Atmospheric pressure easy dyeing regenerated polyester filament and its preparation method

Abstract

The invention provides a normal-temperature chromophilous recycled polyester filament yarn and a preparation method thereof. A nano inorganic particle is modified by using a depolymerization product at a lower temperature, and thus the heat stability of an inorganic component is improved, and the porosity of a recycled polyester structure is enlarged; and meanwhile, through adding an additive capable of changing the degree of crystallinity and the crystallization rate of the recycled polyester and reducing the melting point, the structure and the performance of the recycled polyester are changed, and the dyeing property and the mechanical property of fibers are improved, so that the normal-temperature chromophilous recycled polyester filament yarn is prepared. The mechanical strength and the dyeing property of the normal-temperature chromophilous recycled polyester filament yarn are greatly improved in comparison with those of pure Dacron, and thus the creative industrialized production is achieved. The preparation method is simple, economic and environment-friendly, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to a synthetic fiber and a preparation method thereof, in particular to a normal-pressure easy-dyeable regenerated polyester filament and a preparation method thereof Background technique [0002] Polyester plastic products are used in large quantities due to their wide range of uses, resulting in the accumulation of a large amount of waste polyester and environmental pollution. And it is based on petroleum resources, and it will also cause the depletion of petroleum resources within a few decades. Therefore, resource regeneration technology is a necessary means to avoid oil depletion and environmental pollution. The "Twelfth Five-Year Plan" Guiding Opinions on Comprehensive Utilization of Resources clearly pointed out that we will strive to increase the recycling rate of major renewable resources to 70% by 2015, and focus on the development of "recycling of waste plastics" and "waste textiles" field, so the regeneration of poly...

AI Technical Summary

Problems solved by technology

However, at present, due to the purity of its renewable resources and the change of its structural properties, it is mainly the development of short fibers at present, and it is difficult to prepare high-quality fiber products, resulting in its application being limited.

[0003] In addition, due to the tight molecular structure of polyester, it is difficult to dye polyester. In order to improve the dyeing performance of polyester fibers, physical or chemical modification methods are usually used to change the molecular structure or supramolecular structure of polyester fibers, and to introduce dye molecular acceptors or Increase the space for dye molecules, and prepare a series of cationic and anionic dyeable polyesters, but most polyester fibers still need to be dyed with disperse dyes

However, the high-temperature and high-pressure dyeing method has the disadvantages of high energy consumption, difficulty in continuous industrial production, and difficulty in dyeing in the same bath with fibers such as spandex and wool that are not resistant to high temperatures.

Images