ROOFING SHINGLE WITH POLYMER FILM BACKING

摘要

A roofing shingle is a composite sheet which includes a roofing substrate having a front side and a back side. An asphalt material impregnates the substrate and coats at least the front side of the substrate. A polymer film is attached to the back side of the substrate and forms a back surface of the roofing shingle. The polymer film was applied to the substrate in the form of a film. The roofing shingle does not include backdust on the back surface. The composite sheet is formed into the size and shape of the roofing shingle. A method of manufacturing roofing shingles includes continuously supplying a roofing substrate having a front side and a back side. An asphalt material is applied to the substrate so that it impregnates the substrate and coats at least the front side of the substrate. A composite sheet is produced by providing a polymer film and attaching the polymer film to the back side of the substrate in a manner that avoids applying backdust to the substrate so that the polymer film forms a back surface of the composite sheet. The composite sheet is cut into roofing shingles while maintaining the back surface free of backdust.