Patent ID: 7241484

Claim:
A method for manufacturing an, elongated, reinforced compound construction element in the shape of a tubular or hollow profile, an I-profile, H-profile or another profile comprising a body and legs or arms that are protruding therefrom having an E-modulus of 6000 Mpa or more, having a wood-like appearance in an extrusion process, comprising pressing a composite material through an extrusion die, a) which composite material comprises a matrix of thermoplastic synthetic material selected from the group consisting of polyolefin, PVC and polycarbonate and a mass of dried cellulose particles containing approximately less than 1% by weight of moisture and composed of a portion of small fibers in the size of 0.2 to 2 mm and a fraction of large elongated particles of a size 2 to 6 mm, in an amount of at least 50% by weight, and b) one or more continuous longitudinal elongated reinforcement elements, which additional elements are brought into tight engagement with the composite material for providing tensile reinforcement or compressive reinforcement to form an initial compound element, thereafter shaping the initial compound element in a die to form said, elongated, reinforced compound construction element.