Dyeing method for nylon-56 fibers

Abstract

The invention discloses a dyeing method for nylon-56 fibers. The dyeing method comprises the following steps that 1, dye liquor is prepared, wherein the dye liquor is prepared from acid dye, a leveling agent O and an acid-releasing agent shown in a formula I; 2, the nylon-56 fibers are immersed into the dye liquor, and dyeing is achieved at the temperature of 50 DEG C-90 DEG C. According to the dyeing method, the acid-releasing agent can be gradually decomposed into polyether and butanedioic acid at high temperature (higher than or equal to 50 DEG C), the pH value in a dyeing bath is controllably decreased by regulating the adopted polyether structure, therefore, the pH value of the nylon-56 fibers is gradually decreased to 3.5-4 from 6.5-7 in the initial dyeing stage, and the dyeing process is carried out smoothly and slowly.

Description

technical field

[0001] The invention relates to a dyeing method of nylon 56 fiber. Background technique

[0002] Nylon fabric is the first synthetic fiber to appear in the world. The appearance of nylon (foreign names include nylon, nylon, capron, etc.) makes textile fabrics look brand new. Its synthesis is a major breakthrough in the synthetic fiber industry. Nylon is a poly The domestic product name of amide fiber, it has many varieties, but the molecular structure contains the same amide group. The commonly used varieties are polycaprolactam for nylon-6, and polycaprolactam for nylon-66, which is formed by the polymerization of hexamethylenediamine and adipic acid. , Nylon 56 is a new type of polyamide fiber. Unlike nylon 66, which uses petroleum raw materials, it uses biological raw materials. Pentamethylenediamine is fermented from various starches and straw cellulose by bioengineering methods. Due to large quantities , low cost, it can replace hexamethylene diamine. ...

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