发明名称 |
Method for producing doubly oriented polymers |
摘要 |
A process is disclosed for the solid phase preparation of doubly oriented synthetic polymeric material from an orientable amorphous but crystallizable or a semicrystalline thermoplastic polymeric workpiece comprising: (a) presenting the conditioned workpiece, at the entry mode of an opposing pair of solid rollers that are spaced apart a distance substantially less than the thickness of the workpiece; and (b) deforming the workpiece by compressive passage through the paired rollers at a nominal deformation ratios of at least 2 to 1. The deformation drawing is carried out between the glass transition temperature and the melting point of the polymeric material, by applying a draw tension insufficient to cause tensile failure of the workpiece.
|
申请公布号 |
US5171815(A) |
申请公布日期 |
1992.12.15 |
申请号 |
US19910705330 |
申请日期 |
1991.05.24 |
申请人 |
UNIVERSITY OF PITTSBURGH |
发明人 |
MAGILL, JOSEPH H.;SHANKERNARAYANAN, MANIVAKKAM J. |
分类号 |
B29C55/18;B29C55/28;B29C67/00 |
主分类号 |
B29C55/18 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|