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Method for improving performance of finished paper

A performance and paper-making technology, applied in papermaking, paper machine, textile and papermaking, etc.

Active Publication Date: 2014-04-16
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some literatures have reported on the compounding of different fillers, but they are all limited to the compounding research on heavy calcium carbonate, light calcium carbonate, talcum powder, kaolin and other similar fillers.

Method used

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  • Method for improving performance of finished paper
  • Method for improving performance of finished paper

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 1) Disintegrate the chemical softwood pulp and chemical hardwood pulp separately, add water to dilute the pulp to a mass concentration of 10%, and then beat the chemical softwood pulp and chemical hardwood pulp to a beating degree of 28°SR~32 °SR and 22°SR~28°SR, and dilute with water respectively so that the mass concentration of chemical softwood pulp and chemical hardwood pulp is 0.1%;

[0030] 2) Mix chemical softwood pulp and chemical hardwood pulp at a mass ratio of 10:90, and add chemical softwood pulp and chemical hardwood pulp to the mixture with a composite filler of 20% dry weight and mix evenly;

[0031] The preparation of described composite filler is as follows:

[0032] According to the mass ratio of 4:1, the high-density filler light calcium carbonate with an average particle size of 3 μm to 15 μm and the low-density filler with an average particle size of 10 μm to 30 μm are used to synthesize calcium silicate;

[0033] The high-density and low-density ...

Embodiment 2

[0038] 1) Disintegrate the chemical softwood pulp and chemical hardwood pulp separately, add water to dilute the pulp to a mass concentration of 10%, and then beat the chemical softwood pulp and chemical hardwood pulp to a beating degree of 28°SR~32 °SR and 22°SR~28°SR, and dilute with water respectively so that the mass concentration of chemical softwood pulp and chemical hardwood pulp is 0.3%;

[0039] 2) Mix chemical softwood pulp and chemical hardwood pulp at a mass ratio of 25:75, and add chemical softwood pulp and chemical hardwood pulp to the mixture with a composite filler with a dry weight of 28% and mix evenly;

[0040] The preparation of described composite filler is as follows:

[0041] According to the mass ratio of 1:4, high-density fillers with an average particle size of 3 μm to 15 μm are used for ordinary papermaking ground calcium carbonate and low-density fillers with an average particle size of 10 μm to 30 μm to synthesize calcium silicate;

[0042] The high...

Embodiment 3

[0047] 1) Disintegrate the chemical softwood pulp and chemical hardwood pulp separately, add water to dilute the pulp to a mass concentration of 10%, and then beat the chemical softwood pulp and chemical hardwood pulp to a beating degree of 28°SR~32 °SR and 22°SR~28°SR, and dilute with water respectively so that the mass concentration of chemical softwood pulp and chemical hardwood pulp is 0.15%;

[0048] 2) Mix chemical softwood pulp and chemical hardwood pulp at a mass ratio of 15:85, and add chemical softwood pulp and chemical hardwood pulp to the mixture with 30% dry weight composite filler and mix evenly;

[0049] The preparation of described composite filler is as follows:

[0050] According to the mass ratio of 1:2, the high-density filler talc powder with an average particle size of 3 μm to 15 μm and the low-density filler with an average particle size of 10 μm to 30 μm are used to synthesize calcium silicate;

[0051] The high-density and low-density fillers are made...

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Abstract

The invention provides a method for improving performance of finished paper. The method comprises the following steps of: firstly, respectively performing size degradation, watering and pulping on chemical softwood pulp and chemical hardwood pulp, mixing the two pulps in a ratio of (10-25):(75-90), and adding a high-density compounded filler; then gelatinizing cationic starch into the obtained pulp and adding a retention aid; and finally performing papermaking. According to the method, after being compounded, the high-density filler is applied to the papermaking technology, so that the loose depth and the tearing strength of paper sheets and the ash content advantage of the finished paper can be effectively improved.

Description

technical field [0001] The invention belongs to the field of papermaking, and in particular relates to a method for improving the paper-making performance of paper. Background technique [0002] In order to improve the optical properties and printability of paper, meet some special performance requirements of paper, save fiber raw materials and reduce production costs, fillers are generally required to be added in the production of paper. The filling amount of different paper types varies greatly, ranging from 2% to 3% and up to 40%. Since the price of general fillers is only one-tenth of the price of plant fibers or even lower, adding more fillers to paper can significantly reduce paper production costs. For paper with the same weight, every percentage point increase in filler content means that the plant fiber content has decreased by one percentage point year-on-year. percent, the paper industry can save nearly 800,000 tons of pulp every year, which is equivalent to sav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/67D21H17/68D21H17/29D21H17/55D21F3/00
Inventor 张美云宋顺喜孙俊民张战军吴养育
Owner SHAANXI UNIV OF SCI & TECH