adduct of polyamine polyamide:
                                                    20-300 parts by weight
The primer coating layer obtained by apply | coating the aqueous solution of the composition mix | blended in the ratio, and drying.
[0020]
The quaternary nitrogen-containing acrylic resin (a ') is a primer that contributes to antistatic properties, and is described in detail in JP-B-2-2910.
Examples of the monomer (ii) include ethyl acrylate, propyl acrylate, butyl acrylate, capryl acrylate, stearyl methacrylate and the like.
As the hydrophobic vinyl monomer (iii), styrene, vinyl chloride and the like can be used.
The polyimine compound as the component (b ′) is a primer that reinforces the adhesive force. For example, the following general formula (1)
[0021]
[Chemical 3]

(Wherein R^Five~ R⁸Are each independently H, an alkyl or alkenyl group having 1 to 24 carbon atoms, an aliphatic cyclic hydrocarbon group or a benzyl group, m is a number from 0 to 300, and n, p and q are each a numerical value from 1 to 300. Represents. )
[0022]
Or a polyimine compound selected from the group consisting of an alkyl-modified product, an alkenyl-modified product, a benzyl-modified product, or an aliphatic cyclic hydrocarbon-modified product. And poly (ethyleneimine-urea) (Japanese Patent Publication No. 2-2910, Japanese Patent Laid-Open No. 1-141736).
[0023]
Component (c ′), a polyamine polyamide / epichlorohydrin adduct, is also a primer that reinforces adhesion, such as reacting a polyamide with epichlorohydrin from a saturated dibasic carboxylic acid having 3 to 10 carbon atoms and a polyalkylene polyamine. Water-soluble and cationic thermosetting resins obtained by the above method are mentioned, and details of such thermosetting resins are described in Japanese Patent Publication No. 35-3547.
Specific examples of the saturated dibasic carboxylic acid having 3 to 10 carbon atoms include dicarboxylic acids having 4 to 8 carbon atoms, particularly adipic acid.
[0024]
Specific examples of the polyalkylene polyamine are polyethylene polyamines, particularly ethylenediamine, diethylenetriamine, and triethylenetetramine, and particularly diethylenetriamine.
In addition to these components, inorganic compounds such as sodium carbonate, sodium sulfate, sodium sulfite, sodium thiosulfate, barium hydroxide, sodium metasilicate, sodium pyrophosphate, sodium tripolyphosphate, sodium monophosphate, potassium alum, and ammonium alum Can be blended.
[0025]
These components (a ′), (b ′) and (c ′) are usually aqueous solutions (coating agents) having a solid content of generally 0.1 to 10% by weight, preferably 0.1 to 5% by weight. Used as
Further, the coating amount on the back surface (II) is generally 0.005 to 2 g / m in terms of solid content.², Preferably 0.02 to 1 g / m²Range.
As a primer application method, a normal application method such as a roll, a blade, an air knife, or a size press can be employed. By drying this at room temperature to 100 ° C., a coating layer having a thickness of 0.005 to 2 μm is obtained.
[0026]
The proportion of these components (a ′), (b ′) and (c ′) is such that the polyimine compound (b ′) is 20 to 300 parts by weight with respect to 100 parts by weight of the nitrogen-containing acrylic resin (a ′). The amount of (c ′) epichlorohydrin adduct of polyamine polyamide is preferably 20 to 300 parts by weight, and preferably 35 to 200 parts by weight. By maintaining these compositions, the antistatic property of the back surface material is maintained, and the supply / discharge performance is improved.
The opacity (JIS P-8138) of the back surface material (II) is 20 to 100%, preferably 35 to 100%, translucent or opaque in order to enhance the stored items.
[0027]
Fusing seal:
The surface material (I) and the back surface material (II) are overlapped so that the surface layer (c) of the back surface material (II) faces the surface material (I), and an impulse sealer is used. Heating is performed at 230 ° C. (0.5 to 2 seconds), and both side surfaces, three side surfaces, or the entire peripheral surface are melted to form a package. Depending on the application, as shown in FIG. 4, the surface material (I) is preliminarily pressure-differentiated, and after the article 2 is inserted into the formed storage recess, the back material is overlapped and fused to form a blister pack. The pressure-sensitive adhesive 3 may be applied to the tongue to seal the opening as in the envelope shown in FIG.
