the invention relates to a method and apparatus for using recycled plastic material , and to a plastic product produced by an extruder . in the invention , crosslinked polyethylene is ground to powder form and mixed with e . g . polyethylene so that the proportion of the crosslinked polyethylene in the mixture is less than 30 %. the mixture is supplied through an extruder for making an extruded plastic product . in this way , crosslinked polyethylene can be recycled in a cost - effective and simple manner , while producing a plastic product that contains recycled crosslinked polyethylene .