公开(公告)号：US20170347724A1

公开(公告)日：2017-12-07

申请号：US15682600

申请日：2017-08-22

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Seyed A. Angadjivand ,  James E. Springett ,  John M. Brandner ,  Marvin E. Jones ,  Andrew R. Fox ,  Michael R. Berrigan ,  John D. Stelter

IPC: A41D13/11 ,  A62B23/02 ,  D04H3/14 ,  D04H3/16

CPC classification number: A41D13/113 ,  A62B23/025 ,  D04H3/14 ,  D04H3/16

Abstract: A flat-fold respirator is made from a stiff filtration panel joined to the remainder of the respirator through at least one line of demarcation. The panel contains a porous monocomponent monolayer nonwoven web that contains charged intermingled continuous monocomponent polymeric fibers of the same polymeric composition and that has sufficient basis weight or inter-fiber bonding so that the web exhibits a Gurley Stiffness greater than 200 mg and the respirator exhibits less than 20 mm H2O pressure drop. The respirator may be formed without requiring additional stiffening layers, bicomponent fibers, or other reinforcement and can be flat-folded for storage. Scrap from the manufacturing process may be recycled to make additional stiff filtration panel web.

公开(公告)号：US10575571B2

公开(公告)日：2020-03-03

申请号：US15682600

申请日：2017-08-22

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Seyed A. Angadjivand ,  James E. Springett ,  John M. Brandner ,  Marvin E. Jones ,  Andrew R. Fox ,  Michael R. Berrigan ,  John D. Stelter

IPC: A41D13/11 ,  A62B23/02 ,  D04H3/14 ,  D04H3/16

Abstract: A flat-fold respirator is made from a stiff filtration panel joined to the remainder of the respirator through at least one line of demarcation. The panel contains a porous monocomponent monolayer nonwoven web that contains charged intermingled continuous monocomponent polymeric fibers of the same polymeric composition and that has sufficient basis weight or inter-fiber bonding so that the web exhibits a Gurley Stiffness greater than 200 mg and the respirator exhibits less than 20 mm H2O pressure drop. The respirator may be formed without requiring additional stiffening layers, bicomponent fibers, or other reinforcement and can be flat-folded for storage. Scrap from the manufacturing process may be recycled to make additional stiff filtration panel web.