Modified polyester composite filament durable elastic woolen sweater and preparation method thereof

Abstract

The invention discloses a modified polyester composite filament durable elastic woolen sweater and a preparation method thereof. PET and PTT polyester composite filaments and wool or wool blended spun yarns are doubled to form composite yarns serving as a core, and the PET and PTT polyester composite filaments are stock solution colored or white self-crimping filaments; and the wool fabric has 10-40% tensile elasticity in the warp and weft directions. The woolen sweater has the advantages of stable and lasting elasticity, strong woolen feeling and simplicity and convenience in processing. The wool fabric with lasting elasticity, controllable elasticity, hank dyeing, wool feeling, strong force and high cost performance can be provided, and aiming at the problems that the existing wool spandex elastic fabric is easy to loosen and expose white, and the wool / high-temperature dyeable polyester elastic filament fabric is difficult to dye and easy to dye, the low-temperature dyeable self-crimping composite elastic white filament is adopted, through a Sirofil spinning or doubling twisting mode, by controlling the off-machine size of a flat knitting machine and the temperature, time and bath ratio of drying and washing, and by combining key process control such as spinning, hank dyeing and the like, the product is prepared.

Description

technical field [0001] The invention relates to the technical field of novel textile materials, in particular to a durable elastic woolen sweater of modified polyester composite filament and a preparation method thereof. Background technique [0002] Worsted wool knitting yarn is usually dyed by strip dyeing and then combed to achieve fiber dyeing, top color mixing, and spinning. This long-process color spinning process leads to a long process of R&D and proofing, and it is relatively difficult to realize different colors of the same sweater. [0003] The main raw material of woolen sweater is wool short fiber, and the surface is covered with more or less scale layers, which makes its reflective performance for visible light very different from that of smooth synthetic fiber filaments, making synthetic fiber filaments difficult to use. In woolen sweaters, even dope-dyed filaments have the risk of having a different shade from wool fibers, resulting in color blooms and signi...

AI Technical Summary

Problems solved by technology

The disadvantage of this type of elastic fiber application is: it cannot be used as bare silk, and it must be covered with other fibers as a core yarn to have practical value; it needs special core yarn equipment to process, and the processing process is long and the elasticity is difficult to control Uniform; at the same time, this type of elastic fabric has the disadvantages of easy relaxation and poor chemical stability when used repeatedly

However, obviously, since PET / PTT needs high temperature and high pressure dyeing, it cannot be skeined with wool fiber, and dope dyed filament is needed to achieve the elasticity of wool fabric

It is difficult to coordinate with the color of wool fiber, and the fabric is prone to flashing and different colors, etc.