Coated white cardboard made of various fiber raw materials and production process of coated white cardboard

A fiber raw material and production process technology, applied in the field of coated white cardboard and its production process, can solve the problems of poor paper strength, poor water drainage performance, paper opacity and low bulk

Pending Publication Date: 2022-05-17
湛江晨鸣浆纸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Office waste paper/magazine paper deinked pulp is waste paper pulp, and bagasse pulp is a non-wood fiber raw material, both of which are excellent raw materials for papermaking. For a long time, bagasse pulp has been used to make various cultural pa

Method used

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  • Coated white cardboard made of various fiber raw materials and production process of coated white cardboard
  • Coated white cardboard made of various fiber raw materials and production process of coated white cardboard
  • Coated white cardboard made of various fiber raw materials and production process of coated white cardboard

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] Example 1

[0040] A kind of coated white cardboard of various fiber raw materials, its basis weight is 300g / m 2 , including a surface layer, a core layer and a bottom layer, the surface layer is sequentially coated with a precoat layer, a core coating layer and a top coat layer from the inside to the outside, and the outer surface of the bottom layer is coated with a primer layer. The gram weight of the surface layer is 42g / m 2 , the weight of the bottom layer is 54g / m 2 , the coating weight of the precoat is 11g / m 2 , the coating weight of the core coating is 12g / m 2 , the coating weight of the top coat is 12g / m 2 , the coating weight of the primer layer is 10g / m 2 .

[0041] The fiber raw materials of the surface layer include 20 parts of bleached kraft softwood pulp (NBKP) and 80 parts of bleached kraft hardwood pulp (LBKP). The fiber raw materials of the core layer include 12 parts of bleached kraft softwood pulp (NBKP), 75 parts of bleached hardwood chemica...

Example Embodiment

[0071] Example 2

[0072] A kind of coated white cardboard of various fiber raw materials, its basis weight is 350g / m 2, including a surface layer, a core layer and a bottom layer, the surface layer is sequentially coated with a precoat layer, a core coating layer and a top coat layer from the inside to the outside, and the outer surface of the bottom layer is coated with a primer layer. The gram weight of the surface layer is 48g / m 2 , the weight of the bottom layer is 58g / m 2 , the coating weight of the precoat is 12g / m 2 , the coating weight of the core coating is 13g / m 2 , the coating weight of the top coat is 12g / m 2 , the coating weight of the primer layer is 11g / m 2 .

[0073] The fiber raw materials of the surface layer include 25 parts of bleached kraft softwood pulp (NBKP) and 75 parts of bleached kraft hardwood pulp (LBKP). The fiber raw materials of the core layer include 15 parts of bleached kraft softwood pulp (NBKP), 70 parts of bleached hardwood chemical...

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Abstract

The invention relates to a coating white cardboard made of various fiber raw materials and a production process thereof, the fiber raw materials of a core layer comprise bleached sulfate softwood pulp, bleached hardwood chemical thermo-mechanical pulp, white cardboard waste pulp and bagasse pulp, and the fiber raw materials of a bottom layer comprise bleached sulfate softwood pulp, bleached sulfate hardwood pulp and high-grade deinked pulp. An interlayer reinforcing agent is sprayed between the layers; the bagasse pulp can be chemically bleached mechanical pulp, and the interlayer enhancer comprises 40-75 parts of spraying starch, 10-20 parts of water-based novolac epoxy resin emulsion and 8-15 parts of styrene-acrylic emulsion; the retention and drainage aid in the slurry of the core layer and the bottom layer comprises PEI, CPAM and bentonite. According to the method, the problem of shortage of wood raw materials can be relieved, the cost is reduced, the defects of the strength, water resistance and the like of fiber pulp are overcome by spraying the interlayer reinforcing agent between layers, the finished pulp can have better water filtering performance and papermaking performance by chemically bleaching the mechanical bagasse pulp, and meanwhile, the strength performance of the finished paper is improved.

Description

technical field [0001] The invention relates to the technical field of pulping and papermaking, in particular to a coated white cardboard made of various fiber raw materials and a production process thereof. Background technique [0002] Coated white cardboard has a smooth surface, high whiteness and good strength, and is widely used in high-end packaging, advertising and other fields. The main raw materials of white cardboard are coniferous wood pulp, hardwood and chemical-mechanical pulp. The supply and demand of these raw materials directly affect the price trend of white cardboard. When these wood pulp raw materials are in a state of tight supply and demand, seek other types of fiber raw materials It is particularly urgent to replace some wood pulp raw materials. Office waste paper / magazine paper deinked pulp is waste paper pulp, and bagasse pulp is a non-wood fiber raw material, both of which are excellent raw materials for papermaking. For a long time, bagasse pulp ha...

Claims

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Application Information

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IPC IPC(8): D21H27/30D21F11/00D21H21/18D21H21/20D21H21/16D21H21/36D21H21/10D21H11/04D21H11/12
CPCD21H27/30D21F11/00D21H21/18D21H21/20D21H21/16D21H21/36D21H21/10D21H11/04D21H11/12Y02W30/64
Inventor 马禄润杨志永孟坤李金伟梁文聪
Owner 湛江晨鸣浆纸有限公司
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