The production process of recycled rubber products

The production process of recycled rubber products includes plasticizing, mixing, molding, vulcanizing, and so on. It is roughly the same as the production process of natural rubber synthetic rubber products. When producing rubber products from recycled rubber, each process needs to be strictly controlled. This is important for the quality of rubber products.

1、Plasticizing

Plasticizing is the first step in the production of rubber products. Its purpose is to improve the plasticity of rubber material. Thus, it helps the mixing process of various matching additives evenly divided. And give the rubber better fluidity and permeability, easy to process molding. The recycled rubber has been fully plasticized in production and has good fluidity. Therefore, it is not necessary to refine the rubber products by themselves. Blending natural rubber and synthetic rubber to produce rubber products. You need to fully plasticize the two types of rubber before mixing them with recycled rubber.

2、Mixing

Mixing is putting the plasticized rubber and the compound into the refiner. Then use mechanical action to fully stir, the compound will be evenly dispersed in the rubber material. This gives recycled rubber different physical and chemical properties. This allows it to adapt to the performance requirements of different rubber products. Uneven mixing in the production of recycled rubber products can cause various problems. This can cause irreversible problems in the subsequent processes. After mixing, the rubber material is what we often call compounding rubber, a semi-finished product of rubber products.

3、Molding

Reclaimed rubber molding is performing reclaimed rubber blends into various shapes and sizes. Different molding methods are used for different recycled rubber products. It mainly includes calendering, extrusion, and molding. Calendering is generally used to produce sheet and plate products with simple structures. It is usually done on a calendar. Extrusion molding is generally used to produce products with complex shapes that need continuous production. It is generally performed in an extruder. Molding production usually produces products with complex shapes. It is generally molded in a die by heating.

4、Vulcanization

Vulcanization is the most important process in the production of recycled rubber products. It’s good or bad directly affects whether the product performance reaches the ideal effect. Product vulcanization is to add of a certain amount of sulfur and vulcanization accelerator to the semi-finished products of rubber material. It is put into the desulfurization tank, heated, and insulated. The linear molecules of the raw rubber are cross-linked to form a network structure by generating “sulfur bridges”. The plastic rubber is transformed into a highly elastic vulcanized rubber.

The different properties of recycled rubber products also require subsequent treatment measures. For example, recycled rubber products with high strength requirements require the addition of hard carbon black. For soft rubber products, it is better to add a large amount of softening agent, various antioxidants, etc.

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