Patent ID: 9636889
Date: 2017-05-02
CPC Classifications: B32B,E04F

Claim:
1. A composite formed board, made of rubber aggregate combined with polyurethane resin in a form of homogeneous rubber-polyurethane composite made into a specified shape with a specified height, said rubber-polyurethane blend is bonded with a composite made of plastic and organic material with a fibrous structure to form a joint, said joint is a permanent bond in an area of the joint and an impermanent bond in a contact area outside the joint, wherein the joint has a V-shape or a Y-shape or an inverted Δ-shape, constituting a material protrusion of the organic-plastic composite into a volume of the rubber-polyurethane composite, wherein a base of the joint is located in the plane of contact of both composites in the contact area outside the joint, and wherein said organic material with a fibrous structure is selected from the group consisting of wood-base material, wood fibre material, bamboo fibre material and straw fibre material, the rubber-polyurethane composite constitutes a bottom layer of said composite formed board, wherein the composite made of plastic and organic material with a fibrous structure is a foamed mix, with a density lower by at least 10% than the density of a solid organic-plastic composite made of the same components, said foamed mix layer is bonded permanently and inseparably with a solid plastic layer on the side opposite to the homogeneous rubber-polyurethane composite, the solid plastic layer constituting a top layer of said composite formed board, wherein a thickness of the solid plastic layer is smaller than that of the organic-plastic layer and the rubber-polyurethane layer.