Tire reclaimed rubber is processed from waste tires as raw materials, has the basic performance characteristics of rubber, and is widely used in the production of ordinary industrial rubber sheets and special rubber sheets. When using tire reclaimed rubber to prepare ordinary industrial rubber sheets and special rubber sheets (such as oil-resistant, acid-alkali resistant rubber sheets), reasonably determine the mixing ratio of reclaimed rubber and appropriately adjust the formula, which can reduce more production costs on the premise of ensuring the performance of rubber sheets.
1. The mixing ratio of tire reclaimed rubber in industrial rubber sheet
Tire reclaimed rubber has good compatibility with natural rubber and synthetic rubber, and the proportion of reclaimed rubber in the rubber sheet formula for different use occasions needs to be adjusted according to the performance requirements of the finished rubber sheet. In actual production, a large number of tire reclaimed rubber can be mixed with ordinary industrial rubber sheets, and tire reclaimed rubber can be completely used for some products; When preparing oil-resistant rubber sheets, it is necessary to comprehensively consider the price advantage of reclaimed rubber and the demand for oil resistance, and it is recommended that tire reclaimed rubber and nitrile rubber be used together, and the mixing ratio of reclaimed rubber in 100 parts of nitrile rubber should be controlled within 50 parts; The ratio of natural rubber to reclaimed rubber in acid and alkali resistant rubber board is 1:1, which can not only ensure chemical resistance, but also reduce production costs.
2. Key points of the design of the vulcanization system of industrial rubber sheet for the production of tire reclaimed rubber
When using tire reclaimed rubber to reduce the production cost of ordinary industrial rubber sheets, oil-resistant rubber sheets, and acid and alkali resistant rubber sheets, sulfur-accelerator systems are mostly used, and accelerators such as DM, M, TMTD, etc. are used with sulfur; The amount of sulfur in the oil-resistant rubber sheet should not be too much to avoid excessive vulcanization and deterioration of performance.
3. Key points of the design of the reinforcing filling system of industrial rubber plate for the production of tire reclaimed rubber
When tire reclaimed rubber is combined with natural rubber, butadiene rubber or nitrile rubber to produce industrial rubber sheets, carbon black N330/N774 is often used as reinforcing fillers to significantly improve the wear resistance and tear resistance E4LYY522 performance of rubber sheets. The use of N774 reinforcement in oil-resistant rubber sheets, and the use of clay, calcium carbonate and calcium silicate filling is more beneficial to the oil resistance of vulcanized rubber. The use of barite powder in acid and alkali resistant rubber sheets can enhance chemical resistance, and fillers containing silica, phenol resin and talc should not be used.
4. Key points of design of industrial rubber plate softening system for tire reclaimed rubber production
When using tire reclaimed rubber to reduce the cost of raw materials for ordinary industrial rubber sheets, more engine oil and coumaron resin are used as softeners to improve the process performance of rubber and adjust the hardness of rubber compound. When acid and alkali resistant rubber sheets are mixed with tire reclaimed rubber, it is necessary to choose plasticizers that do not interact with acid and alkali; It can be combined with a small amount of paraffin wax to form a protective film on the surface of the rubber plate to improve the acid and alkali resistance of the rubber plate. When using nitrile rubber/tire reclaimed rubber together to prepare oil-resistant rubber sheets, softeners that are not extracted by oils, such as low-molecular weight polyethylene, ointment, etc., are used, and aromatic oils and esters are mostly used.
With the continuous progress of the production process of reclaimed rubber, the application of tire reclaimed rubber in industrial rubber sheets will become more and more extensive; Selecting the right reclaimed rubber products, reasonably designing the formula, and strictly controlling the production process can not only reduce the production cost, but also improve the comprehensive performance of the finished rubber sheet and improve the competitiveness of the product. In the future, Xiaobian will continue to share with you the key points of the production process of various rubber sheets for tire reclaimed rubber production.
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