Solid rubber sealing strip is a strip sealing product processed from rubber as the main raw material, with a solid structure inside, which is widely used in automobiles, building doors and windows, industrial equipment, etc., through its own elasticity and the surface of the installation part (such as glass, metal parts, etc.) to generate contact pressure to achieve sealing effect and prevent the leakage or intrusion of liquid, gas, dust and other media. When using natural rubber as the main raw material to produce solid rubber sealing strips, the rational use of tire reclaimed rubber can effectively reduce the cost of raw materials.
1. Tire reclaimed rubber produces vulcanization formula for solid core sealing strips
Formula 1: 70 parts of natural rubber, 30 parts of tire reclaimed rubber, 4 parts of zinc oxide, 2 parts of stearic acid, 1.2 parts of antioxidant A, 1.8 parts of paraffin, 45 parts of spray carbon black, 50 parts of light calcium carbonate, 1 part of dibutyl phthalate, 0.4 parts of accelerator DM, 1.2 parts of accelerator M, 2.3 parts of sulfur; Total 208.9 copies.
Formula 2: 50 parts of natural rubber, 50 parts of tire reclaimed rubber, 3.5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant D, 30 parts of spray carbon black, 75 parts of light calcium carbonate, 80 parts of heavy calcium carbonate, 5.5 parts of heavy oil, 0.2 parts of accelerator M, 0.7 parts of accelerator DM, 2 parts of sulfur; Total 298.9 copies.
Formula 3: 15 parts of natural rubber, 10 parts of butadiene rubber, 75 parts of tire reclaimed rubber, 5 parts of zinc oxide, 0.5 parts of stearic acid, 1 part of antioxidant A, 1 part of paraffin, 10 parts of carbon black N330, 25 parts of light calcium, 10 parts of engine oil, 10 parts of industrial fat, 0.25 parts of accelerator D, 0.4 parts of accelerator DM, 1.35 parts of accelerator M, 0.1 part of accelerator TMTD, 2 parts of sulfur; Total 166.6 copies.
2. Key points of formula design of solid core sealing strip for tire reclaimed rubber production
When using tire reclaimed rubber to reduce the production cost of solid core sealing strips, tire tread reclaimed rubber is selected, which has higher effective rubber hydrocarbon content and greater mechanical strength; When the rubber sealing strip is required to be environmentally friendly, it is recommended to choose an environmentally friendly tire reclaimed rubber E4LYY710 that can provide relevant test reports; Appropriate use of ointment, mineral oil, clay, stearic acid, etc., to improve the plasticity and fluidity of the rubber compound, reduce the scorching phenomenon during extrusion, and improve the extrusion speed; If necessary, add an appropriate amount of supporting compounding agent, such as polymer wax, modified plastic, etc., which can make the finished rubber strip have good stiffness and small deformation, and improve the appearance quality and structural dimensional stability.
In actual production, the application field of solid core sealing strip is very wide, many products have strict requirements for heat resistance, ozone resistance, oil resistance of rubber compounds, commonly used EPDM rubber, nitrile rubber, etc., at this time can also be mixed with tire reclaimed rubber? The editor will continue to discuss related issues with you in the future.
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