EPDM reclaimed rubber is resistant to high and low temperature, anti-aging and ozone resistance. It can be used for the production of outdoor rubber products and can maintain its physical properties for a long time, and significantly reduce the cost of raw materials. However, when using EPDM reclaimed rubber to produce rubber products, reclaimed rubber selection is particularly important. For example, Xiao Bian often listens to our sales staff and says: When customers choose EPDM reclaimed rubber, they often raise the question of ‘your EPDM reclaimed rubber migration’. Indeed, in the production of EPDM reclaimed rubber products, whether or not reclaimed rubber migrates directly affects the quality of EPDM reclaimed rubber products.
First of all, Xiao Bian first looked at the color change migration of reclaimed rubber and the raw materials that caused the migration of EPDM reclaimed rubber. The retransferable rubber undergoes a discoloration migration. It mainly means that the surface of reclaimed rubber and its products is blue, white, and pan. There are many reasons for the phenomenon of yellow migration, such as the content of recycled rubber black, the type of rubber oil, and the formula design of reclaimed rubber.
As the most commonly used reinforcing filler in the rubber industry, carbon black can significantly improve the tensile strength, elongation at break, and hardness of rubber compounds. It is also essential in the production of EPDM recycled rubber and its products. However, the excessive amount of carbon black used in the EPDM reclaimed rubber and its product formulations exceeds the solubility in the rubber material, which will cause yellowing and bluing on the surface of reclaimed rubber or products.
Rubber oil is a softening plasticizer produced by EPDM reclaimed rubber and EPDM reclaimed rubber products. It can improve the elasticity, flexibility, low temperature, processability and kneading properties of the rubber, but like carbon black, if reclaimed rubber After the use of medium rubber oil exceeds its solubility in EPDM reclaimed rubber, undissolved rubber oil will precipitate on the surface, resulting in yellowing of reclaimed rubber and the surface of the product; in addition, the migration of inferior rubber oil itself will also result in EPDM reclaimed rubber migration.
Rosin can increase the elasticity of reclaimed rubber compound, improve adhesion, and promote the dispersion of compounding agents. However, 90% of the components in rosin are resin acids, and the acid value is too large. Excessive amounts of rosin cause the acid and alkali in the reclaimed rubber to lose its balance. More results in the migration of EPDM reclaimed rubber (the excessive acidity of the EPDM reclaimed rubber will cause blue spray, alkaline spray white), so it is necessary to control the amount of use.
In addition, the temperature difference between EPDM rubber in summer and summer is too large, the acidity and alkalinity of the reclaimed rubber will also change, which will affect the color transfer of reclaimed rubber; the vulcanization system and anti-aging system in the EPDM reclaimed rubber and product formulation Inappropriate use of a powdery complexing agent in a strong system can also cause various migration conditions. The reasons that affect the migration of EPDM reclaimed rubber are not limited to this, and there are many others waiting for you to discover and solve together.
The discoloration migration of EPDM reclaimed rubber during use will affect the appearance of reclaimed rubber products, and the use of reproducible EPDM reclaimed rubber will result in reduced performance and shortened lifespan of reclaimed rubber. Significance. If there is a migration of rubber oil used in the production of EPDM reclaimed rubber by a reclaimed rubber plant, migration occurs when EPDM rubber products are produced.
The selection of high-quality EPDM reclaimed rubber is the basis for ensuring that reclaimed rubber products do not undergo discoloration and migration. At the same time, in order to ensure the quality of EPDM products, it is also necessary to rationally design reclaimed rubber product formulations, whether vulcanization system, reinforcing system, filling system, or anti-aging. The design of the system, or the setting of curing time and vulcanization temperature, needs to be completed by professional engineers, and skilled operators are selected to operate and strictly ensure the normal and correct production process of EPDM recycled rubber products.
The EPDM reclaimed rubber produced by Hongyun Reclaimed Rubber Factory selects high-quality raw materials. After many formulation adjustments, the use of high-quality rubber oil, which will not migrate, is completed under the strict supervision of professional technicians using advanced production technology. The product will not appear to be migrating. It is an ideal raw material to replace part of EPDM rubber to reduce the cost of rubber products.
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