fireproof door core
calcium silicate
insulation board
High Temperature Calcium Silicate Core for Fireproof Door
High temperature Calcium Silicate Core is a kind of inorganic material with stable physical and chemical performance of high resistant temperature, low thermal Conductivity good effect of insulation for fire and sound-proof, low bulk density, high specific strength and never deformed. The Core can be pieced together arbitrarily and no asbestos absolute.
The cores will not sent out any irritant smoke and gas when burned in high temperature. It is a pure green building material. So it is suitable for fireproof and sound insulation door.
This kind of material had already widely used as cores of fireproof. And sound insulation doors in various field. The limited fire resistance is up to 90 min, even more than 120min. This products have exported to USA, Canada, South Korea, Singapore, South Africa, Australia and Japan, etc. And have already earned more honors from the customers.

Physical Performance
Item Unit Core for steel door Core for wooden door
Bulk Density Kg/m3 260-320 270-350
Flexural Strength Mpa ≥0.6 ≥0.7
Thermal Cond. W/m.k ≤0.07 ≤0.07
Temp. Limit ℃ 1000 1000
Linear shrinkage
(1000℃*3h) % ≤1.5 ≤1.5
Soundproof Coefficient db ≥30




Size and Dimensional Tolerance
Length * Width(mm) 1040*860,100*500,1050*850
Thickness(mm) 30-120
Tolerance(mm) Length ,width±2, Thickness ±0.25



Note: We can make some special specification’s core according to the requirement of customer.