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

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. [...

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.

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