Introduction to properties of unvulcanized rubber for rubber

Release time：2019-12-06 11:30:57

Properties of unvulcanized rubber: raw rubber contains additives, while unvulcanized rubber is called unvulcanized rubber, also known as rubber compound, which can be understood as semi-finished product, which is closely related to processing technology:

1. Fluidity: it's related to plasticity. The more plastics, the better fluidity, and the easier powder to eat. In the rolling and extrusion process is very smooth, in the curing process, the heating process can quickly fill the mold cavity, otherwise it is easy to lack of glue.

2. Frost spray: if the additive added to the formula exceeds its solubility in the rubber, a layer of frost will form on the surface of the rubber, called spray. Excessive addition of oil, paraffin, anti-aging agent, sulfur and accelerant will lead to injection and affect the appearance and interface binding.

3. Scorch: the vulcanization of rubber material in the process of processing or stopping production is called scorch. This phenomenon is easy to happen in high temperature season. The countermeasure is to add anti coking agent and strictly control the processing temperature. Shrinkage, expansion and deformation. The size shrinkage and expansion of the rubber outlet type will bring inconvenience to the molding. The main reason is that the plasticity of synthetic rubber is not enough or the utilization ratio is too high.