[0028]
Package:
Gravure printing 4 may be performed on the transparent surface material (I) side of the package. Further, gravure printing, offset printing, silk screen printing, and the like 5 can be performed on the back material (II) side.
This package is useful as a storage bag for bouquet packages, envelopes, direct mail, blister packs, shirts, furoshiki, handkerchiefs, and the like.
[0029]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples.
<Example of production of surface material (I)>
Example 1
Propylene homopolymer having an MFR (melt flow rate) of 4 g / 10 min (melting point: about 164 ° C.) 98.5% by weight, glycerin monostearide 0.5% by weight, sorbitol monooleate 0.5% by weight, and silica powder 0.5% by weight of composition (A), MFR 6 g / 10 min propylene / ethylene (ethylene content 4.0% by weight) random copolymer (melting point about 151 ° C.) 99.5% by weight and silica powder 0.5 The composition (B) in weight% was melt-kneaded at 210 ° C. using separate extruders, and this was supplied to one coextrusion die and laminated in three layers in the die (B / A / B) This was coextruded into a film at 200 ° C., stretched 5 times in the machine direction at 135 ° C., then reheated to 145 ° C., stretched 8 times in the transverse direction, annealed at 160 ° C., and then up to 50 ° C. Cool and corona discharge treatment And opacity 2.1% by trimming the ears, to obtain a transparent laminate biaxially oriented film having a thickness of 25μm (B / A / B = 2/21 / 2μm).
[0030]
Example 2
An anti-fogging polypropylene biaxially stretched film “Sun Orient Film # 20” (trade name) manufactured by Yuka Sansho Co., Ltd .: a thickness of 20 μm and an opacity of 1.8% were used.
<Example of production of back surface material (II)>
Example 3
(1) Mixing (a) 16% by weight of calcium carbonate having an average particle size of 1.5 μm with a mixture of 79% by weight of polypropylene having a melt flow rate of 0.8 g / 10 min, a melting point of about 165 ° C. and 5% by weight of high density polyethylene. After kneading with an extruder set at 270 ° C., it was extruded into a film and cooled with a cooling device to obtain an unstretched film. The film was heated to 140 ° C. and then stretched 5 times in the longitudinal direction.
[0031]
(2) Propylene homopolymer (b) having a melt flow rate (MFR) of 4 g / 10 min and a melting point of about 164 ° C., 96% by weight of propylene homopolymer of MFR 4 g / 10 min and an average particle diameter of 0.8 μm calcium carbonate A composition (c) containing 3% by weight of powder and 1% by weight of antioxidant was melt-kneaded by a separate extruder, laminated in a die and coextruded, on both sides of the 5-fold stretched film of (1). Laminate so that c is on the outside, then cool to 60 ° C, heat to about 160 ° C, stretch 7.5 times in the transverse direction with a tenter, anneal at 165 ° C, cool to 60 ° C, The film was slit to obtain a stretched film having a thickness of 75 μm and a five-layer structure (c / b / a / b / c = 3/15/40/14/3 μm).
The opacity of this was 90%.
[0032]
Example 4
(1) A composition (a) in which 3% by weight of high-density polyethylene and 22% by weight of calcium carbonate having an average particle diameter of 1.2 μm are mixed with 75% by weight of polypropylene having an MFR of 1.0 g / 10 min. Polypropylene (b) of 0 g / 10 min and 97 wt% of polypropylene having an MFR of 4.0 g / 10 min and a composition (c) in which 3 wt% of calcium carbonate having an average particle size of 1.2 μm are mixed are separately used. Using an extruder, it is melt-kneaded at 265 ° C., supplied to one coextrusion die, laminated in the die (c / b / a / b / c), extruded a laminated film, and rolled into a group of rolls The film was stretched 5 times in the machine direction using the difference in peripheral speed.
[0033]
