UV (ultraviolet) color change resistant environment-friendly dye paste and preparation method thereof

Abstract

The invention discloses UV (ultraviolet) color change resistant environment-friendly dye paste and a preparation method thereof. The dye paste is prepared from the following ingredients in parts by weight: 8 to 16 percent of non-heavy metal complex dye, 0.2 to 3 percent of ultraviolet absorbents, 0.5 to 1 percent of auxiliary agents and 80 to 91 percent of solvents. Compared with the prior art, the UV color change resistant environment-friendly dye paste has excellent UV color change resistant performance and weather resistance; the color change is slight after offset printing or long time placement; the excellent clearity is realized; the requirement of a front coloring composite paper board or a back coloring composite paper board can be met; safety and environment protection are realized; the quantity limitation requirements of the packaging industry, particularly the tobacco bale industry on heavy metal can be met.

Description

technical field [0001] The invention relates to a dye paste for coatings, in particular to an environmentally friendly anti-UV discoloration dye paste used in the field of outer packaging and a preparation method thereof. Background technique [0002] At present, transfer coatings are widely used on gold and silver cardboard for packaging of cigarettes, wine boxes, gifts, food, cosmetics, etc. due to their obvious cost and environmental advantages. In order to meet the appearance and color requirements of different orders, dye paste is often used for transfer In the field of coatings, with the increasingly higher health and safety requirements and environmental protection requirements, in order to prevent heavy metals from exceeding the standard, the use of heavy metal complex dyes has been greatly restricted, but the ensuing problem is the non-heavy metal complex dye slurry. The anti-UV discoloration ability is poor, which leads to the discoloration of jammed paper after pr...

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Problems solved by technology

[0002] At present, transfer coatings are widely used on gold and silver cardboard for packaging of cigarettes, wine boxes, gifts, food, cosmetics, etc. due to their obvious cost and environmental advantages. In order to meet the appearance and color requirements of different orders, dye paste is often used for transfer In the field of coatings, with the increasingly higher health and safety requirements and environmental protection requirements, in order to prevent heavy metals from exceeding the standard, the use of heavy metal complex dyes has been greatly restricted, but the ensuing problem is the non-heavy metal complex dye slurry. Poor anti-UV discoloration ability leads to discoloration of jammed paper after printing or long-term storage, thus greatly restricting the promotion and development of environmentally friendly dye paste

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