发明授权
- 专利标题: Shrink films and articles including the same
- 专利标题(中): 收缩电影和文章包括相同
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申请号: US359160申请日: 1994-12-19
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公开(公告)号: US5851610A公开(公告)日: 1998-12-22
- 发明人: William J. Ristey , George A. Senich , William J. Hill , Harry S. Anderson
- 申请人: William J. Ristey , George A. Senich , William J. Hill , Harry S. Anderson
- 申请人地址: MA Peabody
- 专利权人: Applied Extrusion Technologies, Inc.
- 当前专利权人: Applied Extrusion Technologies, Inc.
- 当前专利权人地址: MA Peabody
- 主分类号: B29C55/14
- IPC分类号: B29C55/14 ; B29C71/00 ; B32B27/06 ; B32B27/32 ; B32B31/14
摘要:
A shrink film comprising a biaxially oriented polymer film comprising polypropylene having a machine direction shrinkage and a transverse direction shrinkage that is less than or equal to 50% of the machine direction shrinkage, and wherein the machine direction shrinkage is greater than 15% and the transverse direction shrinkage is less than 10% at about 140.degree. C. The shrink film is formed by a process comprising subjecting a biaxially oriented polymer film to a treatment which comprises the heating the film to a temperature of about 100.degree. C. to 180.degree. C. The heated film is drawn under conditions to extend it by at least 1.05 times its original length in the machine direction. The drawn film is cooled under tension to produce a shrink film having the specified ratio between the machine direction shrinkage and the transverse direction shrinkage in addition to having a kinetic film-to-film coefficient of friction of about 0.05 to 0.40. The shrink film is suitable for wrapping contoured articles.
公开/授权文献
- US5153406A Microwave source 公开/授权日:1992-10-06