Preparation of a polypropylene fiber fabric and its liquid multi-combination printing and dyeing pretreatment process

Abstract

The invention discloses a preparation of a polypropylene fiber fabric and a liquid multi-combination printing and dyeing pretreatment process. The selected warp and weft thread materials are calculated in parts by mass: 40-90 parts of polypropylene fiber, 20-40 parts of combed cotton, and ultra-fine denier 8-18 parts of polyester, in the sizing process, add a liquid multi-component auxiliary agent to the size, the pH value of the liquid multi-component dyeing auxiliary agent is 2g / L: 8.5±1; among the auxiliary agents: sodium hydroxide, chelate The mixture and sodium hexametaphosphate are respectively in parts by mass: sodium hydroxide: 0.5-1.5 parts, chelating agent: 0.2-0.5 parts, sodium hexametaphosphate: 0.2-1 parts, sodium hydroxide, chelating agent and hexametaphosphate The mass ratio of the total mass of sodium phosphate to water is 2:50; and after the sizing process is finished, according to the dye concentration of the fabric to be kept warm for 50-80min; the present invention can make the fabric have high elasticity, high strength, warmth, heat resistance and light resistance At the same time, it can quickly permeate and diffuse on the fabric to the fiber in the subsequent dyeing solution, effectively preventing the vat difference, color flower, color difference and solid color spots during the printing and dyeing process.

Description

technical field [0001] The invention belongs to the technical field of textiles, in particular to a preparation of polypropylene fiber fabric and a pretreatment process of liquid multi-combination printing and dyeing. Background technique [0002] Polypropylene fiber is also called polypropylene fiber. The source of raw materials is abundant, the production process is simple, and the product price is relatively lower than other synthetic fibers; the physical and mechanical properties of the fiber are characterized by: high strength (4-6 grams / denier for short fibers, 5-8 grams / denier for filaments), wet The strength and dry strength are basically the same, the specific gravity is small (0.91), wear resistance and corrosion resistance, etc.; due to the advantages of simple production process, low price, high strength and light relative density, polypropylene has developed rapidly. At present, polypropylene fiber is the fourth largest variety of synthetic fibers and the light...

AI Technical Summary

Problems solved by technology

[0004] Polypropylene fiber is light and warm, and has almost no moisture absorption, but it has strong wicking ability and obvious moisture absorption and perspiration effect; polypropylene fiber has little hygroscopicity and almost no moisture absorption, and its moisture regain is close to zero under general atmospheric conditions; but it has The wicking effect can transmit water vapor through the capillary in the fabric, but it does not have any absorption effect. The dyeability of polypropylene fiber is poor and the color spectrum is incomplete; High cost, inconvenient to use, and a new product developed, with calcium hydroxide as ingredients, while effectively reducing the cost of alkali agents for dyeing, it can also improve the first-time success rate of dyeing and significantly reduce the overall cost of dyeing

[0005] However, although the substitute alkalis on the market have the above-mentioned advantages, there are still some problems in the process of use. The substitute alkalis have obvious selectivity to the color-fixing effect of the polypropylene fiber structure reactive dyes; The highest color fixation rate of dyes is 5%-10% lower than that of anhydrous sodium carbonate as alkali agent. The dye uptake rate of some dyes is not stable, the dyeing shade deviates from soda ash dyeing, and contains a large amount of color difference, etc., which still exist as substitute alkalis. The most important problem is the deviation between the fixation rate and the hue of soda ash, especially the red coffee and purple, which are not as deep as soda ash. The difference between the hue and soda ash is too large, and the effect is not ideal; Calcium precipitates are easy to form in the dyeing vat during use, which is difficult to remove, which greatly affects the quality of subsequent printing and dyeing