Modified starch slurry used for heat-sensitive chaine low temperature starching and preparation method thereof

Abstract

The invention discloses modified starch slurry used for sizing heat-sensitive chaine at low temperature and a preparation method thereof. The modified starch slurry is modified starch slurry processed with multiple esterification. In the multiple esterification of the starch, esterification through acetic acid is indispensable, but not enough, and esterification through phosphoric acid or esterification through carbamic acid is necessary to remodify the starch which is esterified by acetic acid. With the technical proposal, even when sizing under 60-80 DEG C, the slurry has good fluidity, good thermal stability and strong anti-gel property, and the product has strong adhesiveness to wool, viscoce and dyed yarn fiber and can meet the requirement on sizing heat-sensitive chaine like wool, viscoce and dyed yarn fiber at low temperature on a cotton sizing machine. The sized yarn can be woven through a common shuttle loom and meet the weaving requirement of a high speed weaving machine.

Description

technical field [0001] The invention belongs to the modified starch size used in textile warp yarn sizing and its preparation method, in particular to the modified starch size suitable for low-temperature sizing of wool, viscose, yarn-dyed yarn and other heat-sensitive warp yarns on a cotton sizing machine and its preparation method. Background technique [0002] Warp yarn sizing is a key process in the textile production process. Its purpose is to improve the wear resistance of warp yarns, reduce warp yarn hairiness, increase warp yarn strength, and maintain warp yarn elasticity and elongation at break, so as to reduce the weaving broken end rate and improve production. Efficiency, the purpose of improving product quality. [0003] Wool, viscose and yarn dyed warp yarns all fall into the category of heat sensitive yarns. Wool fiber will seriously damage the mechanical properties of warp yarn under high temperature and high humidity, so wool yarn can only be sized at a low...

AI Technical Summary

Problems solved by technology

[0007] Modified starch sizing, such as oxidized starch, phosphate starch and acetate starch, is currently used on cotton sizing machines for sizing heat-insensitive warp yarns (such as pure cotton warp yarns, synthetic fiber warp yarns, cotton / synthetic fiber blended warp yarns, etc.) , urethane starch, carboxymethyl starch and compound modified starch, etc., although the properties of the size film, the water dispersion properties of the size, the adhesion to the fiber, the viscosity stability, etc. have been significantly improved, and can be better applied to the warp yarn In cotton-type high-temperature sizing, there are still problems such as the sensitivity of the size to temperature. When the temperature is lowered, there will be problems such as poor flow, poor viscosity stability of the size, and a sharp drop in adhesion performance. Therefore, they must be used at a higher temperature. It is used at high temperature (usually above 95°C), and it cannot be used in the sizing of temperature-sensitive warp yarns.

Images