Silk broadcloth non-methanal discharge printing discharge paste and its discharge printing technique

Abstract

The invention discloses formaldehyde-free discharge printing discharge paste, a preparation method and application to pure silk discharge printing thereof. The pure silk discharge printing discharge paste comprises the following components in weight percentage: 60 to 75 percent of thickener, 4 to 6 percent of hygroscopic latent solvent, 0 to 5 percent of discharge-resistant dye, 3 to 7 percent of formaldehyde-free discharging agent, and 10 to 30 percent of water, wherein the formaldehyde-free discharging agent is thiourea dioxide, the thickener is modified plant seed plasmagel or compound discharge-resistant thickening paste the solid content of which is 8 to 13 percent, the hygroscopic latent solvent is urea, and the discharge-resistant dye is acid or neutral dye resistant to reduction of the thiourea dioxide. By applying the discharge paste to the pure silk discharge printing, the discharge paste can avoid the problem of release of formaldehyde by using the prior discharge agent, and is favorable for human health and ecological environmental protection.

Description

Technical field:

[0001] The invention relates to a formaldehyde-free discharge printing paste for real silk, a preparation method thereof, and a discharge printing process using the discharge printing paste. Background technique:

[0002] Silk fabric has the properties of soft luster, elegant appearance, soft texture, comfortable wearing, smoothness, breathability, and good skin care and health care effects. Discharge printing of silk fabrics is an important means to develop high-grade silk products. Discharge printing is a printing process that prints on dyed textiles, and with the help of chemicals (discharge agent) in the discharge printing paste, the ground color dye is partially destroyed and decolorized to obtain a pattern. Discharge printing can avoid the color recolor problem caused by direct printing, and achieve the effect of exquisite printing. Acid dyes have the characteristics of complete chromatograms and bright colors. Acid extraction is currently the main m...

Images