Formaldehyde-free non-iron finishing method for in-situ polymerization-crosslinking of unsaturated carboxylic acid of cellulose fiber fabric

Abstract

The invention relates to an unsaturated carboxylic acid in-situ polymerization-crosslinking formaldehyde-free non-iron finishing method of cellulose fiber fabric. The method comprises the following steps: (1) preparing a formaldehyde-free non-iron finishing solution at a room temperature: mixing unsaturated carboxylic acid, a catalyst, a radical initiator, a softening agent, an osmotic agent, and water, and stirring to dissolve the components so as to obtain a uniform and stable non-iron finishing solution; (2) soaking fabric into the formaldehyde-free non-iron finishing solution until the liquid content is in a range of 60 to 90%, baking the fabric at a temperature of 70 to 100 DEG C for 1 to 5 minutes, and then baking the fabric at a temperature of 160 to 190 DEG C for 30 seconds to 8 minutes. The solution preparation and fabric soaking can be carried out at a room temperature, the temperature of the finishing solution does not need to be maintained in a certain range, moreover, the drying time is very short, and formaldehyde is not used during the processing process or after the processing. The wrinkle recovery angle of the processed fabric is larger than 270 degrees, the DP grade is not less than 3.3 grades, the tensile strength of middle-thin fabric before washing is not less than 200 N, and the tear strength is not less than 6.5 N.

Description

technical field [0001] The invention belongs to the field of finishing methods of fabrics, and in particular relates to a formaldehyde-free non-ironing finishing method of unsaturated carboxylic acid in-situ polymerization-crosslinking of cellulose fiber fabrics. Background technique [0002] Although cellulose fiber fabrics and their products have excellent wearing comfort, they wrinkle after washing and are poor in careability. Generally, non-ironing finishing is required to improve their careability. Although the commonly used N-methylol amide non-ironing finishing agents can give fabrics an ideal non-ironing effect and are low in cost, there is a problem of formaldehyde. Polycarboxylic acid is a kind of formaldehyde-free non-iron finishing agent that is researched the most, and Welch et al. propose polycarboxylic acid such as butane tetracarboxylic acid (BTCA) in US4820307 under high-temperature baking and catalyzer such as sodium hypophosphite existence condition, It c...

AI Technical Summary

Problems solved by technology

[0004] Unsaturated carboxylic acid can also be directly used as formaldehyde-free non-ironing finishing agent for non-ironing finishing of cotton fabrics, but when preparing and padding the finishing solution, the temperature of the finishing solution should be kept at 30±2°C, and the pre-drying process is usually Requires higher temperature and longer time (100℃×10min)

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