Process for producing a shaped article, such as fiber composed o

Details Process for producing a shaped article, such as fiber composed o Process for producing a shaped article, such as fiber composed o

1987-07-02

1989-03-21

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Forming continuous work followed by cutting

264129, 264171, 2642884, 264DIG47, 4251335, 425289, B29C 4706, B29C 5502, B29C 6552

Patent

active

048141313

ABSTRACT:
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%.

REFERENCES:
patent: 3323978 (1967-06-01), Rasmussen
patent: 3511742 (1970-05-01), Rasmussen
patent: 3539663 (1970-11-01), Pietrusza
patent: 3639573 (1972-02-01), Port
patent: 3695025 (1972-10-01), Gibbon
Encyclopedia of Polymer Science and Technology, vol. 9, New York, Interscience Publishers, a Div. of John Wiley & Sons, Inc., .COPYRGT.1968, pp. 181-184.

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