As the most widely used reclaimed rubber product in the reclaimed rubber industry, tire reclaimed rubber can be used in the production of hard rubber and reduce the cost of raw materials. Hard rubber is one of vulcanized rubber. The most important use is to prepare automobile battery casing, which is made of high-sulfur vulcanization of unsaturated rubber. Xiaobian first shared with you a tire reclaimed rubber preparation engine battery casing formula.
Tire reclaimed rubber, 38.5 parts; hard rubber powder, 11.5; clay, 33 parts; heavy calcined magnesia, 3 parts; sulfur, 6.5 parts; coal tar, 2.5 parts; asphalt oil, 5.0 parts; total: 100 parts.
As the typical hard rubber, the engine battery casing has high insulation requirements. Generally, the high-quality tire reclaimed rubber produced by the water-oil method is used. When the rubber product manufacturer prepares the battery casing from the reclaimed rubber, it can choose whether it is natural or not according to actual needs. Glue or styrene butadiene rubber.
Sulfur is the most traditional vulcanizing agent. The higher the amount of rubber products, the faster the vulcanization rate and the higher the degree of vulcanization. However, the sulfur itself has limited solubility in rubber. The excessive amount of sulfur and the excess will be from the rubber compound. In the middle of the surface, "sulphur spray" appears; in the actual use process, the amount of sulfur in the soft rubber does not exceed 3%, the amount of sulfur in the semi-hard rubber is about 20%, and the amount of sulfur in the hard rubber production can be as high as More than 40%; therefore, the amount of sulfur used in the above formula is higher than usual.
Heavy calcined magnesia is not common in the production of rubber products. It is a product of magnesium oxide. It is used as an inorganic accelerator in the above formula to prevent scorch during the processing of hard rubber. Calcium oxide is quicklime. It is a hygroscopic inorganic compounding agent. Adding proper amount of calcium oxide in the engine battery casing can protect the casing from acid corrosion in the battery.
Clay is the largest silicate filler in the rubber products industry. Light-colored reinforcing filler can improve the processing technology of rubber compound. Adding proper amount of clay when selecting tire reclaimed rubber to prepare hard rubber can ensure smooth appearance and viscosity. High, high stiffness, small shrinkage, easy to dissipate heat, the exothermic reaction can be minimized during use, avoiding air bubbles on the surface of the shell during rapid vulcanization at high temperatures.
Any rubber product formulation can not be separated from softeners. The use of tire reclaimed rubber to produce battery casings generally uses asphalt oil and coal tar as softeners, both of which are low-cost softeners, which can be used in the production of hard rubber. The softener is used to improve the plasticity of the rubber, soften the reclaimed rubber, improve the uniform dispersion of other compounding agents in the rubber compound, and also reduce the lubricant cost as a lubricant.
Select the battery shell wall is thin, in order to ensure the smooth and bright surface of the product when selecting the tire reclaimed rubber, it is best to choose high-strength, high-wearing, high-fineness tire top reclaimed rubber, if necessary, use appropriate amount of natural rubber, styrene-butadiene Glue, improve the hardness of hard rubber, and ensure the performance and service life of the battery casing.