Process for manufacturing laminated bath tub or shower tray

Details Process for manufacturing laminated bath tub or shower tray Process for manufacturing laminated bath tub or shower tray

1989-07-12

1990-07-03

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156285, 264 464, 264 467, 264 468, 264259, 2643286, 4580, 4584, 4596, 4612, 4DIG9, B29C 4514

Patent

active

049388258

ABSTRACT:
A laminated article, for example a bath or shower-tray, is manufactured by providing a preformed shell, for example a thermoformed acrylic sheet, which shell is placed in a mould, together with, if required, a reinforcing board, for example of chipboard or plywood. The mould is then closed and materials are injected into the mould cavity which react to form a reinforcing layer on the shell. Preferably, the injected materials comprise a polyol reactant and an isocyanate reactant which form a layer of rigid polyurethane foam. A reinforcing agent, for example glass fibre, and a blowing agent may also be introduced into the mould cavity.

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patent: 3908862 (1975-09-01), Chandra
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patent: 4282285 (1981-08-01), Mohiuddin
patent: 4338270 (1982-07-01), Uffindel
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patent: 4350739 (1982-09-01), Mohiuddin
patent: 4444832 (1984-04-01), Mazzola
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patent: 4486368 (1984-12-01), Hancock
patent: 4562032 (1985-12-01), Gaudreau

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