# US 9,517,612 B2 · Floor material using PLA resin > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,517,612 B2 - Document ID: US9517612B2 - Status: Granted - Kind: B2 - Application number: 13/634,485 - Filed: 2011-03-15 - Published: 2013-01-03 - Granted: 2016-12-13 - Earliest claimed: 2010-03-15 - Assignees: LG Hausys, Ltd. - Applicants: Cheng-Zhe Huang; Ji-Young Kim; Ki-Bong Park; Chang-Won Kang; Jun-Hyuk Kwon; Hyun-Jong Kwon; Sang-Sun Park; Jang-Ki Kim; Gyeong-Min Lee - Inventors: Cheng-Zhe Huang; Ji-Young Kim; Ki-Bong Park; Chang-Won Kang; Jun-Hyuk Kwon; Hyun-Jong Kwon; Sang-Sun Park; Jang-Ki Kim; Gyeong-Min Lee - Web page: https://patentgrep.com/patent/US9517612B2 ## CPC - B32B 27/36: comprising polyesters - B32B 2307/412: Transparent - B32B 2471/00: Floor coverings (B32B2419/04 takes precedence) - E04F 15/105: {of organic plastics with or without reinforcements or filling materials} - E04F 15/107: {composed of several layers, e.g. sandwich panels (layered products in general B32B; producing decorative panels or veneers B44C5/04)} - Y10T 428/24868: Translucent outer layer - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - E04F: FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS (windows, doors E06B) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Disclosed is a flooring material using an environment-friendly PLA resin. According to the present invention, the flooring material using the PLA resin comprises: a base layer; a print layer which is formed on top of the base layer, and has a print pattern on an upper side thereof; and a transparent layer which is formed on top of the print layer, wherein one or more of the base layer, the print layer, and the transparent layer include polylactic acid (PLA) resin. ## Claims ### Claim 1 A flooring material using a polylactic acid (PLA) resin, comprising: a base layer; a print layer formed on top of the base layer and having a printed pattern on an upper surface of the print layer; a transparent layer formed on the top of the print layer; and an anti-hydrolysis agent, wherein the base layer, the print layer and the transparent layer include a 100% amorphous PLA resin comprising acetyl tributyl citrate as a non-phthalate plasticizer, styrene-methacrylate-glycidyl acrylate polymer as a chain extender and an acrylic copolymer as a melt strength enhancer, wherein the base layer comprises 5 to 100 parts by weight of acetyl tributyl citrate, 0.01 to 10 parts by weight of styrene-methacrylate-glycidyl acrylate polymer and 0.1 to 20 parts by weight of the acrylic copolymer based on 100 parts by weight of the PLA resin, the base layer further comprising at least 10 parts by weight but less than 200 parts by weight of wood flour and/or at least 5 parts by weight but less than 20 parts by weight of pine resin based on 100 parts by weight of the PLA resin, wherein the print layer comprises 5 to 60 parts by weight of acetyl tributyl citrate, 0.01 to 10 parts by weight of styrene-methacrylate-glycidyl acrylate polymer and 0.1 to 20 parts by weight of the acrylic copolymer based on 100 parts by weight of the PLA resin, and wherein the transparent layer comprises 5 to 50 parts by weight of acetyl tributyl citrate, 0.01 to 10 parts by weight of styrene-methacrylate-glycidyl acrylate polymer, 10 parts by weight or less of the anti-hydrolysis agent and 0.1 to 20 parts by weight of the acrylic copolymer based on 100 parts by weight of the PLA resin. ### Claim 2 (depends on 1) The flooring material of claim 1, further comprising: a surface treatment layer formed on top of the transparent layer. ### Claim 3 (depends on 1) The flooring material of claim 1, wherein the transparent layer has a thickness of 0.10 to 1.0 mm. ### Claim 4 (depends on 1) The flooring material of claim 1, wherein the print layer has a thickness of 0.01 to 0.3 mm. ### Claim 5 (depends on 1) The flooring material of claim 1, wherein the base layer has a thickness of 1.00 to 5.0 mm. ### Claim 6 (depends on 1) The flooring material of claim 1, wherein the anti-hydrolysis agent is selected from the group including: polycarbodiimide, carbodiimide, and oxazoline. ### Claim 7 (depends on 1) The flooring material of claim 1, comprising: a release layer formed on a lower surface of the base layer, wherein the release layer includes the PLA resin. ### Claim 8 (depends on 7) The flooring material of claim 7, wherein the release layer has a thickness of 0.10 to 2.0 mm. ### Claim 9 (depends on 7) The flooring material of claim 7, wherein the release layer comprises 5 to 60 parts by weight of the non-phthalate plasticizer and 0.1˜20 parts by weight of the acrylic copolymer based on 100 parts by weight of the PLA resin. ### Claim 10 (depends on 9) The flooring material of claim 9, wherein the release layer further comprises at least one of 0.01 to 10 parts by weight of the lubricant, 0.01 to 10 parts by weight of the chain extender, 10 parts by weight or less of the anti-hydrolysis agent, 500 parts by weight or less of calcium carbide, 200 parts by weight or less of wood flour, and 20 parts by weight or less of pine resin based on 100 parts by weight of the PLA resin. ### Claim 11 (depends on 1) The flooring material of claim 1, wherein the PLA resin further comprises at least one of a lubricant. ### Claim 12 (depends on 11) The flooring material of claim 11, wherein the PLA resin further comprises at least one of calcium carbide and titanium dioxide. ### Claim 13 (depends on 11) The flooring material of claim 11, wherein the transparent layer further comprises at least one of 0.01 to 10 parts by weight of the lubricant and 10 parts by weight or less of the anti-hydrolysis agent based on 100 parts by weight of the PLA resin. ### Claim 14 (depends on 11) The flooring material of claim 11, wherein the print layer further comprises at least one of 0.01 to 10 parts by weight of the lubricant, 10 parts by weight or less of the anti-hydrolysis agent, 100 parts by weight or less of calcium carbide (CaCO3), and 50 parts by weight or less of titanium dioxide (TiO2) based on 100 parts by weight of the PLA resin. ### Claim 15 (depends on 11) The flooring material of claim 11, wherein the base layer further comprises 0.01 to 10 parts by weight of a higher fatty acid as the lubricant, 10 parts by weight or less of the anti-hydrolysis agent, and calcium carbide 1,000 parts by weight or less based on 100 parts by weight of the PLA resin.