Impact resistant roofing shingles and process of making same
View Patent ↗An impact resistant roofing shingle which includes an asphalt coated substrate whose unexposed surface is laminated to an organic film. A process of forming that shingle includes the step of applying an organic film, by spraying a latex, by applying a rubber polymer modified asphalt, by compressing a plastic film having a higher melting or decomposition temperature than the melting point of the asphalt coating or by applying an adhesive to which a plastic film is applied to the unexposed surface of the asphalt coated substrate.
1. An impact resistant roofing shingle comprising:
a non-woven glass fiber substrate having an exposed side and an unexposed side;
an asphalt coating applied to the exposed side and the unexposed side, the asphalt coating having a first melting temperature;
a plurality of granules directly layered on the asphalt coating of the exposed side;
an organic film adhered to the asphalt coating of the unexposed side, the organic film having high-impact resistance qualities and a second melting temperature; and
a rubber polymer modified asphaltic adhesive adhered to the asphalt coating of the unexposed side and adhered to the organic film, the modified asphaltic adhesive having a third melting temperature,
wherein the third melting temperature is higher than the first melting temperature thereby allowing the modified asphaltic adhesive to prevent and seal cracks that may develop in the roofing shingle, and the second melting temperature being independent from the first and third melting temperatures.
2. A shingle in accordance with claim 1 wherein the second melting temperature is higher than the first melting temperature.
3. A shingle in accordance with claim 1 wherein the second melting temperature is equal to the first melting temperature.
4. A shingle in accordance with claim 1 wherein the second melting temperature is lower than the first melting temperature.
5. A shingle in accordance with claim 1 wherein said organic film is any class of plastic films that are useful in the manufacture of impact resistant roofing shingles regardless of melting temperature.
6. A shingle in accordance with claim 1 wherein said organic film is a plastic film.
7. A shingle in accordance with claim 1 wherein said organic film is a latex plastic.
8. A shingle in accordance with claim 7 wherein said latex plastic is selected from the group consisting of a polyurethane, a polyacrylate and polyvinyl halide.
9. A shingle in accordance with claim 1 wherein said rubber polymer modified asphaltic adhesive contains one of styrene-butadiene-styrene (SBS), styrene-butadiene rubber (SBR), styrene-ethylene-butadiene-styrene (SEBS), styrene-isoprene-styrene (SIS) and mixtures thereof.
10. A shingle in accordance with claim 1 , wherein said organic film is selected from the group consisting of polyamide films and polyester films.
11. A shingle in accordance with claim 1 , wherein said organic film is polyethylene terephthalate film.
12. A shingle in accordance with claim 1 wherein said modified asphalt adhesive may contain a rubber polymer, an acrylic, a polyurethane or a silicone.
13. A shingle in accordance with claim 1 wherein said substrate is a web, a scrim or a felt of a fibrous material.
14. The shingle in accordance with claim 13 , wherein said fibrous material is selected from the group consisting of mineral fibers, cellulosic fibers, rag fibers, synthetic fibers and mixtures thereof.
15. A shingle in accordance with claim 1 wherein said organic film is a polyolefin film.
16. A shingle in accordance with claim 1 wherein said asphalt coating is a cooled asphalt.