EPDM rubber powder is made from the scrap produced from the production of waste ethylene-propylene products or ethylene-propylene products through multiple processes. It has similar performance to EPDM rubber and also has high temperature resistance and aging resistance. It is often used in the outdoor site laying of stadiums, runways, playgrounds, etc. It can also be used as a filler for the production of door and window seals, improving product performance and reducing raw material costs.
EPDM 100, EPDM 100, Zinc Oxide 5, Stearic Acid 1, General Furnace 70, Paraffin 10, Black Ointment 10, Accelerator TT1.2, Accelerator M 1.2, Accelerator ZDMC 2.0, sulfur 1.5.
The rubber fillers commonly used in rubber products are carbon black, calcium carbonate, clay, etc. These fillers are used in the production of rubber products and are controlled within a certain range. Once used excessively, they not only affect the physical indexes of rubber products, but also reduce the products. Use performance to shorten service life. The raw material for the production of EPDM rubber powder is waste ethylene-propylene rubber products, so the EPDM rubber powder has a certain content of ethylene-propylene, and it is more compatible with EPDM rubber. It can be used in a large amount. The production of ethylene-propylene seals does not affect the physical properties and service life of the seals. Moreover, the door and window seals produced with EPDM seals have higher glue content, better physical and mechanical properties, and stronger weather resistance. The compression set is small and the product has a longer service life.
Although EPDM rubber powder can be added in a large amount as a filler, it cannot increase the amount of rubber powder endlessly in order to reduce the cost. If the amount of rubber powder is too much, the various indexes of the sealing strip will be lowered, which will affect the product performance. After many tests, when the ratio of rubber powder to EPDM is 1:1, the physical and mechanical properties of the door and window seals are the best, which can achieve the best use effect.
In the formulation of the door and window sealing strip filled with EPDM rubber powder, the fineness of the ethylene-propylene rubber powder is very important for the performance and appearance of the sealing strip. The door and window sealing strip produced by using the higher the fineness of the EPDM rubber powder is resistant to high and low temperature. The better the anti-aging performance, the higher the tensile strength and the elongation at break; the high-fineness ethylene-propylene rubber powder can also improve the brightness of the surface of the sealing strip. The epoxy powder of this formula is 60 mesh, the tensile strength of the processed sealing strip is 6.67 MPa, and the elongation at break is 518%; the sealing strip is resistant to high and low temperature, good anti-aging performance and small compression set; The product looks smooth and shiny.
In order to improve the processing performance and performance of the door and window sealing strip, the choice of compounding agent is also very important. The general furnace black structure used in the formula is higher, the particle size is slightly smaller, and it is easy to disperse in the rubber compound, which can also improve the smooth surface of the sealing strip. Degree; its processing performance is good, the impact on the hardness of the sealing strip is small, even if the dosage is increased, the hardness of the sealing strip will not fluctuate greatly, and it will not affect the performance of the product. Black ointment used as a seal strip softener can improve the elasticity and softness of the product and play a plasticizing role; black ointment has a certain influence on the pressure change, and the reasonable amount can greatly improve the resistance of the seal strip to pressure and deformation.
The door and window sealing strip produced by using ethylene propylene rubber powder as filler has strong physical and mechanical properties, high and low temperature resistance, good aging resistance, stronger weather resistance, less compression deformation and longer service life of the sealing strip; and ethylene propylene rubber powder as Fillers can be added more, and the production cost of seals is also significantly reduced; seal manufacturers who want to improve product performance and reduce production costs can try.