JP3818698B2

JP3818698B2 - Magnetic transfer method and method of manufacturing a package using the same

Info

Publication number: JP3818698B2
Application number: JP17991696A
Authority: JP
Inventors: 雄治河本; 弘志高橋; 辰興高見; 定昭渡部
Original assignee: Koei Chemical Co Ltd
Current assignee: Koei Chemical Co Ltd
Priority date: 1995-06-19
Filing date: 1996-06-19
Publication date: 2006-09-06
Anticipated expiration: 2016-06-19
Also published as: JPH0966915A

Description

【０００１】
【発明の属する技術分野】
本発明は、磁性粉含有組成物を磁力転写する方法、及びその方法を用いた包装体例えば磁性粉含有組成物の磁性粉が鉄粉であれば発熱体または袋状脱酸素剤の製造方法に関するものである。
【０００２】
【従来の技術】
従来の磁力転写方法には、磁性粉含有組成物として鉄粉を含有する発熱剤を用いた特開平６−５４８７６号公報等に記載された方法がある。この公報には、２個の回転構造体（Ａ）及び（Ｂ）を用い、回転構造体（Ａ）の周辺部に配列された複数の磁石部に配置した磁性粉含有組成物を、回転構造体（Ｂ）の周辺部に設けられかつ回転構造体（Ａ）の磁石部と対をなす複数の磁石部に連続的に磁力転写する方法が記載されている。なお、以下、回転構造体（Ａ）の磁石部及び回転構造体（Ｂ）の磁石部をそれぞれ磁石部（ａ）及び磁石部（ｂ）という。
【０００３】
【発明が解決しようとする課題】
本発明の目的は、磁石部（ａ）に配置した磁性粉含有組成物を磁石部（ｂ）へ磁力転写する際に、回転構造体（Ｂ）において磁石部（ｂ）以外の箇所に磁性粉含有組成物が付着することを防止して、従来方法を改良した磁力転写方法を提供することにある。
他の目的は、この改良された磁力転写方法を用いて、上記磁性粉含有組成物の付着に起因する、包装体のシール箇所のかみ込みを防止して、効率よく包装体を製造する方法を提供することにある。
【０００４】
【課題を解決するための手段】
本発明者等は、前記課題を解決すべく鋭意検討した結果、周方向に隣り合った磁石部（ｂ）を同じ磁極で互いに対面させると、回転構造体（Ｂ）において磁石部（ｂ）以外の箇所への磁性粉含有組成物の付着を防止できることを見出し、本発明に到達した。
【０００５】
すなわち本発明は、複数の磁石部が配列されかつこれら磁石部に磁性粉含有組成物が保持された回転構造体（Ａ）と、回転構造体（Ａ）に隣接して配設されかつ複数の磁石部が配列された回転構造体（Ｂ）とを用いて、回転構造体（Ａ）の磁石部に保持された磁性粉含有組成物をその磁石部と対向する回転構造体（Ｂ）の磁石部に連続的に磁力転写するにあたり、回転構造体（Ｂ）における周方向に隣り合う磁石部が同じ磁極で互いに対面するように配列されたことを特徴とする磁力転写方法に関するものである。
【０００６】
また、本発明は、複数の磁石部が配列されかつこれら磁石部に磁性粉含有組成物が保持された回転構造体（Ａ）と、回転構造体（Ａ）に隣接して配設され、複数の磁石部が配列されかつこれら磁石部の上に包材（ａ）が配置された回転構造体（Ｂ）とを用いて、下記の工程（１）、及び（２）を順次経て、磁性粉含有組成物を包材（ａ）及び（ｂ）からなる袋に収納してなる包装体を製造する方法において、工程（１）で磁力転写をするにあたり、回転構造体（Ｂ）における周方向に隣り合う磁石部が同じ磁極で互いに対面するように配列されたことを特徴とする包装体の製造方法（以下、第１製造法という）に関するものでもある。
工程（１）：回転構造体（Ａ）の磁石部に保持された磁性粉含有組成物を、その磁石部と対向する回転構造体（Ｂ）の磁石部の上に配置された包材（ａ）表面に、連続的に磁力転写して載置する工程
工程（２）：包材（ａ）表面に載置された磁性粉含有組成物を回転構造体（Ｂ）の磁石部で保持しながら包材（ｂ）で被覆し、両包材をシールする工程ー線を照射して表面に艶消し硬化被膜を形成させた合成樹脂成形品に関するものである。
【０００７】
さらに、本発明は、複数の磁石部が配列されかつこれら磁石部に磁性粉含有組成物が保持された回転構造体（Ａ）と、回転構造体（Ａ）に隣接して配設され、複数の磁石部が配列されかつこれら磁石部の上に包材（ａ）が配置された回転構造体（Ｂ）と、回転構造体（Ｂ）に隣接して配設され、複数の磁石部が配列されかつこれら磁石部の上に包材（ｂ）が配置された回転構造体（Ｃ）を用いて、下記の工程（１）、（２）及び（３）を順次経て、磁性粉含有組成物を包材（ａ）及び（ｂ）からなる袋に収納してなる包装体を製造する方法において、工程（１）及び（２）で磁力転写をするにあたり、それぞれ回転構造体（Ｂ）及び回転構造体（Ｃ）における周方向に隣り合う磁石部が同じ磁極で互いに対面するように配列されたことを特徴とする包装体の製造方法（以下、第２製造法という）に関するものでもある。
工程（１）：回転構造体（Ａ）の磁石部に保持された磁性粉含有組成物を、その磁石部と対向する回転構造体（Ｂ）の磁石部の上に配置された包材（ａ）表面に、連続的に磁力転写して載置する工程
工程（２）：包材（ａ）表面に載置された磁性粉含有組成物を、回転構造体（Ｂ）の磁石部と対向する回転構造体（Ｃ）の磁石部の上に配置された包材（ｂ）表面に連続的に磁力転写して載置しながら、磁性粉含有組成物を包材（ａ）と包材（ｂ）で挟持する工程
工程（３）：磁性粉含有組成物を挟持した包材（ａ）と包材（ｂ）とをシールする工程
なお、以下、回転構造体（Ｃ）の磁石部を磁石部（ｃ）という。
【０００８】
【発明の実施の形態】
本発明において磁力転写とは、一方の磁石部の磁力により保持された磁性粉含有組成物を、その磁力を低下もしくは消滅させて又は遮蔽して他方の磁石部の磁力で後者の磁石部に移動させること、前者の磁石部の磁力よりも後者の磁石部の磁力を増加させて、前者の磁石部の磁力により保持された磁性粉含有組成物を後者の磁石部に移動させること、前者の磁石部の磁力よりも大きい後者の磁石部の磁力を用いて、前者の磁石部の磁力により保持された磁性粉含有組成物を後者の磁石部に移動させること、または両者の磁力差を利用しないで、後者の磁力自体と他の手段との併用によって、前者の磁石部の磁力により保持された磁性粉含有組成物を後者の磁石部に移動させること等を意味する。
