JP2016068391A - 成形用包装材 - Google Patents
成形用包装材 Download PDFInfo
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- JP2016068391A JP2016068391A JP2014200099A JP2014200099A JP2016068391A JP 2016068391 A JP2016068391 A JP 2016068391A JP 2014200099 A JP2014200099 A JP 2014200099A JP 2014200099 A JP2014200099 A JP 2014200099A JP 2016068391 A JP2016068391 A JP 2016068391A
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Abstract
【解決手段】成形用包装材1は、耐熱性樹脂からなる外側基材層13と、熱可塑性樹脂からなる内側シーラント層16と、前記外側基材層13と前記内側シーラント層16との間に配設された金属箔層11と、前記外側基材層13の金属箔層11側とは反対の側に形成された保護コート層14とを有し、前記保護コート層14が、フェノキシ樹脂およびウレタン樹脂を含む主剤樹脂と、硬化剤とを含む樹脂組成物からなり、厚みが0.1〜10μmである。
【選択図】 図1
Description
前記保護コート層が、フェノキシ樹脂およびウレタン樹脂を含む主剤樹脂と、硬化剤とを含む樹脂組成物からなり、厚みが0.1〜10μmであることを特徴とする成形用包装材。
図1に、本発明にかかる成形用包装材(1)の一実施形態を示す。この成形用包装材(1)は、リチウムイオン2次電池ケース用包装材として用いられるものである。即ち、前記成形用包装材(1)は、深絞り成形や張り出し成形等の成形に供されて2次電池ケースとして用いられるものである。
前記外側基材層(13)は耐熱性樹脂からなり、樹脂の種類は特に限定されるものではないが、例えば、ポリアミドフィルム、ポリエステルフィルム等が挙げられ、これらの延伸フィルムが好ましく用いられる。これらのなかでも、成形性および強度の点で、二軸延伸ポリアミドフィルム、二軸延伸ポリブチレンテレフタレート(PBT)フィルム、二軸延伸ポリエチレンテレフタレート(PET)フィルムまたは二軸延伸ポリエチレンナフタレート(PEN)フィルムを用いるのが特に好ましい。前記ポリアミドフィルムとしては、特に限定されるものではないが、例えば、6−ポリアミドフィルム、6,6−ポリアミドフィルム、MXDポリアミドフィルム等が挙げられる。なお、前記外側基材層(13)は、単層で形成されていても良いし、あるいは、例えばPETフィルム/ポリアミドフィルムからなる複層で形成されていても良い。
前記内側シーラント層(16)は熱可塑性樹脂からなり、リチウムイオン二次電池等で用いられる腐食性の強い電解液などに対しても優れた耐薬品性を具備するとともに、包材にヒートシール性を付与する役割を担うものである。
前記金属箔層(11)は、成形用包装材(1)に酸素や水分の侵入を阻止するガスバリア性を付与する役割を担うものである。
1)リン酸と、クロム酸と、フッ化物の金属塩およびフッ化物の非金属塩のうちの少なくとも一方と、の混合物
2)リン酸と、アクリル系樹脂、キトサン誘導体樹脂およびフェノール系樹脂のうちのいずれかと、クロム酸およびクロム(III)塩のうちの少なくとも一方と、の混合物
3)リン酸と、アクリル系樹脂、キトサン誘導体樹脂、フェノール系樹脂のうちのいずれかと、クロム酸およびクロム(III)塩のうちの少なくとも一方と、フッ化物の金属塩およびフッ化物の非金属塩のうちの少なくとも一方と、の混合物
前記外側接着剤層(12)は、金属箔層(11)と外側基材層(13)との接合を担う層である。
前記内側接着剤層(15)は、金属箔層(11)と内側シーラント層(16)との接合を担う層である。
前記保護コート層(14)は外側基材層(13)の外面に形成され、成形用包装材(1)の表面に良好な滑り性を付与して成形性を向上させるとともに、優れた耐薬品性、耐溶剤性、耐クラッチ性を付与する層である。
上述した各層を有する成形用包装材(1)は、金属箔層(11)の一方の面に外側接着剤層(12)を介して外側基材層(13)を貼り合わせ、他方の面に内側接着剤層(15)を介して内側シーラント層(16)を貼り合わせて五層の積層体(10)を作製し、この積層体(10)の外側基材層(13)の表面にペースト状に調製した保護コート層(14)用の樹脂組成物を塗布して乾燥させることにより作製することができる。
本発明の成形用包装材(1)を成形(深絞り成形、張り出し成形等)することにより、電池ケース等の成形ケースを得ることができる。
〈実施例1〜10〉
図1に示した積層構造の成形用包装材(1)を作製した。実施例1〜10は保護コート層(14)を構成する樹脂組成物または厚みのみが異なり、保護コート層(14)を除いた積層体(10)の材料および作製工程は各実施例で共通である。前記積層体(10)の材料および作製は以下のとおりである。
金属箔層(11)は厚さ40μmのアルミニウム箔であり、このアルミニウム箔の両面に、ポリアクリル酸、三価クロム化合物、水、アルコールからなる化成処理液を塗布し、180℃で乾燥を行って化成皮膜を形成した。この化成皮膜によるクロム付着量は10mg/m2である。
実施例1〜10で用いた五層構造の積層体(10)を成形用包装材とした。即ち、比較例1の成形用包装材は保護コート層(14)を有さない。
外側基材層として厚さ12μmのPETフィルムと厚さ15μmの二軸延伸6ポリアミドフィルムを積層した複層フィルムを用いたことを以外は、実施例1〜10と同じ方法で積層体を作製し、これを成形用包装材とした。比較例2の成形用包装材の六層構造の積層体であり、最外層はPETフィルムである。
