JP7240825B2 - 成形用包装材及び成形ケース - Google Patents
成形用包装材及び成形ケース Download PDFInfo
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- JP7240825B2 JP7240825B2 JP2018118461A JP2018118461A JP7240825B2 JP 7240825 B2 JP7240825 B2 JP 7240825B2 JP 2018118461 A JP2018118461 A JP 2018118461A JP 2018118461 A JP2018118461 A JP 2018118461A JP 7240825 B2 JP7240825 B2 JP 7240825B2
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Description
前記外側層の外面に易接着層を介して保護層が積層一体化されていることを特徴とする成形用包装材。
X:浸漬処理前の延伸方向の寸法
Y:浸漬処理後の延伸方向の寸法。
1)リン酸、クロム酸及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、フッ化物金属塩及び非金属塩の混合物からなる水溶液
3)アクリル系樹脂又は/及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
のいずれかを塗工した後乾燥することにより化成処理を施す。
1)カーボンブラック、ジアミン、ポリオール、硬化剤及び有機溶媒を含有するインキ組成物
又は
2)主剤としてのポリエステル樹脂と硬化剤としての多官能イソシアネート化合物とによる二液硬化型ポリエステルウレタン樹脂バインダーと、無機顔料を含む着色顔料と、を含む着色インキ組成物
をグラビア印刷法等で前記耐熱性樹脂延伸フィルム層2の下面の第2易接着層12の表面に印刷する(塗布する)ことによって、形成することができる。前記有機溶媒としては、特に限定されるものではないが、例えば、トルエン、メチルエチルケトン、酢酸エチル、酢酸ノルマルプロピル等が挙げられる。
(接着剤組成物W)
水系ウレタン樹脂として三井化学株式会社製「タケラックW-6010」70質量部、水系エポキシ樹脂としてナガセケムテック株式会社製「デナコールEX-521」30質量部、ブロッキング防止剤として日産化学工業株式会社製のコロイダルシリカ「スノーテックスST-C」(平均粒径10nm~20nm)5質量部を混合し、さらにイオン交換水を加えて希釈して、不揮発分含有率が2質量%の接着剤組成物Wを得た。
(接着剤組成物V)
水系アクリル酸エステル樹脂として中央理化工業株式会社製「リカボンドSA-513」70質量部、水系エポキシ樹脂としてナガセケムテック株式会社製「デナコールEX-521」30質量部、ブロッキング防止剤として日産化学工業株式会社製のコロイダルシリカ「スノーテックスST-C」(平均粒径10nm~20nm)5質量部を混合し、さらにイオン交換水を加えて希釈して、不揮発分含有率が2質量%の接着剤組成物Vを得た。
(接着剤組成物Z)
水系エポキシ樹脂としてナガセケムテック株式会社製「デナコールEX-521」100質量部、ブロッキング防止剤として日産化学工業株式会社製のコロイダルシリカ「スノーテックスST-C」(平均粒径10nm~20nm)5質量部を混合し、さらにイオン交換水を加えて希釈して、不揮発分含有率が2質量%の接着剤組成物Zを得た。
平均粒子径0.8μmのカーボンブラック50質量部、エチレンジアミン5質量部、ポリエステル系ポリオール(数平均分子量:2500)45質量部を配合して、主剤を得た。前記主剤100質量部に対して硬化剤であるトリレンジイソシアネート(TDI)3質量部を配合し、さらにトルエンを50質量部配合して良く撹拌することによって、インキ組成物を得た。
厚さ15μm、熱水収縮率4.0%の二軸延伸6ナイロンフィルム(MD/TD=0.95)に代えて、同時2軸延伸法で延伸して得られた、厚さ15μm、熱水収縮率2.5%の二軸延伸6ナイロンフィルム(MD/TD=0.9)を用いた以外は、実施例1と同様にして、図1に示す成形用包装材1を得た。
厚さ15μm、熱水収縮率4.0%の二軸延伸6ナイロンフィルム(MD/TD=0.95)に代えて、同時2軸延伸法で延伸して得られた、厚さ15μm、熱水収縮率3.5%の二軸延伸6ナイロンフィルム(MD/TD=1.0)を用い、保護層20を形成する樹脂組成物として、ポリエステル樹脂20質量部、平均粒径が2μmの粉状シリカ3質量部、平均粒径が3μmのアクリル樹脂ビーズ5質量部、平均粒径が1μmの粉状硫酸バリウム5質量部、平均粒径が3μmのポリテトラフルオロエチレン(PTFE)ワックス1質量部、トルエン66質量部からなる樹脂組成物を用い、第2易接着層12を設けない構成とした(即ち二軸延伸ナイロンフィルム2の内面(コロナ処理済み)に直接に黒インキ層(着色インキ層)13を積層した)以外は、実施例1と同様にして、図1に示す成形用包装材1を得た。
