公开(公告)号：US11235552B2

公开(公告)日：2022-02-01

申请号：US17058258

申请日：2018-07-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： MingZhu Li ,  Pingfan Wu ,  Tien Tsung Wu ,  Eumi Pyun ,  Zhong Hai Cai ,  QiSheng Pan

IPC: B32B5/26 ,  B32B7/027 ,  B32B5/02 ,  B32B7/12

Abstract: Provided is a multilayer thermal insulator and related method that use a non-woven core layer comprising non-meltable and flame-resistant polymeric fibers. One or more scrims are disposed on the opposing major surfaces of the non-woven core layer, and a peripheral edge of the one or more scrims is either edge sealed or capable of being edge sealed to substantially encapsulate the non-woven core layer within the one or more scrims. Optionally, a binder is provided on the scrims or non-woven core layer to facilitate edge sealing. The provided insulators are essentially dust-free and capable of passing stringent flammability standards.

公开(公告)号：US11661687B2

公开(公告)日：2023-05-30

申请号：US17860715

申请日：2022-07-08

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Pingfan Wu ,  Tien Tsung Wu ,  Gerry A. Hoffdahl ,  MingZhu Li

IPC: D04H1/4382 ,  D04H1/435 ,  B29C43/24 ,  D04H1/43 ,  H01M10/658 ,  B29C70/08 ,  D04H1/4374 ,  D04H1/485 ,  B29K233/20 ,  B29C43/52 ,  B29K105/12 ,  B05D1/18

CPC classification number: D04H1/4382 ,  B29C43/24 ,  B29C70/08 ,  D04H1/43 ,  D04H1/435 ,  D04H1/43835 ,  H01M10/658 ,  B05D1/18 ,  B29C2043/522 ,  B29C2043/525 ,  B29K2105/128 ,  B29K2233/20 ,  B32B2250/20 ,  B32B2262/0276 ,  B32B2262/14 ,  D04H1/4374 ,  D04H1/485

Abstract: The provided articles and methods use a non-woven fibrous web containing 60-100 wt % of oxidized polyacrylonitrile fibers; and 0-40 wt % of reinforcing fibers having outer surfaces comprised of a polymer with a melting temperature of from 100° C. to 300° C. The non-woven fibrous web has an average bulk density of from 15 kg/m3 to 50 kg/m3, with the plurality of fibers substantially entangled along directions perpendicular to a major surface of the non-woven fibrous web. Optionally, the oxidized polyacrylonitrile fibers can have a crimped configuration. Advantageously, these articles can display a combination of low thermal conductivity, high tensile strength, and flame resistance.