【０００９】
本発明の各回転構造体は、ベルト状回転構造体であっても差し支えないが、磁石部又は後述する磁力遮蔽曲板もしくは加温加熱手段を設けやすくするために、通常、ドラム状回転構造体が好んで用いられる。磁石部は、回転構造体の全周面（例えば、回転構造体（Ａ）２１の凹部２２の底部に設けるように回転構造体の周表面に直接、周面全体にわたって磁石部を設けること）に、又はその下部（図１における、回転構造体（Ｂ）３１に設けられた磁石部３４のように、回転構造体の周表面のすぐ裏側に磁石部を設けること）もしくは下方（図１における、回転構造体（Ａ）２１に設けられた磁石部２４のように、回転構造体の周表面の裏側から回転構造体の中心方向に離して磁石部を設けること）に所定間隔で配列される。
【００１０】
磁石部は、ゴム又はプラスチック等との複合材料になっている柔軟な多極着磁構造のシートや１個の磁石で構成するか、複数の磁石を連ねたり、又は磁石とヨークとを組み合わせたりもしくはそれらを交互に連ねたりして構成される。
【００１１】
磁石部の構成は、保持する磁性粉含有組成物の形状、保持する磁性粉含有組成物までの距離及び磁力転写の際の両回転構造体との間の磁力関係等に応じて適宜選択されるが、磁石部の吸着力及び吸引力を効率よくし、かつ磁力転写を容易に行うためには、片面をＮ極とし他面をＳ極とした複数の板状磁石と、これよりも１個多い複数の板状ヨークとを交互に配列してなるものが好ましい。
【００１２】
かかる磁石とヨークからなる磁石部における磁石の配列は、ヨークを介して隣り合う磁石の磁極が同極になるように配列するのが好ましい。磁石部の設置方向は、それぞれの磁石及びヨークが回転構造体の周面と直角になるように、すなわち回転構造体の半径方向になるように設けられるのが好ましい。
【００１３】
本発明の磁力転写方法及び第１製造方法及び第２製造方法においては、前述の磁性粉含有組成物付着を防止するために、回転構造体（Ｂ）における周方向に隣り合う磁石部が同じ磁極で互いに対面するように配列されることが重要である。磁性粉含有組成物付着をより防止するには、回転構造体（Ａ）における周方向に隣り合う磁石部が同じ磁極で互いに対面するように配列されるのが好ましい。より好ましくは、このように配列された磁石部（ａ）の両端部の磁極が磁力転写の際にそれらと対向する磁石部（ｂ）の両端部の磁極と同磁極となるように、回転構造体（Ａ）と回転構造体（Ｂ）を回転させることである。
【００１４】
また、本発明の第２製造方法においては、回転構造体（Ｃ）における周方向に隣り合う磁石部が同じ磁極で互いに対面するように配列されることも重要である。磁性粉含有組成物付着をより防止するには、磁石部（ｂ）の両端部の磁極が磁力転写の際にそれらと対向する磁石部（ｃ）の両端部の磁極と同磁極となるように、回転構造体（Ｂ）と回転構造体（Ｃ）を回転させることが好ましい。
【００１５】
そして各回転構造体に設けられる磁石部は、包装体の形状に適応して保持される磁性粉含有組成物の占有空間部分に対して及ぼす磁力が少なくとも３００ガウス以上になるように設けられるのが好ましい。
磁石部に使用する磁石は電磁石又は永久磁石のいずれも適用できる。
【００１６】
所定量の磁性粉含有組成物を一方の回転構造体からその相手方の回転構造体に確実に磁力転写するためには、磁力転写時に、前者の回転構造体の磁力を低下もしくは消滅させる又は遮蔽する機構を前者の回転構造体が有するか、あるいは後者の回転構造体の磁力を増加させる機構を後者の回転構造体が有するのが好ましい。磁力の増加、低下又は消滅は、磁石として磁力を変化させ得る電磁石を用いるか、又は両回転構造体間において磁力の異なる磁石を設けるかもしくは回転構造体周面からの磁石の設置距離の調整によっても可能である。また磁力の低下又は遮蔽は、固定された磁力遮蔽曲板もしくは磁力遮蔽板を前者の回転構造体の内部又は外部に設け磁力を遮蔽することによっても容易に達成される。
【００１７】
本発明の磁性粉含有組成物としては、（イ）鉄粉等の磁性金属粉末、（ロ）水、（ハ）ハロゲン化金属塩又は硫酸塩等の酸化助剤、及び（ニ）木粉、ヒル石、活性炭、吸水性ポリマー等の保水剤を主成分とする組成物、更にこれら（イ）〜（ニ）の成分に水素発生抑制剤としての無機塩類、配合助剤としてのバインダー又は含浸助剤としての界面活性剤等を加えた組成物が挙げられる。好ましくは、少なくとも鉄粉、水、ハロゲン化金属塩及び活性炭からなる組成物が発熱剤、又は脱酸素剤として用いられる。
【００１８】
本発明の磁力転写方法を用いれば、磁性粉含有組成物を２枚の包材でシールしてなる包装体を製造することができる。例えば磁性粉含有組成物が上述した発熱剤である場合は発熱体が、また脱酸素剤である場合は袋状脱酸素剤が製造される。
【００１９】
発熱体又は袋状脱酸素剤の製造に使用される２枚の包材は、非通気性包材及び通気性包材から選ばれるが、少なくとも１枚は通気性包材からなる。
【００２０】
通気性包材としては、（１）不織布類、（２）多孔質シート類（商品名ＮＦシートもしくはポーラム（トクヤマ製）、商品名セルポア（積水化学製）、商品名ブレスロン（日東電工製）等）又は多孔質シート類と不織布との積層シート、ポリエチレン繊維を積層して加熱加圧してつくられる通気性シート（商品名タイベック（デュポン社製））、（３）不織布にプラスチックフィルムをラミネートした積層シートに刃型等により機械的に穿孔したもの、又は（４）不織布又は多孔質シートに、あらかじめ通気孔を設けたプラスチックフィルムをラミネートしたもの等が用いられる。
【００２１】
非通気性包材としては、内面がポリエチレンフィルム等で構成された従来使用の複合包材であってもよいが、包装体が発熱体のとき、該包材の外面に発熱体装着保持用の粘着剤層及び離型包材を設けたものが好んで使用される。
【００２２】
【実施例】
次に、本発明の磁力転写方法の適用例の一例であって第１製造法の一実施例である、磁性粉含有組成物を発熱剤とする発熱体の製造方法を図１〜図４に基づいて説明する。
【００２３】
発熱体１は図１に示す製造装置３によって製造される。製造装置３は、回転構造体（Ａ）２１及び回転構造体（Ｂ）３１からなる磁力転写装置４と、発熱剤２を回転構造体（Ａ）２１に供給する磁性粉含有組成物供給装置５と、発熱体１の包装袋を形成するための一方の包材フィルムａを繰り出す包材フィルムａ繰り出し装置６と、もう一方の包材フィルムｂを繰り出す包材フィルムｂ繰り出し装置７と、回転構造体（Ｂ）３１の突起部３３とで包材フィルムａとｂとをヒートシールして前記包装袋を形成するシールダイロール８と、カットローラー９から構成されている。
【００２４】
