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Waterproof back coating material as well as preparation method and use method thereof

A back-coating, water-based technology, applied in the direction of paper coating, coating, water-repellent addition, etc., can solve the problem of inability to reduce humidity, and achieve the effect of simple preparation method, good film formation, and fast drying speed

Inactive Publication Date: 2019-01-18
云南九九彩印有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The production area of ​​the stamping workshop is equipped with a humidification device. When the humidity in the production environment is not enough, it can be moderately increased by turning on the humidifier. However, when the humidity is too high, such as the rainy season, the humidity outside the workshop itself is relatively low. It is relatively high, and ventilation methods such as opening windows and doors cannot reduce humidity
The workshop currently has no effective solution to the problem of bending and winding of products that have completed the post-press processing process after absorbing moisture. When the humidification is not turned on), the die-cut small sheet product will quickly absorb water in a short period of time after getting off the machine, and it will be bent and rolled up

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0035] The preparation method of the waterproof back coating material of the present invention is to pour the water-based non-film-forming emulsion and the water-based film-forming emulsion of the formula ratio into a dispersing mixer equipped with water, and after the dispersion is uniform, add water-based co-solvent and water-based additives successively, Stir continuously for another 40-60 minutes. After testing all the indicators are qualified, filter and pack to obtain the waterproof back coating material.

[0036] The using method of waterproof back coating material of the present invention comprises the following steps:

[0037] 1) The pretreatment steps are: prepare a dilution solvent, mix it with the waterproof back coating material, adjust the concentration of the back coating to a suitable viscosity on the machine, so that the dry coating amount per unit area is 0.5~5g / m 2 ;

[0038] 2) Back coating: Back coating treatment is carried out on the back of the inner li...

Embodiment 1

[0045] A waterproof backcoat material comprising the following components by weight:

[0046] Aqueous non-film-forming emulsion: 20 parts;

[0047] Aqueous film-forming emulsion: 10 parts;

[0048] Water-based co-solvent: 5 parts;

[0049] Water-based additives: 0.3 parts;

[0050] Water: 10 parts.

[0051] The aqueous non-film-forming emulsion is a non-film-forming aqueous styrene-acrylic emulsion. The aqueous film-forming emulsion is a film-forming aqueous styrene-acrylic emulsion. The aqueous co-solvent is 95% ethanol. The water-based additive is a silicone defoamer. The water is deionized water.

[0052] A preparation method of the above-mentioned waterproof back coating material, specifically: pour the water-based non-film-forming emulsion and the water-based film-forming emulsion in the proportion of the formula into the dispersing mixer equipped with water, and after the dispersion is uniform, add the water-based co-solvent in sequence , water-based additives, a...

Embodiment 2

[0059] A waterproof backcoat material comprising the following components by weight:

[0060] Aqueous non-film-forming emulsion: 65 parts;

[0061] Aqueous film-forming emulsion: 25 parts;

[0062] Water-based co-solvent: 18 parts;

[0063] Water-based additive: 1 part;

[0064] Water: 25 parts.

[0065] The water-based non-film-forming emulsion is non-film-forming water-based styrene-acrylic emulsion and water-based pure acrylic emulsion. The water-based film-forming emulsion is film-forming water-based acetic acid acrylic resin and water-based polyurethane resin. The aqueous co-solvent is 95% ethanol. The water-based additive is a silicone defoamer. The water is deionized water.

[0066] A method for preparing the above-mentioned waterproof back coating material, specifically: pour the water-based non-film-forming emulsion and the water-based film-forming emulsion in the proportion of the formula into a dispersing mixer equipped with water, and after the dispersion is u...

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PUM

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Abstract

The invention discloses a waterproof back coating material as well as a preparation method and use method thereof. The waterproof back coating material is prepared from the following components: 20 to65 parts of aqueous non-film-forming emulsion; 10 to 25 parts of aqueous film-forming emulsion; 5 to 18 parts of an aqueous cosolvent; 0.3 to 1 part of an aqueous additive and 10 to 25 parts of water. The back coating material disclosed by the invention is scientific in proportioning; the preparation method is simple; the waterproof back coating material can be effectively applied to warping prevention of paper; when a die cutting procedure maintains a flat pressing production mode, after back coating is performed in a printing procedure, the problem of bending deformation of a product can bethoroughly solved. After being treated by the waterproof back coating material, an obtained paper product can adapt to environmental humidity of 70 percent to the maximum extent and cannot be bent and warped, so that disqualified products are effectively eliminated.

Description

technical field [0001] The invention belongs to the technical field of paper warping prevention, and in particular relates to a waterproof back coating material and a preparation method and application method thereof. Background technique [0002] The production area of ​​the stamping workshop is equipped with a humidification device. When the humidity in the production environment is not enough, it can be moderately increased by turning on the humidifier. However, when the humidity is too high, such as the rainy season, the humidity outside the workshop itself is relatively low. It is relatively high, and ventilation methods such as opening windows and doors cannot reduce humidity. The workshop currently has no effective solution to the problem of bending and winding of products that have completed the post-press processing process after absorbing moisture. When the humidification is not turned on, the die-cut small sheet product absorbs water rapidly after getting off the...

Claims

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Application Information

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IPC IPC(8): D21H21/16D21H19/14D21H19/20D21H19/24D21H21/12
CPCD21H19/14D21H19/20D21H19/24D21H21/12D21H21/16
Inventor 王术兵刘世昌况金贵
Owner 云南九九彩印有限公司