Desizing-free polyacrylate emulsion slurry for one-step dyeing and weaving and preparation method thereof

Abstract

The invention discloses a desizing-free polyacrylate emulsion slurry for one-step dyeing and weaving and a preparation method thereof. The method comprises preparing soft monomers, hard monomers, functional monomers and deionized water into monomer pre-emulsion at a room temperature, dissolving an initiator with the deionized water so as to prepare into an initiator solution, adding the deionized water and a pH buffering agent into a reactor, stirring and heating to 75 + / - 5 DEG C, simultaneously adding the monomer pre-emulsion and the initiator solution into the reactor in drops, controlling a reacting temperature at 80-85 DEG C to obtain a cross-linking type polyacrylate emulsion, adding the cross-linking type polyacrylate emulsion into a stirring tank, adding a lubricant, a paint color paste, an antifoaming agent and a thickening agent, stirring, discharging, filtering and packaging. By using the slurry to dye, dyeing and weaving processes for denim blending and warping can be simplified, adhesiveness of the slurry and dyeing components onto yarns is improved, weaving performance of the yarns is ensured, desizing is not needed after weaving, and waste water discharge as well as resource and energy waste can be reduced.

Description

technical field [0001] The invention belongs to the technical field of textile printing and dyeing, and relates to a desizing-free special polyacrylate size suitable for one-step dyeing and weaving of denim blended warp yarns (such as T / R, T / C, etc.) and its preparation method and application Background technique [0002] At present, the denim warp yarn varieties blended with various fibers (natural fibers, regenerated fibers and synthetic fibers) are gradually increasing, especially polyester-cotton (T / C) and polyester-viscose (T / R) blended warp yarns are more common. For polyester-cotton (or polyester-viscose) blended denim warp yarns, due to the difference in chemical structure and performance between polyester fibers and cotton fibers, two different types of dyes are usually used for dyeing, polyester uses disperse dyes, and cotton / cotton fibers Viscose fibers use more reactive dyes. Because polyester lacks functional groups that can directly bind with dyes, and polyest...

AI Technical Summary

Problems solved by technology

However, the traditional sizing (mainly starch sizing, accounting for about 70%) used in these weavings is not only brittle and hard, which affects the wearing comfort of the woven fabrics after weaving, but also often has certain defects in its wear resistance during weaving. After the sizing on the sized yarn forms a film, it will bring difficulties to the subsequent functional finishing process, and desizing treatment must be carried out after weaving, which will not only bring about the same problem of sewage discharge and environmental pollution (all desizing sizing and Part of the pollution of decolorizing dyes), also caused a waste of resources (food, size, water, desizing agent, etc.) and energy waste (electricity, steam)

[0004] In order to overcome the deficiencies in the film-forming properties of traditional starch sizing, and in order to save food resources, in recent years, countries have devoted themselves to the development of polyacrylate or polyacrylate sizing that can replace starch sizing. However, these new polyacrylic sizing is only For the purpose of replacing the traditional starch size, based on its easy desizing characteristics, too many hydrophilic groups are often introduced, and its adhesion performance is usually insufficient; or in order to improve its adhesion characteristics, the designed polyacrylic size The glass transition temperature of the material is often too low, and there are phenomena such as moisture absorption and stickiness, which are not suitable for the one-step dyeing and weaving function requirements of denim blended warp yarns.

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