What Is LSR Material?

LSR is an inorganic polymer formed by silicon (Si), oxygen (O), carbon (C) and hydrogen (H). The main chemical chain called the backbone, is formed by silicon and oxygen, called siloxane. To achieve its final characteristics, catalysts are added during the curing process creating a chemical bond between the backbones called crosslinks. Platinum and peroxide are two chemicals used in this curing process, LSR is a platinum-cured silicone rubber. Platinum-cured silicone rubbers offer benefits over peroxide-cured silicone rubbers including improved tensile strength and tear strength, clarity and consistency, and do not leave behind peroxide residue.

LSR’s versatile properties come from its siloxane bond. The chain offers an inorganic backbone that does not interact with biological materials and can be combined with organic chemical groups. The siloxane bond also helps deliver better mechanical performance and strength.

LSR for Multiple Applications 

The inorganic nature of LSR makes it ideal for medical and skin-contact applications, while its ability to combine with other chemical groups allows it to achieve robust performance. For instance, its rebound resilience known as compression set, is the ability to transfer energy after a force is applied and return to its original shape after compression. LSR outperforms many other elastomers and is used in pushbuttons or keyboard applications, and is preferred for pumping applications, especially if in contact with bodily fluids or chemical substances.

Injection molding liquid silicone rubber is a specialized process however because of its viscous nature, it processes easily and is perfectly suited for high-volume production, consistent part quality, and improved productivity. Because of its properties and processability, liquid silicone rubber has become the ideal material for intricate part design features, and demanding, critical use applications.