Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Of inorganic materials
Patent
1992-09-04
1994-07-19
Aftergut, Karen
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Of inorganic materials
264 69, 264 70, 264118, 264122, 264145, 264160, 264163, B28B 108, B28B 1114
Patent
active
053306910
ABSTRACT:
Glass fibre reinforced plasterboard including a gypsum matrix of high density with embedded staple glass fibres therewith forming a pressure resistant solid body frame in which are embedded a plurality of very small hollow spaces of 5-350 microns in diameter, produced by a fine-pore foam or at least partially by small particles of non-porous and non-water absorbing fillers. During the manufacturing process of such glass fibre reinforced gypsum board, the gypsum and the fibre pieces are given only so much water that the water/gypsum ratio does not exceed 0.6, whereafter a foam and/or pourable or free-flowing fillers are added in such quantities that the apparent density of the entire board is at least 20% smaller than the density of the bonding means component of the matrix, and the paste is subjected while being formed to a vibration.
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Aftergut Karen
N.V. Recdo S.A.
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