发明名称 |
Method of controlling width of polyester film support |
摘要 |
<p>A method for controlling the width of a polyester film support comprising, in order, the steps of: (a) extruding a polyester resin using one or more extruders; (b) casting the resin on a casting wheel to form a polyester sheet; (c) stretching the polyester sheet along the machine direction by ratios of 3 to 5 times at temperatures ranging from above the glass transition temperature to below the thermal crystallization temperature, wherein the machine contains extended edge rollers (14) in a machine direction orientation device( drafter) at the point where stretching occurs; (d) stretching the polyester sheet along the transverse direction by ratios of 3 to 5 times at temperatures ranging from above the glass transition temperature to below the thermal crystallization temperature; and (e) heat setting the polyester sheet at temperatures ranging from 180 to 250 C. A polyester film support is also disclosed. <IMAGE> <IMAGE> <IMAGE> <IMAGE></p> |
申请公布号 |
EP1220028(A1) |
申请公布日期 |
2002.07.03 |
申请号 |
EP20010205192 |
申请日期 |
2001.12.17 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
CHEN, WEN-LI A;CILANO, TIMOTHY F.;MAIER, LARRY K.;JOHNSON, JEFFREY P |
分类号 |
B29C55/02;B29C55/14;B29C55/20;C08J5/18;G03C1/795;(IPC1-7):G03C1/795 |
主分类号 |
B29C55/02 |
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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