(2) Next, after cooling the laminated film of this five-layer structure to 60 ° C., it was heated again to a temperature of about 155 ° C. and stretched 7.5 times in the transverse direction using a tenter, and a temperature of 165 ° C. And then cooled to a temperature of 60 ° C. and subjected to a corona discharge treatment, then the ears were slit and the opacity was 90% and the thickness was 80 μm (c / b / a / b / c = (3/17/40/17/3 μm) was obtained.
[0034]
Example 5
In Example 3, the composition of (a) was changed to 72% by weight of polypropylene, 5% by weight of high-density polyethylene and 23% by weight of calcium carbonate, and the thickness of 80 μm was similarly changed except that the slit width of (a) was changed. A stretched film having a five-layer structure (c / b / a / b / c = 3/15/44/15/3 μm) was obtained.
The opacity of this was 92%.
[0035]
  Example 6
  (1) Melt flow rate (MFR) 1.2 g / 10 minutes of polypropylene (melting point: about 164 to 167 ° C.) 81% by weight, 7% by weight of high density polyethylene and 12% by weight of calcined silica having an average particle size of 1.2 μm The mixed composition (a)265After kneading with an extruder set at a temperature of 0 ° C., it was extruded into a sheet shape and further cooled by a cooling device to obtain an unstretched sheet.
  And after heating this sheet | seat again to the temperature of 152 degreeC, it extended | stretched 5 times of the vertical direction, and obtained the 5-fold stretched film.
[0036]
(2) Polypropylene having an MFR of 4 g / 10 min (melting point: about 164 ° C.) (b), and 97.2 wt% of polypropylene having an MFR of 4 g / 10 min and an average particle size of 1.2 μm of calcium carbonate of 2.8 wt% And kneading the composition (c) in a separate extruder at 210 ° C., and then extruding it into a sheet form with a die, which is the 5-fold stretched film obtained in the above step (1). Lamination was performed on both sides to obtain a laminated film having a five-layer structure. Then, after cooling the laminated film having the five-layer structure to a temperature of 60 ° C., it is again heated to a temperature of about 165 ° C. and stretched 7.5 times in the transverse direction using a tenter, and at a temperature of 170 ° C. Annealing treatment, cooling to a temperature of 60 ° C., slitting the ear, opacity 42%, wall thickness 80 μm (c / b / a / b / c = 1.5 / 18/40/19 / A translucent stretched film of 1.5 μm) was obtained.
[0037]
Example 7 (for comparison)
(1) A composition (a) in which 81% by weight of polypropylene having an MFR of 1.0 g / 10 min and 3% by weight of high-density polyethylene and 16% by weight of calcium carbonate having an average particle size of 1.5 μm is set at 270 ° C. After kneading with the extruder, the film was extruded into a film and cooled with a cooling device to obtain an unstretched film. And after heating this film again to the temperature of 140 degreeC, it extended | stretched 5 times in the vertical direction.
[0038]
(2) After knead | mixing the composition (b) which mixed 54 weight% of polypropylenes with MFR 4.0g / 10min, and 46 weight% of calcium carbonate with an average particle diameter of 1.5 micrometers in another extruder, This was extruded into a film from a die and laminated on both sides of the 5-fold stretched film of (1) to obtain a laminated film having a three-layer structure. Next, after cooling this three-layer laminated film to 60 ° C., it is again heated to a temperature of about 160 ° C., stretched 7.5 times in the transverse direction using a tenter, and annealed at a temperature of 165 ° C. Then, after cooling to a temperature of 60 ° C. and corona discharge treatment, the ears were slit and the three-layer structure (uniaxial stretching / biaxial stretching / uniaxial stretching) having a thickness of 80 μm (b / a / b = 20 μm / 40 μm / 20 μm), a stretched film having a whiteness of 96% and an opacity of 94% was obtained. The Beck smoothness (JIS P-8119) of the surface layer (b) of this stretched film was 570 seconds.
[0039]
Example 8 (for comparison)
