SCHOLL, Neil, T.,TOPOLKARAEV, Vasily, A.,CARRILLO OJEDA, Antonio J.,MCENEANY, Ryan, J.,TOWER, Theodore, T.
申请号：
WO2016US65725
公开号：
WO2017100511(A1)
申请日:
2016.12.09
申请国别(地区):
世界知识产权组织国际局
年份:
2017
代理人:
摘要：
A method for forming porous fibers is provided. The fibers are formed from a thermoplastic composition containing a continuous phase, which includes a matrix polymer, and a nanoinclusion additive that is at least partially incompatible with the matrix polymer so that it becomes dispersed within the continuous phase as discrete nano-scale phase domains. The method includes traversing a bundle of the fibers through a multi-stage drawing system that includes at least a first fluidic drawing stage and a second fluidic drawing stage. The first drawing stage employs a first fluidic medium having a first temperature and the second drawing stage employs a second fluidic medium having a second temperature. The first and second temperatures are both lower than the melting temperature of the matrix polymer, and the first temperature is greater than the second temperature.
