Sizing treatment process for denim warp yarns

Abstract

The invention relates to a denim warp sizing treatment process which comprises the following steps: firstly, dispersing polyacrylamide in water, adding a hydrogen peroxide aqueous solution, and treating at a certain temperature for a certain time to form a polyacrylamide solution with the viscosity of 30-50mPa. S; then adding a functional auxiliary agent into the obtained polyacrylamide solution, or further adding a water-based molecular cross-linking agent (the water-based molecular cross-linking agent is added into a non-desizing product) and other auxiliary components to form a sizing treatment solution; and finally, the sizing treatment liquid is pumped into a size tank of a sizing machine, the temperature of the size is set to be 45-85 DEG C, the warp yarn is subjected to padding sizing through a size dipping method, the liquid rate is controlled to be 100-110%, then drying is conducted till the moisture regain is 8-10%, then waxing is conducted, and leasing and winding are conducted to form a warp beam. The method has the advantages that the polymer is safe and environment-friendly, the source is stable and reliable, the modification operation is simple and convenient, the warp sizing percentage and sizing temperature are reduced, the color darkness and fastness of the denim prepared from the warp are further improved, the denim is endowed with the advantages of soft hand feeling, antibacterial function and the like, and the method has a better application prospect.

Description

technical field [0001] The invention belongs to the technical field of denim fabric production, and relates to a sizing treatment process for denim warp yarns. Background technique [0002] Denim is a kind of wear-resistant fabric made of indigo-dyed warp and weft. Due to the special smell of plant indigo and the effect of repelling insects, it has a long history. From its invention to the present, denim clothing has been widely loved and has huge consumer demand. During the decades of development in China, it has gradually become a daily clothing suitable for all ages from an alternative symbol. [0003] The production of denim belongs to the process of dyed yarn spinning, the most important of which is the dyeing and sizing process of denim warp yarn. There are two main dyeing and sizing processes. One is that the warp yarn is dyed first and then sizing. It is carried out on the sizing machine, in which dyeing can be divided into ball dyeing, bobbin dyeing and hank dyeing...

AI Technical Summary

Problems solved by technology

[0004] Denim warp yarn dyeing process is very important, it affects the overall appearance of denim fabrics, determines the weavability of denim warp yarns and the fabric style of denim fabrics to be woven subsequently, but the traditional dyeing process is long, energy-consuming, and consumes The large amount of water and the large amount of sewage are not in line with the contemporary concept of environmental protection. At present, there are many technological and technological improvements working towards the direction of environmentally friendly dyeing and weaving.

[0005] In the denim warp dyeing process, the traditional method needs to add a large amount of reducing agent sodium hydroxide and alkaline agent sodium hydroxide, these substances are the main source of chemical oxygen demand in denim dyeing wastewater; the use of these sulfur-containing reducing agents will also affect Workplace Workers' Health