Mercerization of modal or viscose fabric and multi-stage expansion device for mercerization

Abstract

The invention discloses mercerization of a modal or viscose fabric. The mercerization of the modal or viscose fabric comprises the following steps: a, bleaching a fabric to obtain a product A; b, soaking and rolling the product A with KOH alkali liquor to obtain a product B; c, carrying out multi-stage expansion on the product B to obtain a product C; d, flatly expanding the product C to obtain aproduct D; e, washing the product D to obtain a product E; f, neutralizing the product E with acid to obtain a product F; g, washing the product F to obtain a product G; and h, drying the product G toobtain a finished product. In the step b, the product A is soaked and rolled repeatedly with the KOH alkali liquor to obtain the product B; and the KOH alkali liquor container KOH with the mass concentration being 20%-24%. The mercerization of the modal or viscose fabric has the advantages that a modal or viscose and cotton fiber blended and interlaced fabric is mercerized, thus, the modal or viscose and cotton fiber blended and interlaced fabric does not have flash on a fabric surface, color change of the fabric is weak after the fabric is washed, and the color of the fabric is unlikely to fade, and the strength of the viscose-containing fabric can further be improved.

Description

technical field [0001] The invention belongs to the mercerizing field of fabrics containing modal or viscose and fabrics of pure modal or viscose fibers. Background technique [0002] Mercerizing refers to the process of treating fabric or yarn with caustic soda solution under tension, and then washing away caustic soda under tension. Traditional mercerizing is tight padding with 20-26°BèNaOH lye, which is aimed at natural cellulose fibers, that is, cotton fibers, while it is taboo for modal and viscose artificial cellulose fibers. Sodium hydroxide will make the two Fiber hydrolysis. Therefore, for fabrics containing modal or viscose, such as fabrics that are blended with man-made cellulose fibers and natural cellulose fibers, that is, fabrics that are blended with modal or viscose and cotton fibers, the dyeing effect of the fabric cannot be improved by NaOH mercerizing. Due to the different color-gaining ability of the fibers, it is easy to cause the color of unmercerized...

AI Technical Summary

Problems solved by technology

Some existing expanding devices only undergo a simple expansion and one dipping, the stretching effect is not good, the impregnation permeability and uniformity of the fabric are not enough, and the quality of the fabric needs to be improved; , it needs to go through multiple impregnation rollers and padders distributed side by side. The equipment is large in size and covers a large area. In order to fully soak the fabric, the volume of the impregnation tank is large and the demand for impregnation liquid is large, resulting in high cost of site and equipment.

Therefore, the existing primary expansion device has the problems of poor stretching effect, impregnated fabric impregnation, and insufficient uniformity, and the existing multiple expansion device has the problems of large equipment footprint and high cost

[0006] Therefore, traditional mercerizing has the disadvantage that it cannot be used for fabrics containing modal or viscose, which makes the fabrics containing modal or viscose have flashes on the surface of the fabric, large discoloration of washed fabrics and easy darkening of colors, and cannot improve the deep dyeing effect of fabrics. Defects, the traditional mercerizing also has the defect that the fabric containing viscose cannot improve the strength of the fabric, and the pure viscose or modal fabric has the defect that the shrinkage rate changes greatly; the existing primary expansion device has poor stretching effect and fabric impregnation. The problem of insufficient permeability and uniformity, the existing multiple expansion devices have the problems of large equipment footprint and high cost

Images