In all reclaimed rubber products, latex reclaimed rubber has the best elasticity and the highest tear strength, tire reclaimed rubber, butyl reclaimed rubber, butyronitrile reclaimed rubber and EPDM reclaimed rubber all have certain Disparity: Some of them use EPDM reclaimed rubber production of rubber products for higher tear strength, so in order to improve the comprehensive performance and service life of EPDM reclaimed rubber products, we need to take measures to raise the ternary Tear reclaimed rubber tear strength.
Reclaimed rubber tear strength refers to the reclaimed rubber samples (with incision or rectangular) tearing the unit thickness and the load, is a measure of the quality of reclaimed rubber an important indicator of a direct impact on the use of recycled rubber products Performance and service life. The use of EPDM reclaimed rubber production rubber products, the temperature level, the curing system settings, the amount of reinforcing agent, softener dosage will affect the EPDM rubber products tear strength, so in the design of product formulations, Whether the temperature is set, or chemical additives with the amount of need to be carefully considered.
1, curing system
Reclaimed rubber products curing system design affect the rubber tear strength: polysulfide bond can improve the reclaimed rubber tear strength. EPDM reclaimed rubber products often use sulfur vulcanization system, rubber tear strength will increase with the increase of sulfur content, but the amount is too high will lead to EPDM rubber reclaimed tear strength decreased , So to control the amount of sulfur; accelerators can shorten the curing time and reduce the curing temperature, flatner which better promoter can effectively improve the EPDM rubber tear strength.
2, reinforcing system
EPDM renewable rubber products in the production process, to improve the cross-linking density of rubber can also improve the recycled rubber products tear strength, and reinforcing agent, filler can significantly improve the crosslinking density. Therefore, in order to improve the cross-linking density of EPDM reclaimed rubber products, the amount of reinforcing agent such as carbon black and white carbon black (light-weight EPDM reclaimed rubber products) can be added or added to the formula, Zinc oxide, etc., of which white carbon black can be used for a variety of light-colored, colored rubber products in the production.
3, softener
In the actual production, EPDM reclaimed rubber products too much softener dosage will reduce the tear strength of reclaimed rubber products, so it does not affect the EPDM rubber products under the premise of other indicators, you can By reducing the amount of softener way to improve the tear strength of products; the same time for the high tear strength of EPDM rubber products, the best use of aromatic oil, such as the tear strength of rubber oil, should not be avoided Use paraffin oil.
There are many ways to improve the tear strength of EPDM rubber products, waiting for us to discover and try. What is your best way?
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