What is liquid injection molded silicone rubber? It is a kind of silicone rubber developed by addition molding liquid silicone rubber to adapt to injection molding process, referred to as Lim silicone rubber for short. Additive liquid silicone rubber is a kind of liquid silica gel. It is a kind of silicone material which can be crosslinked and vulcanized at room temperature or heating in the presence of platinum catalyst with polysiloxane containing vinyl as the basic polymer and polysiloxane containing Si-H bond as the crosslinking agent. In the process of crosslinking and vulcanization, it does not produce by-products, has very small shrinkage, can be deeply cured and corrode the materials in contact. It is the preferred material in the electronic and electrical industry.

What are the advantages of LIM silicone rubber compared with the forming and vulcanization process of mixed silicone rubber? The details are as follows:

1. Roller mixing is not required before forming and vulcanization. There is no foreign matter mixed in the sealing system, and rubber filtering is not required;

2. Short forming and vulcanization cycle (10 ~ 40s), automatic operation and labor saving;

3. No overflow and no runner forming can be achieved to reduce waste and trimming treatment;

4. There are no by-products in the vulcanization process. Generally, there is no need for secondary vulcanization and no environmental pollution;

5. It can be combined with plastics (PA, PC, PBC, etc.) or metal inserts for forming and two-color forming.

The physical and mechanical properties of LIM silicone rubber after vulcanization can not only reach the same level as mixed silicone rubber, but also higher than mixed silicone rubber in some properties. Some products processed with multiple pieces of mixed silicone rubber have turned to Lim silicone rubber, which is widely used in the processing of silicone products such as automobile parts, cable parts, keys, insulator umbrella skirts, copier rubber rollers, household appliance parts, various gaskets, pacifier bottles and so on.