High-glossiness coating, high-glossiness paper and preparation method thereof

A coating and high-gloss technology, used in paper coatings, coatings, papermaking, etc., can solve the problems of high-gloss paint waste, failure to achieve, and uneven gloss of high-gloss paper, and achieve the effect of reducing the coating amount and simplifying the synthesis method.

Active Publication Date: 2019-01-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the existing technologies for preparing high-gloss paper directly add the high-gloss coating to the slurry and mix it for papermaking, or directly mix it with the slurry according to the mass percentage. Insufficient, the obtained high-gloss paper has different gloss, and the gloss does not meet the requirements of the process, etc.
However, through the redesign of the process, the high-gloss paint is directly applied to the surface of the paper, and there are problems such as a large waste of high-gloss paint.
Both of the above two processes for preparing high-gloss paper fail to meet the requirements of preparing a kind of economical high-gloss coating, and at the same time, the gloss of high-gloss paper is uniform and the color is high.

Method used

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  • High-glossiness coating, high-glossiness paper and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a high-gloss paper and its preparation method, the preparation steps are as follows:

[0038] (1) Papermaking

[0039] Get 100g of dry coniferous wood pulp board and soak, defrost, beating to 17 ° SR, add 0.5g polyamide polyamine-epichlorohydrin resin (PAE), 0.01g nanocellulose, 0.5g carboxylate to the obtained raw pulp Methyl cellulose, 0.2g cationic starch, 1.0g light calcium carbonate, stir and mix to obtain mixed pulp; take mixed pulp by 0.6g dry pulp and carry out papermaking (quantitative 30g / m 2 ).

[0040] (2) Sizing

[0041] Carry out surface sizing to the paper that step (1) obtains with styrene-butadiene latex, and the surface sizing amount is 2g / m 2 , Calendering treatment after drying, the calendering line pressure is 45kN / m.

[0042] (3) Preparation of pre-coating paint and high-gloss paint

[0043] Pre-coating paint (mass percentage): 40% of kaolin, 5% of nanocellulose + polyvinyl alcohol, 2% of polyoxyethylene polyoxypropyle...

Embodiment 2

[0050] This embodiment provides a high-gloss paper and its preparation method, the preparation steps are as follows:

[0051] (1) Papermaking

[0052] Take 100g of dry broad-leaved wood pulp board and soak, thaw, and beat to 17 ° SR, add 0.5g melamine formaldehyde resin, 0.01g nanocellulose, 0.5g carboxymethyl cellulose, 0.2g cationic starch to the obtained raw pulp , 1.0g light calcium carbonate, stir and mix to obtain mixed pulp; take mixed pulp by 0.6g dry pulp and carry out papermaking (quantitative 30g / m 2 ).

[0053] (2) Sizing treatment

[0054] Carry out surface sizing to the paper that step (1) obtains with styrene-butadiene latex, and the surface sizing amount is 2g / m 2 , Calendering treatment after drying, the calendering line pressure is 45kN / m.

[0055] (3) Preparation of pre-coating paint and high-gloss paint

[0056] Pre-coating paint (mass percentage): 50% of kaolin, 10% of nanocellulose + polyvinyl alcohol, 2% of polyoxyethylene polyoxypropylene block cop...

Embodiment 3

[0063] This embodiment provides a high-gloss paper and its preparation method, the preparation steps are as follows:

[0064] (1) Papermaking

[0065] Take 50g of dry coniferous wood pulp board and 50g of dry hardwood pulp board and carry out mixed soaking, thawing, and beating to 17°SR, and add 0.5g of urea-formaldehyde resin, 0.01g of nanocellulose, and 0.5g of carboxymethyl to the obtained raw pulp Base cellulose, 0.2g cationic starch, 1.0g light calcium carbonate, stir and mix to obtain mixed pulp; take mixed pulp by 0.6g dry pulp and carry out papermaking (quantitative 30g / m 2 ).

[0066] (2) Sizing treatment

[0067] Carry out surface sizing to the paper that step (1) obtains with styrene-butadiene latex, and the surface sizing amount is 2g / m 2 , Calendering treatment after drying, the calendering line pressure is 45kN / m.

[0068] (3) Preparation of pre-coating paint and high-gloss paint

[0069] Pre-coating paint (mass percentage): 60% of kaolin, 5% of nanocellulos...

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Abstract

The invention belongs to the field of functional materials and specifically discloses a high-glossiness coating, a high-glossiness paper and a preparation method thereof. The high-glossiness coating contains kaolin, titanium dioxide, polysiloxane, adhesive, nano-crystalline cellulose, polyvinyl alcohol, a defined amount of de-foaming agent and other auxiliaries. The preparation method for the high-glossiness paper comprises the following steps: gluing the surface of a paper sheet and then coating a pre-coating material and the high-glossiness coating, in the manner of using the pre-coating material composed of components, such as kaolin, for pre-coating, and then adopting the high-glossiness coating compounded on the basis of the formula for performing knife coating, thereby acquiring thehigh-glossiness paper with high glossiness. According to the invention, the raw paper is pre-coated with the pre-coating material containing kaolin, and then the knife coating of the high-glossiness coating is performed, so that the coating volume of the high-glossiness coating (titanium dioxide) is greatly reduced. The high-glossiness coating is coated after the raw paper is glued in advance, sothat the glossiness of the high-glossiness paper can be effectively promoted.

Description

technical field [0001] The invention belongs to the field of functional materials, and in particular relates to a high-gloss coating, a high-gloss paper material and a preparation method thereof. Background technique [0002] At present, most of the existing technologies for preparing high-gloss paper directly add the high-gloss coating to the slurry and mix it for papermaking, or directly mix it with the slurry according to the mass percentage. Insufficient, the obtained high-gloss paper has different gloss, and the gloss does not meet the requirements of the process. However, through the redesign of the process, the high-gloss paint is directly applied to the surface of the paper sheet, and there are problems such as a large waste of the high-gloss paint. Both of the above two processes for preparing high-gloss paper fail to meet the requirements of preparing a kind of economical high-gloss coating, and at the same time, the high-gloss paper has uniform gloss and high glo...

Claims

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Application Information

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IPC IPC(8): D21H19/40D21H19/38D21H19/62D21H19/58D21H19/52D21H19/60D21H21/14
CPCD21H19/38D21H19/40D21H19/52D21H19/58D21H19/60D21H19/62D21H21/14
Inventor 杨仁党陈通马千里
Owner SOUTH CHINA UNIV OF TECH
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