(1) 12% by weight of calcium carbonate having an average particle diameter of 1.5 μm was blended (a) in a mixture of 80% by weight of polypropylene having an MFR of 0.8 g / 10 min and 8% by weight of high density polyethylene, and the temperature was set at 270 ° C. After kneading with an extruder, it was extruded into a film and cooled with a cooling device to obtain an unstretched film. This film was heated to 140 ° C. and then stretched 5 times in the longitudinal direction.
[0040]
(2) Polypropylene (c) having an MFR of 4 g / 10 min and a composition (b) in which 55 wt% of polypropylene having an MFR of 4 g / 10 min and 45 wt% of calcium carbonate having an average particle diameter of 1.5 μm are mixed. A film obtained by melt-kneading with a separate extruder, laminated in a die and coextruded is laminated on one side of the 5-fold stretched film of (1) so that (c) is on the outside, and then the MFR is 4 g / 10 min. (E) Mixing 49% by weight of polypropylene, 5% by weight of maleic acid (modified monomer) -modified polypropylene having a maleic acid content of 0.5% by weight, and 46% by weight of calcium carbonate having an average particle size of 1.5 μm (e ) (0.05 parts by weight of modifying monomer per 100 parts by weight of filler) melt-kneaded with an extruder set at 270 ° C. and 50% by weight of polypropylene with an MFR of 4 g / 10 min and an average particle size Diameter 1.5 The composition (d) in which 50% by weight of calcium carbonate of m is mixed is melt-kneaded with another extruder set at 270 ° C. in a die, and coextruded on the opposite side of the 5-fold stretched film. It laminated | stacked so that the layer (e) containing a modified polypropylene might become an outer side. Next, this five-layer laminate was heated to 155 ° C. and then stretched 7.5 times in the transverse direction to obtain a five-layer film.
[0041]
(3) The surface of this five-layer laminated film is subjected to corona discharge treatment, and the thickness of each film of (c) / (b) / (a) / (d) / (e) is 5/25/50/25 / A 5-layer laminate of 5 μm was obtained.
The Beck smoothness of the surface (c) of this five-layer laminate was 8,000 seconds, and the opacity was 95%.
[0042]
Example 9
(1) Extrusion set at 270 ° C. by mixing (a) 77% by weight of polypropylene with an MFR of 1.0 g / 10 min and 3% by weight of high-density polyethylene and 20% by weight of calcium carbonate having an average particle size of 1.5 μm After kneading with a machine, it was extruded into a film and cooled with a cooling device to obtain an unstretched film. And after heating this film again, it extended | stretched 5 times in the vertical direction.
[0043]
(2) Polypropylene (b) having an MFR of 4 g / 10 min, 95.5 wt% of polypropylene having an MFR of 4 g / 10 min, 4 wt% of silica having a particle size of 0.8 μm, and 0.5 wt% of an antioxidant. The composition (c) was melt-kneaded using separate extruders set at 270 ° C., supplied to one coextrusion die, laminated in the die, and the longitudinal length obtained in (1) above. The film was coextruded on the surface side of the 5-fold stretched film.
[0044]
On the other hand, 53% by weight of polypropylene having an MFR of 4.0 g / 10 min, 5% by weight of maleic acid-modified polypropylene having a maleic acid content of 0.5% by weight, and 42% by weight of calcium carbonate having an average particle diameter of 1.5 μm were mixed. The composition (e) was melt-kneaded by an extruder set at 270 ° C. and 55% by weight of polypropylene having an MFR of 4.0 g / 10 min and 45% by weight of calcium carbonate having an average particle diameter of 1.5 μm were mixed. The obtained composition (d) was melt-kneaded with another extruder set at 270 ° C. and laminated in a die, and coextruded on the back side of the longitudinally stretched 5-fold film obtained in (1) above. did.
[0045]
The five-layer laminate was stretched 7.5 times in the transverse direction in a heating oven at 160 ° C., then annealed at 163 ° C., and subjected to corona discharge treatment to obtain a five-layer structure (c / b / a / D / e), a synthetic paper having a wall thickness of 80 μm (3/17/40/3/17 μm) and an opacity of 94% was obtained. The Beck smoothness of the c layer was 3,200 seconds.
[0046]
<Production example of primer coating agent>
  Example 10
  A coating agent having the following composition was used.
(A ′) terpolymer of the next unit 0.5% by weight
[Formula 4]

