SFEP is committed to providing a package of solutions for the Rubber Industry:
1、Silicone Rubbers Field：
WACKER HDK® fumed silica. The reinforcement of HTV silicone rubber is influenced by its median particle size, specific surface area and its structure. Normally, the smaller the median particle size is, the higher the specific surface area is; and the better the structure is, the better the effect of physical reinforcement is.
Hydrophilic amorphous silica types:
Types
V15
V15D
N20
N20D
N20ST
T30
T30P
T40
Specific surface area（BET） m2/g
150±20
150±20
200±30
200±30
200±30
300±30
300±30
400±30
PH value
3.8-4.3
3.8-4.3
3.8-4.3
3.8-4.3
3.8-4.3
3.8-4.3
3.8-4.3
3.6-4.3
Tamped density g/l
Appx 50
Appx 50
Appx 40
Appx 40
Appx 40
Appx 40
Appx 40
Appx 40
Loss on drying wt%
〈 1.0
〈 1.0
〈 1.5
〈 1.5
〈 1.5
〈 1.5
〈 1.5
〈 1.5
Sieve residue wt%
〈 0.03
〈 0.03
〈 0.04
〈 0.04
〈 0.04
〈 0.04
〈 0.04
〈 0.04
2、Recommended new product: U.S. SILICA MIN-U-SIL and calcined kaolin clay :
Good additives, resulting in good reinforcing effect. Besides, they act as fillers in the rubber products and they can improve the manufacturability.
3、The application of imported PTFE fine powder in rubber industry:
PTFE fine powder can be added into Fluorine rubber, polyurethane rubber, NBR, SBR, thermoplastic polyurethane and soft PVC, etc. It can drastically reduce the coefficient of friction surface and wearing and prolong the time of heating up. Moreover, it prevents sealing washers and pads from sticking and sliding. Meanwhile, it improves the demould properties when it’s done.
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