Systems and methods for improving adhesion of an insulating foam to a molded polymeric insulating structure through use of ozone gas for functionalization of molded polymeric surfaces of an internal cavity of the insulating structure.

The invention relates to a method for manufacturing a hoisting rope, comprising the steps of providing a plurality of elongated composite members, which composite members are made of composite material comprising reinforcing fibers in polymer matrix; and arranging the composite members to form an elongated row of parallel composite members, which row has a longitudingal direction, a thickness direction and a width direction, and in which row the composite members are positioned side by side such that they are parallel to each other, and spaced apart from each other in width direction of the row; and directing plasma treatment on the outer surface of the composite members; and embedding the composite members in fluid polymer material; and solidifying the polymer material wherein the composite members are embedded. The invention relates also to a hoisting rope obtained with the method and an elevator comprising the hoisting rope.

A method and apparatus are provided for producing pre-insulated pipes, which can be configured both for producing corrugated pipes and smooth pipes. The new method does not require a film to enclose expanding foam insulation around an inner pipe prior to it being enclosed by a jacket casing. Instead, a jacket casing is extruded around the inner pipe, the inner pipe and casing fed into a vacuum unit and the inside of the jacket casing is surface treated to ensure adherence between layers just after it exits the extruder and before it is fed into a vacuum unit. Inside the vacuum unit, a dispenser dispenses liquid expanding insulation material (such as polyurethane) in the space between the jacket casing and the inner pipe.