Patent ID: 9732452
Date: 2017-08-15
CPC Classifications: D04B,D10B

Claim:
1. A stretchable knitted fabric comprising a non-elastic yarn and an elastic yarn, wherein the instantaneous heat generation temperature when stretched by 100% in at least one of warp and weft directions of the knitted fabric is 1.0° C. or more, the elastic yarn is contained in an amount of 40 g/m Measurement of power of knitted fabric stretched by 95%: the knitted fabric in the state of being stretched by 30% of the initial length is set on a Tensilon tensile tester and assuming that the stress value here is 0, the stress value (N) when further stretched by 50% based on the lenth at the setting (stretched by 95% in all of the initial length of the knitted fabric) is measured and taken as the power of knitted fabric stretched by 95%, the ratio (Lb/La) between the length La obtained by adding the length of sinker loop of the elastic yarn and the length of needle loop of the non-elastic yarn in one unit of the knit structure when the knitted fabric is stretched by 30% in both wrap and weft directions, and the length Lb obtained by adding the length of sinker loop of the elastic yarn and the length of needle loop of the non-elastic yarn in one unit of the knit structure when the knitted fabric is further stretched in either one of warp and weft directions to 50% stretch satisfies the following formula (1): the elongation degree of knitted fabric in the direction causing stretch-heat generation is from 70 to 200% and the sum of warp and weft elongation degrees of the knitted fabric is from 170 to 450%, under load of 9.8 N.