Method for recycling products containing polyethylene fibres with an ultra-high molecular weight

摘要

The method for recycling products containing polyethylene fibers with an ultra-high molecular weight, retaining the advantageous characteristics of the fibers, consists in the process in which products and/or waste containing 70-75% of UHMW-PE polyethylene fibers, with a molecular weight from 10⁶ to 9x10⁶ g/mol and melting point above 145°C, thermoplastic binder in an amount of 10-20% and low or average density polyethylene covering sheeting, in an amount of 8-15%, are comminuted by cutting into fragments containing UHMW-PE fibers 100 µm to 10 mm long, then adding low or average density granular or powdered polyethylene to the received batch of the cut mass, heating to a temperature lower than the melting point of UHMW-PE fibers by minimum 15°C and, maintaining the prescribed temperature, mixing until homogenization of the mass and cooling, to undergo further treatment at a temperature lower than the melting point of UHMW-PE fibers.;In the second version, waste is treated with binder solvent and flushed with the same solvent, evaporating the residual solvent, then adding low or average density granular or powdered polyethylene to the received batch of the cut mass. The follow-up to the process proceeds as in the first variant, using the cut mass not deprived of the binder.;Products made up of the received composite are characterized by great functional, mechanical and esthetic advantages.