Patent ID: 8486211
Filing Date: 2013-07-16
Classification: B05C,B29C,B29D,B29K,B29L,B31C

Abstract:
1. A method of making a laminated paint roller comprising the steps of: helically winding a strip comprising polypropylene around a mandrel so as to form a helically wound strip, the strip having an outer surface; advancing the wound strip along the mandrel; applying a molten layer of adhesive comprising polypropylene onto the outer surface of the wound strip; and wrapping a strip of composite cover material about the wound strip and over the layer of adhesive, the composite cover material being formed by the steps of: providing a width of porous pile material having a pile side and a fabric underside; advancing the width of pile material with the fabric underside facing up; extruding a polypropylene-based compound to form a smoothly flowing layer, the compound comprising between 25% and 66% calcium carbonate by weight; applying the smoothly flowing layer as a backing layer having a thickness of about 10 to 40 mils on the fabric underside of the advancing width of pile material so that the layer has one side that is in contact with the fabric underside of the advancing material and an other side that is not in contact with the advancing pile material, the layer being in molten form when it is applied; applying a compressive force to the other side of the layer before the layer hardens and sets, to smooth the other side of the layer of polypropylene, and to urge the layer and the fabric underside of the pile material together, thereby forming a composite material having a smooth or uniformly imprinted non-porous side and a pile side, and wherein the pile is held fast on the composite material; slitting the width of composite material into a strip once the backing layer is no longer in molten form, thereby forming a composite cover material having an inner surface comprising a smooth or uniformly imprinted non-porous polypropylene side and a pile side; and applying a compressive force from without the composite cover material to urge the composite cover material, the layer of adhesive and strip of non-porous polypropylene material together, thereby laminating the smooth inner surface of the composite cover material to the outer surface of the non-porous polypropylene strip.