回転構造体（Ａ）２１は、全周面上に所定間隔で発熱体の形状に適応する凹部２２を複数個有し、各凹部２２の底部下方に磁石部２４を配列し、さらに回転構造体（Ｂ）３１と近接する回転前方位置に、固定された磁力遮蔽曲板２５（回転構造体の側面（磁石部が設けられていない面）に配設された固定板に設けられた棒に連結されて固定されており、不動である）を内設したドラム状回転構造体である。回転構造体（Ａ）２１にはその外周に近接して回転ブラシ２８が付設してある。回転ブラシ２８は、発熱剤２を回転構造体（Ａ）２１から回転構造体（Ｂ）３１に移した後、回転構造体（Ａ）２１の周面部分を清掃するものである。
【００２５】
回転構造体（Ｂ）３１は、全周面上に所定間隔で発熱体の形状に適応する凹部３２を複数個有し、各凹部３２の底部の下部に磁石部３４を配列したドラム状回転構造体である。その内部には加熱手段（蒸気加熱）３７を有する。この加熱手段は凹部３２を形成する突起部３３の表面で包材フィルムａを加温予熱し、両包材フィルムのヒートシールを良好にするものである。
回転構造体（Ａ）及び回転構造体（Ｂ）の磁石部の配列はいずれも以下に説明する図３に示すものである。
【００２６】
回転構造体（Ａ）２１と回転構造体（Ｂ）３１とは隣接し、両者の凹部の突起部２３、３３が互いに対向しながら、前者の凹部２２及び磁石部２４は時計方向に、そして後者の凹部３２及び磁石部３４は反時計方向に回転する。
【００２７】
回転構造体（Ａ）２１及び回転構造体（Ｂ）３１の各磁石部は、図２に示すように、複数の磁石１０とこれより１個多いヨーク１１からなり、ヨーク１１と磁石１０とが交互に円周方向に配列され、そして隣接したヨーク１１の相互間に磁石１０がその着磁面でヨーク１１と接触して介装されている。
【００２８】
磁性粉含有組成物供給装置５は、窒素シール可能なホッパー５１を有しており、その排出口付近の内部にはロータリーバルブ５２が設けられている。
【００２９】
包材フィルムａ繰り出し装置６は、ロール状に巻かれた包材フィルムａを支持する支持ローラー６１及び案内ローラー６２を備えている。包材フィルムａは磁力転写部１３に繰り出され、回転構造体（Ｂ）３１の突起部３３に帯び掛けられて加温予熱されながら反時計方向に回転する。
【００３０】
包材フィルムｂ繰り出し装置７は、ロール状に巻かれた包材フィルムｂを支持する支持ローラー７１、案内ローラー７２及び繰り出された包材フィルムｂを予熱するための予熱器７３を備えている。包材フィルムｂはシール部１４に繰り出される。
【００３１】
シールダイロール８は、回転構造体（Ｂ）３１と隣接して配置されている。
【００３２】
回転構造体（Ａ）２１の凹部２２にロータリーバルブ５２を介してホッパー５１から所定量の発熱剤２が供給され、磁石部２４の磁気吸引力により凹部２２に保持される。凹部２２に保持された発熱剤２はその表面をスクレーパー２７で整えられる。
【００３３】
スクレーパー２７で整えられた発熱剤２は回転構造体（Ａ）２１の磁石部２４で保持されながら磁力遮蔽曲板２５に運ばれ、それに到達すると、磁石部の磁力が磁力遮蔽曲板２５で遮蔽されて、その発熱剤２への磁気吸引力の作用が減少する。ここで、磁力遮蔽曲板２５に到達した発熱剤２に、遮蔽された磁石部２４に対向する回転構造体（Ｂ）３１の磁石部３４の磁気吸引力が作用するので、発熱剤２はその磁石部３４上の包材フィルムａの表面に移動し載置され、磁石部３４により所望の形状に保持される。
【００３４】
磁石部３４によって保持された発熱剤２を載置した包材フィルムａはシール部１４に搬送され、シール部１４に繰り出された包材ｂフィルムと、シールダイロール８によってシールされて発熱体シート１２が形成される。
【００３５】
その後、発熱体シート１２のシール箇所が回転構造体（Ｂ）３１に隣接して配設されたカットローラー９にて切断されて、切り離された発熱体１が形成される。
【００３６】
図３は、回転構造体（Ｂ）３１における本発明による磁石部３４の配列の一例を示す部分拡大図である。本例においては、円周方向に隣り合う磁石部３４が同じ磁極で互いに対面するように配列されている。すなわち円周方向に隣り合う磁石部３４ａと３４ｂは対面する磁石が同じ磁極（この場合はＳ極となるように配列されている）であり、また円周方向に隣り合う磁石部３４ｂと３４ｃは対面する磁石が同じ磁極（この場合はＮ極となるように配列されている）である。本例において、回転構造体（Ａ）の磁石部は回転構造体（Ｂ）のそれと同様に、円周方向に隣り合う磁石部が同じ磁極で互いに対面するように配列されている。
【００３７】
図４は、図３に対する比較例として示す回転構造体（Ｂ）の磁石部の配列例を示す部分拡大図あり、円周方向に隣り合う磁石部が異なる磁極で互いに対面するように配列されている。すなわち円周方向に隣り合う磁石部１０１ａと１０１ｂは対面する磁石が異なる磁極（この場合は前者がＮ極であり後者がＳ極となるように配列されている）であり、また円周方向に隣り合う磁石部１０１ｂと１０１ｃは対面する磁石が異なる磁極（この場合は前者がＮ極であり後者がＳ極となるように配列されている）である。この比較例において、回転構造体（Ａ）の磁石部は、円周方向に隣り合う磁石部が同じ磁極で互いに対面するように配列されている。
【００３８】
実施例１及び比較例１
図３及び図４に示す配列例の磁石部を用いて図１の製造装置で発熱体を製造し、製造した発熱体のシール箇所における発熱剤の付着を目視で観察した。その観察結果を表１に示す。
【００３９】
なお各配列例については、各磁石１０に幅Ｗ＝６５ｍｍ、長さＬ＝７０ｍｍ、及び厚さｔ＝２０ｍｍの湿式異方性フェライト磁石（住友特殊金属（株）製ＳＳＲ−３６０Ｈ）であって広い面の一方をＮ極に他方をＳ極に着磁したものを用い、ヨーク１１に幅Ｗ＝６５ｍｍ、長さＬ＝７０ｍｍ、及び厚さｔ₁／ｔ₂＝１０ｍｍ／１ｍｍの軟鉄製のものを用いた（これらのＷ、Ｌ、ｔ₁及びｔ₂は図２に示すとおりである）。発熱剤２は鉄粉１００重量部、活性炭１２重量部、食塩４重量部、ヒル石１８重量部及び水３６重量部からなる組成物を用い、スクレーパー２７で整えられた発熱剤２の重量を３５ｇとし、また回転構造体（Ａ）２１及び回転構造体（Ｂ）３１の回転速度（周速）を３０ｍ／分とした。
【００４０】
実施例１における回転構造体（Ａ）及び回転構造体（Ｂ）の磁石部の配列は図３に示すとおりであって、それらの磁石部の磁石及びヨークは上記のそれらと同様である。また、比較例における回転構造体（Ａ）及び回転構造体（Ｂ）の磁石部の配列は図４に示すとおりあって、それらの磁石部の磁石及びヨークは上記のそれらと同様である。
【００４１】
さらに実施例１及び比較例のいずれにおいても、回転構造体（Ａ）及び（Ｂ）は、磁力転写時に対向する両者の磁石部を構成する磁石の対向面が互いに同極となる状態で回転を開始した。
【００４２】
【表１】

