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Preparation method of waterproof printing polishing oil for paper presswork

A printing and varnish technology, which is applied in papermaking, paper coating, textiles and papermaking, etc. It can solve the problems that the waterproofness of varnishes cannot meet people's requirements, the waterproof performance is not enough to replace, and the preparation process is complicated, etc., to achieve waterproof Improved performance, stable product performance, and simple operation

Inactive Publication Date: 2011-08-17
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current varnish does not meet people's requirements in water resistance.
After searching the literature of the prior art, it was found that "a new type of glazing oil with high gloss, high anti-blocking and wear resistance" (public number: CN101798776A) invented by Sun Fuxia et al. - The varnish prepared mainly from silicone copolymer emulsion, although its water resistance is better than ordinary polyacrylic varnish, but the preparation process of benzene-acrylic-organic silicon copolymer emulsion with core-shell structure is complicated, the cost is high, and it is waterproof Still not good enough to replace plastic overlays

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The first step: Acrylic resin solution (long-resistant 362U, Rhodia company) 200g, acrylic resin emulsion ( AC-261, Rohm and Haas Company) 500g, defoamer 10g, leveling agent 10g, isopropanol 100g, and water 180g are mixed evenly, prepare common varnish;

[0015] Step 2: Add 100 g of silicone oil emulsion (349, Dow Corning Company) and 100 g of wax emulsion (MD2000, Wengkel Company) to 1000 g of the above-mentioned varnish, and mix well to prepare a waterproof printing varnish.

[0016] The ordinary glazing oil obtained in the first step in this example, under the condition of gravure printing on-line glazing, its paper printed matter will produce obvious soaking damage after 1 hour of direct contact with water; and after the first and second steps, this In the example, the final product obtained under the condition of gravure printing on-line glazing can guarantee that the paper printed matter will not be damaged by wetting when it is in direct contact with water for m...

Embodiment 2

[0018] The first step: the same as the first step described in Example 1;

[0019] The second step: take the 880g glazing oil prepared in the first step, add 20g of silicone oil emulsion (349, Dow Corning Company) and 100g of wax emulsion (MD2000, Wengkaier Company) to it, and prepare waterproof printing glazing after mixing evenly Oil.

[0020] Under the condition of gravure printing on-line glazing, the obtained product can guarantee that the paper printed matter will not be damaged by soaking in direct contact with water for more than 12 hours.

Embodiment 3

[0022] Take 890g of ordinary glazing oil prepared by Shanghai Gaobang Printing Materials Co., Ltd., add 100g of silicone oil emulsion (E37, Wacker Company) and 10g of wax emulsion (MD2000, Wengkaier Company) to it, and prepare a waterproof printing surface after mixing evenly. Varnish.

[0023] Under the condition of gravure printing on-line glazing, the obtained product can guarantee that the paper printed matter will not be damaged by soaking in direct contact with water for more than 8 hours.

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Abstract

The invention discloses a preparation method of waterproof printing polishing oil for paper presswork. Common polishing oil is prepared by mixing acrylic resin solution, acrylic resin emulsion, anti-foaming agent, flatting agent, isopropanol and water uniformly in a ratio. The method is characterized in that: silicone oil emulsion in an amount which is 2 to 10 percent of the total mass of the polishing oil and wax emulsion in an amount which is 1 to 10 percent of the total mass of the polishing oil are added into the common polishing oil, and the silicone oil emulsion, the wax emulsion and the common polishing oil are stirred uniformly. The silicone oil emulsion is oil-in-water emulsion prepared from polysiloxane, surfactant and water. The wax emulsion is oil-in-water emulsion prepared from natural wax and / or synthetic wax, surfactant and water. The damage of water to the ink and the paper of the inner layer can be effectively prevented, the operation is simple, the performance of the polishing oil is stable, the polishing oil has ultrahigh waterproof property, the polishing oil is applied to the outermost layer of the presswork by online coating of a printer or offline coating of a polishing machine, and the presswork directly contacted with the water for over 8 hours is not damaged by wetting.

Description

technical field [0001] The invention relates to a preparation method of waterproof printing varnish for paper printed matter. Background technique [0002] At present, the main material used for commodity packaging is still paper products, including paper, cardboard, and cartons. Compared with other materials such as plastic, paper printed matter has many excellent characteristics such as cheap and easy to obtain, easy to print, and green and environmental protection. However, the disadvantage of poor water resistance also greatly limits the application of paper prints in many fields. Especially those occasions that are easy to contact with water. In order to prevent the paper-packaged products from being damaged by water, people adopt two methods, that is, to coat the outer surface of the paper-based product packaging with plastic film or to apply varnish on the outer surface of the paper-based product packaging through online or independent printing. , in order to prote...

Claims

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Application Information

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IPC IPC(8): D21H21/14D21H19/20D21H19/32D21H19/18
Inventor 邓开发倪静雪董翠芳刘欣邓文骏
Owner UNIV OF SHANGHAI FOR SCI & TECH
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