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A kind of screen printing ink for in-mold decoration and preparation method thereof

A technology of screen printing ink and in-mold decoration, applied in the field of printing materials, can solve the problems of low elongation rate, poor flexibility of the ink layer, easy ink flushing, etc., and achieve good high temperature and high humidity resistance, good tensile performance, good printability Effect

Active Publication Date: 2020-11-17
一可油墨涂料(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the synthetic materials of IMD printing substrates on the market are uneven, and the production process is adjusted at any time. However, these foreign or domestic IMD inks used in the market often have the following problems during use: ink layer flexibility Poor performance Too low elongation rate, ink layer not resistant to high temperature, easy to flush ink, poor adhesion with substrate layer, excessive ink smell and cause discomfort to human body, slow drying speed of wet film after printing, easy to stick to plate, printing suitability Poor surface leveling and poor surface leveling are prone to problems such as orange peel, so it is easy to lead to low product yield and poor production efficiency

Method used

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  • A kind of screen printing ink for in-mold decoration and preparation method thereof
  • A kind of screen printing ink for in-mold decoration and preparation method thereof
  • A kind of screen printing ink for in-mold decoration and preparation method thereof

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preparation example Construction

[0060] The specific embodiment part of the present invention also provides a method for preparing the above-mentioned screen printing ink for in-mold decoration, the method comprising the following steps:

[0061] (1) Mix high boiling point environment-friendly ester solvent, low boiling point environment-friendly ester solvent and tetramethylbenzene to obtain a mixed solvent, add saturated polyester resin and crystalline polyester resin to the mixed solvent, and mix to obtain a resin solution ;

[0062] (2) Add halogen-free environmental protection pigments, fillers and auxiliary agents to the resin solution obtained in step (1), mix, grind and disperse, and obtain semi-finished ink;

[0063] (3) adding defoamer to the semi-finished ink that step (2) obtains, obtains finished ink;

[0064] (4) Adding an isocyanate curing agent to the finished ink obtained in step (3) to obtain a screen printing ink.

[0065] In order to facilitate understanding of the present invention, the...

Embodiment 1

[0067] A preparation method of screen printing ink for in-mold decoration, said method comprising the following steps:

[0068] (1) 5g dibasic acid ester, 25g propylene glycol methyl ether propionate and 15g tetramethylbenzene are mixed, obtain mixed solvent, 35g saturated polyester resin (molecular weight 5000) and 5g crystalline polyester resin (molecular weight 25000) are added to In the mixed solvent, stir and mix at 800r / min for 6h to obtain a resin solution;

[0069] (2) in the resin solution that step (1) obtains, add 8g German Clariant halogen-free environment-friendly high-temperature-resistant pigments, 5g nano-calcium carbonate, 1g German BYK-163 dispersant and 0.5g fumed silica, at 800r / Stir and mix for 10 minutes at 10 minutes, grind and disperse to obtain semi-finished ink;

[0070] (3) Add 0.5g of organic silicon defoamer to the semi-finished ink obtained in step (2), and stir at 800r / min for 20min to obtain finished ink;

[0071] (4) Add 10 g of isocyanate c...

Embodiment 2

[0073] A preparation method of screen printing ink for in-mold decoration, said method comprising the following steps:

[0074] (1) 10g propylene glycol diacetate, 15g propylene glycol methyl ether acetate and 20g tetramethylbenzene are mixed to obtain a mixed solvent, and 30g saturated polyester resin (molecular weight 25000) and 10g crystalline polyester resin (molecular weight 10000) are added to the In the above mixed solvent, stir and mix at 1200r / min for 2h to obtain a resin solution;

[0075] (2) In the resin solution that step (1) obtains, add 6g BASF halogen-free environment-friendly temperature-resistant pigment, 5.5g nano calcium carbonate, 1.5g Taiwan super dispersant LY-785 and 1g fumed silica, under 600r / min Stir and mix for 20 minutes, grind and disperse to obtain semi-finished ink;

[0076] (3) Add 1g of organosilicon defoamer to the semi-finished ink obtained in step (2), and stir at 1200r / min for 15min to obtain finished ink;

[0077] (4) Add 20 g of isocya...

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Abstract

The invention relates to screen printing ink for in-mold decoration. The ink comprises a component A and a component B. The component A is prepared from, by mass, 5-10% of high-boiling-point environment-friendly ester solvent, 15-25% of low-boiling-point environment-friendly ester solvent, 15-20% of tetramethylbenzene, 30-35% of saturated polyester resin, 5-10% of crystalline polyester resin, 6-10% of halogen-free environment-friendly pigment, 5-10% of filler and 1.8-3.5% of assistant. The component B is an isocyanate ester curing agent. An ink layer of the ink is good in flexibility and high in stretch rate, the ink is subjected to high-temperature injection molding and not prone to ink rushing, the adhesive quality of the ink layer and a substrate is good, the ink is small in smell and free of poisons to the human body, a wet film obtained after printing is proper in drying speed and not prone to screen plugging or plate adhering, printability and leveling performance are good, and no orange peel phenomenon is generated.

Description

technical field [0001] The invention belongs to the field of printing materials and relates to an ink, in particular to a screen printing ink for in-mold decoration and a preparation method thereof. Background technique [0002] Traditional plastic decoration processing technology has gradually been unable to meet the needs of the new era. With the continuous emergence of light, thin, colorful and diverse consumer electronic products, and the country's increasing emphasis on environmental protection, IMD (In-Mold Decoration, In-mold decoration technology) technology came into being. [0003] The IMD process is to put the thermoplastic resin film (PC or PET, etc.) printed with a special IMD ink pattern in advance into a designated mold, heat and melt the molding resin (ABS or PC, etc.) A processing method in which the sheet material is integrated with the molding resin material. [0004] The IMD process has many advantages over other surface decoration processes, such as: (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/102C09D11/033C09D11/037C09D11/03
CPCC09D11/03C09D11/033C09D11/037C09D11/102
Inventor 鲁春风
Owner 一可油墨涂料(深圳)有限公司
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