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

An asbestos-free and fluororubber-free technology, which is applied in the field of gaskets or sealing plates, can solve problems such as poor sealing performance (poor leakage rate), and achieve the effects of improved sealing performance, high sealing performance, and optimized product performance

Active Publication Date: 2012-02-22
JIANGSU SEALSTARS SEALING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the tightness (leakage rate) is very poor (≥10ml / s nitrogen), the standard is 2.0×10 -2 ml / s

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Prepare materials according to the following specific compositions and proportions, and the percentages of all substances are mass percentages:

[0045]

[0046] Prepare asbestos-free panels as follows:

[0047] (1) Mixing material: DF-JBJ800 flip mixing machine is used, with a charging capacity of 250-300kg, according to the specific feeding sequence of powder → carbon fiber → organic fiber → rubber → mineral fiber → vulcanizing agent, and then carry out mixing. The material temperature is 55°C, the mixing time is 4 hours, and the aging time is 5 hours;

[0048] (2) Sheeting: CKCJ-1.3×1.590 CNC sheeting machine is adopted, the temperature of the large roll is controlled at 80°C, the temperature of the small roll is 6°C, the speed of both large and small rolls is 30 m / min, the line pressure of sheeting is 5 tons, and the speed of the advancing and retreating rolls It is 18, and the large and small rolls of the sheet forming machine are both steamed and cooled.

[0...

Embodiment 2

[0054] Prepare materials according to the following specific compositions and proportions, and the percentages of all substances are mass percentages:

[0055]

[0056] Prepare asbestos-free panels as follows:

[0057] (1) Mixing material: DF-JBJ800 flip mixing machine is used, with a charging capacity of 250-300kg, according to the specific feeding sequence of powder → carbon fiber → organic fiber → rubber → mineral fiber → vulcanizing agent, and then carry out mixing. The material temperature is 50°C, the mixing time is 4 hours, and the aging time is 4.5 hours;

[0058] (2) Sheeting: CKCJ-1.3×1.590 CNC sheeting machine is used, the temperature of the large roll is controlled at 90°C, the temperature of the small roll is 6°C, the speed of the large and small rolls is 30 m / min, the line pressure of the sheet is 4 tons, and the speed of the advancing and retreating rolls It is 20, and the large and small rolls of the sheet forming machine are both steamed and cooled.

[00...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): C04B26/10C04B14/38C04B16/06
Inventor 倪焕军于智发
Owner JIANGSU SEALSTARS SEALING TECH CO LTD
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