A kind of preparation method of offset paper

A technology of offset paper and pulp, which is applied in the field of offset paper preparation, can solve the problems of filler retention rate and low ash content, low paper strength, uneven thickness, etc., and achieve the effect of improving filler retention rate

Active Publication Date: 2019-07-09
JILIN CHENMING PAPER IND
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems in the prior art, the present invention provides a method for preparing offset paper, which can solve the problem of low filler retention and ash content in the prior art, and premature combination of polypropylene chemicals and turbulent slurry. The paper strength is low and the thickness is uneven

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The two kinds of pulp kraft softwood pulp and hardwood pulp are mixed according to the weight ratio of 70%: 30%, and the degree of knocking is controlled to 40°SR; then anionic rosin gum emulsion is added to dilute to a mass fraction of 0.5%; stir ; add filler 1% aluminum sulfate, 10% calcium carbonate, 2% titanium dioxide, magnetic stirring; retention aid polyacrylamide, bentonite, high polymer, use, first add polyacrylamide relative to the weight of the slurry, the weight The ratio is 3%, then add 0.4% bentonite, stir, and finally add 1% high polymer, the high polymer is composed of polyacrylate, polymethacrylic acid with a ratio of 30%: 30%: 40%. ester, polycarboxymethylacrylate, magnetic stirring; then sent to the headbox to the Internet, adjust the Internet flow, control the quantification of the paper; after the wet paper comes out of the wire section, it enters the press section for six-roller four-nip composite pressing, pressing After the dryness is ≥39%, it en...

Embodiment 2

[0050] The two kinds of pulp kraft softwood pulp and hardwood pulp are mixed according to the weight ratio of 70%: 30%, and the degree of knocking is controlled to 38°SR; then anionic rosin gum emulsion is added to dilute to a mass fraction of 0.3%; stir ; add filler 4% aluminum sulfate, 10% calcium carbonate, 2% titanium dioxide successively, magnetically stir; retention aid polyacrylamide, bentonite, high polymer are used together, relative to the weight of slurry, first add polyacrylamide, weight The ratio is 8%, then add 0.5% bentonite, stir, and finally add 1% high polymer, the high polymer is composed of polyacrylate, polymethacrylic acid with a ratio of 30%: 40%: 30%. ester, polycarboxymethylacrylate, magnetic stirring; then sent to the headbox to the Internet, adjust the Internet flow, control the quantification of the paper; after the wet paper comes out of the wire section, it enters the press section for six-roller four-nip composite pressing, pressing After the dry...

Embodiment 3

[0052] The two kinds of pulp kraft softwood pulp and hardwood pulp are mixed according to the weight ratio of 70%: 30%, and the degree of knocking is controlled to 29 ° SR; then anionic rosin gum emulsion is added to dilute to a mass fraction of 0.5%; stir ; add filler 5% aluminum sulfate, 10% calcium carbonate, 1% titanium dioxide, magnetic stirring; retention aid polyacrylamide, bentonite, high polymer used together, relative to the weight of the slurry, first add polyacrylamide, weight The ratio is 3%, then add 0.2% bentonite, stir, and finally add 1% high polymer, the high polymer is composed of polyacrylate, polymethacrylic acid with a ratio of 30%: 30%: 40%. ester, polycarboxymethylacrylate, magnetic stirring; then sent to the headbox to the Internet, adjust the Internet flow, control the quantification of the paper; after the wet paper comes out of the wire section, it enters the press section for six-roller four-nip composite pressing, pressing After the dryness is ≥49...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
strengthaaaaaaaaaa
retention rateaaaaaaaaaa
whitenessaaaaaaaaaa
Login to view more

Abstract

The invention relates to an offset paper preparation method. The method comprises the steps that pulping is conducted with wood pulp, a sizing agent is added, filler is added, a retention agent is added, wet paper sheet papermaking is conducted, drying is conducted, and glaced finish is conducted to obtain paper. A quintuple retention system is used, in the step of adding the retention agent, polyacrylamide, bentonite and high polymer are cooperatively used, compared with the sizing agent weight, polyacrylamide is added first at the weight ratio being 3-8%, then 0.1-0.5% of bentonite is added,stirring is conducted, and finally 0.1-1% of high polymer is added, wherein the high polymer is prepared from polyacrylate, polymethacrylate, polycarboxymethyl acrylate at the ratio being 20-40%:30-40%:20-50%. The offset paper prepared on the basis of the quintuple retention system has the advantages of being high in strength, whiteness and smoothness and the like.

Description

technical field [0001] The invention relates to a method for preparing paper, in particular to a method for preparing offset paper. Background technique [0002] With the vigorous development of my country's printing industry, it has also stimulated a large demand for my country's paper industry. At present, the paper industry has brought a series of problems, such as the shortage of forest resources, the shortage of water resources and the deterioration of pollution. Therefore, papermaking generally uses closed circulating water. Considering the balance of reducing pulp consumption, drainage and dehydration rate, and strength, the most effective way is to use high-efficiency paper retention aids in the papermaking process. Although the amount of papermaking additives only accounts for 1-2% of the total amount of paper, a small amount of addition plays an important role in paper quality and cost. Retention aids can significantly improve the retention rate of fine fibers, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/67D21H21/10D21H21/16D21H27/00
CPCD21H17/675D21H21/10D21H21/16D21H27/00
Inventor 刘玮哲杨辉刘洋何志强
Owner JILIN CHENMING PAPER IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap