Printing auxiliaries

Printing auxiliaries are pigment printing, which uses the film-forming effect of the binder to firmly adhere the insoluble dyes to the fabric, so as to achieve the purpose of coloring.

The binder is the main component of the pigment printing paste, and it is a polymer film-forming substance, which adheres the paint to the fabric through film formation. Anti-aging, solvent resistance, acid and alkali resistance, chemical resistance, clear and transparent film formation, no discoloration after printing, no fiber damage, certain elasticity, good hand feeling, and easy to remove from the printing machine.

Thickener is another essential component of pigment printing paste. The printing and dyeing machinery has the functions of thickening the dyeing, promoting adhesion and emulsification, etc., and the printing fabric can obtain a uniform, soft and clear pattern. Not only can it improve the color quantity and brightness, but also do not use or use less kerosene in the printing paste, so as to reduce the pollution to the air. There are two types of synthetic thickeners: anionic and non-ionic. The former has strong adaptability and can be used for anti-dyeing and dyeing printing, but the thickening effect is poor; the latter has a high viscosity and thickening effect, which is suitable for printing fabrics. The color brightness, scrub fastness and softness of the hand are not adversely affected.

The main function of the cross-linking agent is to improve the fixing ability of the adhesive. The printing has better firm performance. The printing and dyeing machine can also reduce the curing temperature, combined with the actual short curing time, but the amount should be appropriate, otherwise it will cause the fabric to feel uncomfortable. not good.

The emulsifier is added in order to obtain a good emulsification thickener. Generally, the alkylphenol polyoxyethylene ether with end group is used, and then the end group is blocked with isocyanate.

Pigment printing auxiliaries also include softeners, diffusing agents and defoaming agents.