JP6166144B2 - 成形用包装材 - Google Patents
成形用包装材 Download PDFInfo
- Publication number
- JP6166144B2 JP6166144B2 JP2013214344A JP2013214344A JP6166144B2 JP 6166144 B2 JP6166144 B2 JP 6166144B2 JP 2013214344 A JP2013214344 A JP 2013214344A JP 2013214344 A JP2013214344 A JP 2013214344A JP 6166144 B2 JP6166144 B2 JP 6166144B2
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- JP
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- Prior art keywords
- layer
- resin
- packaging material
- mat coat
- molding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Images
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- Y10T428/00—Stock material or miscellaneous articles
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Description
前記マットコート層が、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、固体微粒子とを含む樹脂組成物からなる下層と、フッ素含有樹脂を含む樹脂組成物からなる上層とを備えた複層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ナイロンフィルム、6,6ナイロンフィルム、MXDナイロンフィルム等が挙げられる。なお、前記外側基材層(13)、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、クロム酸およびフッ化物の金属塩の混合物からなる水溶液
2)リン酸、クロム酸、フッ化物金属塩および非金属塩の混合物からなる水溶液
3)アクリル系樹脂または/およびフェノール系樹脂と、リン酸と、クロム酸と、フッ化物金属塩との混合物からなる水溶液
前記化成皮膜はクロム付着量として0.1〜50mg/m2であることが好ましく、特に2〜20mg/m2が好ましい。前記クロム付着量の化成皮膜によって高耐食性の成形用包装材となし得る。
前記外側接着剤層(12)は、金属箔層(11)と外側基材層(13)との接着を担う層である。
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)との接着を担う層である。
前記マットコート層(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、耐摩耗性、成形性を付与する層である。前記マットコート層(14)は、外側基材層(13)側の下層(14a)と表面側の上層(14b)とを含む複層構造である。
前記下層(14a)は樹脂成分と固体微粒子とを含む樹脂組成物からなる。
一方、マットコート層(14)の上層(14b)は、表面の滑り性を一層向上させて成形性を向上させ、さらに一層優れた耐電解液性、耐摩耗性を付与する層である。また、下層(14a)の固体微粒子による表面の凹凸を緩和して印字性を向上させる効果がある。
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5層の積層体(10)を作製し、この積層体(10)の外側基材層(13)の表面にマットコート層(14)の下層(14a)用のペースト状の樹脂組成物を塗布して乾燥させ、さらに上層(14b)用のペースト状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、成形ケース(電池ケース等)を得ることができる。
金属箔層(11)は厚さ35μm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。
マットコート層(14)の下層(14a)用に以下の樹脂組成物を準備した。
本例はマットコート層が固体微粒子を含む下層(14a)のみの単層からなる例である。
下層(14a)用に以下の樹脂組成物を準備した。
本例はマットコート層が固体微粒子を含む下層(14a)のみの単層からなる例であり、比較例1とは下層用の樹脂組成物の樹脂成分が異なる。
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×深さ8mmの直方体形状に張り出し成形を行い、成形品のコーナーR部におけるピンホールおよび割れを観察し、下記判定基準に基づいて成形性を評価した。
(判定基準)
「◎」…ピンホールが全くなく、割れも全く発生しなかった。
「○」…ピンホールは全くないが、マットコート層が僅かに白く濁った。
「△」…ピンホールがごく一部で僅かに発生したものの実質的に殆どなかった。
「×」…ピンホールと割れがコーナーR部に発生した。
マットコート層の面にインクジェットプリンターを用いて白インクでバーコードを印刷した。印刷したインクジェットのドットサイズは直径0.428mmであり、バーコード寸法は4.5mm×3.5mmである。このバーコードをバーコードリーダーで読み取り可能であるかどうか、また目視によりドットおよび線のにじみの有無を調べて評価した。
(判定基準)
「◎」…読み取り可能。にじみなし。
「○」…読み取り可能。僅かににじみあり。
「△」…読み取り可能。にじみあり。
「×」…読み取り不可能。にじみあり。
成形用包装材を10cm×10cmにカットして試験片とした。この試験片のマットコート層(14)に先端部の直径1cm、重さ1kgの分銅にサンドペーパー(粗さ:800)を巻き付けた摺動具で最大50往復擦り、外観の目視観察によって耐摩耗性を評価した。
(判定基準)
マット層がなくなって下地のナイロンの光沢が見えたときを変化ありとした。
「◎」…50往復させても外観に変化がなかった。
「○」…30往復で外観に変化があった。
「△」…10往復で外観に変化があった。
「×」…5往復で外観に変化があった。
成形用包装材を10cm×10cmにカットして試験片とした。この試験片のマットコート層に電解液1mlを滴下してから最大60分放置し、エタノール漬け綿棒で拭き、外観の目視観察によって耐電解液性を評価した。
(判定基準)
マット層がなくなって下地のナイロンの光沢が見えたときを変化ありとした。
「◎」…60分でも外観に変化がなかった。
「○」…30分で外観に変化があった。
「△」…20分で外観に変化があった。
「×」…10分で外観に変化があった。
11…金属箔層
12…外側接着剤層
13…外側基材層
14…マットコート層
14a…下層
14b…上層
15…内側接着剤層
16…内側シーラント層
Claims (10)
- 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マットコート層とを有し、
前記マットコート層が、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、固体微粒子とを含む樹脂組成物からなる下層と、フッ素含有樹脂を含む樹脂組成物からなる上層とを備えた複層であることを特徴とする成形用包装材。 - 前記マットコート層の上層を構成する樹脂組成物のフッ素含有樹脂は、主剤の骨格中にフッ素が付加された耐熱性樹脂を主成分として含む請求項1に記載の成形用包装材。
- 前記マットコート層の上層を構成する樹脂組成物のフッ素含有樹脂は、テトラフルオロオレフィンとカルボン酸ビニルエステルの共重合体からなる二液硬化型のフッ素樹脂を主成分として含む請求項1または2に記載の成形用包装材。
- 前記マットコート層の下層の厚さが2〜5μm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。
- 前記マットコート層の上層の厚さが0.2〜2μmである請求項1〜4のうちのいずれか1項に記載の成形用包装材。
- 前記マットコート層の下層を構成する樹脂組成物の主剤樹脂は、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の比率で配合されている請求項1〜5のうちのいずれか1項に記載の成形用包装材。
- 前記マットコート層の下層を構成する樹脂組成物の固体微粒子の平均粒径が1〜5μmである請求項1〜6のうちのいずれか1項に記載の成形用包装材。
- 前記マットコート層の下層を構成する樹脂組成物における固体微粒子の含有率が1〜50質量%である請求項1〜7のうちのいずれか1項に記載の成形用包装材。
- 請求項1〜8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9に記載の成形ケース。
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US14/511,285 US9553284B2 (en) | 2013-10-15 | 2014-10-10 | Molding material for package |
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KR101537399B1 (ko) | 2011-11-11 | 2015-07-16 | 다이니폰 인사츠 가부시키가이샤 | 전기화학 셀용 포장재료 |
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KR102225844B1 (ko) | 2021-03-09 |
TWI630102B (zh) | 2018-07-21 |
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