保護コート層(14)の樹脂組成物の樹脂成分としてウレタン樹脂のみを使用したこと以外は、実施例1〜10と同じ方法で五層構造の積層体(10)に保護コート層を形成した。即ち、樹脂組成物はウレタン樹脂100質量部に対して、TDIとHDIを1:1で混合した硬化剤15質量部を配合して調製した。
保護コート層(14)の厚さを表1に示す厚さとしたこと以外は、実施例6と同じ方法で成形用包装材を作製した。
株式会社アマダ製の張り出し成形機(品番:TP−25C−X2)を用いて成形用包装材に対して縦55mm×横35mmの張り出し成形を行った。成形深さは成形品のコーナーR部にピンホールまたは割れが発生するまで行い、割れが発生しない成形限界値に応じ下記の基準で成形性を評価した。
「○」…成形限界値が7.5mm以上
「△」…成形限界値が7.5mm未満
耐薬品性および耐溶剤性の評価として、成形用包装材の最外層に、エチレンカーボネートとジエチレンカーボネートを1:1の容量比で混合した混合溶媒に対して六フッ化リンリチウム塩を1モル/Lの濃度となるように溶解せしめた溶液からなる電解液を滴下し、常温で24時間放置した後にエタノールで電解液を拭き取った。電解液拭き取り後の変色の程度により、下記の基準で評価した。
「○」…変色なし
「△」…薄く変色するが、目立たない
「×」…変色する
100mm×100mmに裁断した成形用包装材をフラットな台に置いたとき、
「○」…カールがありその高さが10mm以下、またはカールが全くない
「△」…10mmを超えるカールがある
2枚の成形用包装材を内側シーラント層同士が接触する態様で重ね合わせ、210℃に加熱した一対のシールバーで挟みつけて5秒保持し、内側シーラント層を熱融着させた。このとき、外層の樹脂がシールバーに貼り付くかどうかを下記の基準で評価した。
「○」…シールバーに外層が付着せず、上昇するシールバーで成形用包装材が持ち上がることがない。
「△」…シールバーに外層が軽く付着するが、上昇するシールバーで成形用包装材が持ち上がることがない。
「×」…シールバーに外層が付着し、上昇するシールバーで成形用包装材が持ち上がる
100mm×200mmに裁断した成形用包装材をフラットな台上に外層面を上に向けて置き、外層面上で、先端直径が10mmの平らな面を有する荷重450gの鉄製の治具を20往復(往復長さ100mm)させた。その後の成形用包装材の表面を目視で観察し、傷が付くかどうかを下記基準で評価した。
「○」…傷が付かない。
「△」…薄く傷が付くが、目立たない。
「×」…傷が付く。
11…金属箔層
12…外側接着剤層
13…外側基材層
14…保護コート層
15…内側接着剤層
16…内側シーラント層
Claims (6)
- 耐熱性樹脂からなる外側基材層と、熱可塑性樹脂からなる内側シーラント層と、前記外側基材層と前記内側シーラント層との間に配設された金属箔層と、前記外側基材層の金属箔層側とは反対の側に形成された保護コート層とを有し、
前記保護コート層が、フェノキシ樹脂およびウレタン樹脂を含む主剤樹脂と、硬化剤とを含む樹脂組成物からなり、厚みが0.1〜10μmであることを特徴とする成形用包装材。 - 前記主剤樹脂におけるフェノキシ樹脂とウレタン樹脂との質量比がフェノキシ樹脂1に対してウレタン樹脂0.6〜1.6である請求項1に記載の成形用包装材。
- 前記外側基材層がポリアミド樹脂からなる請求項1または2に記載の成形用包装材。
- 前記金属箔層の厚みが10〜40μmである請求項1〜3のうちのいずれか1項に記載の成形用包装材。
- 請求項1〜4のうちのいずれか1項に記載の成形用包装材を深絞り成形または張り出し成形してなることを特徴とする成形ケース。
- 電池ケースとして用いられる請求項5に記載の成形ケース。
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| JP2020038082A (ja) * | 2018-09-03 | 2020-03-12 | 昭和電工パッケージング株式会社 | アルミニウム製物品表面のコーティング状態の検査方法 |
| JP2020537291A (ja) * | 2018-08-29 | 2020-12-17 | エルジー・ケム・リミテッド | パウチ型二次電池及び二次電池用パウチ |
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| CN108075050A (zh) * | 2016-11-16 | 2018-05-25 | 宁德新能源科技有限公司 | 外包装防护涂层及其应用 |
| US10099463B1 (en) | 2017-04-10 | 2018-10-16 | L&P Property Management Company | Method of manufacturing a laminated soft good |
| JP6979847B2 (ja) * | 2017-10-16 | 2021-12-15 | 昭和電工パッケージング株式会社 | 蓄電デバイス用外装材及び蓄電デバイス |
| JP7340323B2 (ja) * | 2017-12-27 | 2023-09-07 | 株式会社レゾナック・パッケージング | 蓄電デバイス用外装材及び蓄電デバイス |
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| JP7053412B2 (ja) | 2018-09-03 | 2022-04-12 | 昭和電工パッケージング株式会社 | アルミニウム製物品表面のコーティング状態の検査方法 |
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| DE102015218736A1 (de) | 2016-04-14 |
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