The reasonable use of EPDM in the production of rubber valve seals can not only ensure the sealing performance and service life of valve seals, but also reduce the production cost of rubber products. The tensile properties, hardness, and compressive properties of EPDM recycled rubber are important indicators affecting valve seals, but the factors affecting the comprehensive indicators of valve seals are not only the above? Using EPDM recycled rubber to reduce the production cost of valve seals There are still many points to be noticed in the selection and production process.
4. Aging resistance of EPDM recycled rubber
Valve seals need to withstand one or more environmental factors such as oxygen, ozone, heat and light during the work process. The biggest feature of EPDM and EPDM recycled rubber is its excellent aging resistance, of which recycled rubber The content of EPDM in ethylene directly affects the aging resistance of rubber compounds. When using EPDM recycled rubber instead of original rubber to produce valve seals 2LLYY0310 that have strict requirements on aging resistance, choose EPDM recycled rubber with a high rubber content as much as possible, reasonably control the amount of recycled rubber, and use it in the formula Properly increase the amount of antioxidants to further improve the aging resistance of valve seals.
5. Low temperature flexibility of EPDM recycled rubber
Some rubber seals will be used under low temperature conditions, and poor low temperature flexibility will directly affect the service performance and life of valve seals. The so-called low-temperature flexibility is the bending performance of the rubber sample according to a specified angle after freezing for a period of time under specific low-temperature conditions. When using EPDM recycled rubber to produce valve seals that work under low temperature for a long time, the low temperature flexibility of the recycled rubber needs to be considered. (Ethylene-propylene content in ternary ethylene-propylene recycled rubber affects the low-temperature flexibility of the rubber to a certain extent)
6. Glue content of EPDM recycled rubber
The content of ethylene-propylene rubber in EPDM recycled rubber determines to a large extent the mechanical strength, compressibility, and aging resistance of the rubber. The higher the rubber content, the better the various indicators. When using EPDM recycled rubber to replace raw rubber, rubber product manufacturers also need to determine the replacement ratio of EPDM raw rubber according to the content of recycled rubber, and determine the blending of EPDM recycled rubber according to the actual needs of valve seals. Dosage.
The rubber valve seals produced using EPDM recycled rubber or EPDM rubber have good ozone resistance, heat resistance, low temperature resistance, and corrosion resistance. In fact, EPDM recycled rubber can not only be used to replace EPDM rubber to produce valve seals, but also be used in small amounts to produce oil-resistant seals in nitrile rubber to improve the ozone resistance and weather resistance of valve seals. Sex, etc. In the later period, the editor will continue to share with you the blending of EPDM recycled rubber in valve seals, rubber mixing process and vulcanization process skills.