Fibers and filters containing said fibers
AssigneeAllied-Signal Inc.
InventorsTheodore Largman, Frank Mares, Clarke A. Rodman
Life of this patent
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Abstract
This invention relates to a fiber comprising a major amount of a continuous phase comprising one or more melt processible polyesters of fiber forming molecular weight, and a minor amount of one or more polyolefins non-uniformly dispersed in said continuous phase such that the concentration of polyolefins at or near the surface of said fiber is greater than the concentration of polyesters at or near the surface of said fiber, and a process for preparing said fiber.
Claims31
A fiber comprising a continuous phase of one or more melt processible polyesters of fiber forming molecular weight and one or more melt processible polyolefins selected from the group consisting of polypropylene, polybutylene and polyisobutylene non-uniformly dispersed therein, wherein the weight percent of polyolefin within 50 .ANG. of the surface of said fiber is at least about 50 weight percent based on the total weight of said fiber within said about 50 .ANG. of the surface of the fiber.
A fiber which comprises a major amount of a continuous phase comprising one or more melt processible polyesters of fiber forming molecular weight and a minor amount of one or more melt processible polyolefins non-uniformly dispersed in said continuous phase such that the concentration of said polyolefins within at least 50 .ANG. of the surface of said fiber is greater than the concentration of said polyesters within at least 50 .ANG. of the surface of said fiber, wherein said fiber is multi-lobal having at least 4 irregular or regular shaped lobes or vanes projecting from the longitudinal axis of said fiber.
Dependencies are inferred from the claim text.