LSR - kcc
Electronic/Home Appliances Industry


LSR (Liquid Silicone Rubber)

Technically, LSR (Liquid Silicone Rubber) refers to silicone which exists in a liquid state before curing to become a rubber. However, LSR generally refers to rubber that is cured at high temperatures.
Because it has the basic characteristics of silicone rubber and is in liquid state, unlike HTV, it can be used for automated LIM (Liquid Injection Molding) which automates the process of reforming, mixing and molding. In addition, various coating methods can be applied to coat industrial materials.
These advantages have made it possible to provide a wide range of products, such as baby products (i.e. pacifiers and toys), diving masks, kitchen container covers, automobile accessories such as connector seals and O-rings, electric and electronic parts such as OA rollers, keypads and airbag coatings are used in everyday life and throughout the industries.

HVI (High Voltage Insulator)

Silicone is a non-conductive material due to its chemical properties. As a result, silicone has excellent electrical insulation property and hydrophobicity. LSR has excellent properties such as weathering, tracking and arc resistance, and is light and easy to handle compared to porcelain. The electrical properties of LSR include unchanging even in environments of strong wind, high temperature heat, rain, snow and high humidity conditions. Currently, LSR is widely used in electric insulators, arresters and hollow cores.

OA Roller

Many rollers for office automation equipment such as printers and photocopiers are now being manufactured using silicone rubber as LSR is a highly heat-resistant product that can withstand temperatures of 200℃ over an extended period of time and has a low compression shrinkage to ensure long-term printing reliability. OA roller is manufactured by wrapping LSR on metal core rods such as aluminum or SUS. In this case, a separate primer is required as attachment of rod and LSR is important.


As a downside, it is difficult to bond LSR to plastic or nonferrous substrates such as TPU or PE and hence use of primer is essential.
Primer is used by spraying or coating on the surface of substrate and curing at appropriate temperature.