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Coating for parper making surface finishing

A coating and topcoating technology, applied in paper coatings, papermaking, textiles and papermaking, etc., can solve the problems of poor ink absorption, increased production cost, reduced whiteness, etc. The effect of fluffy structure

Inactive Publication Date: 2005-11-09
SHANGHAI DONGSHENG NEW MATERIALS
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Problems solved by technology

[0002] At present, most of the coatings used in the market for paper-making surface coating are heavy calcium carbonate and washed kaolin. Among them, the crystal shape of heavy calcium carbonate is irregular. If the amount is too large, the gloss of the coated paper will be low, the paper surface will be rough, and the ink absorption will be poor. Although kaolin has a fine particle size, it can improve the gloss of paper surface, but its whiteness is low. If the amount is too large, the whiteness of paper will be reduced, and the price is high, which will increase the production cost of paper.

Method used

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  • Coating for parper making surface finishing
  • Coating for parper making surface finishing
  • Coating for parper making surface finishing

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Embodiment Construction

[0006] The present invention is further described and examples are given below.

[0007] The present invention is a paint for papermaking surface coating, characterized in that: the composition and weight percentage of the paint are: 30-55% of light calcium carbonate, 5-10% of kaolin, and 0.1% of water-resistant agent -0.5%, the latex is 0.5-6%, and the balance is water; the components and weight percentages of the coating described in the specific implementation are: light calcium carbonate is 30-45%, heavy calcium carbonate is 1-10%, The content of kaolin is 5-10%, the anti-water agent is 0.1-0.5%, the latex is 0.5-6%, and the balance is water; the kaolin includes washed kaolin and calcined clay, and the washed kaolin accounts for 70-85% by weight of the kaolin, and the calcined The clay accounts for 15-30% by weight of the kaolin, the water-resistant agent is polyurea-formaldehyde resin, and the latex is generally commercially available latex.

[0008] In the following, li...

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Abstract

The invention discloses a coating used in paper top-coat. Its components (wt%): lightweight calcium carbonate 30-55%, kaoline 5-10%, water repellent agent 0.1-0.5%, latex 0.5-6%, and the rest water. It adopts depositing method to make high-whiteness, high-hiding property lightweight calcium carbonate. It can also be used as coating pigment to coat the paper, partly replacing heavyweight calcium carbonate and water washing kaoline and improve the physical indexes of the paper such as whiteness, printing ink absorbency, and printing glossiness, and largely reducing the production cost.

Description

Technical field: [0001] The invention belongs to the technical field of coatings, and in particular relates to a coating used for papermaking surface coating. Background technique: [0002] At present, most of the coatings used in the market for paper-making surface coating are heavy calcium carbonate and washed kaolin. Among them, the crystal shape of heavy calcium carbonate is irregular. If the amount is too large, the gloss of the coated paper will be low, the paper surface will be rough, and the ink absorption will be poor. Although kaolin has a fine particle size and can improve the glossiness of the paper surface, its whiteness is low. If the amount is too large, the whiteness of the paper will be reduced, and the price is high, which will increase the production cost of the paper. Invention content: [0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a coating for papermaking top coating. [0004] The technical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00D21H19/10
Inventor 郑小群
Owner SHANGHAI DONGSHENG NEW MATERIALS
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