Patent ID: 9739067
Date: 2017-08-22
CPC Classifications: B29B,B29C,B29K,B29L,B32B,C08F,C08L,E04F

Claim:
1. A composite floor comprising, from top to bottom: 1) a scratch-resistant coating layer, which is formed from a polyurethane-based coating; 2) a super-transparent wear-resistant layer, which is formed from a raw material formulation comprising, based on the weight of the total formulation, 85-98% by weight of a polypropylene having a molecular weight of 100,000 to 300,000, 1-12% by weight of a grafted copolymer of propylene and maleic anhydride having a molecular weight of 20,000 to 50,000, wherein the grafting rate of maleic anhydride is 1-10%, 0.2-0.8% by weight of a nucleating agent, 0.1-0.5% by weight of an antioxidant, 0.2-0.8% by weight of an ultraviolet light absorber, and 0.2-0.5% by weight of a light stabilizer, wherein the super-transparent wear-resistant layer has a haze of less than 11% and a light transmittance of greater than 90%; 3) a decorative layer, which is a layer of ink-printed environment-friendly composite paper or a layer formed through a thermal transfer process; 4) a first substrate layer having a raw material formulation comprising, based on the weight of the total formulation, 0.5-4.5% by weight of a first polypropylene homopolymer having a melt index of 0.1-0.35 g/10 min, 0.5-4.5% by weight of a second polypropylene homopolymer having a melt index of 5-30 g/10 min, 1-3% by weight of a polyethylene homopolymer having a melt index of 2-4 g/10 min, 1-5% by weight of glass fiber with a length of 0.4-0.8 mm, wherein, the first polypropylene homopolymer and the second polypropylene homopolymer form a polypropylene blend, and based on the total weight of the first substrate layer, the weight percentage of the polypropylene blend is represented by “wt % pp”, the weight percentage of the polyethylene homopolymer is represented by “wt % pe”, the average melt index of the polypropylene blend is represented by “MIpp”, the melt index of the polyethylene homopolymer is represented by “MIpe”, and 5) a second substrate layer having a raw material formulation comprising, based on the weight of the total formulation, 0.5-1.5% by weight of a first polypropylene homopolymer having a melt index of 0.1-0.35 g/10 min, and 0.5-1.5% by weight of a second polypropylene homopolymer having a melt index of 5-30 g/10 min, 9-10% by weight of a polyethylene homopolymer having a melt index of 2-4 g/10 min, 1-5% by weight of glass fiber with a length of 0.4-0.8 mm, 0.5-2% by weight of an ethylene-octene copolymer, 2-5% by weight of wollastonite powder, 60-85% by weight of calcium carbonate powder, and 1-6% by weight of an intumescent flame retardant; wherein, the first polypropylene homopolymer and the second polypropylene homopolymer form a polypropylene blend, and based on the total weight of the second substrate layer, the weight percentage of the polypropylene blend is represented by “wt % pp”, the weight percentage of the polyethylene homopolymer is represented by “wt % pe”, the average melt index of the polypropylene blend is represented by “MIpp”, the melt index of the polyethylene homopolymer is represented by “MIpe”, and 6) a bottom connective layer formed from a polypropylene-based material and having a rough surface formed by embossing, wherein the bottom connective layer has a raw material formulation comprising, based on the weight of the total formulation, 85-98% by weight of a polypropylene homopolymer having a molecular weight of 100,000 to 300,000, 1-12% by weight of a polypropylene-maleic anhydride grafted copolymer having a molecular weight of 20,000 to 50,000, wherein the grafting rate of the maleic anhydride is 1-10%, 0.1-0.5% by weight of an antioxidant, 0.2-0.5% by weight of an ultraviolet light absorber, and 0.2-0.5% by weight of a light stabilizer; and optionally 7) a back adhesive layer, which is a hot melt adhesive layer applied on the bottom surface of the bottom connective layer.