Methods for manufacturing a paint roller and component parts thereof

摘要

Described are methods of making a thermoplastic core paint roller using a composite cover material having a backing made from a compound comprising a polypropylene-based elastomer and calcium carbonate having between 5% and 50% calcium carbonate by weight. One or various compounds of polypropylene and calcium carbonate having between 5% and 66% calcium carbonate by weight may be used to form portions of one or multiple components that make up the paint roller, including, for example, the thermoplastic strips and/or the adhesives. The materials can be assembled in a continuous manufacturing process.

主权项

1. A method of making a paint roller comprising the steps of:
helically winding a strip of material around a mandrel so as to form a helically wound strip; advancing the wound strip along the mandrel; extruding a polypropylene-based compound to form a smoothly flowing layer of adhesive, the polypropylene-based compound comprising
(i) at least 5% but not more than 66% calcium carbonate by weight; and(ii) a polypropylene resin; applying the layer of adhesive onto an outer surface of the wound strip; helically wrapping a strip of composite cover material about the wound strip and over the layer of adhesive, the composite cover material having a backing with a thickness of about 10 to 40 mils and comprising
(i) at least 25% but not more than 50% calcium carbonate by weight; and(ii) polypropylene-based elastomer; allowing the adhesive to cool, thereby bonding the strip of cover material to the wound strip.