Composite processed filament and processing method thereof

Abstract

The invention discloses a composite processing yarn and a preparation method thereof. The core yarn is composed of polyester multifilament, the sheath yarn is composed of ultrafine polyester multifilament, and the polyester multifilament constituting the core yarn has a monofilament fineness of ≥1.5 after being drawn. dtox, the polyester multifilament constituting the sheath filament after drawing has a monofilament fineness ≤ 0.5dtox, and the length difference between the sheath filament and the core filament is 2-10%. The preparation method includes doubling two kinds of polyester multifilaments, drawing and false twisting at the same time under the condition that the ratio of untwisting tension TB to twisting tension TA TB / TA≥1.0 to obtain the product. The product obtained by the present invention has the fluffy feeling, soft feeling, dry loose feeling and moderate tension of staple fiber style.

Description

Technical field: [0001] The invention relates to a processed yarn, which is a sandwich or core-spun yarn processed yarn. Background technique: [0002] With the recent development trend, there is a great demand for knitted fabrics with excellent light weight and super long cotton style among the products with both function and style. Correspondingly, ultra-fine polyester multifilament or sea island Type, split type and other ultra-fine composite yarns are used as sheath yarns, and high-shrinkage yarns are used as core yarns to obtain intertwined mixed fiber yarns. Compared with natural ultra-long cotton spun yarns, these multifilament yarns lack the softness and bulkiness of fluffiness, and at the same time, the production cost becomes high due to the forced generation of fluff in the raising process during finishing after dyeing. At the same time, the obtained hairiness will be concentrated on the surface of the fabric, so it is relatively lacking in giving spun yarns a un...

AI Technical Summary

Problems solved by technology

However, such interlaced yarns overemphasize the style of one of the silks, and it is difficult to obtain a style that combines two completely different properties of softness and dryness. In addition, because short fibers are only expressed through loop hairiness For yarn-style hairiness, the loop length must be long, and the number of loop hairiness must be large, so not only will there be insufficient short-fiber yarn texture, but also zipper-like separation will easily occur.