Tire reclaimed rubber has a wide range of raw materials and low product prices. It is widely used in the production of various rubber products. In actual production, a certain proportion of tire reclaimed rubber can be blended in a common rubber compound with natural rubber or styrene-butadiene rubber as the main raw material, and rubbers of different hardness can be prepared by adjusting the amount of tire reclaimed rubber and the type and amount of compounding agents. It can effectively reduce the cost of raw materials under the premise of ensuring the quality of rubber products.
1. Reference formula of common rubber compound mixed with wheel reclaimed rubber
Formula 1: 80 parts of natural rubber, 40 parts of reclaimed tire rubber, 4 parts of zinc oxide, 1.5 parts of stearic acid, 0.6 parts of antioxidants, 1.3 parts of paraffin wax, 56 parts of carbon black, 4 parts of heavy calcium, 15 parts of rubber oil, promoting Agent 0.75 parts, sulfur 1.85 parts; total 205 parts; hardness about 40 degrees.
Formulation 2: 90 parts of styrene butadiene rubber, 16 parts of reclaimed tire rubber, 4.8 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant, 2 parts of paraffin, 56 parts of carbon black, 36 parts of clay, 21 parts of rubber oil, petroleum 12 parts of asphalt, 5 parts of petroleum jelly, 1.5 parts of accelerator, 2 parts of sulfur; a total of 248.3 parts; hardness of about 55 degrees.
Formula 3: 60 parts of styrene-butadiene rubber, 80 parts of reclaimed tire rubber, 5 parts of zinc oxide, 1.2 parts of stearic acid, 1 part of antioxidant, 45 parts of carbon black, 5 parts of rubber oil, 1.5 parts of accelerator, 2.3 parts of sulfur; A total of 201 parts; the hardness is about 65 degrees.
Formula 4. 90 parts of styrene-butadiene rubber, 20 parts of reclaimed tire rubber, 4.8 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant, 2 parts of paraffin, 105 parts of carbon black, 17 parts of rubber oil, 1.7 parts of accelerator, 2.1 parts of sulfur; 244.6 parts in total; hardness of about 70 degrees.
2. Skills for adjusting the hardness of common rubber materials containing tire reclaimed rubber
When natural rubber or styrene butadiene rubber and tire reclaimed rubber are used together to prepare ordinary rubbers with different hardnesses, rubber product manufacturers can adjust the hardness of the rubber by adjusting the type and amount of the reinforcing system compounding agent in the formula. Usually, the carbon in the high hardness rubber The amount of black 2LLYY1120 is large, and high wear-resistant carbon black is often used, or high wear-resistant carbon black is used together with fast pressing black and semi-reinforced carbon black; spray carbon black can be used in ordinary rubber with lower hardness, with a small amount Mixed gas carbon black.
In order to further increase the hardness of common rubber compounds containing tire reclaimed rubber, rubber product manufacturers can appropriately increase the amount of sulfur and accelerators, and increase the rubber hardness by increasing the cross-linking density of the rubber. Common accelerator combinations include accelerator M/TMTD , Accelerator D/DM, Accelerator M/D/CZ, etc.
3. Other matching systems for common rubber materials containing tire reclaimed rubber
When natural rubber or styrene-butadiene rubber is mixed with tire reclaimed rubber to prepare ordinary rubber, the softener can be engine oil, petroleum pitch, aromatic oil, etc. The anti-aging system can choose to use both physical protection and chemical protection. Paraffin wax is used with anti-aging agent D, anti-aging agent 4010NA, etc.
When adjusting the hardness of the ordinary rubber compound containing tire reclaimed rubber through the formula, the design of the rubber product formula also needs to pay attention to the influence of each matching system on the rubber's other mechanical strength, mixing process, and vulcanization performance. The editor will have the opportunity to discuss with you later.
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