发明名称 |
Geformte Gebilde mit hohem Modul aus Polyethylen von mittlerem Molekulargewicht |
摘要 |
<p>Solutions of intermediate molecular weight polymers from about 200,000 to about 4,000,000, such as polyethylene, in a relatively non-volatile solvent are extruded through an aperature at constant concentration and thereafter stretched at a ratio of at least about 3:1 prior to cooling to form a first gel. The first gels are extracted with a volatile solvent to form a second gel, and the second gel is dried to form a low porosity xerogel. Stretching occurs with any one or more of the first gel, second gel or xerogel. The polyethylene products produced by our process include products having a molecular weight between about 200,000 and about 4,000,000 a tenacity of at least about 13 grams/denier, a modulus of at least about 350 gram/denier, a porosity of less than 10% by volume, a crystalline orientation function of at least about 0.95, and a main melting temperature of at least about 140 DEG C.</p> |
申请公布号 |
DE3588211(D1) |
申请公布日期 |
1999.05.20 |
申请号 |
DE19853588211 |
申请日期 |
1985.12.17 |
申请人 |
ALLIEDSIGNAL INC., MORRISTOWN, N.J., US |
发明人 |
KAVESH, SHELDON, MORRISTOWN, NEW JERSEY 07960, US;PREVORSEK, DUSAN CIRIL, MORRISTOWN, NEW JERSEY 07960, US |
分类号 |
B29C47/00;B29C55/00;B29K23/00;C08F8/00;C08F10/00;C08F10/02;C08J5/18;D01D5/00;D01F6/04;D07B1/02;(IPC1-7):D01F6/04 |
主分类号 |
B29C47/00 |
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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