A double-layer wrapped yarn and a production method therefor

Abstract

The invention provides a double-layer wrapped yarn and a production method therefor. The double-layer wrapped yarn comprises an inner core yarn layer and outer wrapping layers, wherein the inner core yarn layer is a staple fiber yarn with a weak twist; the outer wrapping layers include a first wrapping yarn and a second wrapping yarn, wherein the first wrapping yarn is wrapped around the outer side of the inner core yarn layer in a Z twist direction to obtain a single layer wrapped yarn, and the second wrapping yarn is wrapped around the outer side of the single layer wrapped yarn in an S twist direction. During spinning, a staple fiber rough yarn is feed to pass through an upper layer parallel spinning device to realize the wrapping of the first wrapping yarn, and thus the single layer wrapped yarn is obtained; then the single layer wrapped yarn passes through a lower layer parallel spinning device to realize the wrapping of the second wrapping yarn, so that the double-layer wrapped yarn is obtained. With the method, double wrapping of the inner core yarn layer can be realized and further the yarn forming quality is improved; the outer wrapping layers can be of different colors and materials, so that the appearance styles of the yarn can be added and the added value of the product is increased.

Description

technical field [0001] The invention relates to the new technology field of spinning, in particular to a double-layer wrapping yarn and a production method thereof. Background technique [0002] Parallel spinning, also known as wrapping spinning, uses a hollow spindle for spinning, and the yarn produced by a parallel spinning machine is called parallel yarn, also known as P.L yarn. In parallel spinning, a non-twisted parallel fiber strip is used as the core yarn, and the outsourcing filament or spun staple yarn is wound on the bobbin after being wrapped into yarn. Since the fibers of the core yarn are not twisted, it is called Parallel spinning. When the yarn is stretched, the filament exerts radial pressure on the short fiber sliver, which causes friction between the short fibers and makes the parallel yarn have a certain strength. [0003] Parallel yarn can replace thread, and it is suitable for untwisted, weak twist and pile products with its unique yarn structure, givi...

AI Technical Summary

Problems solved by technology

However, the current parallel spinning devices are all outsourced with single filament or spun yarn, which limits the variety of spinning and yarn quality.

Images