发明名称 |
METHODS OF MAKING THICK, HIGHLY ORIENTED, OPAQUE, LOW-DENSITY, MICROPOROUS POLYOLEFIN FILMS AND THE FILMS MADE THEREBY |
摘要 |
A method of making a polyolefin film in accordance with this invention includes the steps of: blending a propylene block copolymer with a beta nucleating agent; extruding a film layer from the blend and providing a tota l area draw ratio in excess of 20, where at least one part of the stretching occurs at < 120~C, for forming the film with a density no greater than 0.40g/cm~ and a thickness greater than 160 gauge. The film also constitutes a part of this invention.
|
申请公布号 |
CA2523949(A1) |
申请公布日期 |
2004.11.25 |
申请号 |
CA20042523949 |
申请日期 |
2004.04.28 |
申请人 |
APPLIED EXTRUSION TECHNOLOGIES, INC. |
发明人 |
LANDOLL, LEO M.;WIELOCH, KELAN. |
分类号 |
C08J5/18;B29C55/00;B29C55/12;B32B1/00;C08L23/16 |
主分类号 |
C08J5/18 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|