US3635784A
Expired / Lapsed
US
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Solid composite boards having a compact core of adhesive binder and 85{14 98 percent by volume of porous, nonabsorbing granulates selected from the group consisting of cork bark, and vermiculite
Abstract A solid board, such as a door plate, comprising a solid core having a first and second core face and a frame surrounding said core adhesively connected thereto and having a first and second frame face flush with said first and second core face respectively. The first and second surface sheets are uniformly adhesively secured to the first core and frame face and to the second core and frame face respectively; the core consists of a compact core mass-produced from porous nonabsorbing granulates, which have been brought mutually to adhere to each other by adhesive means. There are reinforcement means embedded in the core mass which consist of a number of strips made of fibrous material each having a width equal to the frame thickness and extending between the two surface sheets.
A solid board as defined in claim 1, said core mass being based on cork.
Claim 2
Dependent Claim
30 words
A solid board as defined in claim 1, said core mass being based on granulated bark containing resin like compounds at least partly serving as adhesive for interconnecting said granules.
Claim 3
Dependent Claim
15 words
A solid board as defined in claim 3, said bark being bark of coniferous trees.
Claim 4
Dependent Claim
16 words
A solid board as defined in claim 1, said mass being based on granules of vermiculite.
Claim 5
Dependent Claim
39 words
A solid board as defined in claim 5, said core mass further having an addition of from 0.5 to 2 percent by volume, of a powdered or granulated expansive material expanding when heated to a temperature above 100* C.
Claim 6
Dependent Claim
31 words
A solid board as defined in claim 1, said core mass further having an addition of a powdered or granulated expansive material expanding when heated to a temperature above 100* C.
Claim 7
Dependent Claim
18 words
A solid board as defined in claim 7, said expansive material being a mixture of ammoniumdiphosphate and dextrin.
Claim 8
Dependent Claim
22 words
A solid board as defined in claim 8, said expansive material comprising approximately of equal parts, by weight, of ammoniumdiphosphate and dextrin.
Claim 9
Dependent Claim
16 words
A solid board as defined in claim 7, said expansive material comprising granulated vermiculite raw material.