| 摘要 |
Fibres are melt-spun from an intimate mixture of (a) a polyester or copolyester free from polyalkyleneoxy groupings wherein at least 95% of the structural units are terephthalate or 1,2-diphenoxyethane dicarboxylate units, (b) not more than 50% by weight of (a) + (b) of a polyamide or copolyamide, and (c) 5 to 15% by weight of (a) + (b) + (c) of a polyalkylene oxide. The polyamide should have a viscosity ratio as a 1% solution in 90% formic acid at 25 DEG C. of at least 1.4. The polyester and polyamide should not be allowed to react and terminal hydroxyls of the polyalkylene oxide should be blocked. The particle size of the polyamide should be such that it is present in the drawn fibre as fibrils of 0.1 to 5 micron diameter. The mixture may also include an antioxidant, e.g. 2,21-dihydroxy-3,31 - bis - (alphamethylcyclohexyl) - 5,51 -dimethyldiphenylmethane and a dispersing agent, e.g. a polydimethylsiloxane polyethylene oxide block copolymer or an alkylphenolethylene oxide condensate. In examples, fibres are spun from poly-(ethylene terephthalate), polyethylene oxide (M.W. 20,000) and one of the following polyamides: nylon 6,6; azelaic or adipic acid/hexamethylene diamine/N - (2 - aminoethyl) piperazine; adipic or sebacic acid/N-(2-aminoethyl) piperazine or N,N1-bis-(3-aminopropyl) piperazine; suberic acid/N-(2-aminoethyl) piperazine. The mixtures are melt-spun at temperatures ranging from 270 DEG to 286 DEG C. and drawn over a pin at 75 DEG to 90 DEG C. and a plate at 110 DEG to 185 DEG C. ratios of 3.5 to 5:1.
|
