Insulating plate and process for the preparation thereof
AssigneeOsterreichische Hiag-Werke Aktiengesellschaft
InventorHerbert Mayerhoffer
Life of this patent
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Abstract
A thermal and acoustic insulating plate comprising an aminoplastic resin and a fiber reinforcement embedded therein in the form of a non-woven body of glass fibers extending uniformly throughout the entire volume of the plate. In preparing the plate a non-woven body of glass fibers is impregnated with aminoplastic resin, whereafter the resulting structure is expanded and cured in a mould by supplying heat energy thereto.
Claims10
A process for the preparation of an insulating plate comprising impregnating a loose, non-woven matlike body of mineral fibers lying in all directions with an aqueous solution of a melamine-formaldehyde-resin or a melamine-rich aminoplastic synthetic resin to which a curing agent has been added and which has been adjusted to hot-curing in excess over the predetermined weight value of resin impregnation, reducing the amount of solution remaining in the non-woven matlike body to said predetermined weight value by removing the excess, placing the impregnated non-woven body in a mould determining the shape of the plate, and subjecting said non-woven body to the action of an electric microwave field to supply energy for the expansion and curing of the resin and thereafter said non-woven body is taken out from the mould and subjected to a subsequent heat treatment with hot air.
Dependencies are inferred from the claim text.