Roofing membrane incorporating a central laminated structure
AssigneeBuilding Materials Investment Corporation
InventorsLinlin Xing, Thomas John Taylor
Life of this patent
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Abstract
Exemplary embodiments of a TPO roofing membrane are provided that use a reinforcing laminate having a scrim encapsulated by polymer films as a middle layer of the TPO roofing membrane. The reinforcing laminate can have an upper polypropylene film, a lower polypropylene film, and a scrim fabric provided between the upper polypropylene film and the lower polypropylene film. The scrim fabric can be a polyester scrim fabric or a glass scrim fabric. The upper and/or lower polypropylene films can be filled with a reflective pigment and/or a fire retardant.
Claims20
A reinforcing laminate for a middle layer of a polyolefin roofing membrane comprising:
- an upper polypropylene film;
- a lower polypropylene film;
- and
- a scrim fabric provided between the upper polypropylene film and the lower polypropylene film.
A thermoplastic polyolefin roofing membrane comprising:
- a top layer;
- a bottom layer;
- and
- a reinforcing laminate provided between the top layer and bottom layer, the reinforcing laminate comprising:
- an upper polypropylene film;
- a lower polypropylene film;
- and
- a scrim fabric provided between the upper polypropylene film and the lower polypropylene film.
A method of manufacturing a thermoplastic polyolefin roofing membrane, comprising:
- providing an upper layer of a thermoplastic polyolefin roofing membrane;
- providing a bottom layer of a thermoplastic polyolefin roofing membrane;
- providing a reinforcing laminate between the upper layer and the bottom layer of the thermoplastic polyolefin roofing membrane, wherein providing the reinforcing laminate comprises:
- providing an upper polypropylene film;
- providing a lower polypropylene film;
- and
- providing a scrim fabric between the upper polypropylene film and the lower polypropylene film;
- and
- fusing the upper layer to the bottom layer through one or more interstices of the scrim fabric of the reinforcing laminate.
Dependencies are inferred from the claim text.