pet/ptt two-component Shue silk dyeing process

Abstract

The invention discloses a PET / PTT two-component stretch silk dyeing process. The PET polyester chips, the PTT polyester chips and the third polymer material are melted in a melter respectively, and then enter into a composite spinneret through a metering pump respectively. The composite yarn is extruded and spun; the composite yarn is formed into a crimped and elastic structure by drawing treatment and heat treatment; the third polymer material is evenly mixed with the pigment or masterbatch before entering the composite spinneret; It has high fastness, and not only will not adversely affect PTT and PET, but can even protect PTT and PET, reduce its aging, and prolong its quality stability and service life.

Description

technical field [0001] The invention belongs to the technical field of a fiber material preparation device, in particular to a PET / PTT bi-component elastic silk dyeing process. Background technique [0002] At present, ordinary polyester fibers are gradually becoming saturated in the market due to their low added value and high degree of homogeneity. The research and development of differentiated polyester fibers such as self-crimping fibers are increasingly important. Generally, crimped fibers are subjected to physical and mechanical action by the fiber's crimping device to produce a permanent crimped morphology, while self-crimped fibers do not require special crimping treatment, and only need to be drawn and heat treated to make their potential crimps appear. The processing cost of fibers can be significantly reduced. The side-by-side polyethylene terephthalate (PET) / polytrimethylene terephthalate (PTT) uses the large difference in thermal shrinkage properties between th...

AI Technical Summary

Problems solved by technology

However, these two methods have certain inherent shortcomings. Dyeing with disperse dyes is prone to uneven dyeing, large changes in dye uptake, low color fastness, uneven dyeing depth, and large differences in the parameters of PTT and PET dyeing. It is easy to be dyed into two colors or different colors and other disadvantages; while the method of adding color masterbatch has better color fastness, but the final color is difficult to control, the color is uneven, and the pigment of the masterbatch will appear in different materials. Different colors, so the predictability of coloring results is poor; and the addition of color masterbatch will have a significant adverse effect on the strength and elasticity of PTT and PET, especially affecting the strength, the product is easy to deform and twist; and more color masterbatch needs to be added , and it is necessary to use higher heat-resistant pigments, resulting in waste and a significant increase in cost