公开(公告)号：US20220396903A1

公开(公告)日：2022-12-15

申请号：US17250645

申请日：2019-10-07

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Tien T. Wu ,  Pingfan Wu ,  Liyun Ren

IPC: D04H1/544 ,  D04H1/56 ,  D04H1/541 ,  D04H1/43 ,  D04H1/4291 ,  D04H1/485 ,  D04H1/435

Abstract: A nonwoven fibrous web and a method of making thereof. The nonwoven fibrous web includes greater than 0% but no greater than 30 wt % of a plurality of melt-blown fibers comprised of a crystalline (co)polymer; and at least 70 wt % of a plurality of randomly-oriented staple fibers, the plurality of randomly-oriented staple fibers including: at least 60 wt % of oxidized polyacrylonitrile fibers; and from 0 to 40 wt % of reinforcing fibers having an outer surface comprised of a (co)polymer with a melting temperature of from 100° C. to 350° C.; wherein the plurality of melt-blown fibers and the plurality of randomly-oriented staple fibers are bonded together to form a cohesive non-woven fibrous web.

公开(公告)号：US20220136140A1

公开(公告)日：2022-05-05

申请号：US17434454

申请日：2020-02-26

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kristy A. Jost ,  Liyun Ren ,  Rongzhi Huang ,  William J. Kopecky ,  James M. Jonza ,  Andrew J. Ouderkirk

IPC: D01D5/42 ,  B29C48/21 ,  D01F8/14 ,  D01F8/06

Abstract: The present invention is a process for converting a multilayer film to a plurality of nano-ribbons. The process includes co-extruding a first film and a second film to form the multilayer film, slitting the multilayer film to form a plurality of multilayer ribbons, and separating the multilayer ribbons to form a plurality of nano-ribbons having substantially flat cross-sections.