发明名称 |
APPARATUS AND HIGH SPEED PROCESS FOR MAKING HIGHLY STRETCHEDFILM |
摘要 |
An apparatus and high speed process for heating and stretching a film having a bridle mechanism comprising a first heated roll and a second heated roll. The film is stretched as the film is transferred from the first heated roll to the second heated roll which rotates at a speed greater than the speed at which the fir st heated roll rotates. The film is fed into the bridle mechanism at a rate of about 1,500 fpm to about 2,500 fpm wherein it is stretched to a length that is up to about 450% greater than its initial, pre-stretched length. The increased contact between the large diameter heated rolls and the film and the short draw gap between the two heated roll s result in a highly stretched film having minimal neck-in. |
申请公布号 |
CA2319305(A1) |
申请公布日期 |
2001.04.28 |
申请号 |
CA20002319305 |
申请日期 |
2000.09.14 |
申请人 |
ILLINOIS TOOL WORKS INC. |
发明人 |
WOJCIK, JOHN P.;MEHTA, DEEPAK H.;VAN ERDEN, DONALD L. |
分类号 |
B29C55/06;(IPC1-7):B29C55/00;B29D7/00 |
主分类号 |
B29C55/06 |
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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