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Water-based PET (polyethylene terephthalate) undercoat paint, and preparation method and application thereof

A water-based and coating technology, applied in the direction of polyester coatings, coatings, etc., can solve the problems of poor adhesion of UV light-cured inks, and achieve the effect of easy industrial production, safe manufacturing and use, and high adhesion

Inactive Publication Date: 2013-11-27
广东新供销天保再生资源集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of poor adhesion of UV photocurable inks on PET films, and to provide a water-based PET primer that is safe to use and easy to process.

Method used

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  • Water-based PET (polyethylene terephthalate) undercoat paint, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0047] The water-based PET primers of Examples 1-3 include the components and parts by weight shown in Table 1. Its preparation method comprises the following steps:

[0048] A. Put the co-solvent and deionized water into the reaction kettle, and stir under the control dispersion speed of 300r / min;

[0049] B. Control the dispersion speed to 500r / min, add water-based polyester resin, stir for 20 minutes to make the water-based polyester resin mix evenly, and finally add defoamer to disperse evenly, and then get water-based PET primer.

[0050] The application of the water-based PET primer of the present embodiment is as follows:

[0051]The obtained water-based PET primer is coated on the PET film with a 200-mesh steel roller, dried continuously at a temperature of 120-130° C. for 13-15 seconds, and then coated with UV light-curable ink. After testing, when the water-based PET primer is not pre-coated, the UV light-curable ink printed on the PET c...

Embodiment 4

[0053] The water-based PET primer in Example 4 includes the components and parts by weight shown in Table 1. Its preparation method comprises the following steps:

[0054] A. Put the wetting agent, co-solvent, and deionized water into the reaction kettle, and control the dispersion speed to 300r / min and stir for 10min;

[0055] B. Control the dispersion speed to 500r / min, add water-based polyester resin, anti-sticking agent, and defoamer, and stir for 20 minutes to mix the water-based polyester resin evenly to obtain a water-based PET primer.

[0056] The application of the water-based PET primer of the present embodiment is as follows:

[0057] The obtained water-based PET primer is coated on the PET film with a 200-mesh steel roller, dried continuously at a temperature of 115-125° C. for 13-15 seconds, and then coated with UV light-curable ink. After testing, when the water-based PET primer is not pre-coated, the UV light-curable ink printed on the PET...

Embodiment 5

[0059] The water-based PET primer in Example 5 includes the components and parts by weight shown in Table 1. Its preparation method comprises the following steps:

[0060] A. Put the catalyst, wetting agent and co-solvent into the reaction kettle, control the dispersion speed to 300r / min and stir for 5 minutes, add curing agent and deionized water, and control the dispersion speed to 500r / min and stir for 10 minutes;

[0061] B. Keep the dispersion speed at 500r / min, add water-based polyester resin, stir for 30 minutes to mix the water-based polyester resin evenly, finally add defoamer, and then disperse at 500r / min for 10 minutes to obtain water-based PET primer.

[0062] The application of the water-based PET primer of the present embodiment is as follows:

[0063] The obtained water-based PET primer is coated on the PET film with a 220-mesh steel roller, dried continuously at a temperature of 105-115° C. for 12-15 seconds, and then coated with UV light...

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Abstract

The invention relates to a water-based PET (polyethylene terephthalate) undercoat paint for an UV (ultraviolet) photocuring ink undercoat, and a preparation method and application thereof. Every 100 parts by weight of paint comprises the following components in parts by weight: 40-75 parts of water-based polyester resin, 3-15 parts of cosolvent, 5-57 parts of deionized water and 0.1-0.5 part of defoamer. The product provided by the invention is low in volatile organic compound (VOC) content, and thus, is green and environment-friendly; and the manufacturing and use process is safe. The water-based polyester resin has favorable adhesive force with the PET film; and thus, when the surface tension of the PET film is greater than 40 dyne, the paint formula even does not need any curing agent or catalyst component, so that the required baking time of the paint is shorter, thereby obtaining higher production efficiency. The product provided by the invention has the advantages of high drying speed, no need of UV curing after being dried, simple production technique and high production efficiency.

Description

technical field [0001] The invention belongs to the field of water-based paint, and in particular relates to a water-based PET primer and a preparation method and application thereof. Background technique [0002] UV light-curing printing has high color saturation and high gloss of printed products, especially in high-end product packaging. However, when printing on a non-absorbing substrate such as PET, the adhesion of UV photocurable ink is low, and deinking is prone to occur. [0003] Corona treatment and primer treatment are currently the two most commonly used methods for increasing the adhesion of UV light-curable inks on PET plastics. Corona treatment has the disadvantages of poor stability and huge investment, and is suitable for continuous production processes. The primer treatment has good stability, the surface tension of the treated PET film is not affected by time, and the cost is low, no special equipment and process are required, and the application r...

Claims

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Application Information

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IPC IPC(8): C09D167/00C09D7/12C08J7/04C08L67/02
Inventor 吴锐
Owner 广东新供销天保再生资源集团有限公司
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