Process for making a form from carbon fibers reinforced plastic by using a recycled carbon fibers reinforced plastic

摘要

The process comprises comminuting waste parts and/or scrap parts of a carbon fiber reinforced plastic, whose matrix contains a thermosetting plastic, adding a binder and then chopping the waste parts, mixing the ingredients to prepare a mixture that has a carbon fiber content of 40-70 wt.% and contains 80 wt.% of waste parts and/or scrap parts derived ingredients, where the binder comprises duroplastic precursors and/or thermoplastics, and molding the product to form an article. The waste parts or scrap parts are chopped to particles having a length of 50mu m to 20 mm. The process comprises comminuting waste parts and/or scrap parts of a carbon fiber reinforced plastic, whose matrix contains a thermosetting plastic, adding a binder and then chopping the waste parts, mixing the ingredients to prepare a mixture that has a carbon fiber content of 40-70 wt.% and contains 80 wt.% of waste parts and/or scrap parts derived ingredients, where the binder comprises duroplastic precursors and/or thermoplastics, and molding the product to form an article. The waste parts or scrap parts: are chopped to particles having a length of 50mu m to 20 mm, where dust particles contained in the comminuted product are filtered out during the chopping step so that the pulverized product contains less than 5 wt.% of dust particles having an average particle size of less than 100 mu m; and are composed of 40-60 vol.% of carbon fibers and balance amount of matrix. The method further comprises selecting the comminuted product with respect to the matrix and/or fiber content of the product, adding the chopped product with newly prepared carbon fibers and/or recycled carbon fibers, pyrolyzing the comminuted product at a temperature of 500-1000[deg] C or decomposing by solvolysis, and then optionally separating the decomposed matrix of the pyrolyzed or solvolyzed product from the carbon fibers. The matrix of the waste parts or scrap parts consists of thermosetting plastic or a mixture of duroplastic and thermo plastic. The duroplastic precursor contains a mixture comprising a monomer, a catalyst and optionally a crosslinker, a mixture comprising an oligomer, a catalyst and optionally a crosslinker, a mixture comprising a partially crosslinked polymer, a catalyst and optionally a crosslinking agent or a mixture comprising a monomer, an oligomer and/or a partially cross-linked polymer, a catalyst and optionally a crosslinker. The mixture prepared in the mixing step contains 50-90 wt.% of comminuted product, 10-30 wt.% of the added binder and 0-20 wt.% of the newly added carbon fibers. An independent claim is included for a molded article.