| 摘要 |
Use of high-contraction-polyester-yarn(contractibility = 6070%) as a core (A) and low-contraction-polyester-yarn(contractibility=below 5%) as an effect(B) is to produce polyester textured yarn. Supercharging degree of yarn is (A):(B)= from +6 to +10% : from +16 to +30%, while lowcharging degree of core and effect yarn is from -4 to -8%. The pressure of jet air to core-effect yarn is 7-9kg/cm2. Flexibility and heat-insulation are improved by contraction of multiple yarn.
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