Ultrafine sheath-core composite fibers and composite sheets made

Details Ultrafine sheath-core composite fibers and composite sheets made Ultrafine sheath-core composite fibers and composite sheets made

1985-08-23

1986-08-05

Bell, James J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Noninterengaged fiber-containing paper-free web or sheet...

428254, 428260, 428297, 428303, 428373, 4284231, 428904, B32B 2700

Patent

active

046043209

ABSTRACT:
Improved ultrafine sheath-core composite fibers and composite sheets composed of these fibers are disclosed. The composite fibers have a fineness of 0.0001 to 0.5 denier and comprises 10 to 70% of the core having a very high intrinsic viscosity within a specific range and being located at the center of the sheath and 90 to 30% of the sheath composed of a polyester copolymerized 1.5 to 8 mole %, based on the total acid component, of 5-sodium (or lithium or potassium) sulfoisophthalate and having a thickness of 0.04 to 2 microns. The composite fibers have a high strength and are dyeable with a cationic dye. When the composite fibers are combined with an elastic material such as polyurethane, suede-like artificial leathers having excellent softness, touch, feel and color can be obtained.

REFERENCES:
patent: 4008344 (1977-02-01), Okamoto et al.
patent: 4059949 (1977-11-01), Lee
patent: 4073988 (1978-02-01), Nishida et al.
patent: 4350006 (1982-09-01), Okamoto et al.
patent: 4381335 (1983-04-01), Okamoto
patent: 4468434 (1984-08-01), Sekimoto et al.

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