Low-fiber-content high-filler-content sealing pad

A technology for sealing gaskets and inorganic fillers, which is used in the processing of fiber raw materials, the addition of non-polymer organic compounds, and the synthesis of cellulose/non-cellulose material pulp/paper. The problem of high raw material prices, to achieve the effect of good liquid resistance, simple formula, and cheap raw materials

Inactive Publication Date: 2013-03-20
姚家祥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also the problems of high raw material prices and excessive fiber consumption, and sepiolite is an asbestos-like fiber, not a completely asbestos-free material
[0011] The Chinese invention patent application with the publication number CN1847355A discloses a non-asbestos fiber-based sealing material and its preparation method. The disadvantage of this method is that more than 5 kinds of fibers are used at the same time, and they are put together for soaking, wheel grinding, and disc grinding. , beating
As far as the existing technology is concerned, simply reducing the amount of fiber will often be broken or damaged during production, which is also one of the reasons why fiber is generally used in the prior art.

Method used

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  • Low-fiber-content high-filler-content sealing pad
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  • Low-fiber-content high-filler-content sealing pad

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: take by weighing respectively

[0030]

[0031] Add 1000Kg 3.2% concentration of pulp suspension, then add 6Kg carbon black, 1.2Kg zinc oxide, 1.2Kg sulfur, 0.8Kg accelerator TMTD, 0.4Kg anti-aging agent D pre-ground slurry, stir evenly , add 45Kg of latex with 40% solid content while stirring; add 15Kg of titanate, stir and mix, add water to dilute to make a slurry with a concentration of 2.5%, take it out by paper machine, dehydrate, dry, calender and vulcanize at 130°C, Made of low fiber high filler gasket.

Embodiment 2

[0032] Embodiment 2: take by weighing respectively

[0033]

[0034]Add 1400Kg 3.2% concentration of pulp suspension, then add 4Kg carbon black, 1.2Kg zinc oxide, 1.2Kg sulfur, 0.8Kg accelerator TMTD, 0.4Kg anti-aging agent D pre-ground slurry, stir evenly , add 35Kg of latex with 40% solid content while stirring; add 12Kg of titanate, stir and mix, add water to dilute to make a slurry with a concentration of 2.5%, take it out by paper machine, dehydrate, dry, calender and vulcanize at 130°C, Low-fiber high-fill gasket

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PUM

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Abstract

The invention relates to a low-fiber-content high-filler-content sealing pad which is free of asbestos and has the characteristics of liquid resistance, temperature resistance and low burning loss. The low-fiber-content high-filler-content sealing pad is prepared by the following steps: preparing a water suspension slurry from paper pulp, inorganic filler, latex, rubber ingredient and material structure reinforcer, forming by a handsheet former, dewatering, drying, calendering and vulcanizing. The slurry treated by the handsheet former is prepared from the following materials in percentage by mass: 7-20% of paper pulp, 65-85% of inorganic filler, 4-10% of latex and rubber ingredient, and 0.1-5% of material structure reinforcer. The low-fiber-content high-filler-content sealing pad has the advantages of high universality, simple formula, cheap and accessible raw materials, simple proportioning technique and strong cost price advantage.

Description

Technical field: [0001] The invention belongs to the technical field of sealing material preparation, in particular to an asbestos-free sealing backing plate with the performance characteristics of liquid resistance, temperature resistance and low ignition loss. Background technique: [0002] Sealing plates used as flat seals in sealing materials are divided into two categories: rolling plates and scissor plates due to different production processes, and are divided into two categories: asbestos plates and non-asbestos plates depending on whether the raw materials contain asbestos. Although asbestos board is still the main sealing material in my country's current sealing market, as people pay more attention to environmental protection, it is imperative to make sealing materials free of asbestos. However, there are still deficiencies in the field of asbestos-free sheet technology, which is very unfavorable for our country to move towards asbestos-free in an all-round way. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/10D21H13/26D21H21/18D21H17/05D21H17/67
Inventor 姚家祥姚天悦
Owner 姚家祥
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