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Method for preparing non-asbestos latex sheet

A technology of latex sheet, non-asbestos, applied in the direction of fiberboard, synthetic cellulose/non-cellulose material pulp/paper, inorganic compound addition, etc. Production, paper machine can not run normally and other problems, to achieve the effect of good water filtration performance, good dewatering and forming effect

Inactive Publication Date: 2008-01-16
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 during the production of non-asbestos latex boards, the non-asbestos fibers and fillers used have a high degree of beating (beating degree is above 70°SR), therefore, the composition of these raw materials It is very difficult to dehydrate the pulp in the wire section of the paper machine, which makes the paper machine unable to operate normally. It can only be produced on the intermittent cylinder 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

[0008] Embodiment 1: 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 raw material into the paper machine net flow system, add 3% cationic polyacrylamide retention aid relative to the mass ratio of carbon fiber before the pressure screen of the net front flow system, Before the pulp box, 0.5% bentonite relative to the mass ratio of carbon fibers is added, and finally, it is molded on a paper machine and dried.

Embodiment 2

[0009] Embodiment 2: at first, disperse the glass fiber in water and make the mass concentration of the glass fiber after dispersion be 13%, then add the attapulgite powder that is 1% with respect to the glass fiber mass ratio, turn under the rotating speed of 450 rpm 450 rpm beating; secondly, add 53% carbon black relative to the glass fiber mass ratio, mix well; then add 27% latex, 14% sulfur and 15% anilinophenyl group relative to the glass fiber mass ratio Maleimide, mixed evenly; finally, feed the uniformly mixed raw materials into the front flow system of the paper machine, and add cationic polypropylene with a mass ratio of 1% relative to the glass fiber before the high box of the front flow system As the amide retention aid, 0.05% bentonite relative to the mass ratio of glass fiber is added before the headbox, and finally, it is molded on a paper machine and dried.

Embodiment 3

[0010] Embodiment 3: first, aramid fibers are dispersed in water so that the mass concentration of dispersed aramid fibers is 26%, and then calcium carbonate is added that is 32% relative to the mass ratio of aramid fibers, at a speed of 450 rpm Turn down to 1500 rpm for beating; secondly, add carbon black that is 26% relative to the aramid fiber mass ratio, and mix evenly; then add 15% latex, 10% sulfur and 5% carbon black relative to the aramid fiber mass ratio Anilinophenylmaleimide, mixed evenly; finally, the uniformly mixed raw material is sent to the paper machine wire flow system, and the mass ratio relative to the aramid fiber is added before the pulp pump of the wire flow system 0.6% cationic polyacrylamide retention aid, add 10% bentonite relative to the mass ratio of aramid fibers before the headbox, and finally, form it on a paper machine and dry it.

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PUM

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Abstract

A preparation method of non-asbestos latex beater sheets comprises: firstly dispersing non-asbestos fibers in water and pulping after adding a filler; then adding carbon black and mixing thoroughly; sequentially adding latex, sulphur and anti-aging agent and mixing thoroughly; and finally feeding the resulting mixture to the approach system of a paper making machine, adding a cationic polyacrylamide retention aid prior to the fan pump or press screen or head-tank of the approach system, adding bentonite prior to the headbox, making paper, and drying. In the invention, an appropriate amount of cationic polyacrylamide retention aid is added prior to the fan pump or press screen or head-tank of the approach system of paper making machine and sequentially an appropriate amount of bentonite prior to the headbox, so that the drainage property of beater sheet is improved after the raw material flows into the wire section of paper machine from the headbox and the beating degree of raw material in the wire section is reduced below 50oSR, thereby realizing excellent drainage and molding of raw materials in the wire section.

Description

technical field [0001] The invention belongs to the intersecting fields of rubber industry and papermaking industry, and particularly relates to a preparation method of non-asbestos latex scissor board. Background technique [0002] The traditional non-asbestos rubber sheet is mainly produced by mixing and molding process (therefore, its product is also called non-asbestos rubber sheet). The filler is mixed to make a material, and then rolled by a double-roller sheeting 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. The non-asbestos fibers are dispersed in water, then beating, filling, glue and various auxiliary materials are added, and finally, through the flow conveying system, they are formed on the paper machine, pressed, dried, cut, packed, and put into storage. The specifications of the boards produced by this production process ar...

Claims

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Application Information

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IPC IPC(8): D21J1/16D21H21/10D21H17/55D21H17/68D21H21/06D21H13/10D21H13/40D21H13/50
Inventor 夏新兴张俊苗武慧研陆赵情李鸿魁池东明王春雁
Owner SHAANXI UNIV OF SCI & TECH
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