EXTENSIBLE AND CONTRACTILE STRUCTURE BODY MULTILAYERED EXTENDING AND CONTRACTING SHEET SPUN YARN AND FIBER STRUCTURE BODY

摘要

An object of the present invention is to provide an elastic structure having a high stress relaxation property, elasticity, and a feeling of compression by slowly returning after stretching, and having a feeling of fit. The above object is, in accordance with JIS K7127, after 150% elongation at a tensile speed of 200 mm/min, the tensile permanent set obtained after 10 minutes (PS _10M ) is 1% or more and 50% or less, and the tensile permanent set obtained after 10 minutes (PS _10M ) and the ratio of tensile permanent set (PS _1M ) obtained after 1 minute PS _1M / PS _10M is achieved by a stretchable structure of 1.10 or more.