| 摘要 |
Normally "dry" or hydrophobic polymers, such as polyolefins, polyesters and the like are rendered more moisture absorptive to improve "breathability" by providing an adherent surface of a hydrophilic polymer. Composite fibers are obtained by stretching a laminated or coated structure of a hydrophobic polymer film and a hydrophilic polymer film, longitudinally dividing the stretched film into a plurality of strips and fibrillating the stretched strips. Alternatively, the film can first be subdivided into the plurality of longitudinal strips and then stretched and fibrillated. In the resulting shaped articles (e.g. fibers), a discontinuous, discrete, adherent covering of the hydrophilic polymer component is provided on a core or substrate composed of the hydrophobic polymer. For example, the moisture regain of high density polyethylene fibers can be increased to more than 1%.
|