【００４３】
実施例２
磁力転写時に対向する両回転構造体の磁石部を構成する磁石の対向面が互いに異極となるように、両回転構造体を回転させた以外は実施例１と同様にして発熱体を製造し、この発熱体のシール箇所におけるを発熱剤の付着を目視で観察したところ、発熱剤が微量付着していた。
【００４４】
さらに、本発明の磁力転写方法の適用例の他の例であって第２製造法の一実施例である、磁性粉含有組成物を発熱剤とする発熱体の製造方法を図５に基づいて説明する。
【００４５】
発熱体１は図５に示す製造装置３（符号３を図に記載せず）によって製造される。製造装置３は、回転構造体（Ａ）２１、回転構造体（Ｂ）３１及び回転構造体（Ｃ）４１からなる磁力転写装置４（符号４を図に記載せず）と、発熱剤２を回転構造体（Ａ）２１に供給する磁性粉含有組成物供給装置５と、発熱体１の包装袋を形成するための一方の包材フィルムａを繰り出す包材フィルムａ繰り出し装置６と、もう一方の包材フィルムｂを繰り出す包材フィルムｂ繰り出し装置７と、回転構造体（Ｃ）４１の突起部４３とで包材フィルムａとｂとをヒートシールして前記包装袋を形成するシールダイロール８と、カットローラー９から構成されている。
【００４６】
回転構造体（Ａ）２１、回転構造体（Ｃ）４１、シールダイロール８及び磁性粉含有組成物供給装置５はそれぞれ図１の回転構造体（Ａ）２１、回転構造体（Ｂ）３１、シールダイロール８及び磁性粉含有組成物供給装置５と同様なものであり、回転構造体（Ｂ）３１は内部には加熱手段を有しない以外は回転構造体（Ｃ）４１と同様なものである。回転構造体（Ｂ）３１にはその外周に近接して真空清掃ローラー３６が付設してある。
【００４７】
回転構造体（Ａ）２１と回転構造体（Ｂ）３１とは隣接し、両者の凹部の突起部２３、３３が互いに対向しながら、前者の凹部２２及び磁石部２４は時計方向に、そして後者の凹部３２及び磁石部３４は反時計方向に回転する。また、回転構造体（Ｂ）３１と回転構造体（Ｃ）４１とは隣接し、両者の凹部の突起部３３、４３が互いに対向しながら、前者の凹部３２及び磁石部３４は反時計方向に後者の凹部４２及び磁石部４４は時計方向に回転する。
【００４８】
回転構造体（Ａ）２１、回転構造体（Ｂ）３１及び回転構造体（Ｃ）４１の各磁石部は、図２に示すものである。回転構造体（Ａ）２１、回転構造体（Ｂ）３１及び回転構造体（Ｃ）４１の各磁石部は、実施例１の回転構造体（Ｂ）３１と同様な配列である。
【００４９】
包材フィルムａ繰り出し装置６は、ロール状に巻かれた包材フィルムａを支持する支持ローラー６１及び案内ローラー６２を備えている。包材フィルムａは磁力転写部１３ａに繰り出され、回転構造体（Ｂ）３１の突起部に帯び掛けられて反時計方向に回転する。さらに包材フィルムａは磁力転写部１３ｂに移送され、包材フィルムｂと共に時計方向に回転する。
【００５０】
包材フィルムｂ繰り出し装置７は、ロール状に巻かれた包材フィルムｂを支持する支持ローラー７１、案内ローラー７２及び繰り出された包材フィルムｂを予熱するための予熱器７３を備えている。包材フィルムｂは磁力転写部１３ｂに繰り出され、回転構造体（Ｃ）４１の突起部４３に帯び掛けられて加温予熱されながら時計方向に回転する。
【００５１】
回転構造体（Ａ）２１の凹部２２にロータリーバルブ５２を介してホッパー５１から所定量の発熱剤２が供給され、磁石部２４の磁気吸引力により凹部２２に保持される。凹部２２に保持された発熱剤２はその表面をスクレーパー２７で整えられる。
【００５２】
スクレーパー２７で整えられた発熱剤２は回転構造体（Ａ）２１の磁石部２４で保持されながら磁力遮蔽曲板２５に運ばれ、それに到達すると、磁石部２４の磁力が磁力遮蔽曲板２５で遮蔽されて、その発熱剤２への磁気吸引力の作用が減少する。ここで、磁力遮蔽曲板２５に到達した発熱剤２に、遮蔽された磁石部２４に対向する回転構造体（Ｂ）３１の磁石部３４の磁気吸引力が作用するので、発熱剤２はその磁石部３４上の包材フィルムａの表面に移動し載置され、磁石部３４により所望の形状に保持される。磁石部３４によって保持された発熱剤２を載置した包材フィルムａはそのシール面に相当する部分が真空清掃ローラー３６にて清掃されながら磁力転写部１３ｂに搬送される。
【００５３】
発熱剤２は磁力転写部１３ｂに到達すると、回転構造体（Ｃ）４１の磁石部４４の磁力及び包材フィルムａの張力により包材フィルムｂに移動し載置され、所望の形状に保持され、同時に包材フィルムａ及びｂで挟持される。また発熱剤２は磁石部４４によって所望の形状に保持される。
【００５４】
このようにして発熱剤２を挟持した包材フィルムａ及びｂはシール部１４に搬送され、シールダイロール８によりシールされて発熱体シート１２が形成される。
【００５５】
その後、発熱体シート１２は、回転構造体（Ｃ）４１に隣接して配設されたカットローラー９にて発熱体シートのシール箇所が切断されて、切り離された発熱体１が形成される。
【００５６】
【発明の効果】
本発明の方法によれば、回転構造体（Ｂ）において周方向に隣り合う磁石部が同じ磁極で互いに対面するように配列されているので、回転構造体（Ｂ）において磁石部以外の箇所への磁性粉含有組成物の付着が防止され、安定した磁力転写が可能となる。
また、本発明の方法によれば、上記磁性粉含有組成物の付着に起因する、包装体のシール箇所のかみ込みが防止され、このかみ込みによる不良品が激減し効率よく包装体を製造することができる。
【図面の簡単な説明】
【図１】本発明の包装体の製造法に係る一実施例を示す略断面図である。
【図２】図１及び図５に示す磁石部の斜視図である。
【図３】図１における磁石部の配列の一例を示す部分拡大図である。
【図４】比較例における磁石部の配列を示す部分拡大図である。
【図５】本発明の包装体の製造法に係る他の実施例を示す略断面図である。
【符号の説明】
１発熱体
２発熱剤
４磁力転写装置
６包材フィルムａ繰り出し装置
７包材フィルムｂ繰り出し装置
１０磁石
１１ヨーク
１２発熱体シート
１３磁力転写部
１３ａ磁力転写部
１３ｂ磁力転写部
２１回転構造体（Ａ）
２４磁石部
２５磁力遮蔽曲板
３１回転構造体（Ｂ）
３４磁石部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for magnetically transferring a magnetic powder-containing composition, and a method for producing a heating element or a bag-like oxygen scavenger if the magnetic powder of the magnetic powder-containing composition is iron powder. Is.
[0002]
[Prior art]
As a conventional magnetic transfer method, there is a method described in JP-A-6-54876 using a heat generating agent containing iron powder as a magnetic powder-containing composition. In this publication, two rotating structures (A) and (B) are used, and a magnetic powder-containing composition arranged in a plurality of magnet parts arranged in the peripheral part of the rotating structure (A) A method is described in which a magnetic force is continuously transferred to a plurality of magnet portions that are provided in the peripheral portion of the body (B) and are paired with the magnet portions of the rotating structure (A). Hereinafter, the magnet part of the rotating structure (A) and the magnet part of the rotating structure (B) are referred to as a magnet part (a) and a magnet part (b), respectively.
[0003]
[Problems to be solved by the invention]
The object of the present invention is to magnetically transfer a magnetic powder-containing composition arranged in the magnet part (a) to a part other than the magnet part (b) in the rotating structure (B) when magnetically transferring the composition to the magnet part (b). An object of the present invention is to provide a magnetic transfer method that prevents the containing composition from adhering and improves the conventional method.
Another object of the present invention is to use this improved magnetic transfer method to prevent the biting of the sealing part of the package due to the adhesion of the magnetic powder-containing composition and to efficiently manufacture the package. It is to provide.
[0004]
[Means for Solving the Problems]
As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that when the magnet parts (b) adjacent in the circumferential direction face each other with the same magnetic pole, the rotating structure (B) other than the magnet part (b) The present inventors have found that the magnetic powder-containing composition can be prevented from adhering to these locations.
[0005]
That is, the present invention includes a rotating structure (A) in which a plurality of magnet parts are arranged and a magnetic powder-containing composition is held in these magnet parts, and a rotating structure (A) that is disposed adjacent to the rotating structure (A). Using the rotating structure (B) in which the magnet portions are arranged, the magnetic powder-containing composition held in the magnet portion of the rotating structure (A) is used as the magnet of the rotating structure (B) facing the magnet portion. The present invention relates to a magnetic force transfer method characterized in that the magnet portions adjacent in the circumferential direction in the rotating structure (B) are arranged so as to face each other with the same magnetic pole when transferring the magnetic force continuously to the portions.
[0006]
Further, the present invention provides a rotating structure (A) in which a plurality of magnet parts are arranged and a magnetic powder-containing composition is held in these magnet parts, and is disposed adjacent to the rotating structure (A). And the rotating structure (B) in which the wrapping material (a) is arranged on the magnet parts, and sequentially through the following steps (1) and (2), the magnetic powder In the method for producing a package body in which the containing composition is housed in a bag made of the packaging materials (a) and (b), magnetic transfer is performed in the step (1) in the circumferential direction of the rotating structure (B). The present invention also relates to a method for manufacturing a package (hereinafter referred to as a first manufacturing method), wherein adjacent magnet portions are arranged so as to face each other with the same magnetic pole.
Step (1): Wrapping material (a) in which the magnetic powder-containing composition held in the magnet part of the rotating structure (A) is disposed on the magnet part of the rotating structure (B) facing the magnet part. ) The process of continuously transferring magnetic force on the surface
