Melt fracture is reduced, without the necessity of polymer processing-aid additives specifically designed to alleviate exit region surface melt fracture phenomenon, by heating at least a portion of the die through which the polymer is extruded. The die exit region is maintained at a temperature above the bulk melt temperature of the polymer extruded through the die exit hole.
申请公布号
EP1670831(B1)
申请公布日期
2013.03.27
申请号
EP20040781834
申请日期
2004.08.20
申请人
EXXONMOBIL CHEMICAL PATENTS INC.
发明人
VEARIEL, THOMAS, R.;GOGOS, COSTAS, G.;QIAN, BAINIAN;TODD, DAVID, B.