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Coating with high speed and solid content

A high-solids, high-speed technology, applied in the direction of coating, can solve the problems of narrow coating width and low coating speed, and achieve the effect of improving paper quality, reducing energy consumption and outstanding effect.

Inactive Publication Date: 2009-09-23
GOLD EAST PAPER JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some large-scale coated paper production enterprises at home and abroad have a stable maximum speed of about 1700m / min, but their coating solid content is difficult to break through the level of 63-66%. Narrow coating width and low coating speed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A high speed and high solid content coating according to the present invention, the main body of the coating is heavy calcium carbonate and light calcium carbonate; the ratios are 82 and 18 respectively. At the same time, 10.5 parts by weight of latex was added, and the thickener accounted for 0.37 parts by weight of the total pigment, and the ratio was 100:80. The auxiliary additives are polyacrylic acid salt as dispersant, accounting for 0.10 parts by weight of the total amount, PAPU type as wet strength agent, accounting for 0.50 parts by weight of the total amount, and defoamer accounting for 0.05 parts by weight of the total amount. The solid content of the paint is 70%, the low-shear viscosity is about 1350cps measured by Brookfield DV-II+Viscometer, and the pH is adjusted to 9.0-9.5 by adding sodium hydroxide.

[0018] The high-solid coating formula is used to coat on a coating machine with a width of 9.7m and a scraper, and the coating amount is 10-12g / m 2 When...

Embodiment 2

[0021] A high speed and high solid content coating according to the present invention, the main body of the coating is heavy calcium carbonate, light calcium carbonate, and kaolin; the ratios are 70, 15, and 15 respectively. At the same time, a total amount of 11.0 parts by weight of latex is added, the thickener accounts for 0.20 parts by weight of the total amount, and the proportion is 100:0. Auxiliary additives are that the dispersant is selected from polyacrylate, accounting for 0.15 parts by weight of the total amount of pigments, the wet strength agent is selected from PAPU type, accounting for 0.80 parts by weight of the total amount of pigments, and the defoamer accounts for 0.10 parts by weight of the total amount of pigments. The solid content of the paint is 69.0%, the low-shear viscosity is about 1500cps measured by Brookfield DV-II+Viscometer, and the pH is adjusted to 8.5-9.0 by adding sodium hydroxide.

[0022] Adopt the high-solid paint formula to be coated on...

Embodiment 3

[0025] A kind of high vehicle speed high solid content paint of the present invention, paint main body is made of heavy calcium carbonate, light calcium carbonate, and its ratio is 95,5 respectively. At the same time, 9.6 parts by weight of latex were added, 0.4 parts by weight of polyvinyl alcohol was added, and 0.10 parts by weight of thickener was added, with a ratio of 50:50. The auxiliary additives are polyacrylic acid salt as dispersant, accounting for 0.10 parts by weight of the total amount, PAPU type as wet strength agent, accounting for 0.10 parts by weight of the total amount, and defoamer accounting for 0.15 parts by weight of the total amount. The solid content of the paint is 70.5%, the low-shear viscosity is about 950cps measured by BrookfieldDV-II+Viscometer, and the pH is adjusted to 9.0-9.5 by adding sodium hydroxide.

[0026] Use the high-solid coating to coat on a coating machine with a width of 9.7m and a scraper, and the coating amount is 11-13g / m 2 When...

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Abstract

The invention discloses a coating with high speed and solid content, comprising heavy calcium carbonate, light calcium carbonate, kaolin pigment, polyvinyl alcohol, latex and thickening agents, wherein the solid content is in the range of 69-71 percent, and the pH value is 8.5-10; the coating includes the following components according to the parts by weight: 65-100 of heavy calcium carbonate, 5-100 of light calcium carbonate, 0-15 of kaolin pigment, 0.1-0.6 of polyvinyl alcohol, 9-11.5 of latex and 0.1-0.55 of thickening agents. The invention effectively reduces the high shearing resistance of the coating with high solid content and can satisfy higher coating speed and relatively lower coating quantity by a scraper. The coating integrally uses the theories of surface chemistry and hydromechanics of coating, the particle encapsulation of coating suspension, and the like, and has a certain performance-required rheological property and viscous modulus. The invention is applied to coating machines, obviously reduces the cost of paper per ton and greatly improves the quality of finished paper.

Description

1. Technical field [0001] The invention belongs to the technical field of coated paper production, in particular to a coating with high vehicle speed and high solid content. 2. Background technology [0002] Coatings with petrochemical products as the main raw materials, under the influence of factors such as record high international oil prices, tight supply of goods in the market, and rising prices of aromatic hydrocarbons outside the market, face the impact of policies such as the reduction of export tax rebates and changes in the RMB exchange rate when the cost rises. Factors such as the impact of the impact, the pressure of rising costs brought about by the sharp increase in the CPI index, and the further intensification of the diversified competition pattern have put forward higher requirements for domestic paper-making enterprises. [0003] In this context, coated paper manufacturers have explored ways to improve production efficiency, reduce energy consumption, and d...

Claims

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Application Information

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IPC IPC(8): C09D1/00
Inventor 王仁荣张明
Owner GOLD EAST PAPER JIANGSU
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