The middle layer rubber and the inner layer glue in the wear-resistant suction hose generally use natural rubber as the main raw material, and the proper amount of reclaimed rubber can be added to the middle layer glue or the inner layer glue formula to reduce the cost; then what is the natural rubber and the reclaimed rubber? What proportion of the sample is used? How to choose the natural rubber/recycled rubber to produce the rubber in the suction hose and the compounding agent in the inner rubber. How to determine the dosage of various compounding agents?
1. Natural rubber / reclaimed rubber used in the production of suction hose middle layer rubber formula
Natural rubber, 100 parts; recycled rubber, 100 parts; zinc oxide, 5 parts; stearic acid, 3 parts; sulfur, 3 parts; accelerator, 2.4 parts; anti-aging agent, 2 parts; pine tar, 5 parts; rosin, 2 parts; calcium carbonate, 150 parts; clay, 15 parts; carbon black, 20 parts; total: 407.4 parts.
2. Natural rubber/recycled rubber is used to produce the inner rubber layer of the suction hose.
Natural rubber, 100 parts; recycled rubber, 100 parts; zinc oxide, 5 parts; stearic acid, 3 parts; sulfur, 3 parts; accelerator, 1.2 parts; anti-aging agent, 2 parts; pine tar, 5 parts; 5 parts; calcium carbonate, 135 parts; paraffin, 1 part; carbon black, 40 parts; total: 400.2 parts.
When the natural rubber/recycled rubber is used to produce the rubber layer and the inner layer rubber of the suction hose, the rubber product manufacturer can use the natural rubber and the reclaimed rubber in a ratio of 1:1, which can ensure the good mechanical strength, wear resistance and resistance of the suction hose. The tearing property can also effectively reduce the production cost.
In the vulcanization system, the accelerator M and the accelerator DM can be used in combination, and the accelerator M has a low critical temperature and is prone to early vulcanization. The vulcanization temperature of the accelerator DM is high and the after-effect is remarkable, and the vulcanization speed can be improved and the vulcanization safety can be improved. In the reinforcing filling system, semi-reinforcing carbon black can be selected as the ideal reinforcing agent, which has the dual functions of reinforcing and filling, and the large amount of filling with light calcium carbonate reduces the production cost. Anti-aging agent may choose anti-aging agent A and anti-aging agent D, wherein anti-aging agent A has a good protective effect on thermal oxygen, flexion and fatigue aging, and has certain resistance to ozone aging and harmful metals; anti-aging agent D causes thermal oxygen The aging protection effect is obvious, and the combination of the two can prolong the service life of the suction hose.
Many manufacturers who choose natural rubber/recycled rubber and use suction hoses to produce rubber hoses at the beginning are completely using natural rubber. If reclaimed rubber is added to the natural rubber suction hose formula, it must be adjusted according to the composition of the reclaimed rubber and the effective rubber hydrocarbon content. To ensure the performance and service life of the suction hose. At present, the suction hose manufacturer with styrene-butadiene rubber as the main raw material will also use the right amount of reclaimed rubber in the formulation. What unexpected effects will this have?