(2) alkali and alkaline acid retreat paddle hot dilute caustic soda solution can make all kinds of pastes swell, but also increase the solubility of some pulp, beach warning flags for sale so that the adhesion of the pastes and fiber loose and easier to wash under the mechanical action In addition to most of pastes, alkaline retire the paddle rate of 50% to 70%.
Cotton and dyeing mill in dilute alkali and waste lye, such as the light after the mercerizing lye, Wind Flags Advertising scouring the waste lye can be used to base retirement paddle. Desizing effect is poor, but applicable to all types of pulp, but also remove other impurities and some cotton seed hull, and can reduce costs for many and dyeing. beach warning flags for sale
Alkali retreat paddle operating padding lye after the singeing fire-fighting tank, tank lye concentration of 3 ~ 5g / L, temperature 80 ~ 85 ℃. Rolling go to the fabric after the excess lye into the cloth guide ring to a rope, and then the washing machine a second time rolling rope rolling alkali and alkali concentration 10g / L, temperature of 7O ~ 80 ° C, and containing a small amount of wetting agent . And then piled up in the the desizing pool, thermal insulation piled 6 ~ 12h. Width retreat paddle alkali concentration – like about 10 g / L, steaming in the 100 ~ 102 ℃ ~ 1.5h. Alkaline desizing must be approved by hot water, washed thoroughly in cold water, especially PVA slurry should Qinhuan lotion, avoid PVA concentration increased adhesion of the fabric. beach warning flags for sale
Alkaline desizing after washing, padding 5g / L sulfuric acid solution, and then piled about lh, full water wash. This method is called alkaline acid desizing method for containing low-level cotton impurities and close the fabric such as poplin cotton fabric. Alkali-acid desizing on the removal of the cotton fiber impurities and minerals better, and improve the semi-finished white and absorbent. Alkali acid desizing rate of 60% to 80%. Advertising Flags For Businesses
(3) the oxidant desizing strong oxidant such as salts, hydrogen peroxide, Asia and sodium bromate, a variety of pulp slurry degradation of macromolecules breaking role, which is easily washed from the fabric in addition to. Oxidant desizing speed, high efficiency, uniform texture, as well as some bleaching effect. Strong oxidizer cellulose oxidation, so conditions should be controlled so that the fiber strength as far as possible. Wind Flags Wholesale Oxidant for desizing, Asia sodium bromate is a good one, retreat slurry containing effective bromine from 0.5 to 1.5g / L and the amount of wetting agent, Personalized Advertising Flags the retreat slurry pH 9.5 ~ 10.5 and fabric padding retreat serous after room temperature piled about to 0.5h. Asian sodium bromate can also be used for bromine – alkali one bath desizing, scouring, desizing and alkaline scouring with the bath, greatly simplifying the process. Asia sodium bromate desizing higher rate, up to 90% to 95% PVA slurry, and will not wash thickening re-adhesion of the PVA concentration in the fabric, but because of the more expensive Asian sodium bromate, Discount Swooper Flags the current The application is not yet widespread. Custom Swooper Flags Wholesale beach warning flags for sale Over ammonium sulfate is also a good desizing oxidants. Oxidant desizing wider use of hydrogen peroxide – caustic soda desizing method, usually a bath retreat slurry containing hydrogen peroxide 4 ~ 6g / L, the amount of caustic soda 10g / L wetting agent and fabric padding retreat serous , steaming at 100 ~ 102 ° C 1 ~ 2min, then with 80 ~ 85 ℃ hot water wash. Oxidants the desizing mainly used for the desizing of PVA and its hybrid plasma.
3. Scouring desizing Wash fabric to enter the scouring process. Scouring is the main processes in the pre-treatment process of cotton and cotton fabrics, cotton fiber associated with biological, cottonseed hull and desizing residual slurry must be removed by scouring. Enable fabrics to get a good wettability and appearance, beach warning flags for sale to Li Houjia work carried out smoothly.