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Pulp-grinding method for improving fibre brooming and application thereof in papermaking

A pulp refining and fiber technology, applied in chemical instruments and methods, pulp beating/refining methods, papermaking, etc., can solve problems such as the difficulty of improving fiber separation and fiberization, achieve improved refining effect, and maintain paper strength , Improve the effect of fiber strength

Inactive Publication Date: 2012-05-23
GOLD EAST PAPER JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing beating equipment mainly includes: Dutch beater, double disc mill, conical refiner, cylindrical refiner, etc., and these beating equipment have many restrictions: (1) cutter head type selection; (2) Concentration of beating; (3) mill type, etc.
These conditions make it difficult to improve the fibrillation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Prepare two identical slurry samples, and the hard grinding aid is PCC. The first part does not add Filler for refining, and the second part adds PCC in a certain proportion before refining, and then mixes with the fibers in the pulp sample and then refines; the two pulp samples after refining are made under the same conditions Manufactured slices were tested for their physical properties. The results are shown in the table below:

[0017] Table I

[0018] Test items

[0019] After PCC refining, the strength of the pulp has been significantly improved: the rupture index increased by 19.8%; the cohesion increased by 23.75%

Embodiment 2

[0021] On-site paper machine pilot test, hard grinding aid is PCC. Before the slurry enters the disc refiner, PCC is mixed with the slurry in a certain proportion, and then mixed and ground together, and the physical properties of the paper before and after adding Filler are compared. The data are as follows:

[0022] Table II

[0023] Test items

[0024] When performing Filler refining, the paper strength is equivalent to that before and after Filler refining, but the ash content of the paper is increased by about 1.5%.

Embodiment 3

[0026] Concrete experimental procedure is the same as embodiment 1, and hard grinding aid is glass fiber. Using glass fiber instead of PCC and fiber for mixing and refining, the physical properties of the two pulp samples are compared in the following table:

[0027] Table three

[0028] Test items

[0029] After the glass fiber is mixed and refined, the strength of the slurry is significantly improved: the tensile strength increases by 12.2%; the cohesion increases by 17.26%

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PUM

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Abstract

The invention discloses a pulp-grinding method for improving fibre brooming, comprising the following steps: adding rigid filler to the pulp before grinding, and grinding after mixing the rigid filler and the pulp fibre, wherein the additive amount of the rigid filler accounts for 1%-30% of the total mass of the pulp; the rigid filler is any one or the mixture of several types of PCC, GCC, Talc, titanium pigment and bentonite of filler grade; and the rigid filler can also be fibrous mineral fibre. The adoption of the pulp-grinding method can improve devillicate brooming degree of the fibre, improve paper strength and interweaving, or can improve the ash content of paper and reduce fibre consumption under the condition of maintaining a considerable paper strength, and can reduce productioncost and reduce the grinding energy consumption while protecting the environment.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking, in particular to a refining method for promoting fiber brooming and its application in papermaking. Background technique [0002] Separation of pulp fibers is beneficial to improve the strength and interweaving of paper. At present, the separation of fibers is mainly accomplished by equipment beating. Existing beating equipment mainly includes: Dutch beater, double disc mill, conical refiner, cylindrical refiner, etc., and these beating equipment have many restrictions: (1) cutter head type selection; (2) The concentration of beating; (3) the type of mill, etc. These conditions make it difficult to improve the fibre-fibrilization. Contents of the invention [0003] The object of the present invention is to provide a refining method for promoting fiber brooming and its application in papermaking. The method is simple and safe, and the ash content of the paper can be significan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21D1/20C09K3/14
Inventor 王仁荣张明陈剑万晓玲王炜
Owner GOLD EAST PAPER JIANGSU
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