厚さ15μm、熱水収縮率4.0%の二軸延伸6ナイロンフィルム(MD/TD=0.95)に代えて、同時2軸延伸法で延伸して得られた、厚さ15μm、熱水収縮率5.0%の二軸延伸6ナイロンフィルム(MD/TD=1.1)を用い、保護層20を形成する樹脂組成物として、ウレタン系樹脂20質量部、平均粒径が1μmの粉状アルミナ3質量部、平均粒径が3μmのアクリル樹脂ビーズ5質量部、平均粒径が1μmの粉状硫酸バリウム5質量部、平均粒径が3μmのポリテトラフルオロエチレン(PTFE)ワックス1質量部、トルエン66質量部からなる樹脂組成物を用いた以外は、実施例1と同様にして、図1に示す成形用包装材1を得た。
厚さ15μm、熱水収縮率4.0%の二軸延伸6ナイロンフィルム(MD/TD=0.95)に代えて、同時2軸延伸法で延伸して得られた、厚さ15μm、熱水収縮率2.0%の二軸延伸ポリエチレンテレフタレート(PET)フィルム(MD/TD=1.1)を用い、保護層20を形成する樹脂組成物として、ウレタン系樹脂20質量部、平均粒径が2μmの粉状の炭酸カルシウム3質量部、平均粒径が3μmのアクリル樹脂ビーズ5質量部、平均粒径が1μmの粉状硫酸バリウム5質量部、平均粒径が3μmのポリテトラフルオロエチレン(PTFE)ワックス1質量部、トルエン66質量部からなる樹脂組成物を用いた以外は、実施例1と同様にして、図1に示す成形用包装材1を得た。
接着剤組成物Wに代えて、接着剤組成物Vを用いて、第1易接着層11及び第2易接着層12を形成した以外は、実施例1と同様にして、図1に示す成形用包装材1を得た。
接着剤組成物Wに代えて、接着剤組成物Zを用いて、第1易接着層11及び第2易接着層12を形成した以外は、実施例1と同様にして、図1に示す成形用包装材1を得た。
厚さ15μm、熱水収縮率4.0%の二軸延伸6ナイロンフィルム(MD/TD=0.95)に代えて、同時2軸延伸法で延伸して得られた、厚さ15μm、熱水収縮率5.0%の二軸延伸ポリエチレンテレフタレート(PET)フィルム(MD/TD=1.1)を用い、保護層20を形成する樹脂組成物として、エポキシ系樹脂20質量部、平均粒径が2μmの粉状シリカ3質量部、平均粒径が3μmのアクリル樹脂ビーズ5質量部、平均粒径が1μmの粉状硫酸バリウム5質量部、平均粒径が3μmのポリテトラフルオロエチレン(PTFE)ワックス1質量部、トルエン66質量部からなる樹脂組成物を用いて、厚さ3μmの保護層20を形成した以外は、実施例7と同様にして、図1に示す成形用包装材1を得た。
厚さ15μm、熱水収縮率3.5%の二軸延伸6ナイロンフィルム(MD/TD=1.0)に代えて、厚さ15μm、熱水収縮率4.0%の二軸延伸6ナイロンフィルム(MD/TD=0.95)を用い、該二軸延伸6ナイロンフィルムの外面にコロナ処理は行わないものとすると共に、保護層20を形成する樹脂組成物として、ポリエステル樹脂20質量部、平均粒径が1μmの粉状アルミナ3質量部、平均粒径が3μmのアクリル樹脂ビーズ5質量部、平均粒径が1μmの粉状硫酸バリウム5質量部、平均粒径が3μmのポリテトラフルオロエチレン(PTFE)ワックス1質量部、トルエン66質量部からなる樹脂組成物を用いて、厚さ4μmの保護層20を形成した以外は、実施例3と同様にして、図1に示す成形用包装材1を得た。
第1易接着層11を設けない構成とした(即ち二軸延伸ナイロンフィルム2の外面(コロナ処理済み)に直接に保護層20を積層した)以外は、実施例2と同様にして、成形用包装材を得た。
第1易接着層11を設けない構成とした(即ち二軸延伸ナイロンフィルム2の外面(コロナ処理済み)に直接に保護層20を積層した)以外は、実施例3と同様にして、成形用包装材を得た。
テスター産業社製の学振法摩擦堅牢度試験機(荷重200gのアルミニウム治具付き)を用いて、前記アルミニウム治具に脱脂綿を巻き付けてエタノールを含浸せしめてなる評価用治具を成形用包装材の表面(保護層20の表面)において20回往復させて接触させた後、保護層の剥がれの有無やその程度を調べて、下記判定基準に基づいて耐エタノール性を評価した。
(判定基準)
「○」…保護層に剥がれが全く認められない
「△」…保護層の剥がれが僅かに認められるが、殆ど目立たない
「×」…保護層の剥がれが明瞭に認められた。
テスター産業社製の学振法摩擦堅牢度試験機(荷重200gのアルミニウム治具付き)を用いて、前記アルミニウム治具に脱脂綿を巻き付けてMEK(メチルエチルケトン)を含浸せしめてなる評価用治具を成形用包装材の表面(保護層20の表面)において20回往復させて接触させた後、保護層の剥がれの有無やその程度を調べて、下記判定基準に基づいて耐エタノール性を評価した。
