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A kind of production method that occ pulp replaces onp pulp to produce coated white board paper

A production method and whiteboard paper technology are applied in the field of pulp and paper production to achieve the effects of increasing the yield of pulp, reducing the amount of deinking chemicals and reducing the amount of imported raw materials

Active Publication Date: 2021-03-02
LIANSHENG PAPER IND LONGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, it is necessary to provide a production method to replace ONP pulp to produce coated white board paper, to solve the problem of reducing or even not using imported ONP waste newspapers to produce coated white board paper, and to further reduce the consumption of deinking chemical auxiliary materials and the discharge of hazardous solid waste from deinking The problem

Method used

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  • A kind of production method that occ pulp replaces onp pulp to produce coated white board paper

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] see figure 1 , this embodiment provides a production method for OCC pulp instead of ONP pulp to produce coated white board paper, the specific method includes:

[0036] Stock preparation:

[0037]Recycled OCC waste boxboard pulp is used as raw material. The pulp enters the fiber grading sieve after crushing, high-concentration slag removal, and coarse screening. The pulp is screened into OCC short fiber, OCC medium fiber and OCC long fiber. Among them, because the length of OCC medium fiber and the cleanliness of the slurry are more suitable for the bottom layer of coated whiteboard paper, the medium fiber pulp obtained by classifying is passed through a low-concentration slag remover and a multi-disc thickener to remove the medium fiber and heat disperse it. System, after being processed by the heat disperser, it will be sent to the double-disc refiner. The stickies, oil wax and other hot-melt substances in the optimized OCC medium fiber pulp slurry were effectively...

Embodiment 2

[0048] see figure 1 , this embodiment provides a production method for OCC pulp instead of ONP pulp to produce coated white board paper, the specific method includes:

[0049] Pulp preparation: Recycled OCC waste boxboard pulp is used as raw material. After crushing, high-concentration slag removal, and coarse screening, the pulp enters the fiber grading sieve, and passes through the first-stage and second-stage grading sieves with a sieve gap of 0.127mm. Finally, the OCC pulp is screened into OCC short fibers, OCC medium fibers and OCC long fibers. Among them, because the length of OCC medium fiber and the cleanliness of the slurry are more suitable for the bottom layer of coated whiteboard paper, the medium fiber pulp obtained by classifying is passed through a low-concentration slag remover and a multi-disc thickener to remove the medium fiber and heat disperse it. System, after being processed by the heat disperser, it will be sent to the double-disc refiner. The stickie...

Embodiment 3

[0060] see figure 1 , this embodiment provides a production method for OCC pulp instead of ONP pulp to produce coated white board paper, the specific method includes:

[0061] Stock preparation:

[0062] Recycled OCC waste boxboard pulp is used as raw material. The pulp enters the fiber grading sieve after crushing, high-concentration slag removal, and coarse screening. The pulp is screened into OCC short fiber, OCC medium fiber and OCC long fiber. Among them, because the length of OCC medium fiber and the cleanliness of the slurry are more suitable for the bottom layer of coated whiteboard paper, the medium fiber pulp obtained by classifying is passed through a low-concentration slag remover and a multi-disc thickener to remove the medium fiber and heat disperse it. System, after being processed by the heat disperser, it will be sent to the double-disc refiner. The stickies, oil wax and other hot-melt substances in the optimized OCC medium fiber pulp slurry were effectivel...

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Abstract

The invention relates to a production method for producing coated white board paper by replacing ONP pulp with OCC pulp and relates to the technical field of pulping and papermaking production. According to the production method, by adopting OCC medium-fiber pup as pulp of a lining and an undercoat and adopting OCC staple-fiber and long-fiber pulp as pulp of a core layer, procedures of pulp preparing are simplified, the import volume of ONP scrap paper raw materials and the consumption of deinking chemicals are reduced, the raw material cost is reduced, and the yield of the pulp is increased;and the produced coated white board paper has the advantages that the performance is improved, the surface roughness (PPS) is 1.0 to 1.8 microns, the surface strength (IGT) is 1.2m / s to 1.8m / s, the offset printing performance (RI) is 4 to 6 times, the folding resistance is 12 to 20 times, finished paper has the glossiness of 39% to 42%, the ink absorptivity of 21% to 28% and the smoothness of 140Sto 200S, and thus, the coated white board paper reaches standards of high-quality coated white board paper.

Description

technical field [0001] The invention relates to the technical field of pulping and papermaking production, in particular to a production method for producing coated white board paper by using OCC pulp instead of ONP pulp. Background technique [0002] Coated white board paper has high whiteness on the coated surface, good smoothness, ink absorption and printing gloss, and the cardboard itself has good stiffness and folding resistance, so it can be used for high-quality color offset printing and gravure printing Printing can meet the requirements of packaging, and it is a high-quality material for making high-end product packaging boxes. [0003] The structure of coated white board paper is the surface layer, lining layer, core layer and bottom layer. At present, most of the coated whiteboards are based on imported ONP (Old News Paper, waste newspapers) such as US waste 3#, US waste 6#, US waste 8#, US waste 9# and OMG (Old Magazine, old magazines), etc. Pulp raw materials,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21F11/00D21B1/32D21C5/02D21H27/00D21H23/52
CPCD21B1/32D21C5/025D21F11/00D21H23/52D21H27/00Y02W30/64
Inventor 陈光军李全勇袁柳赵全虎李步文
Owner LIANSHENG PAPER IND LONGHAI