Step (2): The magnetic powder-containing composition placed on the surface of the packaging material (a) is covered with the packaging material (b) while being held by the magnet portion of the rotating structure (B), and both packaging materials are sealed. The present invention relates to a synthetic resin molded article having a matte cured film formed on the surface by irradiating a process line.
[0007]
Furthermore, the present invention provides a rotating structure (A) in which a plurality of magnet parts are arranged and a magnetic powder-containing composition is held in these magnet parts, and is disposed adjacent to the rotating structure (A). A rotating structure (B) in which the magnet parts are arranged and the wrapping material (a) is arranged on the magnet parts, and the rotating structure (B) is arranged adjacent to the rotating structure (B). Using the rotating structure (C) in which the packaging material (b) is disposed on these magnet parts, the magnetic powder-containing composition is sequentially subjected to the following steps (1), (2) and (3). In the method for producing a package body in which the packaging material (a) and (b) are stored in the packaging material (a) and (b), the rotating structure (B) and the rotation structure are respectively used for magnetic transfer in the steps (1) and (2). The magnet parts adjacent in the circumferential direction in the structure (C) are arranged so as to face each other with the same magnetic pole. Method for manufacturing a package for (hereinafter, referred to as a second manufacturing method) also relates to certain.
Step (1): Wrapping material (a) in which the magnetic powder-containing composition held in the magnet part of the rotating structure (A) is disposed on the magnet part of the rotating structure (B) facing the magnet part. ) The process of continuously transferring magnetic force on the surface
Step (2): The magnetic powder-containing composition placed on the surface of the packaging material (a) was placed on the magnet part of the rotating structure (C) facing the magnet part of the rotating structure (B). A step of sandwiching the magnetic powder-containing composition between the packaging material (a) and the packaging material (b) while continuously transferring the magnetic force onto the surface of the packaging material (b).
Step (3): A step of sealing the packaging material (a) and the packaging material (b) sandwiching the magnetic powder-containing composition.
Hereinafter, the magnet part of the rotating structure (C) is referred to as a magnet part (c).
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the magnetic transfer means that the magnetic powder-containing composition held by the magnetic force of one magnet part is moved to the latter magnet part by reducing or extinguishing the magnetic force or shielding it. Increasing the magnetic force of the latter magnet part over the magnetic force of the former magnet part, and moving the magnetic powder-containing composition held by the magnetic force of the former magnet part to the latter magnet part, Use the magnetic force of the latter magnet part, which is greater than the magnetic force of the part, to move the magnetic powder-containing composition held by the magnetic force of the former magnet part to the latter magnet part, or do not use the magnetic difference between the two It means that the magnetic powder-containing composition held by the magnetic force of the former magnet part is moved to the latter magnet part by the combined use of the latter magnetic force itself and other means.
[0009]
Each rotating structure of the present invention may be a belt-like rotating structure, but in order to make it easy to provide a magnet part, a magnetic shielding plate or a heating means described later, usually a drum-like rotating structure. Is preferred. The magnet portion is on the entire circumferential surface of the rotating structure (for example, the magnet portion is provided directly on the circumferential surface of the rotating structure so as to be provided on the bottom of the recess 22 of the rotating structure (A) 21). Or the lower part (providing a magnet part just behind the peripheral surface of the rotating structure like the magnet part 34 provided in the rotating structure (B) 31 in FIG. 1) or below (in FIG. Like the magnet part 24 provided in the rotating structure (A) 21, the magnet parts are arranged at a predetermined interval apart from the back side of the peripheral surface of the rotating structure in the central direction of the rotating structure.
[0010]
The magnet part is composed of a flexible multi-pole magnetized sheet or a single magnet made of a composite material such as rubber or plastic, or a combination of a plurality of magnets, or a combination of a magnet and a yoke. Or it is constituted by connecting them alternately.
[0011]
The configuration of the magnet part is appropriately selected according to the shape of the magnetic powder-containing composition to be held, the distance to the magnetic powder-containing composition to be held, the magnetic force relationship between the rotating structures during magnetic transfer, and the like. However, in order to improve the attractive force and attractive force of the magnet part and to easily perform magnetic transfer, a plurality of plate magnets having one side as the N pole and the other side as the S pole, and one more than this. A structure in which a plurality of plate-like yokes are alternately arranged is preferable.
[0012]
It is preferable that the magnets in the magnet portion including the magnet and the yoke are arranged so that the magnetic poles of the magnets adjacent to each other through the yoke are the same. It is preferable that the magnet portions are installed such that the respective magnets and yokes are perpendicular to the circumferential surface of the rotating structure, that is, in the radial direction of the rotating structure.
[0013]
In the magnetic transfer method, the first manufacturing method, and the second manufacturing method of the present invention, the magnet portions adjacent in the circumferential direction in the rotating structure (B) have the same magnetic pole in order to prevent the above-described magnetic powder-containing composition from adhering. It is important that they are arranged so as to face each other. In order to further prevent adhesion of the magnetic powder-containing composition, it is preferable that the magnet parts adjacent in the circumferential direction in the rotating structure (A) are arranged so as to face each other with the same magnetic pole. More preferably, the rotating structure is such that the magnetic poles at both ends of the magnet part (a) arranged in this way are the same as the magnetic poles at both ends of the magnet part (b) facing the magnet part during magnetic transfer. The body (A) and the rotating structure (B) are rotated.
[0014]
