Ordinary rubber sheets are vulcanized with rubber (natural rubber, styrene-butadiene rubber, butadiene rubber or recycled rubber) as the main material. The rubber content is generally controlled among 20% and 40%, and the practical range is very wide. It needs to be adjusted according to the performance requirements. In actual production, a large amount of reclaimed rubber can be used in the production of ordinary rubber sheets with a rubber content of 20%. Commonly used reclaimed rubbers include tire reclaimed rubber and rubber shoe reclaimed rubber.
1. Tread reclaimed rubber/rubber shoe reclaimed rubber production with a rubber content of 20% ordinary rubber sheet formula
5 parts of styrene-butadiene rubber, 5 parts of cis-butadiene rubber, 80 parts of tread reclaimed rubber, 100 parts of rubber shoe reclaimed rubber, 3 parts of zinc oxide, 1.2 parts of stearic acid, 1 part of anti-aging agent, 1.2 parts of paraffin wax, 9 parts of carbon black N330 , 20 parts of clay, 50 parts of light calcium, 55 parts of heavy calcium, 2 parts of pine tar, 2 parts of industrial grease, 0.2 parts of accelerator DM, 0.2 part of accelerator TMTD, 1.2 parts of sulfur; total: 336 parts.
2. Completely use tread reclaimed rubber to produce ordinary rubber sheet formula with a rubber content of 20%
Tire tread reclaimed rubber 100 parts, zinc oxide 1.25 parts, stearic acid 0.25 parts, antioxidant D 0.25 parts, light calcium 25 parts, paraffin wax 3.75 parts, accelerator DM 0.5 parts, sulfur 1.25 parts, total: 132.25 parts. Basic indicators of vulcanizate: hardness 65 degrees, tensile strength 3.45MPa, elongation at break 150%.
3. A large number of reclaimed rubber is used to produce 20% of ordinary rubber sheet formula adjustment skills
When a large amount of tire reclaimed rubber or rubber shoe reclaimed rubber is used to produce ordinary industrial rubber sheets with a rubber content of about 20%, sulfur vulcanization is generally used, and the dosage is controlled 1-2.5 parts. ) with accelerator D, or with a small amount of accelerator TMTD. To improve the physical and mechanical properties of the compound 2ELYY31, it is necessary to add more reinforcing agents and fillers in the formula, such as calcium carbonate, clay, barite powder, carbon black, etc. Appropriate use of oil, coumarone resin, pine tar and other softeners to further adjust the performance process and hardness of the rubber compound.
4. Reclaimed rubber and high styrene, high pressure polyethylene and other plastics are used together to produce rubber sheets
When a large number of reclaimed rubber is used to produce ordinary rubber sheets with a low rubber content of 20%, rubber product manufacturers can also use rubber and plastic to produce rubber sheets, which can improve some properties of the rubber sheets and increase the service life of the rubber sheets. Ordinary rubber sheets with low rubber content generally use tire reclaimed rubber, rubber shoe reclaimed rubber, or use together with general-purpose rubber; according to the principle of combining polymers, plastics with solubility parameters close to rubber should be selected, such as high styrene, high pressure polyethylene, etc., follow-up The editor will discuss with you in detail the production process skills and formula design points of rubber and plastic combined to produce ordinary rubber sheets.
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