Fire door core

Details Fire door core Fire door core

E - Fixed Constructions

06

B

E06B 5/16 (2006.01)

Patent

CA 2174199

A core for fire doors comprises hydrated gypsum occupying about 40% to 46% of the core volume and bubbles occupying almost all the core volume which is not gypsum. The larger bubbles preferably comprise about 31% to 38% by volume of bubbles of between 1 and 4 mm and about 17% to 25% of smaller bubbles between .01 mm and .25 mm. The larger bubbles are formed using styrene spheroids.

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