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Anji Jiahe Fluorous Rubber Co.,Ltd

Add:Dahe Village, Xiaofeng Town, Anji County, Huzhou, Zhejiang, China (Mainland)

Con:Mr Hu




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Performance Of Low Temperature Sealing Of Fluorine Rubber

  Performance of low temperature sealing of fluorine rubber

  As we all know, most fluorine-containing polymers can be used in more than 200 ℃. This is because fluorine carbon is strong in fluorine polymer material, fluorine surrounds outside carbon to form strong protective layer, make it not by high temperature, oil and chemical medicament and oxygen destruction and attack. Therefore, it has very high stability. In fact, a large number of data published in the past are related to the high temperature, oil resistance, chemical corrosion resistance, oxidation and other aspects of the performance, very little involved in the performance of fluorine rubber at low temperature characteristics.

  In this paper, the low-temperature performance of fluorine rubber (equivalent to domestic fluorine rubber 26-41 and 246) is widely used in fluorine rubber as a discussion object, so that it can be applied to the sealing of cryogenic engineering in order to broaden its application temperature range and make the best use of it. On the surface, fluorine rubber in-20 ℃ about the loss of high elasticity of rubber, it in the dynamic use of the temperature limit of 29 ℃, in-32 ℃ around the harden brittle. This point, only from the polymer chemical concept to understand it: carbon bond compounds in the hydrogen atom replaced by fluorine atoms, carbon-carbon bond rotation barrier increased, the molecular bond caused by the corresponding changes, more stiff than the original. As a result, its low temperature resistance is correspondingly reduced. The glass temperature and brittle temperature of rubber are two concepts in rubber stopper.

  The details of the fluorine rubber are briefly described below. (1) The glass temperature of Viton type fluorine rubber is the temperature of fluorine rubber changing from glass state to high elastic state. When the temperature is lower than the glass temperature, fluorine rubber can not show high elasticity, but the performance of hard glass. (equivalent to domestic fluorine rubber 26-41) The glass temperature is-20 ℃, vitonb (equivalent to domestic fluorine rubber 246) is 0 ℃.

  (2) The brittle temperature of Viton type fluorine rubber is the maximum temperature when the specimen is damaged under certain conditions under low temperature. It is the characteristic temperature of rubber, but it can not represent the lower limit of working temperature of rubber and its products. By using the brittle temperature, it is possible to compare the low-temperature performance of different rubber materials or different formulations. The brittle temperature of domestic fluorine rubber 26-41 is about 32 ℃ (this data is obtained in 2mm thick sample). The brittle temperature of rubber has a great relationship with the thickness of the specimen, and the brittleness temperature of the sample is different under different thickness.

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ANJI JIAHE FLUOROURUBBER MADE PRODUCTS CO.,LTD is one of the leading China teflon sheet, PTFE sheet, teflon tube, PTFE tube, PTFE membrane manufacturers and suppliers, equipped with a productive teflon sheet factory, we are able to offer you cheap products. We welcome new and old customers from all walks of life to contact us for future business relationships and achieving mutual success!
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Address: Dahe Village, Xiaofeng Town, Anji County, Huzhou, Zhejiang, China (Mainland)
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