In the second manufacturing method of the present invention, it is also important that magnet portions adjacent in the circumferential direction in the rotating structure (C) are arranged so as to face each other with the same magnetic pole. In order to further prevent adhesion of the magnetic powder-containing composition, the magnetic poles at both ends of the magnet part (b) are made to be the same as the magnetic poles at both ends of the magnet part (c) opposed to the magnetic part during magnetic transfer. The rotating structure (B) and the rotating structure (C) are preferably rotated.
[0015]
And the magnet part provided in each rotary structure should be provided so that the magnetic force exerted on the occupied space portion of the magnetic powder-containing composition held in conformity with the shape of the package will be at least 300 gauss or more. preferable.
Either an electromagnet or a permanent magnet can be applied to the magnet used in the magnet section.
[0016]
In order to securely transfer a predetermined amount of the magnetic powder-containing composition from one rotating structure to the other rotating structure, the magnetic force of the former rotating structure is reduced or eliminated or shielded during magnetic transfer. Preferably, the former rotating structure has a mechanism, or the latter rotating structure has a mechanism for increasing the magnetic force of the latter rotating structure. The increase, decrease, or disappearance of the magnetic force can be achieved by using an electromagnet that can change the magnetic force as the magnet, or by providing a magnet having a different magnetic force between the two rotating structures or adjusting the installation distance of the magnet from the circumferential surface of the rotating structure. Is also possible. The reduction or shielding of the magnetic force can be easily achieved by providing a fixed magnetic shielding plate or magnetic shielding plate inside or outside the former rotating structure to shield the magnetic force.
[0017]
The magnetic powder-containing composition of the present invention includes (a) magnetic metal powder such as iron powder, (b) water, (c) an oxidation aid such as a metal halide salt or sulfate, and (d) wood powder, Compositions mainly composed of water-retaining agents such as leesite, activated carbon, water-absorbing polymers, etc., and further (i) to (d), inorganic salts as hydrogen generation inhibitors, binders or impregnation aids as compounding aids. The composition which added surfactant etc. as an agent is mentioned. Preferably, a composition comprising at least iron powder, water, metal halide salt and activated carbon is used as a heat generating agent or oxygen scavenger.
[0018]
If the magnetic transfer method of this invention is used, the package formed by sealing a magnetic powder containing composition with two packaging materials can be manufactured. For example, when the magnetic powder-containing composition is the exothermic agent described above, a heating element is produced, and when it is an oxygen scavenger, a bag-like oxygen absorber is produced.
[0019]
The two packaging materials used for producing the heating element or the bag-like oxygen absorber are selected from a non-breathable packaging material and a breathable packaging material, but at least one is composed of a breathable packaging material.
[0020]
Examples of breathable packaging materials include: (1) Non-woven fabrics, (2) Porous sheets (trade name NF sheet or Porum (manufactured by Tokuyama), trade name Serpore (manufactured by Sekisui Chemical), brand name Breslon (manufactured by Nitto Denko), etc. ) Or a laminated sheet of porous sheets and nonwoven fabric, a breathable sheet (trade name Tyvek (manufactured by DuPont)) made by laminating polyethylene fibers and heating and pressurizing, (3) Lamination by laminating a plastic film on the nonwoven fabric A sheet that is mechanically perforated by a blade or the like, or (4) a non-woven fabric or a porous sheet laminated with a plastic film provided with vent holes in advance is used.
[0021]
The non-breathable packaging material may be a conventional composite packaging material whose inner surface is made of polyethylene film or the like, but when the packaging body is a heating element, the outer surface of the packaging material is used for mounting and holding the heating element. What provided the adhesive layer and the release packaging material is used preferably.
[0022]
【Example】
Next, FIGS. 1 to 4 show a manufacturing method of a heating element using a magnetic powder-containing composition as a heating agent, which is an example of an application example of the magnetic transfer method of the present invention and an example of the first manufacturing method. This will be explained based on.
[0023]
The heating element 1 is manufactured by the manufacturing apparatus 3 shown in FIG. The manufacturing apparatus 3 includes a magnetic transfer device 4 including a rotating structure (A) 21 and a rotating structure (B) 31, and a magnetic powder-containing composition supply device 5 that supplies the heating agent 2 to the rotating structure (A) 21. A packaging material film a feeding device 6 for feeding out one packaging material film a for forming a packaging bag for the heating element 1, a packaging material film b feeding device 7 for feeding out the other packaging material film b, and a rotating structure It is composed of a sealing die roll 8 and a cut roller 9 that heat-seal the packaging material films a and b with the projection 33 of the body (B) 31 to form the packaging bag.
[0024]
The rotating structure (A) 21 has a plurality of recesses 22 adapted to the shape of the heating element at predetermined intervals on the entire circumferential surface, and a magnet portion 24 is arranged below the bottom of each recess 22, and the rotating structure (B) Connected to a rod provided on a fixed plate provided on a fixed magnetic shielding curved plate 25 (side surface of the rotating structure (surface on which no magnet portion is provided)) at a rotational front position close to 31 It is a drum-like rotating structure that is fixed and fixed. A rotating brush 28 is attached to the rotating structure (A) 21 in the vicinity of the outer periphery thereof. The rotating brush 28 cleans the peripheral surface portion of the rotating structure (A) 21 after the heat generating agent 2 is transferred from the rotating structure (A) 21 to the rotating structure (B) 31.
[0025]
The rotating structure (B) 31 has a plurality of concave portions 32 adapted to the shape of the heating element at predetermined intervals on the entire circumferential surface, and a drum-shaped rotating structure in which magnet portions 34 are arranged below the bottom of each concave portion 32. Is the body. Inside, there is a heating means (steam heating) 37. This heating means warms and preheats the packaging material film a on the surface of the projection 33 that forms the recess 32, thereby improving the heat sealing of both packaging material films.
The arrangement of the magnet portions of the rotating structure (A) and the rotating structure (B) is shown in FIG. 3 described below.
[0026]
The rotary structure (A) 21 and the rotary structure (B) 31 are adjacent to each other, and the

