General purpose color paste for solvent ink

Abstract

The invention relates to a generally used color for printing ink. It is characterized in that comprised material and their weight proportion are as follows: pigment 25- 80%, keto-aldehyde resin 5- 32%, ester solvent 10- 40%, dispersing agent A 1- 9% or dispersing agent B 1- 6%, surface processing agent 0- 5%. Said keto-aldehyde resin is characterized by high softening point, outstanding pigment wetting property and soluble property, and good compatiablility with various resins, solvents and adjuvants, and it includes nadone- polyacetal, fat acetal resin, acetyl benzene- acetal resin and etc. The invention is characterized by good color compatability, metering injection way, suitability for factory or shop color mixing, strict control for color phase, color strength and flow index, and high color concentration.

Description

technical field [0001] The invention relates to a solvent ink for printing, in particular to a color paste used in the solvent ink. Background technique [0002] Solvent inks are mostly used for plastic film printing. They can be used for gravure surface printing, gravure back printing, letterpress and other printing methods through volatilization and drying. They are suitable for printing on various processed polypropylene (PP) / polyethylene (PE) / Polyester (PET) / polyvinyl chloride (PVC) / polystyrene (PS) plastic film and aluminum foil, paper, woven bag, etc. According to the resin system, solvent ink can be divided into: PA polyamide system, NC nitrocellulose system, chlorinated vinegar system, PU polyurethane system, PVB polyvinyl butyral system, CPP chlorinated polypropylene system, etc.; Divided into: benzene-soluble type, ketone-ester-soluble type, and alcohol-soluble type. The color of solvent ink should be able to meet the requirements of color printing of various pa...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: the color matching is not accurate; the batch color of the ink fluctuates greatly, and the color difference between each batch of products is large, which brings great difficulty to the color matching work; various pigments cannot be fully dispersed, and cannot Give full play to the best performance of various pigments; low dispersion efficiency and small production capacity; heavy equipment cleaning workload and waste when turning colors; large inventory and large capital occupation

Its shortcomings are: due to the wide variety of inks, hundreds of different base inks are often required, so the production cycle is long, the production is complicated, and the management is difficult; a large number of single-color slurry storage tanks are required, and equipment, products and funds are occupied. High volumes; color grading is not possible in places such as printing houses far away from the factory

Its shortcomings are the same as the second method, and the cost of color chips is relatively high