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Vermiculite, with layer construction and interlaminar water like mica, mainly has 2 types: brown and white. It has much more higher melting point-can be 1270-1370℃. Because of above particularity, vermiculite mine has much more value for exploitation. Also vermiculite has the particularity of fire-resistance, heat-insulation, sound-absorbability, non-toxic, huge linear expansion rate and tiny heat conduction rate etc. It begins expanding when heated over 200℃and becomes the worm-like shape .It can reach the maximum volume(15-25 times bigger)then it is heated rapidly to 800℃.This forms the material with low density(80-130kg/m3), excellent insulation properties and good absorption and iron exchange capacity. With the composite of bond and the surface macromolecules, vermiculite can be made into the light multifunctional vermiculite board. The raw vermiculite can be made into vermiculite board directly only after being broken, to be used for decoration generally. While the vermiculite board which is made from exfoliated vermiculite has much more value on light weight, sound-absorbing, and wide application such as the fire-resistance, heat-insulation.
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Items |
Partition Sheet |
Ceiling Sheet |
Compound Fire Resistent Sheet |
|
Size(mm) |
2400×1200×10-120 |
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|
|
2400×1200×10 |
1600×800×8 |
1900×850×43 |
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Bulk Density(kg/m3) |
700-800 |
600-700 |
450-600 |
|
Refractoriness ℃ |
1200 |
1200 |
1200 |
|
Absorb-Sound Rate |
35 |
36 |
60 |
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Tensile Strength kg/cm2 |
60 |
50 |
200 |
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Landscape Orientaion |
12 |
10 |
100 |
|
Bending Strenth kg/cm2 |
70 |
60 |
100 |
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Heat Conduction Rate |
0.028 |
0.025 |
0.02 |
|
Water Content % |
0.2 |
0.2 |
0.2 |
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Acid-Resistence(Under 10% H2SO4x25℃×100h) |
no flexible in surface |
no flexible in surface |
no flexible in surface |
|
Machining Performance |
saw,nail,plance,rivet,drill |
saw,nail,plane,rivet,drill |
saw,nail,plane,rivet,drill |
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