The nitrile skeleton oil seal has a wide range of applications, and the physical requirements of the skeleton oil seal in different applications are very different, such as hardness. Nitrile reclaimed rubber has excellent oil resistance and can replace nitrile rubber to produce low-cost skeleton oil seals. When using nitrile reclaimed rubber to reduce the production cost of skeleton oil seals, it is necessary to select the appropriate nitrile reclaimed rubber according to the specific use occasions and index requirements of the oil seal, and reasonably determine the amount of nitrile reclaimed rubber. So what indicators need to be considered when nitrile reclaimed rubber replaces original rubber to produce skeleton oil seals?
1. Oil resistance
The degree of swelling of the rubber seal in the medium directly affects the sealing effect. The swelling of the seal in different media is different. The nitrile oil seal cannot swell in the oil medium, otherwise the sealing effect of 2YLYY330 will be lost. When using nitrile reclaimed rubber to reduce the cost of raw materials for nitrile skeleton oil seals, choose a nitrile reclaimed rubber with high rubber content and high oil resistance as much as possible to better ensure the sealing effect and service life of the nitrile oil seal.
2. Tensile strength: The tensile strength of the nitrile skeleton oil seal generally decreases with the increase of temperature. When selecting the nitrile reclaimed rubber used for the skeleton oil seal, the maximum use temperature of the oil seal and the mechanical performance changes of the skeleton oil seal at the maximum temperature must be considered, especially the tensile strength.
3. Hardness
As we all know, the hardness of the skeleton oil seals for different purposes on the market varies greatly. The hardness of the skeleton oil seal should be determined according to the roughness of the sealing surface. When the sealing surface is rough, oil seal products with low hardness should be selected. In actual production, fully consider the hardness of the nitrile reclaimed rubber and the hardness of the finished oil seal to prevent the parts of the nitrile oil seal that are subjected to higher sealing pressure from being extruded by high pressure; at the same time, it is necessary to consider that the hardness of the nitrile reclaimed rubber and the oil seal will increase with temperature. High and falling.
4. Wear resistance: When using nitrile reclaimed rubber to produce rubber oil seals, the better the wear resistance, the better the sealing performance of the nitrile oil seal and the longer the service life; otherwise, it will seriously affect the sealing effect and shorten the service life of the oil seal.
5. Permanent deformation: Once the nitrile reclaimed rubber oil seal is permanently deformed under the action of external force for a long time, the sealing effect will be greatly reduced. Therefore, when selecting reclaimed rubber for nitrile oil seals, it is recommended to choose nitrile reclaimed rubber with small permanent deformation, high elasticity and good resilience. If necessary, the permanent deformation of the rubber can be further reduced by adjusting the oil seal formula.
6. Temperature resistance: When using nitrile reclaimed rubber to reduce the production cost of nitrile oil seals, rubber product manufacturers also need to consider the working temperature of the oil seal and the high and low temperature resistance of the reclaimed rubber, and fully consider the working temperature of the oil seal and the reciprocating movement. After the temperature is raised, the suitable temperature range of the nitrile oil seal can be further expanded by adjusting the formula after selecting the appropriate nitrile reclaimed rubber.
In actual production, nitrile reclaimed rubber can be used alone in the production of skeleton oil seals, or it can be used together with nitrile virgin rubber. Later editors will continue to share with you various application skills of nitrile reclaimed rubber in oil seals.
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