(判定基準)
「○」…保護層に剥がれが全く認められない
「△」…保護層の剥がれが僅かに認められるが、殆ど目立たない
「×」…保護層の剥がれが明瞭に認められた。
成形用包装材を縦10cm×横10cmの大きさに切り出して試験片を得、該試験片を基板の上に粘着力の強い両面粘着テープで貼り付けて固定した。基板の上に固定した試験片の表面(保護層20の表面)にスリーエム社製の「Scotchテープ#600」(保護テープ)を2kgのローラーの荷重により貼り合わせた後、その直後に前記保護テープを勢いよく剥がして保護層の状態を観察するという「テープ剥離試験」を15回繰り返し行い、下記判定基準に基づいて耐テープ剥離性を評価した。
(判定基準)
「○」…テープ剥離試験を15回繰り返し行っても保護層に剥がれが全く認められない
「△」…テープ剥離試験を10回繰り返し行っても保護層に剥がれが全く認められないものの、11回目、12回目、13回目または14回目のテープ剥離試験において保護層に剥がれが認められた
「×」…テープ剥離試験を10回繰り返し行うまでの間に保護層が剥がれた。
成形深さフリーのストレート金型を用いて成形用包装材に対し下記成形条件で深絞り1段成形を行い、各成形深さ(6.0mm、5.5mm、5.0mm、4.5mm、4.0mm、3.5mm、3.0mm、2.5mm、2.0mm)毎に成形性を評価し、コーナー部にピンホールが全く発生しない良好な成形を行うことができる最大成形深さ(mm)を調べ、下記判定基準に基づいて成形性を評価した。なお、ピンホールの有無は、ピンホールを透過してくる透過光の有無を目視により観察することにより調べた。
(成形条件)
成形型…パンチ:33.3mm×53.9mm、ダイ:80mm×120mm、コーナーR:2mm、パンチR:1.3mm、ダイR:1mm
しわ押さえ圧…ゲージ圧:0.475MPa、実圧(計算値):0.7MPa
材質…SC(炭素鋼)材、パンチRのみクロムメッキ。
(判定基準)
「◎」…ピンホール及び割れが発生しない最大成形深さが5.5mm以上である(合格)
「○」…ピンホール及び割れが発生しない最大成形深さが4.5mm以上5.5mm未満である(合格)
「△」…ピンホール及び割れが発生しない最大成形深さが3.0mm以上4.5mm未満である(合格)
「×」…ピンホール及び割れが発生しない最大成形深さが3.0mm未満である。
2…耐熱性樹脂延伸フィルム層(外側層)
3…熱可塑性樹脂層(内側層)
4…金属箔層
10…成形ケース
11…第1易接着層
20…保護層
Claims (9)
- 外側層としての耐熱性樹脂延伸フィルム層と、内側層としての熱可塑性樹脂層と、これら両層間に配設された金属箔層と、を含む成形用包装材であって、
前記外側層の外面に第1易接着層を介して保護層が積層一体化され、
前記耐熱性樹脂延伸フィルム層および前記金属箔層間において前記耐熱性樹脂延伸フィルム層の内面に第2易接着層が積層され、その第2易接着層の内面に着色インキ層が積層され、その着色インキ層の内面に接着剤層が積層され、
前記第1易接着層および前記第2易接着層は、同一の接着剤組成物によって構成されていることを特徴とする成形用包装材。 - 前記第1易接着層および前記第2易接着層は、エポキシ樹脂、ウレタン樹脂、アクリル酸エステル樹脂、メタアクリル酸エステル樹脂及びポリエチレンイミン樹脂からなる群より選ばれる1種または2種以上の樹脂を含有してなる請求項1に記載の成形用包装材。
- 前記第1易接着層および前記第2易接着層は、ウレタン樹脂及びエポキシ樹脂を含有してなる請求項1に記載の成形用包装材。
- 前記第1易接着層および前記第2易接着層は、前記ウレタン樹脂/前記エポキシ樹脂の含有質量比が98/2~40/60の範囲である請求項3に記載の成形用包装材。
- 前記第1易接着層および前記第2易接着層は、アクリル酸エステル樹脂及びメタアクリル酸エステル樹脂からなる群より選ばれる1種または2種以上のアクリル樹脂と、エポキシ樹脂とを含有してなる請求項1に記載の成形用包装材。
- 前記第1易接着層および前記第2易接着層において、前記アクリル樹脂/前記エポキシ樹脂の含有質量比が98/2~40/60の範囲である請求項5に記載の成形用包装材。
- 前記第1易接着層および前記第2易接着層は、樹脂-水系エマルジョンが前記耐熱性樹脂延伸フィルム層に塗布されて形成された接着層である請求項1~6のいずれか1項に記載の成形用包装材。
- 前記保護層は、耐熱性樹脂中に無機微粒子が分散含有された樹脂組成物からなる層である請求項1~7のいずれか1項に記載の成形用包装材。
- 請求項1~8のいずれか1項に記載の成形用包装材の深絞り成形体または張り出し成形体からなる成形ケース。
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