Characteristics and application value of recycled rubber

Characteristics and application value of recycled rubber


Recycled rubber has a certain plasticity and reinforcement effect. It is easy to coagulate with raw rubber and compounding agent, and has good processing performance. It can replace some raw rubber and be mixed into the rubber material to make products, or it can be made into rubber products separately. This not only expands the source of rubber raw materials, saves raw rubber, reduces costs, but also improves the processing properties of rubber compound, reduces energy consumption, and has good technical and economic effects. Recycled rubber has the following advantages and characteristics.


1. The content of recycled rubber is about 50%, and it also contains a lot of valuable softeners, zinc oxide, carbon black, etc. Its breaking strength can reach more than 9MPa, and the price is cheap.

2. Recycled rubber has good plasticity and is easy to mix with raw rubber and compounding agent, saving labor, time and energy during mixing. At the same time, it can also reduce heat generation during mixing, hot refining, calendering and pressing, so as to avoid scorching due to excessive rubber temperature, which is more important for rubber with more carbon black content.

3. The mixture of recycled rubber has good fluidity, so the calendering and extrusion speed is fast, and the shrinkage and expansion during calendering and extrusion are small, and the apparent defects of semi-finished products are few.

4. The compound mixed with recycled rubber has low thermoplastic property, which is favorable for forming vulcanization. Not only that, but also the vulcanization speed is fast and the vulcanization reversion tendency is small.

5. The use of recycled rubber can improve the oil resistance and acid and alkali resistance of products, and can improve the natural aging resistance and heat and oxygen aging resistance of products.

Recycled rubber is widely used in various rubber products, such as footwear manufacturing, rubber sponge products; Regenerated rubber can be used appropriately for tire pad and bead rubber, tire cord ply rubber, sidewall rubber and tread underfloor rubber; Rubber sheets for automobiles and indoor rubber carpets; Rubber hose, various pressing products and molded products can be partially recycled rubber for rubber; The recycled rubber can also be directly made into hard rubber plates, battery shells, etc. Generally speaking, a certain proportion of recycled rubber can be used for rubber products that do not require high physical and mechanical properties such as mechanical strength. In general, it is rare to use recycled rubber completely, and most of them are used in combination. In addition to butyl rubber, recycled rubber has good compatibility with all kinds of general rubber.

Because the relative molecular weight of the recycled rubber is small, it has low strength, poor elasticity, no wear resistance, no tear resistance, and large bending cracks. Therefore, the proportion shall not be too large when used together, and special requirements shall be put forward for the rubber formula when designing products; Other components in the recycled rubber can be regarded as fillers and softeners, and the dosage of active agent, antioxidant, filler and softener shall be appropriately reduced in the formula design.

In addition, recycled rubber can also be used in building materials, such as cold adhesive coiled materials, waterproof coatings, sealant putty, etc; It can be used as the protective layer of underground pipes, cable protective layer, waterproof and anti-corrosion materials, and anti cracking materials for pavement.

Post time: Nov-08-2022