Shaped body of extruded acrylic glass

Details Shaped body of extruded acrylic glass Shaped body of extruded acrylic glass

B - Operations, Transporting

29

C

18/1041

B29C 67/00 (2006.01) B29C 51/00 (2006.01) E04D 13/03 (2006.01)

Patent

CA 1140718

ABSTRACT OF THE INVENTION A shaped acrylic glass body is provided which has a reshaped inner zone outside the plane of the border or edge region and which is characterized by excellent resistance to weather and to chemical corrosion. The shaped body is manufactured from an extruded plate of a polymer or copolymer containing at least 80% by weight of polymethylmethacrylate or a copolymer of methyl methacrylate. The extruded plate is subjected to biaxial stretching, by at least about 25% in each direction and, while the edges or border regions are gripped to maintain their dimensions, a force is applied to the interior portion of the plate while it is in a thermoelastic state to move the interior portion out of the plane of the surrounding edges.

341484

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