When our sales staff introduces reclaimed rubber products to customers, they often say that our reclaimed rubber has been parked and can be directly used for the production of rubber products. Xiao Bian today took EPDM reclaimed rubber as an example to tell everyone why recycled rubber needs to be parked before use. What is the important role?
In fact, not only EPDM reclaimed rubber, but also all recycled rubber products such as latex reclaimed rubber, tire reclaimed rubber, nitrile reclaimed rubber, butyl reclaimed rubber, etc., need to be parked for a period of time before they are used. This is because The reclaimed rubber products from the production line have not fully recovered the degree of plasticity. If they are directly used for the production of recycled rubber products, sticking rollers, dirty molds, unsuitable rubber compounds, and excessive sulfur on the surface of the products may occur, resulting in tensile strength and tearing. The growth rate will be reduced, the overall performance of the rubber products produced will be poor, and the rubber products after the completion of the production may also undergo changes in indicators, which are due to the consequences of too short parking time.
However, the parking time of EPDM reclaimed rubber is not as long as possible. Once the parking time is too long, it will lead to a series of problems such as lower plasticity of EPDM reclaimed rubber, increased hardness, increased Mooney viscosity, and decreased strength. The hardness of rubber products produced using such reclaimed rubber increases, the tensile strength increases, and the elongation at break decreases so as to affect the performance of the products.
The reason why the length of parking is changed is that the index changes, in addition to plasticity is not completely restored, the chemical additives added in the production of EPDM reclaimed rubber may not be completely dispersed. During the parking process, chemical additives will continue to be linked with rubber molecules. The reaction until completely dispersed, this time the EPDM reclaimed rubber is more stable indicators, the rubber products produced are not easy to change indicators.
Therefore, the "freshly baked" EPDM reclaimed rubber needs to be parked for a period of time. After research shows that: the parking time is 7-15 days, the best effect of reclaimed rubber, this time the EPDM reclaimed rubber has completely restored plasticity, Can be used with confidence.
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