US 12,030,282 B2
Co-extrusion SPC foam flooring and manufacturing method thereof
Jiangang Song, Zhejiang (CN); Jiajin Fu, Zhejiang (CN); and Fuqing Liu, Zhejiang (CN)
Assigned to UNILIN, BV, Wielsbeke (BE)
Appl. No. 17/783,880
Filed by FLOORING INDUSTRIES LIMITED, SARL, Bertrange (LU)
PCT Filed Sep. 25, 2019, PCT No. PCT/CN2019/107717
§ 371(c)(1), (2) Date Jun. 9, 2022,
PCT Pub. No. WO2021/031289, PCT Pub. Date Feb. 25, 2021.
Claims priority of application No. 201910757502.1 (CN), filed on Aug. 16, 2019.
Prior Publication US 2023/0064465 A1, Mar. 2, 2023
Int. Cl. B32B 27/06 (2006.01); B32B 5/18 (2006.01); B32B 27/08 (2006.01); B32B 27/20 (2006.01); B32B 27/30 (2006.01)
CPC B32B 27/065 (2013.01) [B32B 5/18 (2013.01); B32B 27/08 (2013.01); B32B 27/20 (2013.01); B32B 27/304 (2013.01); B32B 2255/10 (2013.01); B32B 2262/101 (2013.01); B32B 2262/106 (2013.01); B32B 2264/104 (2013.01); B32B 2266/0214 (2013.01); B32B 2266/04 (2013.01); B32B 2307/554 (2013.01); B32B 2307/72 (2013.01); B32B 2307/732 (2013.01); B32B 2419/04 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A co-extrusion foam flooring, comprising a stone-plastic base material structure,
wherein the stone-plastic base material structure sequentially comprises, from top to bottom, a first stable layer, a foaming layer and a second stable layer;
the first stable layer and the second stable layer are both sheets with a PVC resin and filler powder as main components;
wherein an amount of the PVC resin is 100 parts by weight and the amount of the filler powder is 200 to 300 parts by weight; and
wherein the foaming layer is a physical foaming layer comprising carbon dioxide as a physical foaming agent and the following components in parts by weight: 100 parts of polyvinyl chloride resin powder, 300 to 330 parts of calcium carbonate, 4 to 7 parts of a calcium zinc stabilizer, 1 to 1.5 parts of an internal lubricant, 1 to 1.5 parts of polyethylene wax, 4 to 8 parts of chlorinated polyethylene, 3 to 5 parts of acrylate, and 0.7 to 1.2 parts of a composite lubricant;
wherein a density of the foam flooring is in a range of 1.4 to 1.6 g/cm3;
wherein the filler powder is calcium carbonate or comprises calcium carbonate as a main component and one material selected from the group consisting of calcium bicarbonate, glass fiber and carbon fiber or any mixture thereof.