公开(公告)号：WO2019012426A1

公开(公告)日：2019-01-17

申请号：PCT/IB2018/055082

申请日：2018-07-10

申请人： 3M INNOVATIVE PROPERTIES COMPANY

发明人： VARGHESE, Alex ,  VASHISTHA, Deval Yogendra SurendraKumar ,  BHATTACHARYA, Dhritisunder ,  PALLED, Satish

IPC分类号： D04H1/4282 ,  B60R13/08 ,  D04H1/4291 ,  D04H1/435

摘要： A conformable noise control article useful reducing noise in a motor vehicle is provided. The article includes a nonwoven fiber web that is impregnated with a polymeric matrix composition having low (Tg) and high (Tg) polymers, additives and inorganic fillers. The density of the noise control article is at least ten times more than the density of the nonwoven fiber web. The article has an air flow resistivity that is at least ninety times greater than the air flow resistivity of a bare nonwoven web and exhibits a sound transmission loss in the frequency spectrum of 125 Hz to 5000 Hz.

公开(公告)号：WO2021255707A1

公开(公告)日：2021-12-23

申请号：PCT/IB2021/055406

申请日：2021-06-18

申请人： 3M INNOVATIVE PROPERTIES COMPANY

发明人： VARGHESE, Alex ,  BHATTACHARYA, Dhritisunder ,  VASHISTHA, Deval Yogendra ,  PALLED, Satish Veerappa

IPC分类号： G10K11/165 ,  B23B27/12 ,  B23B27/20 ,  G10K11/168 ,  B32B1/00 ,  B32B2250/02 ,  B32B2250/20 ,  B32B2255/02 ,  B32B2255/26 ,  B32B2262/0253 ,  B32B2262/0261 ,  B32B2262/0276 ,  B32B2262/062 ,  B32B2262/144 ,  B32B2264/10 ,  B32B2307/102 ,  B32B2307/51 ,  B32B2307/718 ,  B32B2307/724 ,  B32B2307/7242 ,  B32B2605/08 ,  B32B5/022 ,  B32B5/08 ,  B32B5/268 ,  B32B5/271 ,  B60R13/08 ,  D06N7/0005

摘要： Embodiments of the present invention relates to a noise reduction article (300) and method of manufacturing same. The noise reduction article (300) comprises at least one of polymeric resins and inorganic fillers being deposited on a porous layer (304) and heat treated together to form a unibody, wherein the at least one of polymeric resins and inorganic fillers on the heat treatment forms an impervious layer (302), and the porous layer comprises at least one fiber forming polymer.