| 摘要 |
Yarn, which when incorporated into fabrics e.g. carpets, is intended to reduce pilling and fuzzing, is spun from a blend of crimped synthetic staple fibres, one component (constituting 25-90% by weight of the blend) consisting of low-denier, low-toughness, long polyamide fibres and the other of high-denier, high-toughness, short fibres. The respective fibres may have 8-22 and 6-12 crimps per inch, denier 8-15 and 20-40, staple lengths at least three inches and not more than two inches. "loop-toughness" (see U.S.A. Specification 3,050,822) of 2-27 and at least 50, and the longer fibres may comprise frequently spaced weak spots e.g. at least one per inch, along their length. All or some fibres may contain small internal voids and the short fibres may contain 2-20% by weight of a poly (alkyl ether) in order to render the yarns and fabrics resistant to soiling and the accumulation of static changes. The fibres may be initially mixed e.g. manually, and a complete and intimate blend allowed to occur when the fibres are subsequently processed into yarn. Long and short fibres may be of a polyamide e.g. polyhexamethylene adipamide, sebacamide or isophthalamide or polycaproamide, or interpolyamides or melt blends of two or more thereof: alternatively, the short fibres may be other synthetic fibres e.g. of polyesters such as polyethylene terephthalate, polyvinyls such as polyacrylonitrile, or polyolefins such as polyethylene and polypropylene. The blend may include (less than 50%) components of other fibres e.g. long, low-denier, high-toughness fibres, wool or polyethylene fibres. |
