Discolouring fibers, discolouring coloured spun yarns and fabric, and processing method of fabric

Abstract

The invention relates to discolouring fibers, discolouring coloured spun yarns, a discolouring coloured spun fabric, and a processing method of the fabric. The processing method comprises the following production steps: preprocessing cotton fibers, then performing cationic modification treatment to improve the cationic property of the cotton fibers, dyeing by a thermo-sensitive discolouring dye with a microcapsule structure, fixing colour and drying, thus obtaining the temperature-change discolouring cotton fibers; then spinning by a spinning process of coloured spun yarns to obtain the discolouring coloured spun yarns; and performing the procedures of weaving and post-finishing on the discolouring coloured spun yarns, thus obtaining the discolouring coloured spun fabric. The product of the processing method has the characteristics of hazy sense, strong three-dimensional sense, and veiled, natural and layered colours of coloured spun yarns, and also has the styles of changeable colours and strong randomness of discolouring yarns. Meanwhile, the fibers are used for modifying and dyeing, so that a large quantity of water resources can be saved; the dye and the fibers are bonded through ionic bonds, so that the coloured spun yarns and fabric are excellent in washing fastness and colour durability and have a brand new style.

Description

technical field [0001] The invention relates to the technical field of textiles, and is a new type of color-changing fiber, color-changing color-spun yarn or fabric, specifically a method of treating the fiber with a microcapsule temperature-sensitive color-changing dye, and then spinning and weaving the fabric. A color-changing fiber, a color-changing color-spun yarn and a color-changing color-spun fabric that can change color with temperature changes are obtained. Background technique [0002] Color spun yarn is generally spun into yarn with two or more fibers of different colors or different properties. , it will make the cloth surface present a multi-colored, soft-feeling, and full-feeling style, which increases the added value of the product. Conventional cotton-type fibers are dyed to obtain colored fibers and then spun into colored spun yarns. Chemical fibers basically use dope coloring technology to add color masterbatch to the spinning solution for melt spinning t...

AI Technical Summary

Problems solved by technology

[0004] Color-changing dyes have been applied to fabrics, mainly by adding adhesives to paints for high-temperature baking, or by pigment printing and coating, but they are commonly used Due to the defects of poor color fastness, hard hand feeling and poor durability, it is not feasible to dye cotton fiber with conventional color-changing dye dyeing process. The main reasons are as follows:

[0005]1. Cotton fibers are dyed in a fluffy state. If adhesives are added for fixation, there will be serious adhesion between cotton fibers and it is difficult to separate them. It is also impossible to carry out subsequent spinning processing;

[0006]2. Since color-spun yarns need to be washed in multiple channels after weaving into fabrics, the fastness of conventional color-changing dyes cannot be washed in multiple channels, otherwise Discoloration is severe and cannot be used

[0008] However, their modification methods cannot be used in microcapsule color-changing dyes, and there are mainly the following problems:

[0009]1. The anionicity of the microcapsule is very weak. It is just a spherical shell with a thermochromic body inside, and its anionicity is very weak. , which is different from the anionic nature of anionic dyes and natural dyes, so if you only want to combine the modified cationic groups with dyes, the dye uptake and various fastnesses must not meet the requirements and cannot be used;

[0010]2. The amount of modifier and caustic soda used is very large, the modifier has exceeded 10g / L, the processing cost is very high, it is difficult to use in actual production, and the natural The color of the dye is very dim, and there are few varieties. The uneven modification will cause the color of the dye to fade. There are no pure natural dye products on the market, and they have not been promoted to the market. They are very immature