| 摘要 |
<p>1,140,479. Composite polyamide filaments. KANEGAFUCHI BOSEKI K.K. and SNIA VISCOSA SOC. NAZIONALE INDUSTRIA APPLICAZIONI VISCOSA S.p.A. 6 Oct., 1967 [10 Oct., 1966], No. 45916/67. Heading B5B. Polyamide composite filaments having high crimpability and dyeability are formed by melting separately, and spinning simultaneously through a common spinneret orifice to obtain a unitary filament which is then drawn at room temperature, two different fibre-forming thermoplastic synthetic linear polymers, the two polymers being arranged and bonded eccentrically as distinct filamentary components along the length of the filament, one of the components being polycaproamide, and the other being a copolyamide obtained by subjecting a mixture of 0À01 to 5% by weight of a nylon salt consisting of a dicarboxylic acid and a polyfunctional diamine having the general formula H 2 N-(CH 2 ) n -R-(CH 2 ) n -NH 2 . wherein R is and n is 3 to 11, 3 to 20% by weight of another nylon salt, and 75 to 95% by weight of polycaproamide forming components, to polycondensation. Numerous examples of polyfunctional diamines and dicarboxylic acids which may be used to form the first nylon salt above are given. The second nylon salt above may be formed from the same dicarboxylic acids and aliphatic, aromatic or heterocyclic diamines other than the said polyfunctional diamines, a nylon salt consisting of an akylene diamine and isophthalic acid being preferred. Polycaproamide forming components mentioned are #-caprolactam and #- aminocaproic acid. The two components may suitably be bonded in a conjugate ratio ranging from 2: 8 to 8: 2, and may be bonded in side-byside relationship, or in sheath-core relationship.</p> |
