Xiamen Better Silicone Rubber Co.,Ltd
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Rubber grommet production

Rubber categories:
(1) General Rubber: NR/BR/SBR/EPDM  
(2) Special Rubber: SR/FPM/CIIR/HNBR/CSM
Different rubber materials possess differents properties. Choose a correct material is important when you decide to produce a product. We will discuss some differences between these materials so that you can choose the right one.

NBR is a unsaturated rubber copolymer with polar unsaturated carbon chains, which is copolymerized by propenenitrile and butadiene, according to propenenitrile content from low to high, the higher the resistance to oils but the lower the resistance to cold.
Oil resistance is the greatest advantage of NBR elastomer so it has excellent resistance to petroleum base oils and non-polar solvents but poor resistance to polar oils and polar solvents.


Neoprene rubber features Good Physical Properties, Oil resistance, heat & flame resistance, sunlight resistance, ozone resistance, acid and alkali resistance and chemical resistance.
The cold tolerance and storage stability are not very well.
Tensile strength, elongation, reversible crystalline and adhesion are good.
Aging resistance, heat & oil resistance and chemical resistance are excellent.

O Ring
(Main Materials)
Working Temperature Properties & Applications
NBR O Ring
Good resistance to mineral oil and wearing;
Widely used in oil seals;
Can’t be used in polar solvents(e.g. ketones & esters solvents)
SI O Ring
Good resistance to heat & cold;
Inferior to other rubbers in resistance to weather, alkaline and water. 
FKM O Ring
Excellent heat resistance 
Good oil & chemicals resistance
Excellent resistance to polar solvents and weather;
Poor oil resistance
Good resistance to heat, cold, chemicals and weather;
One of main materials used in Low coefficient of friction oil seals;
Poor elasticity


Office Address: Room No. 513-515, 5F, Culture Creative Park,No.10 Huli Avenue, Huli District, Xiamen, China
  Factory Address: 165th, Tong'An Park, Industrial Zone, Tong'An District, Xiamen City, China
 Post Code: 361000
Tel: 86 592-5616001
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