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Light coated white craft paper and method for manufacturing same

A kraft cardboard and white surface technology, which is applied in the direction of coated paper base paper, coating, paper, etc., can solve the problems of high smoothness, aggravated papermaking pollution, and easy tearing of paper sheets, so as to improve smoothness and gloss , reduce surface roughness, and reduce the effect of paper wool problems

Active Publication Date: 2009-11-18
昌乐新迈纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although heavy coated paper has high whiteness, high smoothness, small ink absorption, good printing gloss and excellent printability, but due to the thick coating layer, its strength is very low under the same quantitative conditions. Cannot meet high-strength packaging requirements
At the same time, due to its low strength, the paper sheet is easily broken during the operation of the paper machine, so it is impossible to achieve low quantitative and provide users with low manufacturing cost.
Coatings are non-recyclable raw materials. When re-coated paper is recycled, because of its high coating content, it will hinder the water filtration of the forming wire and felt for papermaking, seriously affecting the normal production and product quality. At the same time, it will increase Difficulty in water treatment, aggravating paper pollution

Method used

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  • Light coated white craft paper and method for manufacturing same
  • Light coated white craft paper and method for manufacturing same
  • Light coated white craft paper and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Pulping

[0024] a. Beat the wood pulp to a degree of 40-50°SR to obtain the surface layer pulp.

[0025] b. Beat recycled old books, old newspapers, and office waste paper to a beating degree of 45-55°SR to prepare lining layer slurry.

[0026] c. Beat the OCC slurry to a beating degree of 30-40°SR to prepare the core layer slurry.

[0027] d. Beat the OCC slurry to a beating degree of 30-40°SR to prepare the bottom layer slurry.

[0028] 2. Coating preparation

[0029] Coating formula: see Table 1.

[0030] Table 1

[0031]

[0032]

[0033] In Table 1, the calcium carbonate is preferably heavy calcium carbonate, the average particle diameter of the fine-grained kaolin is 0-2 μm, and the exfoliated kaolin is obtained by peeling fine-grained kaolin with an average particle diameter less than 2 μm. For ordinary fine-grained kaolin, the diameter-thickness ratio of exfoliated kaolin is larger, so the covering effect is better.

[0034] After stirring the ab...

Embodiment 2

[0049] Embodiment 2 is basically the same as embodiment 1, and its difference is the formula of coating, and the coating formula of embodiment 2 is shown in Table 1.

[0050] Quantitative 150g / m made by the above process 2 See Table 2 for the technical indicators of light-coated white-faced kraftboard.

Embodiment 3

[0052] Embodiment 3 is basically the same as embodiment 1, and its difference lies in the formula of coating, and the coating formula of embodiment 3 is shown in Table 1.

[0053] Quantitative 170g / m produced by the above process 2 See Table 2 for the technical indicators of light-coated white-faced kraftboard.

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Abstract

The invention discloses a light coated white craft paper, which comprises a top layer, a core layer, a bottom layer and a coating layer, wherein the coating layer is arranged on the top layer, has a relatively uniform thickness and goes up and down with the surface of the top layer; and the fixed weight of the light coated white craft paper is 120 to 220 g / m and the coating weight of the coating layer is 6 to 15 g / m. The invention also discloses a method for manufacturing the light coated white craft paper. With the combined advantages of the conventional white craft paper and heavy coated paper, the light coated white craft paper has a thin coating layer and retains the strength of base paper, thereby realizing an extremely low fixed weight that can greatly improve the paper yield of unit weight and reduce production costs for users. At the same time, less coating content reduces the difficulties in the recovery of the light coated white craft paper, reduces water pollution and brings the light coated white craft paper a promising development prospect.

Description

technical field [0001] The invention relates to the technical field of light-coated white-faced kraft cardboard, and also relates to a manufacturing method of light-coated white-faced kraft cardboard. Background technique [0002] White-faced kraft cardboard has high strength and high whiteness on one side, so it has become a widely used packaging material. It usually includes a surface layer, a core layer and a bottom layer, or a surface layer, a lining layer, a core layer and a bottom layer. Due to the layered structure, the surface layer, lining layer, core layer and bottom layer can be made of different For example, primary wood pulp can be used for the surface layer, and secondary fiber pulp can be used for the remaining layers. Therefore, the production cost of white-faced kraft linerboard is low, and the pollution load of pulping is small, which is very suitable for my country's national conditions of lack of natural wood resources. . However, the surface smoothness o...

Claims

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Application Information

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IPC IPC(8): D21H19/36D21H19/40D21H19/44D21H21/50D21H19/72D21H23/52D21H23/34
Inventor 王东兴张增国张洪明慈晓雷刘命洲耿书江马宝庆赵长征贾勇王涛
Owner 昌乐新迈纸业有限公司
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