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Coating paper and manufacturing method thereof

A production method and technology for coated paper, applied in the field of papermaking, can solve the problems of layer deformation of coated paper, reduction of aluminum film smoothness and high brightness, etc.

Active Publication Date: 2012-12-19
GOLD EAST PAPER JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When sizing the aluminum film, there is a lot of water in the glue. When the aluminum film is combined with the coated paper, the water in the glue will pass through the coating and enter the fibers in the base paper layer. The fibers absorb water and then swell. In the subsequent drying process, the arrangement of the fibers will be distorted to varying degrees, which will lead to the deformation of the coated paper layer, and then feed back to the surface of the aluminum-coated paper, resulting in a reduction in the smoothness and high brightness of the aluminum film.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepare pulp from hardwood pulp (LBKP) and softwood pulp (NBKP) at a weight ratio of NBKP:LBKP=15:85, and use the pulp to make base paper to obtain a base paper layer.

[0027] Take an appropriate amount of oxidized sizing starch and a surface sizing agent of 15% of the dry weight of the oxidized sizing starch, wherein the surface sizing agent is an anionic styrene-acrylate copolymer and polyvinyl alcohol with a mass ratio of 15:85 The mixture, the surface sizing agent is prepared into a mixed emulsion and mixed with the oxidized sizing starch to sizing the base paper layer; the contact angle of the base paper layer after sizing is 85 degrees.

[0028] Pigment, starch and styrene butadiene acrylonitrile latex are 100: 5: 6.5 by mass ratio, add water and be formulated into the coating solution with solid content of 67%, and coat on the base paper layer 10 of 70g / m2, coat The amount is 11g / m 2 / noodle. Wherein the pigment proportion is heavy calcium carbonate: light cal...

Embodiment 2

[0031] The hardwood pulp (LBKP) and the softwood pulp (NBKP) are prepared into pulp at a weight ratio of NBKP:LBKP=10:90, and the pulp is used for base paper making to obtain a base paper layer.

[0032]Take an appropriate amount of oxidized sizing starch and a surface sizing agent of 20% dry weight of the oxidized sizing starch, wherein the surface sizing agent is an anionic styrene-acrylate copolymer and polyvinyl alcohol with a mass ratio of 35:65 The mixture, the surface sizing agent is prepared into a mixed emulsion and mixed with the oxidized sizing starch to sizing the base paper layer; the contact angle of the base paper layer after sizing is 90 degrees.

[0033] Pigment, starch and styrene butadiene acrylonitrile latex are 100: 5: 6.5 by mass ratio, add water and be mixed with solid content at 67% coating solution, coat on the base paper layer 10 of 70g / m2, coat The amount is 11g / m 2 / noodle. Wherein the pigment proportion is heavy calcium carbonate: light calcium c...

Embodiment 3

[0036] Prepare pulp from hardwood pulp (LBKP) and softwood pulp (NBKP) at a weight ratio of NBKP:LBKP=5:95, and use the pulp to make base paper to obtain a base paper layer.

[0037] Take an appropriate amount of oxidized sizing starch and a surface sizing agent of 25% of the dry weight of the oxidized sizing starch, wherein the surface sizing agent is an anionic styrene-acrylate copolymer and polyvinyl alcohol with a mass ratio of 45:55 The mixture, the surface sizing agent is prepared into a mixed emulsion and mixed with the oxidized sizing starch to sizing the base paper layer; the contact angle of the base paper layer after sizing is 88 degrees.

[0038] Pigment, starch and styrene butadiene acrylonitrile latex are 100: 5: 6.5 by mass ratio, add water and be mixed with solid content at 67% coating solution, coat on the base paper layer 10 of 70g / m2, coat The amount is 11g / m 2 / noodle. Wherein the pigment proportion is heavy calcium carbonate: light calcium carbonate=40:6...

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Abstract

The invention relates to coating paper. The coating paper comprises a raw paper layer, a sizing layer and a coating layer, wherein the sizing layer is located between the coating layer and the raw paper layer and mainly comprises oxidized sizing starch and a surface sizing agent accounting for 15-20% of the oxidized sizing starch by dry mass, and the surface sizing agent is a mixture of an anionic styrene-acrylate copolymer and polyvinyl alcohol, wherein the mass ratio of the anionic styrene-acrylate copolymer to the polyvinyl alcohol is (15-45):(85-55), and the sizing layer ensures that a contact angle of the raw paper layer and water is 85-95 degrees. Since the sizing layer of the coating paper is prepared from a mixed emulsion of the oxidized sizing starch, the anionic styrene-acrylatecopolymer and the polyvinyl alcohol, the sizing layer can ensure that all or most of moisture does not permeate into fiber of the raw paper layer when the coating paper contacts the moisture, and thus, the coating paper is kept not deform. The invention also provides a production method of the coating paper.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a deformation-preventable coated paper and a production method thereof. Background technique [0002] Coated paper includes a base paper layer and a coating applied on the base paper layer. Coated paper has good optical properties and printing performance, so it is widely used in the fields of printed matter printing, cloth transfer printing, and aluminum film transfer of aluminum-coated paper. [0003] Coated paper is often exposed to water when it is applied. At this time, the fibers in the base paper layer of the coated paper absorb water and swell, and the arrangement of the fibers will be distorted to varying degrees, which will lead to deformation of the coated paper, and eventually lead to The resulting product of the coated paper yielded defective products. [0004] For example, when coated paper is applied to the aluminum film transfer of aluminum-coated paper, the aluminum ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/16
Inventor 胡华雷王仁荣张明
Owner GOLD EAST PAPER JIANGSU