General sealant has good elasticity, aging resistance, chemical resistance, etc., and is suitable for the production of various rubber sealing products, generally processed with natural rubber, styrene-butadiene rubber and other main raw materials. Tire reclaimed rubber is made of waste tires through physical and chemical processes, with the basic performance characteristics of rubber, the main components are natural rubber, general synthetic rubber and carbon black, can it be used in the production of general sealant? How do I add the right one? How to design the vulcanization formula of general sealant containing tire reclaimed rubber?
1. The way of adding tire reclaimed rubber in general sealant compounds
When the general sealant material uses reclaimed rubber to reduce costs, some medium and low-end products can completely use tire reclaimed rubber; Sealant material for medium and high-end products can be used in combination with natural rubber and styrene-butadiene rubber in an appropriate proportion to reduce the cost of raw materials on the premise of ensuring product quality. In actual production, the ultra-fine reclaimed rubber on the top of the tire tire has high fineness, good elasticity, strong strength, aging resistance and tear resistance, which is an ideal raw material for the production of rubber extrusion sealing strips, O-rings and other products.
2. Natural rubber/tire reclaimed rubber is used together to produce a general rubber vulcanization formula
100 parts of natural rubber, 40 parts of tire reclaimed rubber, 12 parts of zinc oxide, 2 parts of stearic acid, 1 part of antioxidant D, 30 parts of mixed carbon black, 60 parts of spray carbon black, 15 parts of engine oil, 0.5 parts of accelerator M, 0.4 parts of accelerator TMTD, 2.3 parts of sulfur; Total 263.2 copies.
3. Styrene-butadiene rubber/tire reclaimed rubber is used to produce a general rubber vulcanization formula
100 parts of styrene-butadiene rubber, 20 parts of tire reclaimed rubber, 5.5 parts of zinc oxide, 1.2 parts of stearic acid, 1 part of antioxidant 4010NA, 30 parts of carbon black N550, 33 parts of carbon black N774, 40 parts of clay, 24 parts of aromatic oil, 14 parts of petroleum asphalt, 5.5 parts of petroleum jelly, 0.18 parts of accelerator D, 1.6 parts of accelerator DM, 2.3 parts of sulfur; Total: 278.28 copies.
When the general sealant is mixed with tire reclaimed rubber, the use and use conditions of the sealant need to be clarified, the physical properties such as hardness, tensile strength, elongation and other requirements, as well as the chemical properties such as aging resistance, oil resistance, temperature resistance and other requirementsE4LYY227, reasonably determine the mixing ratio of reclaimed rubber, and increase the amount of reclaimed rubber as much as possible to improve economic benefits under the premise of meeting the performance requirements; The formulation design should take into account the feasibility of the processing technology to ensure that the compound is easy to process and form.
Reasonably design the general sealant formula containing tire reclaimed rubber, appropriately adjust the variety and dosage of compounding agent in each compounding system of the formula, especially the vulcanization system, reinforcing system and softening plasticization system, and can prepare general sealant compounds of different hardness to meet the needs of more rubber sealing products, and discuss related issues with you in the future.
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