久久婷婷国产麻豆91-av网站天堂-亚洲中文字幕无码永久在线-高潮久久久久久-久久av免费-国产精品99久久99久久久动漫-国产欧美另类精品久久久-青青草国产精品一区二区-每日av在线-在线视频99-午夜精品久久久久久久喷水-风间由美一区二区三区-99精品在线免费观看-4438激情网-农民人伦一区二区三区剧情简介-久久亚洲国产精品成人av秋霞-亚洲久热中文字幕在线-ww国产内射精品后入国产-未满小14洗澡无码视频网站-久久欧美国产伦子伦精品

The reason why elastic jeans have elasticity

2021-03-04 1538

Now we all love beauty and attach importance to the maintenance of body shape. Many people will choose some elastic clothes to highlight the curve when they have attractive body shape. Elastic jeans have always been the popular style of people.


In recent years, the fabrics of some casual clothes are elastic, comfortable and casual, and are very popular with young people.


Why do these fabrics have such remarkable elasticity?

彈力牛仔廠家

If you observe carefully, you will find that the elasticity of all elastic fabrics is horizontal, which is equivalent to the weft direction of the cloth surface, while there is no elasticity in the longitudinal direction.


The subtlety of this is that weft yarn uses a kind of yarn called elastic core-spun yarn. Elastic core-spun yarn is a special type of yarn. It uses about 4% - 8% spandex elastic yarn as the core, and about 90% cotton yarn is wrapped around the outside of the spandex yarn in a spring shape. Although the cotton yarn has no elasticity, when the spandex filament stretches, the cotton yarn stretches like a spring, so the fabric has elasticity in the transverse direction.


It can be seen that spandex plays a crucial role in this process. Among the elastic fabrics, spandex only accounts for about 5% of the total amount of all fibers and can have significant elasticity.

Now we understand why this fabric has such remarkable elasticity?

The article is from elastic denim manufacturerhttp://m.zhong-bao.cn/