protrusions

23 and 33 of the recesses of the both are opposed to each other, while the former recess 22 and the magnet part 24 are clockwise and the latter. The recess 32 and the magnet portion 34 of the magnet rotate counterclockwise.
[0027]
As shown in FIG. 2, each magnet portion of the rotating structure (A) 21 and the rotating structure (B) 31 includes a plurality of magnets 10 and one more yoke 11. The magnets 10 are alternately arranged in the circumferential direction, and the magnets 10 are interposed between the adjacent yokes 11 in contact with the yokes 11 at their magnetized surfaces.
[0028]
The magnetic powder-containing composition supply device 5 has a hopper 51 capable of nitrogen sealing, and a rotary valve 52 is provided in the vicinity of the discharge port.
[0029]
The packaging material film a feeding device 6 includes a support roller 61 and a guide roller 62 that support the packaging material film a wound in a roll shape. The wrapping material film a is fed to the magnetic transfer portion 13 and is attached to the protrusion 33 of the rotating structure (B) 31 and rotates counterclockwise while being preheated.
[0030]
The packaging material b feeding device 7 includes a support roller 71 that supports the packaging material film b wound in a roll shape, a guide roller 72, and a preheater 73 for preheating the fed packaging material film b. The packaging material film b is fed out to the seal portion 14.
[0031]
The seal die roll 8 is disposed adjacent to the rotating structure (B) 31.
[0032]
A predetermined amount of the heating agent 2 is supplied from the hopper 51 to the concave portion 22 of the rotating structure (A) 21 via the rotary valve 52 and is held in the concave portion 22 by the magnetic attraction force of the magnet portion 24. The surface of the heat generating agent 2 held in the concave portion 22 is prepared by a scraper 27.
[0033]
The exothermic agent 2 prepared by the scraper 27 is carried to the magnetic shield curved plate 25 while being held by the magnet portion 24 of the rotating structure (A) 21. When reaching the magnetic shield 25, the magnetic force of the magnet portion is shielded by the magnetic shield curved plate 25. Thus, the action of the magnetic attractive force on the heat generating agent 2 is reduced. Here, since the magnetic attractive force of the magnet portion 34 of the rotating structure (B) 31 facing the shielded magnet portion 24 acts on the heating agent 2 that has reached the magnetic shielding curved plate 25, the heating agent 2 It moves to and is placed on the surface of the packaging material film a on the magnet part 34, and is held in a desired shape by the magnet part 34.
[0034]
The packaging material film a on which the heat generating agent 2 held by the magnet unit 34 is placed is conveyed to the sealing unit 14 and is sealed by the packaging material b film fed to the sealing unit 14 and the sealing die roll 8 to be a heating element sheet. 12 is formed.
[0035]
Thereafter, the sealing portion of the heating element sheet 12 is cut by the cut roller 9 disposed adjacent to the rotating structure (B) 31 to form the separated heating element 1.
[0036]
FIG. 3 is a partially enlarged view showing an example of the arrangement of the magnet portions 34 according to the present invention in the rotating structure (B) 31. In this example, the magnet parts 34 adjacent in the circumferential direction are arranged so as to face each other with the same magnetic pole. That is, the magnet parts 34a and 34b adjacent to each other in the circumferential direction are the same magnetic poles (in this case, arranged so as to be S poles), and the magnet parts 34b and 34c adjacent to each other in the circumferential direction are The magnets facing each other are the same magnetic poles (in this case, arranged so as to be N poles). In this example, the magnet parts of the rotating structure (A) are arranged so that the magnet parts adjacent in the circumferential direction face each other with the same magnetic pole, like that of the rotating structure (B).
[0037]
FIG. 4 is a partially enlarged view showing an arrangement example of the magnet portions of the rotating structure (B) shown as a comparative example with respect to FIG. 3, in which the magnet portions adjacent in the circumferential direction are arranged to face each other with different magnetic poles. Yes. That is, the magnet portions 101a and 101b adjacent in the circumferential direction are magnetic poles having different magnets facing each other (in this case, the former is arranged so as to be an N pole and the latter is an S pole), and in the circumferential direction. Adjacent magnet portions 101b and 101c are magnetic poles with different facing magnets (in this case, the former is arranged so as to be an N pole and the latter is an S pole). In this comparative example, the magnet parts of the rotating structure (A) are arranged so that magnet parts adjacent in the circumferential direction face each other with the same magnetic pole.
[0038]
Example 1 and Comparative Example 1
A heating element was manufactured with the manufacturing apparatus of FIG. 1 using the magnet portions of the arrangement example shown in FIGS. 3 and 4, and the adhesion of the heating agent at the seal portion of the manufactured heating element was visually observed. The observation results are shown in Table 1.
[0039]
For each arrangement example, each magnet 10 is a wet anisotropic ferrite magnet (SSR-360H manufactured by Sumitomo Special Metal Co., Ltd.) having a width W = 65 mm, a length L = 70 mm, and a thickness t = 20 mm. Using one of the wide surfaces magnetized with N pole and the other with S pole, the yoke 11 has a width W = 65 mm, a length L = 70 mm, and a thickness t ₁ / T ₂ = 10 mm / 1 mm made of soft iron (W, L, t ₁ And t ₂ Is as shown in FIG. The exothermic agent 2 is composed of 100 parts by weight of iron powder, 12 parts by weight of activated carbon, 4 parts by weight of salt, 18 parts by weight of leechite and 36 parts by weight of water, and the weight of the exothermic agent 2 prepared by the scraper 27 is 35 g. In addition, the rotational speed (circumferential speed) of the rotating structure (A) 21 and the rotating structure (B) 31 was set to 30 m / min.
[0040]
The arrangement of the magnet parts of the rotating structure (A) and the rotating structure (B) in Example 1 is as shown in FIG. 3, and the magnets and yokes of these magnet parts are the same as those described above. Further, the arrangement of the magnet parts of the rotating structure (A) and the rotating structure (B) in the comparative example is as shown in FIG. 4, and the magnets and yokes of these magnet parts are the same as those described above.
[0041]
Furthermore, in both Example 1 and the comparative example, the rotating structures (A) and (B) rotate in a state where the opposing surfaces of the magnets constituting both the magnet parts opposing at the time of magnetic force transfer have the same polarity. Started.
[0042]
[Table 1]

[0043]
Example 2
A heating element was manufactured in the same manner as in Example 1 except that both rotating structures were rotated so that the opposing surfaces of the magnets constituting the magnet portions of both rotating structures facing each other at the time of magnetic force transfer were different from each other. As a result of visual observation of the adhesion of the heat generating agent at the sealing portion of the heat generating element, a slight amount of the heat generating agent was adhered.
[0044]
Furthermore, a manufacturing method of a heating element using a magnetic powder-containing composition as a heating agent, which is another example of the application example of the magnetic transfer method of the present invention and is an example of the second manufacturing method, based on FIG. explain.
[0045]
The heating element 1 is manufactured by a manufacturing apparatus 3 (reference numeral 3 is not shown) shown in FIG. The manufacturing apparatus 3 includes a magnetic transfer device 4 (reference numeral 4 is not shown in the drawing) composed of a rotating structure (A) 21, a rotating structure (B) 31, and a rotating structure (C) 41, and a heating agent 2. Magnetic powder-containing composition supply device 5 for supplying to rotating structure (A) 21, packaging material film a feeding device 6 for feeding out one packaging material film a for forming a packaging bag for heating element 1, and the other A sealing die roll for forming the packaging bag by heat-sealing the packaging material films a and b with the packaging material film feeding device 7 for delivering the packaging material film b and the protrusion 43 of the rotating structure (C) 41 8 and a cut roller 9.
[0046]
The rotating structure (A) 21, the rotating structure (C) 41, the seal die roll 8 and the magnetic powder-containing composition supply device 5 are respectively the rotating structure (A) 21, the rotating structure (B) 31 in FIG. It is the same as the sealing die roll 8 and the magnetic powder-containing composition supply device 5, and the rotating structure (B) 31 is the same as the rotating structure (C) 41 except that it does not have heating means inside. is there. A vacuum cleaning roller 36 is attached to the rotating structure (B) 31 in the vicinity of the outer periphery thereof.
[0047]
The rotary structure (A) 21 and the rotary structure (B) 31 are adjacent to each other, and the

protrusions

23 and 33 of the recesses of the both are opposed to each other, while the former recess 22 and the magnet part 24 are clockwise and the latter. The recess 32 and the magnet portion 34 of the magnet rotate counterclockwise. The rotating structure (B) 31 and the rotating structure (C) 41 are adjacent to each other, and the

