摘要:
Fibers that exhibit good elasticity or extensibility and tenacity, and low modulus are prepared from propylene-based copolymers. The propylene-based copolymers comprise at least about 50 weight percent (wt %) of units derived from propylene and at least about 8 wt % of units derived from one or more comonomers other than propylene, e.g., ethylene. Particularly preferred propylene copolymers are characterized as having 13C NMR peaks corresponding to a regio-error at about 14.6 and about 15.7 ppm, the peaks of about equal intensity. In one aspect of the invention, fibers are subjected to stress-induced crystallization by subjecting the fiber to tensile elongation during draw.
摘要翻译:表现出良好的弹性,伸长性和韧性以及低模量的纤维由丙烯基共聚物制备。 基于丙烯的共聚物包含至少约50重量%(wt%)衍生自丙烯的单元和至少约8重量%的衍生自除丙烯以外的一种或多种共聚单体的单元,例如乙烯。 特别优选的丙烯共聚物的特征在于具有对应于约14.6和约15.7ppm的区域误差的大约相同强度的峰的13 C NMR峰。 在本发明的一个方面,纤维在拉伸过程中经受纤维的拉伸伸长而受到应力诱导的结晶。
摘要:
Fibers that exhibit good elasticity or extensibility and tenacity, and low modulus are prepared from propylene-based copolymers. The propylene-based copolymers comprise at least about 50 weight percent (wt %) of units derived from propylene and at least about 8 wt % of units derived from one or more comonomers other than propylene, e.g., ethylene. Particularly preferred propylene copolymers are characterized as having 13C NMR peaks corresponding to a regio-error at about 14.6 and about 15.7 ppm, the peaks of about equal intensity. In one aspect of the invention, fibers are subjected to stress-induced crystallization by subjecting the fiber to tensile elongation during draw.
摘要翻译:表现出良好的弹性,伸长性和韧性以及低模量的纤维由丙烯基共聚物制备。 基于丙烯的共聚物包含至少约50重量%(wt%)衍生自丙烯的单元和至少约8重量%的衍生自除丙烯以外的一种或多种共聚单体的单元,例如乙烯。 特别优选的丙烯共聚物的特征在于具有对应于约14.6和约15.7ppm的区域误差的大约相同强度的峰的13 C NMR峰。 在本发明的一个方面,纤维在拉伸过程中经受纤维的拉伸伸长而受到应力诱导的结晶。
摘要:
Extensible bicomponent fibers and webs particularly adapted for disposable personal care product component applications. Sheath/core configurations providing desirable feel properties for elastic embodiments when compared with conventional elastic fibers and webs are obtained with specific olefin polymer combinations and sheath configurations.
摘要:
Extensible bicomponent fibers and webs particularly adapted for disposable personal care product component applications. Sheath/core configurations providing desirable feel properties for elastic embodiments when compared with conventional elastic fibers and webs are obtained with specific olefin polymer combinations and sheath configurations.