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Thermal transfer PET film UV-curable varnish and preparation method thereof
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An ultraviolet light and thermal transfer technology, applied in the field of coatings, can solve the problems of poor surface hardness of the coating film, high requirements for film forming equipment, poor solvent resistance, etc., and achieve the effect of good adhesion
Active Publication Date: 2020-07-24
东周化学工业(昆山)有限公司
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Problems solved by technology
[0004] During preparation, the coating film needs to be baked at a low temperature for 1 to 2 minutes to dry and form a film. The requirements for film forming equipment are high, and the production efficiency is low, and the coating film obtained by rolling coating on PET film has many shortcomings, such as coating film The surface hardness is poor, and the solvent resistance is poor; moreover, the organic solvent content in the thermosetting coating is high, and the pollutant discharge is large during the preparation, which seriously affects the environment
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Embodiment 1
[0023] Embodiment 1: This embodiment provides a thermal transfer PET film UV-curable varnish, and the mass ratio of each raw material it includes is as follows:
[0024] 35% 6-functional urethane acrylate, 6-functional urethane acrylate can make the coating film have the advantages of fast response, good scratch resistance, good chemical resistance and good flexibility;
[0025] 10% 3-functional urethane acrylate, the combination of 3-functional urethane acrylate and 6-functional urethane acrylate can further increase the flexibility of the coating film;
[0026] Thermoplastic acrylic resin 20%, thermoplastic acrylic resin can reduce the curing shrinkage rate of the coating film, increase the adhesion of the coating film and the adhesion between the coating film layers, and improve the flexibility of the coating film;
[0027] Leveling aid 0.5%;
[0028] Organic solvent 29.5%;
[0029] Photoinitiator: 5%. The photoinitiator can cure the coating film with ultraviolet light ir...
Embodiment 2
[0030] Embodiment 2: This embodiment provides a thermal transfer PET film UV-curable varnish, the raw materials are the same as in Embodiment 1, and the mass percentages of the raw materials are: 50% of 6-functional urethane acrylate, 5% of 3-functional urethane acrylate, Thermoplastic acrylic resin 10%, leveling aid 0.5%, organic solvent 24.5%, photoinitiator: 10%.
Embodiment 3
[0031] Embodiment 3: This embodiment provides a thermal transfer PET film UV-curable varnish, the raw materials are the same as in Embodiment 1, and the mass percentages of the raw materials are: 40% of 6-functional urethane acrylate, 5% of 3-functional urethane acrylate, Thermoplastic acrylic resin 20%, leveling aid 0.5%, organic solvent 29.5%, photoinitiator: 5%.
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Abstract
The invention provides a heat-transfer-printing PET film ultraviolet-curing varnish and a preparation method thereof. The varnish comprises the following components in percentage by mass: 35-50% of hexafunctional polyurethane acrylate, 5-10% of trifunctional polyurethane acrylate, 10-20% of thermoplastic acrylic resin, 0.5-1% of leveling agent, 20-30% of organic solvent and 5-10% of photoinitiator. According to the heat-transfer-printing PET film ultraviolet-curing varnish, the paint film has the advantages of favorable adhesive force, high surface hardness, favorable scratch resistance of the surface, and favorable chemical resistance. The cured paint film has favorable flexibility, and can not crack even after being bent by 90 degrees. In the preparation method, the mild and nontoxic organic solvent is utilized, and has the advantages of small out-emission amount and no environment pollution; the heat-transfer-printing PET film ultraviolet-curing varnish is used instead of the traditional thermocuring transfer printing paint; when the heat-transfer-printing PET film ultraviolet-curing varnish is in use, the paint film can become dry and form a film after being irradiated by ultraviolet light for 10-20 seconds, and thus, the method has the advantages of higher production efficiency, simple film-forming technique, low requirements for film-forming equipment and energy saving, and further lowers the cost.
Description
technical field [0001] The invention relates to the field of coatings, in particular to an ultraviolet light curing varnish for heat transfer printing PET film. Background technique [0002] In the prior art, thermal transfer ink is mainly made of dyes with special properties to print patterns, characters, etc. on special paper or film, which can be transferred to other substrates due to heating. Among them, the thermal transfer PET film coating refers to coating the coating on the PET film first, and using the PET film as the transfer medium to heat transfer the coating to other substrates. [0003] The coatings in the current thermal transfer PET film technology are mostly thermosetting coatings. Thermosetting coatings refer to coatings that use thermosetting resins as the main film-forming substance. Insoluble and infusible body-shaped polymer network structure. [0004] During preparation, the coating film needs to be baked at a low temperature for 1 to 2 minutes to dr...
Claims
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