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Method of raising water filtering performance of asbestos and non-asbestos latex sheet

A technology for latex sheet extraction and performance, which is applied in the direction of retention aid addition, paper machine wet end, paper, etc., which can solve the problems of continuous production of fourdrinier paper machines, abnormal operation of paper machines, and poor pulp drainage performance To achieve the effect of improving water filtration performance, good dehydration and forming, and reducing beating degree

Inactive Publication Date: 2007-11-28
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the poor water filtration performance of the slurry in the asbestos latex sheet production process, the used asbestos fibers and fillers have a high degree of beating (the degree of beating is above 70°SR), therefore, resulting in the pulp composed of these raw materials. It is very difficult to dehydrate the material in the wire section of the paper machine, which makes the paper machine unable to run normally. It can only be produced on the intermittent rotary paper machine, and cannot be continuously produced on the fourdrinier paper machine.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1: at first, asbestos fiber is dispersed in water and the mass concentration of the asbestos fiber after dispersion is 1%, then adds the calcium carbonate that is 90% with respect to asbestos fiber mass ratio, turns 50 under the rotating speed of 450 rev / mins. Turn to beating; secondly, add 40% latex, 0.1% sulfur and 0.01% dihydroquinoline relative to the asbestos fiber mass ratio, and mix evenly; finally, send the above raw materials that are evenly mixed into the paper machine wire front flow delivery system , Add 0.02% cationic polyacrylamide retention aid relative to the mass of asbestos fiber before the pulping pump, make it on a paper machine, and dry it.

Embodiment 2

[0008] Embodiment 2: First, disperse the carbon fiber in water so that the mass concentration of the dispersed carbon fiber is 30%, then add talcum powder with a mass ratio of 76% relative to the carbon fiber, and turn 3000 rpm at a speed of 450 rpm for beating; Secondly, add the carbon black that is 32% relative to the carbon fiber mass ratio, mix homogeneously; Then add the latex, 1.3% sulfur and 0.5% anilinophenylmaleimide relative to the carbon fiber mass ratio, Mix evenly; finally, send the uniformly mixed above raw materials into the paper machine wire flow system, add 3% cationic polyacrylamide retention aid relative to the mass of carbon fiber before the pressure screen, copy and shape on the paper machine, and dry it. Can.

Embodiment 3

[0009] Embodiment 3: at first, disperse glass fiber in water and make the mass concentration of the glass fiber after dispersing be 18%, then add the attapulgite powder that is 55% relative to glass fiber mass ratio, turn under the rotating speed of 450 rpm 2600 rpm beating; secondly, add 45% carbon black relative to the glass fiber mass ratio, mix well; then add 2% latex, 16% sulfur and 1.8% dihydroquinoline relative to the glass fiber mass ratio , mixed evenly; finally, send the uniformly mixed above raw materials into the front flow system of the paper machine, add 0.5% cationic polyacrylamide retention aid relative to the mass of the glass fiber before the headbox, and form them on the paper machine , dry it.

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PUM

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Abstract

The method of raising water filtering performance of asbestos and non-asbestos latex sheet includes the following steps: dispersing asbestos or non-asbestos fiber in water and adding stuffing to pulp; adding carbon black and mixing homogeneously; adding latex, sulfur and antiager and mixing homogeneously; feeding the homogeneously mixed material to front flowing system of papermaking machine, adding cationic polyacrylamide as retention aid before the pulp flushing pump, pressure sieve or high position tank; and final making sheet and drying. The addition of proper amount of cationic polyacrylamide as retention aid makes the pulp possess excellent water filtering performance, lowers the beating degree of the pulp to below 50 deg SR and produces excellent dewatering and forming performance of the material in the net.

Description

technical field [0001] The invention belongs to the intersecting field of rubber industry and papermaking industry, and particularly relates to a method for improving the water filtration performance of an asbestos latex scissor board. Background technique [0002] The traditional asbestos rubber sheet is mainly produced by mixing and molding process (therefore, its product is also called asbestos rubber sheet), that is, the rubber adhesive needs to be dissolved in an organic solvent, and then mixed with asbestos fibers, other compounding agents and fillers. It is made into a material, and then rolled by a double-roller forming machine to make a sealing sheet. Due to the large energy consumption, high pollution and low efficiency of this method, it has been basically eliminated in western developed countries. At present, it has been basically turned to the production of papermaking (its product is called asbestos latex copy board, referred to as copy board), that is, first a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21F1/82D21H13/42D21H17/55D21H21/10
Inventor 夏新兴张俊苗孙瑜陆赵情李鸿魁池东明武慧研
Owner SHAANXI UNIV OF SCI & TECH
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