Manufacture of structural board panels
AssigneeBorfglace Limited
InventorCharles L. Wright
Life of this patent
Estimating the term…
Abstract
A method of forming structural board panels from short strands of bagasse or other cellulistic material. The material resinated, compressed and cured to give an open structural block. A mortar screed of portland cement and sand is then applied to penetrate interstices between the strands and is built up with rendering and facing layers of mortar. A reinforcement, such as an open mesh net of resinated nylon strands may be incorporated in the facing layer.
Claims18
A method of forming a structural board panel including providing a loose mat of overlapping strands of cellulistic material to which a resin adhesive has been applied, compressing and curing said mat to give an open structural block, applying a portland cement mix to penetrate into interstices between said strands, providing a rendering layer on said block, and introducing into a portion of said portland cement mix a reinforcement of resinated filamentary material which is applied as a layer spaced from said block of cellulistic material.
A method of forming a structural board panel including providing a loose mat of overlapping strands of cellulistic material to which a resin adhesive has been applied, compressing and curing said mat to give an open structured block having a density of between 160 and 400 kg/m.sup.3 and surface aperture of between 25% and 75%, applying a portland cement mix to one face of said block to penetrate interstices between said strands to a depth of between 5 and 25 mm, applying a portland cement mix rendering layer onto said face to a thickness of between 3 and 15 mm, laying an open mesh net of nylon strands coated with a water soluble, phenol free, resorcinol formaldehyde novalac resin cross-linked with formaldehyde or paraform and partially cured onto said rendering layer and then applying a portland cement mix facing layer over said open mesh net of nylon strands to a thickness of between 3 and 15 mm.
A structural board panel formed by a method which includes providing a loose mat of overlapping strands of cellulistic material to which a resin adhesive has been applied, compressing and curing said mat to give an open structured block, applying a portland cement mix to penetrate into interstices between said strands and to provide a rendering layer on said block wherein a reinforcement of resinated filamentary material is introduced into a portion of said portland cement mix and applied as a layer spaced from said block of cellulistic material.
A structural board panel as claimed in claim 17, wherein said resinated filamentary material is introduced into said portland cement mix at a stage in the curing process at which the exothermic reactions in said resin and said portland cement mix mutually assist.
A structural board panel formed by a method including depositing a loose mat of overlapping strands of cellulistic material to which a resin adhesive has been applied, compressing and curing said mat to give an open structured block having a density of between 160 and 400 kg/m.sup.3 and surface aperture of between 25% and 75%, applying a portland cement mix to one face of said block to penetrate interstices between the strands to a depth of between 5 and 25 mm, applying a portland cement mix rendering layer onto said face to a thickness of between 3 and 15 mm, laying an open mesh net of nylon strands coated with a water soluble, phenol free, resorcinol formaldehyde novalac resin cross-linked with formaldehyde or paraform and partially cured onto the rendering layer and then applying a portland cement mix facing layer over said open mesh net of nylon strands to a thickness of between 3 and 15 mm.
Dependencies are inferred from the claim text.