Sodium alginate-based slurry, printing sizing agent and preparation methods thereof

Abstract

The invention discloses sodium alginate-based slurry, a printing sizing agent and preparation methods thereof. The sodium alginate-based slurry is made from the following ingredients in percentage by weight: 3-6% of sodium alginate, 0.04-0.06% of monosodium orthophosphate, 0.1-0.25% of disodium hydrogen phosphate, 0.5-1.5% of reserve salt, 2-3% of sodium bicarbonate, 2-4% of sodium sulphate, 7-10% of carbamide and 17-21% of soft water. The printing sizing agent is prepared by mixing the following ingredients in percentage by weight: 75-95% of sodium alginate-based slurry and 5-25% of viscosity modifier. With the adoption of color paste prepared from the printing sizing agent disclosed by the invention, the big flat meshwork printing quality can be improved, the printing effect can still be ensured after a vehicle speed is increased, the vehicle speed can be increased by 30% to 50%, the production efficiency can be increased by 100%, and the benefit is remarkably increased.

Description

[technical field] [0001] The invention relates to a high-speed flat-screen active printing technology in chemical dyeing and finishing of textiles, in particular to a sodium alginate-based slurry, a printing slurry and a preparation method thereof. [Background technique] [0002] For flat screen printing, the return position of the horizontal head is generally 160cm. After the printing is scraped, the screen will be lifted. Due to the small screen frame, the polyester screen will also have a small deformation (as shown in the figure), but it will not affect the printing effect, and there is no special feature in traditional products. Deep and bright colors, but after the horizontal head position is more than 250cm, because the plane of the polyester mesh reaches 9 square meters, and because the polyester mesh itself has a certain degree of elasticity, most of the products leading the market trend are rich in color and deep in color. Traditional color paste formulations, in o...

AI Technical Summary

Problems solved by technology

[0002] For flat screen printing, the return position of the horizontal head is generally 160cm. After the printing is scraped, the screen will be lifted. Due to the small screen frame, the polyester screen will also have a small deformation (as shown in the figure), but it will not affect the printing effect, and there is no special feature in traditional products. Deep and bright colors, but after the horizontal head position is more than 250cm, because the plane of the polyester mesh reaches 9 square meters, and because the polyester mesh itself has a certain degree of elasticity, most of the products leading the market trend are rich in color and deep in color. Traditional color paste formulations, in order to ensure that the rheology and shear modulus of the color paste meet the printing requirements, the viscosity of the color paste will be very high, and the adhesion between the mesh, color paste and fabric will produce a net The frame has been lifted and reset, and the middle part of the flat screen is still glued to the fabric. When the two are separated instantly, the screen will rebound to a certain extent. Due to the pull-up of the color paste and the rebound and throwing off the color point, the printing production efficiency and The appearance quality of the fabric

[0003] With the improvement of people's living standards, the color levels of home textile fabric printing are becoming more and more abundant, and the color brightness, purity, and depth will be further improved, and consumers are pursuing products without seams. The newly developed return is 250CM×250CM or more. For the returned products, the flat screen is made of high-strength polyester wire mesh, and the flat screen reaches 9 square meters. With the traditional color paste formula, the adhesion between the mesh wire, the color paste and the fabric will cause a problem when the net is about to be lifted. The screen frame has been lifted and reset, and it is still glued to the fabric in the middle of the screen. When the two are separated, the screen will produce a certain pull-up with color paste and rebound to throw off the color, and the color points will pop up to the patterns of other colors to produce a second time. Points, the lines are fluffy and not smooth, large areas of color blocks will be unevenly dyed, etc., which will affect the appearance quality of printed fabrics

As the contrast of the color of the fabric increases, and there are more and more dark-colored products with rich colors, the amount of dye will exceed the amount of dye by 10-50%, and the viscosity of the colorant will increase by 10-15%. Color paste printing large flat screen will also affect the fineness and effect of printing

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