초록

Surface coverings, such as floor coverings, with an interlocking design are described. Methods of making the surface coverings are further described.

대표청구항 ▼

What is claimed is: 1. A floor plank comprising:a) a first sheet having four sides, the first sheet having an upper surface and a lower surface and said first sheet comprising at least one base layer, a print design located above said base layer, and at least one wear layer located above said print

What is claimed is: 1. A floor plank comprising:a) a first sheet having four sides, the first sheet having an upper surface and a lower surface and said first sheet comprising at least one base layer, a print design located above said base layer, and at least one wear layer located above said print design; andb) a second sheet having multiple sides and having an upper surface and a lower surface, the upper surface of the second sheet being adhered to the lower surface of the first sheet; wherein two adjacent sides of the second sheet has multiple projections to interlock with recesses from at least one adjacent floor plank and two other adjacent sides have recesses to interlock with projections from at least one adjacent floor plank;wherein said projections and recesses have a complementary shape to each other to be interlockingly engageable with corresponding recesses or projections on an adjacent floor plank;wherein the multiple projections of said two adjacent sides of the second sheet extend beyond two adjacent sides of the first sheet and the recesses of said two other adjacent sides of the second sheet do not extend beyond said first sheet and are concealed by said first sheet;wherein at least a portion of the lower surface of the first sheet that is located directly above said recesses have at least one adhesive coating that permits adhesion of an upper surface of a projection from an adjacent floor plank or the upper surfaces of the projections have an adhesive coating or both, wherein said floor plank having one or more of the following mechanical properties:i. Tensile strength (psi)—ASTM D638: 750 psi +/−55 psi;ii. Elongation (%)—ASTM D638: 34+/−9;iii. Break Load (lbf)—ASTM D638: 31+/−1.5;iv. Flexural Force @ 0.3″ (lbf)—Modified ASTM D790: 1+/−0.35;v. Pneumatic Indentation at 3000 psi (inch)—<0.005; and/orvi. Residual Indentation at 750 psi (inch)—ASTM F-970: <0.002.