Radial truck tire air-tight layer component and preparation process thereof
A radial tire and preparation process technology, applied in tire parts, reinforcement layers of pneumatic tires, vehicle parts, etc., can solve the problems of poor rubber layer uniformity and structural dimensional stability, low green strength of raw rubber, etc. Intensity, reduction of material deformation or movement, effect of radiation dose reduction
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Embodiment 1
[0021] Rubber formula for inner liner parts of radial truck tires: 80 parts of bromobutyl rubber, 20 parts of natural rubber, 60 parts of carbon black N660, 2 parts of stearic acid, 4 parts of zinc oxide, 1.2 parts of antioxidant 4020 (6PPD), insoluble 1 part of sulfur, 1.5 parts of accelerator MBTS (DM), 8 parts of rubber softener (P-150).
[0022] Mix the rubber base material, anti-aging system, reinforcing system and additives with an internal mixer according to the above formula. The mixing temperature range is 145-155°C, and the mixing time is 5 minutes. Mix the rubber evenly and discharge Then add vulcanization system to the open mill for masticating, the temperature range is 100-110 ° C, and the time is 3 minutes to complete the preparation of the mixed rubber, and it is calendered according to the production process of the inner liner of the truck radial tire to make an inner liner sheet material, the thickness is 4mm, the inner liner sheet is placed in the cobalt sour...
Embodiment 2
[0025] Rubber formula for inner liner parts of radial truck tires: bromobutyl rubber 72 parts, natural rubber 8 parts, high-cis polyisoprene rubber 20 parts, carbon black N660 60 parts, stearic acid 3 parts, zinc oxide 5 parts 3 parts, anti-aging agent 4020 (6PPD) 3 parts, insoluble sulfur 2.0 parts, accelerator MBTS (DM) 1.5 parts, rubber softener (P-150) 10 parts.
[0026] The rubber material mixing process, the calendering preparation process of the airtight layer components, and the radiation pretreatment process are the same as in Example 1. After testing, the Green strength of the rubber sheet has increased to 2.1MPa, the elongation at break is 900%, and the nitrogen permeability is 1.42×10 -17 / [m 2 ·(Pa·s) -1 ], proving that the use of radiation pretreatment technology to pre-vulcanize the inner liner components can not only significantly improve the quality of the product, but also effectively reduce the amount of natural rubber, and has little effect on the mechani...
Embodiment 3
[0028] Rubber formula for inner liner parts of radial truck tires: bromobutyl rubber 72 parts, natural rubber 8 parts, high-cis polyisoprene rubber 20 parts, carbon black N660 60 parts, stearic acid 2 parts, zinc oxide 5 parts 3 parts, anti-aging agent 4020 (6PPD) 3 parts, insoluble sulfur 0.7 parts, accelerator MBTS (DM) 1.5 parts, rubber softener (P-150) 10 parts; radiation crosslinking sensitizer tetraethylene glycol dimethacrylate 10 parts of ester.
[0029] The rubber material mixing process and the calendering preparation process of the airtight layer parts are the same as in Example 1. In the radiation pretreatment process, the inner liner sheet is placed in the cobalt source chamber, and the radiation treatment is carried out in the air. The dose rate is 8kGy / h, and the radiation dose of the inner liner sheet is 10kGy. Preparation of Dense Layer Parts.
[0030] After testing, the Green strength of the rubber sheet can reach 1.8MPa, the elongation at break is 940%, an...
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