Low-leakage high-temperature resistant asbestos-free plate or cushion

Abstract

The invention discloses an asbestos-free plate or an asbestos-free cushion and a preparation method thereof. The asbestos-free plate or the asbestos-free cushion comprises, by weight ratio, rubber 8-15%, fibers 5-10%, graphite fillers 10-60%, high abrasion resistant carbon black 5-30% and addition agent 2-5%. The asbestos-free plate and the asbestos-free cushion do not contain asbestos materials and adopt specific components and specific contents, thereby resolving the technical problem that materials do not adopt asbestos, having high-temperature resistant performance superior to the performance of the asbestos materials and higher sealing performance, achieving perfect substitution of corresponding asbestos products and enabling the sealing performance to be remarkably improved.

Description

technical field

[0001] The invention relates to a sealing pad or sealing plate, in particular to a low-leakage, high-temperature-resistant non-asbestos sealing plate or sealing pad. Background technique

[0002] In the sealing of seals, such as flange seals, engine cylinder head seals, etc., because asbestos has many excellent properties, especially its temperature range can be between -30 and +510°C, asbestos boards and asbestos pads are used in It is widely used in sealing.

[0003] Asbestos mats are made of asbestos fiber and rubber as the main raw materials, supplemented with rubber compounding agent and filler, and are made through mixing, hot roll forming, vulcanization and other processes. Asbestos fiber gaskets can be divided into ordinary rubber gaskets and oil-resistant asbestos rubber gaskets according to their formula, process performance and application. Because the asbestos pad has: (1) good sealing performance; (2) superior corrosion resistance; (3) operatin...

Images