Chisso Corporation

Naruaki Hane

Susumu Tomioka

Shozo Ejima

Tadao Matsumoto

Heat-adhesive side-by-side type composite fibers consisting of a component composed mainly of a crystalline polypropylene and a component composed mainly of an olefin polymer, having few naturally developed crimps and few latent crimpability and superiority in undetachability of the composite components, are produced by using two composite components having a specified relationship of melt flow ratio and by stretching unstretched composite fibers at a specified temperature range.

Heat-adhesive composite fibers and process for producing same

A porous non-woven fabric having a good dimensional stability and uniformity is prepared from a web obtained by arranging side-by-side composite fibers alone or a blend thereof with another fibrous material into a web and heat-treating the resulting web at a specified temperature, said composite fibers having few naturally developed crimps and being obtained by stretching unstretched side-by-side composite fibers consisting of a polypropylene component and an olefin polymer component having a specified melting point and a specified melt flow rate.

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Moriyamashi, Japan

Naruaki Hane