protrusions

33 and 43 of the recesses of the both are opposed to each other, while the former recess 32 and the magnet part 34 are counterclockwise. The latter concave portion 42 and magnet portion 44 rotate in the clockwise direction.
[0048]
Each magnet part of the rotating structure (A) 21, the rotating structure (B) 31, and the rotating structure (C) 41 is as shown in FIG. The magnet parts of the rotating structure (A) 21, the rotating structure (B) 31, and the rotating structure (C) 41 are arranged in the same manner as the rotating structure (B) 31 of the first embodiment.
[0049]
The packaging material film a feeding device 6 includes a support roller 61 and a guide roller 62 that support the packaging material film a wound in a roll shape. The packaging material film a is fed to the magnetic force transfer portion 13a, is attached to the protrusion of the rotating structure (B) 31, and rotates counterclockwise. Furthermore, the packaging material film a is transferred to the magnetic transfer portion 13b and rotates clockwise together with the packaging material film b.
[0050]
The packaging material b feeding device 7 includes a support roller 71 that supports the packaging material film b wound in a roll shape, a guide roller 72, and a preheater 73 for preheating the fed packaging material film b. The packaging material film b is fed out to the magnetic force transfer portion 13b, is attached to the protrusion 43 of the rotating structure (C) 41, and rotates clockwise while being preheated.
[0051]
A predetermined amount of the heating agent 2 is supplied from the hopper 51 to the concave portion 22 of the rotating structure (A) 21 via the rotary valve 52 and is held in the concave portion 22 by the magnetic attraction force of the magnet portion 24. The surface of the heat generating agent 2 held in the concave portion 22 is prepared by a scraper 27.
[0052]
The exothermic agent 2 prepared by the scraper 27 is conveyed to the magnetic shielding curved plate 25 while being held by the magnet portion 24 of the rotating structure (A) 21. By being shielded, the action of the magnetic attractive force on the heat generating agent 2 is reduced. Here, since the magnetic attractive force of the magnet portion 34 of the rotating structure (B) 31 facing the shielded magnet portion 24 acts on the heating agent 2 that has reached the magnetic shielding curved plate 25, the heating agent 2 It moves to and is placed on the surface of the packaging material film a on the magnet part 34, and is held in a desired shape by the magnet part 34. The packaging film a on which the heat generating agent 2 held by the magnet unit 34 is placed is conveyed to the magnetic force transfer unit 13b while the portion corresponding to the sealing surface is cleaned by the vacuum cleaning roller 36.
[0053]
When the heat generating agent 2 reaches the magnetic transfer portion 13b, it is moved and placed on the packaging material film b by the magnetic force of the magnet portion 44 of the rotating structure (C) 41 and the tension of the packaging material film a, and is held in a desired shape. At the same time, it is sandwiched between the packaging films a and b. The exothermic agent 2 is held in a desired shape by the magnet portion 44.
[0054]
Thus, the packaging films a and b sandwiching the heat generating agent 2 are conveyed to the seal portion 14 and sealed by the seal die roll 8 to form the heat generating sheet 12.
[0055]
Thereafter, the heating element sheet 12 is cut at the sealing portion of the heating element sheet by the cut roller 9 disposed adjacent to the rotating structure (C) 41 to form the separated heating element 1.
[0056]
【The invention's effect】
According to the method of the present invention, since the magnet parts adjacent in the circumferential direction in the rotating structure (B) are arranged so as to face each other with the same magnetic pole, to the place other than the magnet part in the rotating structure (B). The magnetic powder-containing composition is prevented from adhering and stable magnetic transfer is possible.
In addition, according to the method of the present invention, biting of the sealing portion of the package due to the adhesion of the magnetic powder-containing composition is prevented, and defective products due to this biting are drastically reduced to efficiently produce the package. be able to.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing one embodiment according to a method for manufacturing a package of the present invention.
2 is a perspective view of a magnet unit shown in FIGS. 1 and 5. FIG.
3 is a partially enlarged view showing an example of an arrangement of magnet portions in FIG. 1. FIG.
FIG. 4 is a partially enlarged view showing an arrangement of magnet portions in a comparative example.
FIG. 5 is a schematic cross-sectional view showing another embodiment according to the method for manufacturing a package of the present invention.
[Explanation of symbols]
1 Heating element
2 Exothermic agent
4 Magnetic transfer device
6 Packaging material film a feeding device
7 Packaging material b feeding device
10 Magnet
11 York
12 Heating element sheet
13 Magnetic transfer section
13a Magnetic transfer section
13b Magnetic transfer section
21 Rotating structure (A)
24 Magnet part
25 Magnetic shielding plate
31 Rotating structure (B)
34 Magnet part

Claims

A rotating structure (A) in which a plurality of magnet parts are arranged and the magnetic powder-containing composition is held in these magnet parts, and a plurality of magnet parts are arranged adjacent to the rotating structure (A). Using the rotating structure (B), the magnetic powder-containing composition held in the magnet part of the rotating structure (A) is continuously applied to the magnet part of the rotating structure (B) facing the magnet part. A magnetic transfer method, wherein the magnet parts adjacent in the circumferential direction of the rotating structure (B) are arranged so as to face each other with the same magnetic pole when transferring the magnetic force.

The magnetic transfer method according to claim 1, wherein the magnetic force of the magnet portion of the rotating structure (A) is reduced, eliminated, or shielded during magnetic transfer.

3. The magnetic transfer method according to claim 1, wherein magnet parts adjacent in the circumferential direction in the rotating structure (A) are arranged so as to face each other with the same magnetic pole.

The rotating structure so that the magnetic poles at both ends of the magnet portion of the rotating structure (A) are the same as the magnetic poles at both ends of the magnet portion of the rotating structure (B) facing the magnetic force transfer. The magnetic transfer method according to claim 3, wherein (A) and the rotating structure (B) are rotated.

A rotating structure (A) in which a plurality of magnet parts are arranged and the magnetic powder-containing composition is held in these magnet parts, and a rotating structure (A) are disposed adjacent to each other, and the plurality of magnet parts are arranged. And using the rotating structure (B) in which the packaging material (a) is disposed on these magnet parts, the magnetic powder-containing composition is packaged through the following steps (1) and (2) in order. In the method for producing a packaged body that is housed in a bag comprising (a) and (b), the magnetic parts adjacent in the circumferential direction in the rotating structure (B) are the same when performing magnetic force transfer in step (1). A method of manufacturing a package, wherein the packages are arranged so as to face each other with magnetic poles.
Step (1) : A packaging material (a) in which the magnetic powder-containing composition held in the magnet part of the rotating structure (A) is placed on the magnet part of the rotating structure (B) facing the magnet part. ) Process step (2) of continuously transferring magnetic force on the surface and placing it: Holding the magnetic powder-containing composition placed on the surface of the packaging material (a) with the magnet part of the rotating structure (B) Covering with packaging material (b) and sealing both packaging materials

The method for manufacturing a package according to claim 5, wherein the magnetic force of the magnet portion of the rotating structure (A) is reduced, eliminated, or shielded during magnetic transfer.

The method for manufacturing a package according to claim 5 or 6, wherein magnet parts adjacent in the circumferential direction in the rotating structure (A) are arranged so as to face each other with the same magnetic pole.

The rotating structure so that the magnetic poles at both ends of the magnet portion of the rotating structure (A) are the same as the magnetic poles at both ends of the magnet portion of the rotating structure (B) facing the magnetic force transfer. The method for manufacturing a package according to claim 7, wherein (A) and the rotating structure (B) are rotated.

A rotating structure (A) in which a plurality of magnet parts are arranged and the magnetic powder-containing composition is held in these magnet parts, and a rotating structure (A) are disposed adjacent to each other, and the plurality of magnet parts are arranged. And a rotating structure (B) in which the packaging material (a) is disposed on the magnet parts, and a rotating structure (B) disposed adjacent to the magnet parts. Using the rotating structure (C) on which the packaging material (b) is disposed, the magnetic powder-containing composition is applied to the packaging material (a) through the following steps (1) , (2) and (3) in order. And in the method of manufacturing the package body accommodated in the bag which consists of (b), in carrying out magnetic force transfer in process (1) and (2) , in rotation structure (B) and rotation structure (C), respectively. A package body characterized in that magnet parts adjacent in the circumferential direction are arranged to face each other with the same magnetic pole. Method.
Step (1) : A packaging material (a) in which the magnetic powder-containing composition held in the magnet part of the rotating structure (A) is placed on the magnet part of the rotating structure (B) facing the magnet part. ) Process step (2) of continuously transferring magnetic force on the surface and placing it: (2) Packaging material (a) The magnetic powder-containing composition placed on the surface faces the magnet part of the rotating structure (B). While continuously transferring magnetic force on the surface of the packaging material (b) disposed on the magnet part of the rotating structure (C) and placing the magnetic powder-containing composition on the packaging material (a) and the packaging material (b Step (3) : The step of sealing the packaging material (a) and the packaging material (b) sandwiching the magnetic powder-containing composition.

The method for manufacturing a package according to claim 9, wherein magnet portions adjacent in the circumferential direction in the rotating structure (A) are arranged so as to face each other with the same magnetic pole.

The rotating structure so that the magnetic poles at both ends of the magnet portion of the rotating structure (A) are the same as the magnetic poles at both ends of the magnet portion of the rotating structure (B) facing the magnetic force transfer. The method for manufacturing a package according to claim 10, wherein (A) and the rotating structure (B) are rotated.

The rotating structure so that the magnetic poles at both ends of the magnet portion of the rotating structure (B) are the same as the magnetic poles at both ends of the magnet portion of the rotating structure (C) facing the magnetic force transfer. The method for manufacturing a package according to claim 11, wherein (B) and the rotating structure (C) are rotated.