发明名称 |
Copolyester resin and polyester film for covering metal plates and laminated polyester film comprising same made into film |
摘要 |
Provided is a polyester resin having good film formability together with resisting film breakage (hair) and scraping (galling) in the drawing and ironing steps when applied to a polyester film for covering metal plates, and, as a film for the inner surfaces of metal cans, resisting corrosion of metal cans without damage to the film surface even if dropped or subjected to external shock (dented) after a product has been made by sealing contents inside a can . A copolyester resin characterized in including, as constituent units: 50-93 mass% of an ester oligomer (A) having a number-average molecular weight of 700 or lower, the ester oligomer (A) comprising a dicarboxylic acid unit (a1) containing 70 mol% or more of a terephthalic acid component and a diol unit (a2) containing 70 mol% or more of an ethylene glycol component; and 7-50 mass% of a polyester polyol (B) having a number-average molecular weight of 1500-3000, the polyester polyol (B) comprising a hydrogenated dimer acid unit (b1) and a 1,4-butanediol unit (b2). |
申请公布号 |
AU2013393427(A1) |
申请公布日期 |
2016.02.04 |
申请号 |
AU20130393427 |
申请日期 |
2013.07.05 |
申请人 |
BELL POLYESTER PRODUCTS, INC.;DAIWA CAN COMPANY |
发明人 |
KIMIDUKA, TAKASHI;TAKEUCHI, YUJI;MATSUMURA, JUNJI;OKIMOTO, MASAYA;KATSUMA, KEITA;TOMURA, HIDEAKI;NAKATSUKA, SADAMU |
分类号 |
C08G63/78;B32B15/09;B32B27/36 |
主分类号 |
C08G63/78 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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