Patent ID: 7419717

Claim:
A thermoplastic laminate plank comprising: a rigid core comprising at least one thermoplastic material, wherein said core has a top surface and a bottom surface, and opposing sides; a print layer optionally with an underlay affixed to said top surface of said core, wherein said print layer has a top surface and a bottom surface, wherein said print layer comprising a printed design; and a protective layer affixed to said top surface of said print layer, wherein said thermoplastic laminate plank is not susceptible to damage caused by moisture, wherein said core has a thickness of from about 5 mm to about 20 mm, a width of from about 2 cm to about 30 cm, and a length of from about 30 cm to about 130 cm, said thermoplastic plank has no cup distortion where the top ends of the plank come closer together, said thermoplastic laminate plank has a surface tension of 34 dyne-cm or higher, and wherein said core has a tongue design on at least one edge and a groove design on at least an opposite edge, wherein said at least one thermoplastic material is polyvinyl chloride.