double covered yarn - An Overview
Our spandex is first covered with fiber in the z-twist, after which you can covered once again having an s-twist. This ensures that no spandex arrives into immediate connection with the skin.(この画像の場合は、芯ゴムは、天然ゴム糸で、カバード糸は、上糸も下糸もポリエステル糸の生成色です。)ゴム紐