Compressibility ofCompressibility of hydraulic seals

Vulcanized rubber, thermoplastic rubber at room temperature, high temperature and low temperature conditions, the provisions of the compression rate, after a certain compression time, can determine the amount of rubber deformation.

Different rubber hydraulic seal hardness of the compression rate is different, when the rubber international hardness value of 10 ~ 80 when the compression rate of 25%, when the international hydraulic rubber seals more than 80 hardness, 80 ~ 89 and 90 ~ 95 The compression rates were 15% and 10%, respectively. This applies to the determination of the compression set of the rubber under liquid action.

Hydraulic seals rubber in the compressed state, will inevitably occur physical and chemical changes. When the compressive force disappears, these changes prevent the rubber from returning to its original state, thus producing a compression set. The size of the compression set depends on the temperature and time in the compressed state and the temperature and time at which the height is restored. At high temperatures, the chemical change is the main cause of rubber compression set permanent deformation. Compression set is measured after removal of the compressive force applied to the specimen and recovery of the height at the standard temperature. At low temperatures, the changes caused by glass-like hardening and crystallization are predominant. When the temperature rises, these effects will disappear. The height of the specimen must therefore be measured at the test temperature.

Hydraulic seals different characteristics of different test standards, such as rubber hydraulic seals at higher or lower than normal temperature test temperature of the test standard GB / T9868-88, vulcanized rubber - compression effect of the determination of the crystallization effect of ISO 6471-1994. hydraulic seals

Vulcanized rubber, thermoplastic rubber at room temperature, high temperature and low temperature conditions, the provisions of the compression rate, after a certain compression time, can determine the amount of rubber deformation.

Different rubber hydraulic seal hardness of the compression rate is different, when the rubber international hardness value of 10 ~ 80 when the compression rate of 25%, when the international hydraulic rubber seals more than 80 hardness, 80 ~ 89 and 90 ~ 95 The compression rates were 15% and 10%, respectively. This applies to the determination of the compression set of the rubber under liquid action.

Hydraulic seals rubber in the compressed state, will inevitably occur physical and chemical changes. When the compressive force disappears, these changes prevent the rubber from returning to its original state, thus producing a compression set. The size of the compression set depends on the temperature and time in the compressed state and the temperature and time at which the height is restored. At high temperatures, the chemical change is the main cause of rubber compression set permanent deformation. Compression set is measured after removal of the compressive force applied to the specimen and recovery of the height at the standard temperature. At low temperatures, the changes caused by glass-like hardening and crystallization are predominant. When the temperature rises, these effects will disappear. The height of the specimen must therefore be measured at the test temperature.

Hydraulic seals different characteristics of different test standards, such as rubber hydraulic seals at higher or lower than normal temperature test temperature of the test standard GB / T9868-88, vulcanized rubber - compression effect of the determination of the crystallization effect of ISO 6471-1994.