Posts

news

HCR

HCR quality or high temperature vulcanized silicone rubber is used in the compression moulding press. Special silicone rubber materials are chosen based on their intended use, weather they need to be fire, oil or heat resistant. Food and medical qualities have FDA and BFR approvals.

HCR silicone has been widely used to replace petrochemical products in all industries including aerospace, munitions industry, automobile, fine chemicals, construction, electric and electronics, food processing, mechanical engineering, medical and pharmaceutical, cosmetics, home appliances, paper film, solar batteries, and semi conductor. Recently, the scope of silicone application has been expanding at a greater speed.

Characteristics of HCR:

Durable: Silicone rubber is a material of choice in industry when retention of initial shape and mechanical strength are desired under heavy thermal stress or sub-zero temperatures. Organic rubber has a carbon-to-carbon backbone which can leave it susceptible to ozone, UV, heat and other ageing factors that silicone rubber can withstand well. This makes silicone rubber one of the elastomers of choice in many extreme environments.

Chemical resistance: HCRsilicone is highly inert and does not react with most chemicals. Due to its inertness, it is used in many medical applications including medical implants. It is biocompatible, hypoallergenic and non-allergenic, which makes it suitable for baby care products, and food contact in general.

Temperature resistance: HCR silicone offers good resistance to extreme temperatures, being able to operate normally from −100 to 300 °C.

Mechanical properties: properties such as elongation, creep, cyclic flexing, tear strength, compression set, dielectric strength (at high voltage), thermal conductivity, fire resistance and in some cases tensile strength can be—at extreme temperatures—far superior to organic rubbers in general, although a few of these properties are still lower than for some specialty materials.

Electrical properties: HCR silicone has excellent insulating properties.

LSR

Liquid Silicone Rubber with  low compression set, fast cure cycles, great stability and ability to resist extreme temperatures of heat and cold can makes itself being ideally suitable for the high standard quality production application. Unlike most thermoplastic elastomers, LSR remains flexible and elastic down to -60 centigrade and retains its properties up to 200 centigrade. In addition to these properties, the wide range of hardness and colors, silicone elastomers have become the material of choice for an ever increasing amount of applications.

Typical applications for liquid silicone rubber are products that require high precision such as seals, sealing membranes, electric connectors, multi-pin connectors, infant products where smooth surfaces are desired, such as baby nipples, medical applications as well as kitchen goods such as baking pans, spatulas, etc.

Characteristics of LSR:

Durable: LSR parts can withstand extreme temperatures, which makes them an ideal choice for components under the hood of cars and in close proximity to engines. Parts fabricated via liquid silicone rubber injection molding are fire retardant and will not melt.

Chemical resistance: Liquid silicone rubber resists water, oxidation and some chemical solutions such as acids and alkali.

Temperature resistance: Compared to other elastomers, silicone can withstand a wide range of high/low temperature extremes.

Mechanical properties: LSR has good elongation, high tear and tensile strength, excellent flexibility and a hardness range of 5 to 80 Shore A.

Electrical properties: LSR has excellent insulating properties, which offer an appealing option for a host of electrical applications. Compared to conventional insulating material, silicone can perform in far higher and lower temperatures.

The Challenge

An increasing number of industries, such as domestic appliance manufacturing, the nuclear industry and electronic OEMs require high-performance silicone foam solutions for critical applications. Silicone foam is a soft and flexible elastomeric compound that can be customized to meet specific requirements. It provides the performance benefits of the standard silicone technology, but with added flexibility and suppleness.​