US 12,434,454 B2
Waterproof and moisture-permeable composite material
Chih-Yi Lin, Kaohsiung (TW); Kuo-Kuang Cheng, Kaohsiung (TW); Kao-Lung Yang, Kaohsiung (TW); and Wei-Jie Liao, Kaohsiung (TW)
Assigned to SAN FANG CHEMICAL INDUSTRY CO., LTD., Kaohsiung (TW)
Filed by SAN FANG CHEMICAL INDUSTRY CO., LTD., Kaohsiung (TW)
Filed on Jul. 29, 2022, as Appl. No. 17/877,650.
Claims priority of application No. 110130651 (TW), filed on Aug. 19, 2021.
Prior Publication US 2023/0071900 A1, Mar. 9, 2023
Int. Cl. B32B 5/02 (2006.01); B32B 27/08 (2006.01); D04H 1/56 (2006.01)
CPC B32B 5/022 (2013.01) [B32B 27/08 (2013.01); D04H 1/565 (2013.01); B32B 2250/03 (2013.01); B32B 2250/24 (2013.01); B32B 2250/40 (2013.01); B32B 2274/00 (2013.01); B32B 2305/20 (2013.01); B32B 2307/726 (2013.01); B32B 2367/00 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A multilayer waterproof and moisture-permeable composite material, composed of a first melt-blown non-woven fabric, a waterproof and moisture-permeable membrane and a second melt-blown non-woven fabric, wherein the waterproof and moisture-permeable membrane is disposed between the first melt-blown non-woven fabric and the second melt-blown non-woven fabric; the first melt-blown non-woven fabric and the second melt-blown non-woven fabric are thermoplastic polymer; the thermoplastic polymer is TPEE polymer, and wherein a first average molecular weight (Mn) of the first melt-blown non-woven fabric ranges from 20,000 to 35,000, and a second average molecular weight (Mn) of the second melt-blown non-woven fabric ranges from 20,000 to 30,000.