STRAND LIKE ARTICLE AND ITS FORMATION

摘要

PURPOSE: To obtain microporous filaments and fibers having good wettability by specifying a hygroscopic filler and a plasticizer adding to an ultra-high- molecular-weight polyolefin and specifying their applying amount. CONSTITUTION: This strand article has = about 20% void volume and is obtained by forming filaments and fibers form a mixture consisting of (A) about 10-90 vol.% ultra-high-molecular-weight polyolefin (homopolymer or ethylene/propylene/butylene copolymer), (B) about 10-90 vol.% hygroscopic filler having about 0.01-10 m diameter and about 30-950 m2 /g, preferably about 100-500 m2 /g surface area and (C) about 1-15 vol.% plasticizer having about 7.3-8.4 solubility parameter.