Sheath/core composite materials

Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber

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428370, 428374, 428375, 428393, D02G 300

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active

052720055

ABSTRACT:
Rayon
ylon and other sheath/core composite fibers or other materials, with good adhesion between sheath and core resulting from an adhesion promoter. The adhesion promoter is difunctional and sterically hindered. Fumaric acid and terephthalic acid are preferred adhesion promoters for the composite fibers or other materials, because each compound has both difunctionality and steric hinderance, allowing either to form covalent bonds to both the sheath and the core. Fibers produced in accordance with this invention may be used to produce fabrics which have the strength and wrinkle resistance shown by a number of synthetic fibers, but with the water absorption characteristics of natural fibers such as cotton.

REFERENCES:
patent: 3824146 (1974-07-01), Ellis
patent: 4336297 (1982-06-01), Fushiki et al.
patent: 4483976 (1984-11-01), Yamamoto et al.
patent: 4559862 (1985-12-01), Case et al.
patent: 4596742 (1986-06-01), Selivansky et al.
patent: 4680156 (1987-07-01), Collier
patent: 4871791 (1989-10-01), Hammer et al.
patent: 5009954 (1991-04-01), Collier et al.
Collier et al., "Adhesion Promotion in Rayon/Nylon Skin/Core Bigeneric Fibers" 1993.
Southern et al, "Improved Sheath/Core Adhesion in Biconstituent Fibers via Interface Mixing," Textile Res. J., vol. 50, pp. 411-416 (1980).
Tao, "Interfacial Adhesion in Rayon/Nylon Sheath/Core Composite Fibers," PhD Dissertation, Louisiana State University (1991).

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