FOERFARANDE Foer FRAMSTAELLNING AV YTBAERANDE BYGGELEMENT FOERETRAEDESVIS BYGGBLOCK

摘要

1536329 Laminates; composite boards CASCO AB 20 Feb 1976 [21 Feb 1975] 6809/76 Headings B5N and B5L A stressed skin building element comprises a framework (Fig. 1) of wood-based fibre or composite board material and a skin material having a modulus of bending elasticity less than 100,000 kp./cm.SP2/SP attached to one or both sides of the framework by means of a setting adhesive with the ability to form a solid joint over a gap of at least 0À5 mm. and which has been allowed to cure with either no pressure in excess of that resulting from the dead weight of the components or under minimal pressure. The article may comprise more than one framework, exemplified materials for the frame and the skin being particle board, fibre board and plywood. The adhesive, which may comprise a filler may be an epoxy resin, a polyurethane or a condensate of an aldehyde, e.g. formaldehyde with urea, thiourea, melamine or a mono- or diphenol.