| 摘要 |
A melt-spun yarn has uniformly dispersed throughout its structure a small proportion, e.g. about 0.25% to 2.5% by weight, of a non-cyclic polyhydric alcohol having in the molecule 2 to 6 hydroxyl radicals and 2 to 12 carbon atoms. The polyhydric alcohol may be glycerol; ethylene glycol; 1,2-propanediol, hexamethylene glycol; 1,2,3-butanetriol, dipropylene glycol, triethylene glycol or sorbitol. The polyhydric alcohol may be dispersed in a molten nylon prior to melt spinning the nylon or may be introduced into nylon forming material before, during or after polycondensation. The relative viscosity of the nylon containing the polyhydric alcohol is at least 35 (determined at 25 DEG C. using a solution of the nylon of 11% concentration in 90% by weight formic acid). The yarns may be used for producing tyre cords. Conventional stabilizers and plasticizers may be included.
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