-
11.发明申请公开(公告)号：US20210095405A1
公开(公告)日：2021-04-01
申请号：US15733240
申请日：2018-12-14
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Liyun L. Ren , Pingfan Wu , Daniel J. Zillig , Sachin Talwar , Jonathan H. Alexander , Ta-Hua Yu , Moses M. David , James A. Phipps
Abstract: Dimensionally-stable fibrous structures including ceramic-coated melt-blown nonwoven fibers made of a flame-retarding polymer and processes for producing such fire-resistant nonwoven fibrous structures. The melt-blown fibers include poly(phenylene sulfide) in an amount sufficient for the nonwoven fibrous structures to pass one or more fire-resistance test, e.g. UL 94 V0, FAR 25.853 (a), FAR 25.856 (a), and CA Title 19, without any halogenated flame-retardant additive, and have a ceramic coating. The melt-blown fibers are subjected to a controlled in-flight heat treatment at a temperature below a melting temperature of the poly(phenylene sulfide) immediately upon exiting from at least one orifice of a melt-blowing die, in order to impart dimensional stability to the fibers. The nonwoven fibrous structures including the in-flight heat-treated melt-blown fibers exhibit a Shrinkage less than a Shrinkage measured on a nonwoven fibrous structure including only fibers not subjected to the controlled in-flight heat treatment operation, generally less than 15%.
-
公开(公告)号：US10352210B2
公开(公告)日：2019-07-16
申请号：US15503906
申请日：2015-09-09
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Thomas P. Hanschen , Jonathan H. Alexander , Paul A. Martinson , John Stuart Bolton , Seungkyu Lee , Thomas Herdtle , Ronald W. Gerdes
Abstract: Provided acoustic devices include an external housing defining an expansion chamber and a wall extending through and partitioning the expansion chamber into a central chamber and a peripheral chamber adjacent the central chamber, wherein an inlet and outlet communicate with the central chamber, and wherein the wall includes a plurality of apertures formed therethrough to allow air movement to and from the central and expansion chambers, the plurality of apertures sized to provide an average flow resistance ranging from 100 MKS Rayls to 5000 MKS Rayls. The acoustic devices advantageously show significant sound attenuation while streamlining air flow to reduce pressure drop across the expansion chamber.
-
公开(公告)号：US20180156296A1
公开(公告)日：2018-06-07
申请号：US15575152
申请日：2016-06-15
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Jonathan H. Alexander , Georg Eichhorn , Ronald W. Gerdes , Thomas P. Hanschen , Thomas Herdtle , Taewook Yoo
CPC classification number: F16F9/306 , B32B3/266 , B32B3/30 , B32B7/12 , B32B15/085 , B32B15/20 , B32B2307/102 , B60R13/0212 , B60R13/0243 , B60R13/0256 , B60R13/0815 , B62D25/20 , F16F1/3737 , F16F2226/042 , F16F2234/06
Abstract: A multilayer damping material for damping a vibrating surface comprising: at least one constraining layer; at least one dissipating layer; and at least one kinetic spacer layer comprising multiple spacer elements. The kinetic spacer layer is arranged between the constraining layer and the vibrating surface, when used for damping the vibrating surface. Each spacer element has opposite ends. At least one end of each of the multiple spacer elements is embedded in, bonded to, in contact with, or in close proximity to the dissipating layer, such that energy is dissipated within the multilayer damping material, through movement of the at least one end of each of the multiple spacer elements.
-
公开(公告)号：US20170241310A1
公开(公告)日：2017-08-24
申请号：US15503906
申请日：2015-09-09
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Thomas P. Hanschen , Jonathan H. Alexander , Paul A. Martinson , John Stuart Bolton , Seungkyu Lee , Thomas Herdtle , Ronald W. Gerdes
CPC classification number: F01N1/006 , F01N1/026 , F01N13/02 , F01N2470/02 , F01N2470/24 , F01N2490/155 , F02M35/1216 , F02M35/1255 , F24F13/24 , F24F2013/245 , G10K11/161
Abstract: Provided acoustic devices include an external housing defining an expansion chamber and a wall extending through and partitioning the expansion chamber into a central chamber and a peripheral chamber adjacent the central chamber, wherein an inlet and outlet communicate with the central chamber, and wherein the wall includes a plurality of apertures formed therethrough to allow air movement to and from the central and expansion chambers, the plurality of apertures sized to provide an average flow resistance ranging from 100 MKS Rayls to 5000 MKS Rayls. The acoustic devices advantageously show significant sound attenuation while streamlining air flow to reduce pressure drop across the expansion chamber.
-
-
-
Search Results
14
records
(took 0.018 seconds)