[0047]
(B ') Butylated modified polyethyleneimine 0.3 wt%
(C ') Epichlorohydrin adduct of water-soluble polyamine polyamide ("WS-570: trade name" manufactured by Nippon PMC Co., Ltd.) 0.5 wt%
(D ’) Water residue
[0048]
  Example 11
  A coating agent having the following composition was used.
(A ′) quaternary copolymer of the next unit 1.5% by weight
[Chemical formula 5]

[0049]
[Chemical 6]

[Chemical 7]

[0050]
(B ') 0.2% by weight of butylated modified polyethyleneimine obtained by the following production method
In a four-necked flask equipped with a stirrer, reflux condenser, thermometer, and nitrogen gas inlet, 25% by weight aqueous solution of polyethyleneimine “Epomin P-1000” (trade name; polymerization degree 1600) manufactured by Nippon Shokubai Co., Ltd. 100 parts, 10 parts of n-butyl chloride and 10 parts of isopropyl alcohol were added, stirred under a nitrogen stream, and subjected to a modification reaction at a temperature of 80 ° C. for 20 hours to obtain a 20.8 wt% butyl-modified polyethyleneimine aqueous solution. Obtained.
[0051]
(B ') Polyamine polyamide ethyleneimine adduct (BASF Polymin SN) 0.3 wt%
(C ') Epichlorohydrin adduct of water-soluble polyamine polyamide (WS-570) 0.5 wt%
(D ’) Water residue
[0052]
<Production example of package>
Example 1
The surface material (I) of Example 1 and the back material (II) of Example 3 were laminated so that the (c) layer side of the back material faces the surface material (I) side, and then manufactured by Fuji Impulse Co., Ltd. Using Impulse Sealer FI-400Y (trade name), left and right (vertical direction) both ends and top ends under conditions (condition 1) of holding time 3 seconds, heating time approximately 0.6 seconds, and (bonding portion temperature approximately 180 ° C.) (Lateral direction) was hermetically sealed to obtain a three-side end welding bag having a vertical dimension of 100 mm and a horizontal dimension of 100 mm.
[0053]
  When the fusing seal strength of 15 mm was cut from the fusing seal part of this bag and the fusing seal strength was measured by performing a 180 degree peel test under the condition of a tensile speed of 30 mm / min, the fusing seal strength in the vertical direction was1,950The g / 15 mm width and the transverse fusing seal strength were 2,550 g / 15 mm width.
  Also, the fusing seal conditions were changed to a holding time of 5 seconds and a heating time of about 0.8 seconds (condition 2). The longitudinal fusing seal strength was 2,250 g / 15 mm width, and the fusing seal strength in the horizontal direction was2,750The width was g / 15 mm.
  Moreover, the opening of the bag could be easily performed.
[0054]
(Examples 2-6, Comparative Examples 1-3 and Reference Examples)
A three-way fused seal bag was obtained in the same manner as in Example 1 except that the combination of the front surface material (I) and the back surface material (II) was changed as shown in Table 1.
Table 1 shows the results of fusing seal strength and openability of the bag.
In addition, 100 bags were manufactured, and those that were easy to open all were considered to have good opening, and those that were difficult to open were shown in the table.
[0055]
(Examples 7-9 and Comparative Examples 4-5)
As the back material (II), the primer coating layer shown in the same table is 0.08 g / m on the front and back surfaces of the back material (II) shown in Table 1.²A three-sided fused seal bag was produced in the same manner as in Example 1 except that a coating film provided with an antistatic function and an offset printing function provided so as to have a solid content (wall thickness of about 0.08 μm) was used. ,evaluated.
The results are shown in Table 1.
As understood from the results in the table, the formation of the primer coating layer does not particularly reduce the fusing seal strength.
[0056]
[Table 1]

[0057]
【The invention's effect】
The package of the present invention is excellent in fusing seal strength and has a good opening property of the bag even though it is made of propylene-based resin.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a bouquet storage body.
FIG. 2 is a perspective view showing an envelope.
FIG. 3 is a partial cross-sectional view showing a fusing seal portion of the package of the present invention.
FIG. 4 is a partial cross-sectional view of a blister pack.
[Explanation of symbols]
1 Packaging material
2 goods
3 Pressure sensitive adhesive
4 printing
5 Printing
I Surface material
II Back material
a Base material layer
b Middle layer
c Surface layer
s Fusing seal part

Claims (3)

One surface material (I) is a transparent propylene-based resin film, and the other back surface material (II) is a translucent or opaque thermoplastic resin film having an opacity of 20 to 100%. In a packaging material in which at least both side ends of the material are fused and sealed, the back surface material (II) is a base material layer (a) comprising a propylene-based resin stretched film containing 5 to 65% by weight of an inorganic fine powder or an organic filler. And a propylene-based resin stretched film intermediate layer (b) having a thickness of 3 to 40 μm and containing no inorganic fine powder on at least one side of the base material layer, and 0.5 to 5 wt% of the inorganic fine powder or organic filler. A laminated resin stretched film obtained by laminating a propylene-based resin stretched film surface layer (c) having a thickness of 0.3 to 3 μm, the surface layer (c) side of the back surface material (II) Is a packaging material facing the surface material (I). The packaging material according to claim 1, wherein the surface material (I) is formed by molding an article storage recess. The packaging material according to claim 1, wherein a primer coating layer (d) having a thickness of 0.005 to 2 µm having the following composition is provided on one side or both sides of the back surface material (II).
Primer coating layer (d)
(A ′) A quaternized product obtained by copolymerizing the following monomers (i), (ii) and (iii) with a quaternizing compound obtained by quaternizing a tertiary nitrogen atom with a cationizing agent. Nitrogen-containing acrylic resin: 100 parts by weight

(Iii) Other hydrophobic vinyl monomers 0-80% by weight
[Wherein, R ¹ is H or CH ₃ , R ² is an alkyl group having 1 to 18 carbon atoms, R ³ and R ⁴ are H or an alkyl group having 1 to 2 carbon atoms, respectively, and A is 2 carbon atoms. Is an alkylene group of .about.6. ]
(B ′) an ethyleneimine adduct of polyethyleneimine, poly (ethyleneimine-urea) and polyaminepolyamide, or an alkyl modified product, an alkenyl modified product, a benzyl modified product, or an aliphatic cyclic hydrocarbon modified product. A polyimine compound selected from the group: 20 to 300 parts by weight,
(C ′) Epichlorohydrin adduct of polyamine polyamide:
20-300 parts by weight,
The primer coating layer obtained by apply | coating the aqueous solution of the composition mix | blended in this ratio, and drying.

Images