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Method for preparing asbestos latex sheets

A latex and asbestos technology is applied in the field of preparation of asbestos latex sheets, and can solve the problems of affecting latex adsorption, affecting the performance of asbestos latex sheets, and decreasing the positive charge of asbestos fibers.

Inactive Publication Date: 2010-01-27
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Asbestos fiber needs to be beaten before it can be used to produce asbestos latex sheet. However, during the beating process, the high-priced metal ions in the asbestos fiber will gradually dissolve in water, such as Fe 3+ , Mn 4+ 、Al 3+ , Ca 2+ Etc., reduce the positive charge of asbestos fiber
When the latex is added to the asbestos fiber suspension, due to the negative charge of the latex, under the influence of these high-valent metal ions, there will be flocculation between the latex to form gel beans, thus affecting the good performance of the latex on the surface of the asbestos fiber. Uniform adsorption, which affects the performance of asbestos latex sheet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: at first, asbestos fiber is dispersed in water, obtains the asbestos fiber suspension that mass concentration is 10%, then, this asbestos fiber suspension is carried out beating treatment, beating degree is controlled at 60~85 ° SR; Secondly, to Add 5% ethylenediaminetetraacetic acid, 20% calcium carbonate, 5% carbon black, 35% styrene-butadiene latex, 0.5% sulfur and 0.01% The dihydroquinoline is mixed evenly; finally, through the flow delivery system of the paper machine, it is formed on the paper machine, dried, and the asbestos latex sheet is produced.

Embodiment 2

[0012] Embodiment 2: first, asbestos fiber is dispersed in water, obtains the asbestos fiber suspension that mass concentration is 22%, then, this asbestos fiber suspension is carried out beating treatment, beating degree is controlled at 60~85 ° SR; In the asbestos fiber suspension after beating, add relative to asbestos fiber quality 3% diethylene triamine pentaacetic acid, 40% attapulgite powder, 8% carbon black, 10% acrylic latex, 1% sulfur and 1% % anilinophenylmaleimide is mixed evenly; finally, through the flow delivery system of the paper machine, it is molded on the paper machine, dried, and the asbestos latex copy board is produced.

Embodiment 3

[0013] Embodiment 3: first, disperse asbestos fiber in water, obtain the asbestos fiber suspension that mass concentration is 35%, then, this asbestos fiber suspension is carried out beating treatment, beating degree is controlled at 60~85 ° SR; Add 1% N-hydroxyethylethylamine triacetic acid, 5% calcium carbonate, 1% carbon black, 20% nitrile latex, and 0.1% sulfur to the asbestos fiber suspension after beating Mix evenly with 3% dihydroquinoline; finally, pass through the flow delivery system of the paper machine, form it on the paper machine, and dry it to produce the asbestos latex sheet.

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PUM

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Abstract

The invention provides a method for preparing asbestos latex sheets. The method comprises the following steps: dispersing asbestos fiber in water, beating the asbestos fiber suspension with the beating degree being controlled to 60 to 85 DEG SR (Schopper-Riegler); secondly, adding chelating agent, fillers, carbon black, latex, vulcanizing agent and ageing inhibitor to the beaten asbestos fiber suspension and evenly mixing; and finally, feeding into a flow system of a paper machine, papermaking forming on the paper machine, drying and obtaining the asbestos latex sheets. In the prior art, the asbestos fiber needs to be beaten during the production of the asbestos latex sheets, so that flocculation can be generated between latex under the action of high-valence metal ions generated during the beating process, and the performance of the asbestos latex sheets can be affected. By adding chelating agent to the asbestos fiber suspension, the invention is subject to the chelation between the high-valence metal ions and the chelating agent, thereby reducing or eliminating the influence of high-valence metal ions on latex in the surface adsorption of the asbestos fiber.

Description

technical field [0001] The invention belongs to the intersecting field of rubber industry and papermaking industry, and specifically relates to a preparation method of asbestos latex scissor board. Background technique [0002] Asbestos is a general term for naturally occurring hydrous silicates. Asbestos can be divided into chrysotile and crocidolite according to the mineral composition. Asbestos in the form of fibers is called chrysotile, which is the most abundant mineral fiber in nature. The fiber raw material used in the production of asbestos latex sheet is chrysotile, whose chemical formula is Mg 3 Si 2 o 3 (OH), however, asbestos fibers often contain FeO, Fe 2 o 3 、Al 2 o 3 , CaO, MnO 2 、Cr 2 o 3 And other impurities, some of these impurities directly enter the crystal lattice, replace part of the Mg in the structure, form a homogeneous mixture of substances, and some are mechanical mixtures, distributed in asbestos fibers, so that asbestos fibers are posit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F13/00D21H21/06D21H17/67D21H17/68D21H17/63D21H17/35D21H17/37D21H17/07D21H17/14
Inventor 夏新兴郭娜娜修慧娟成艳娜祝叶
Owner SHAANXI UNIV OF SCI & TECH