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AM-SUPRA
It is a specially process bentonite having high swelling, high gelling index and maximum active clay part. It is suitable for high pressure foundries and for specific casting where surface finish is the important factor.
Typical Physical Properties
| Form |
Finally Divided Powder |
| Free-swelling |
32-35ml |
| PH |
9.5-10.5 |
| Moisture |
12% Max. |
| Gelling Time |
Instant |
| Gelling Index |
85-90% |
| M.B. Value |
400-450 |
| Fineness |
90% throught 200mesh B.S. |
It has excellent W.T.S. and G.C.S. and very high bonding capacity.
Instant gelling time and excellent suspension property (85-90%) reduces the time of mold drying.
Retains 50% of its properties even after the heating to 500°C.
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Characteristic
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Test Results
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| Wet compression durability (Strength durability) |
2050-2080 |
| Wet Shearing Strength (Tensile durability) |
420-440 |
| Gas transmission rate |
198 |
| Methylene Blue test |
45-47ml. |
AM-INSTA
This grad hsa widely excepted by all normal foundries all over and successfully captured sizable market.
Typical Physical Properties
| Form |
Finally Divided Powder |
| Free-swelling |
30-32ml |
| PH |
9.0-10.0 |
| Moisture |
12% Max. |
| Gelling Time |
Instant |
| Gelling Index |
75-80% |
| M.B. Value |
390-400 |
| Fineness |
85% throught 200 B.S. sieve |
AM-MAXI
This is a most economic grade of bentonite and is second largest selling part out of three grades formulated.
Typical Physical Properties
| Form |
Finally Divided Powder |
| Free-swelling |
28-30ml |
| PH |
9.0-9.5 |
| Moisture |
12% Max. |
| Gelling Time |
- |
| Gelling Index |
60-75% |
| M.B. Value |
350-390 |
| Fineness |
85% throught 200 B.S. sieve |
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