O-Ring Materials - SI, VMQ, PVMQ，MQ，PMQ

Silicone rubber is a compound containing silicone. To make this type of synthetic elastomer, side-chain organic groups such as methyl, phenyl and vinyl are attached to silicon atoms. Different additions of side chains can produce significant changes in performance.

Material properties:
● Heat resistance, ozone resistance and corona resistance, excellent dielectric stability.
● Among all elastomers, silicone has the best elasticity at low temperatures. But it also has some disadvantages, such as low tensile strength, poor tear resistance and abrasion resistance.
● Chemically extremely inactive.

Applicable industries:
● Consumer products (keyboards), food contact (baking, kitchen utensils, beverages), infant care (baby bottle spouts), automobiles, cable accessories, general rubber manufacturing, etc.

Best● Better○ Good△ BadX

Rubber type (ASTM Abbreviation )			Silicone Rubber SI, VMQ, PVMQ，MQ，PMQ
Chemical structure			Silicone main chain from silicon (-si-o-si) combined
Main feature			Heat-resistant, cold, non-toxic, with good electrical insulation properties, not resistant to oil, ozone and solvents.
Pure rubber properties		proportion Muni viscosity ML1+ (100℃)	0.95 ∼ 0.98 Liquid
Physical properties of synthetic rubber		Possible JIS hardness range General temperature range(℃) Special temperature range(℃) Tensile strength (kg/cm2) Elongation (%) Anti-elastic Cracking Wear resistance Bending resistance	30 ∼ 80 -40 ∼ 200 -70 ∼ 300 40 ∼ 100 500 ∼ 50 ● X ~ △ X ~ △ X ~ ○
Various properties of synthetic rubber	lubricating oil	Engine oil Gear Oil Motor oil Shaft lubricant Refrigeration oil Butter Lithium oil Oyster sauce	● △ ○ △ △ △ ● X
	Working oil	Pot shaft oil Oil + Water emulsion system Water + Glycol Phosphate ester Si Brake Fluid Gear oil	○ △ △ ○ X ○ △
	Fuel oil	Light oil、kerosene Heavy oil Gasoline	X X X
	Water	Water、Warm water Water vapor、Hot water Antifreeze water Water cutting oil	○ △ △ △
	Drug	Hydrochloric acid 20% Sulfuric acid 30% Nitric acid 10% Caustic soda 30% Benzene Trichloroethylene Alcohol Vinyl glycerol Liquid fat Alcohol Ether Ketone (MEK) Acetic acid、Ethyl ester	△ ○ △ X X X ○ ● X ~ △ ● X ~ △ ○ △
	Gas	LPG Urban gas Ozone Freon 12 Freon 22	X △ ● X X
	Other	Food Sanitation Law Vacuum、Atmosphere 10mm kg 10-4 ~ 10-9	● ●
The main purpose			Use electrical, electronic, medical, food and other seals.