Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1994-10-13
1996-01-23
Lesmes, George F.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
428296, 428373, 428374, 428375, 428376, 428378, 428393, 428394, 428398, 428399, 428400, 428401, D02G 304
Patent
active
054864186
ABSTRACT:
By mixing a high-melting polyvinyl alcohol type polymer (A) and a low-melting water-soluble polymer (B) in a solvent for the polymer (A) to prepare a spinning solution and then subjecting the solution to low-temperature spinning so that the resulting filaments are solidified uniformly in the cross-sectional direction, there is formed a fiber of sea-islands structure comprising said high-melting polyvinyl alcohol type polymer (A) as the sea component and said low-melting water-soluble polymer (B) as the islands component. In this fiber, at least part of the islands component is present in a fiber zone ranging from the fiber surface to 2 .mu.m inside and the fiber surface contains substantially no islands component. This fiber ordinarily shows the performance of the matrix phase, i.e. the performance of a high-melting polyvinyl alcohol fiber; however, when the fiber is pressurized at high temperatures, the low-melting polymer (the islands component) is pushed out onto the fiber surface and there occurs heat bonding between fibers. Owing to this property of the fiber, a nonwoven fabric can be produced advantageously from the fiber.
REFERENCES:
patent: 4140668 (1979-02-01), Sumi et al.
patent: 5124194 (1992-06-01), Kawano
patent: 5208104 (1993-05-01), Ueda et al.
patent: 5238995 (1993-08-01), Fukunishi et al.
Abstract of JP-62028408, Norihisa et al., "Polyvinyl Alcohol Based Synthetic Fiber Having Solubility and Low Shrinkage", Feb. 6, 1987.
Abstract of JP-3213544, Yutaka et al., "Bulky Clothes-Wadding", Sep. 18, 1991.
Abstract of JP-59059919, Kimiyoshi et al., "Staple Fiber for Binder", Apr. 5, 1984.
Kobayashi Satoru
Naramura Syunpei
Ohmory Akio
Sano Tomoyuki
Satoh Masahiro
Choi Kathleen L.
Kuraray Co. Ltd.
Lesmes George F.
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