High-shrinkage cation normal-pressure easy-to-dye polyester chip and preparation method thereof

Abstract

The invention discloses a high-shrinkage cation normal-pressure easy-to-dye polyester chip and a preparation method thereof. The high-shrinkage cation normal-pressure easy-to-dye polyester chip comprises the following components: 66-68 percent of purified terephthalic acid, 23-21 percent of glycol, 3.2-5.5 percent of isophthalic acid digylcol ester-5-sodium sulfonate, 2.1-3.3 percent of polyethylene glycol, 0.5-0.7 percent of isophthalic acid, 3.1-4 percent of hexanedioic acid, 0.012-0.036 percent of antimony acetate and 0.005-0.055 percent of antioxidant. The high-shrinkage cation normal-pressure easy-to-dye polyester chip is subjected to an esterification reaction at the pressure of 0.25-0.3MPa and the temperature of 250-260DEG C and a polycondensation reaction at the temperature of 230-270DEG C and at the vacuum degree of 0.08-0.098MPa and temperature preservation after the temperature reaches 272-278DEG C. The high-shrinkage cation normal-pressure easy-to-dye polyester chip has the advantages of high dyeing rate and dye suction rate at normal temperature and normal pressure, bright color, favorable performances of high shrinkage and resisting pilling, spinnability, drafting property and favorable physical property and post treatment performance of fibers.

Description

Technical field: [0001] The invention relates to a polyester chip and a preparation method thereof, in particular to a high-shrinkage cationic normal-pressure dyeable polyester chip and a preparation method thereof. Background technique: [0002] The polyester industry has developed from the simple polymerization of binary monomers to a comprehensive technology with multi-disciplinary technology compound penetration. my country's differentiated and functional polyester started late, but developed rapidly. At present, the market supply of conventional polyester products exceeds demand, and polyester products are gradually developing towards high performance and materialization. High value-added functional polyesters have attracted more and more attention from domestic enterprises and scientific research institutes because of their special functions. Many domestic production technologies are in the research and development or pilot stage, mainly relying on imports. However, ...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that dyeing is difficult due to the characteristics of polyester macromolecular structure and the lack of polar groups combined with dyes, and it is impossible to dye dyes at normal temperature and pressure, and also does not have high shrinkage performance. A high-shrinkage cationic normal-pressure dyeable polyester chip and its preparation method

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