公开(公告)号：US20220266181A1

公开(公告)日：2022-08-25

申请号：US17631235

申请日：2020-08-12

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Himanshu Jasuja ,  Kent B. Willgohs ,  Jacob J. Thelen ,  John D. Stelter ,  Samatha D. Smith ,  Patrick J. Sager ,  William J. Kopecky ,  Bryan L Gerhardt ,  Andrew R. Fox ,  Alexander P. Flage ,  Michael R. Berrigan ,  Zachary J. Becker

IPC: B01D39/16 ,  B01D46/52

Abstract: A single-layer spunbonded air-filtration web including meltspun autogenously bonded electret fibers with an Actual Fiber Diameter of from 3.0 microns to 9.0 microns. The air-filtration web exhibits a mean flow pore size of from 8.0 to 19 microns and exhibits a ratio of mean flow pore size to pore size range of from 0.55 to 2.5. Also disclosed are methods of making such webs, and methods of using such webs to perform air filtration.

公开(公告)号：US11839845B2

公开(公告)日：2023-12-12

申请号：US17263875

申请日：2019-07-19

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Zhiqun Zhang ,  Edward Keith Willis ,  Jacob J. Thelen ,  Daniel E. Johnson ,  Bryan L. Gerhardt ,  Michael R. Berrigan

IPC: B01D46/52 ,  B01D39/16 ,  B01D46/00 ,  D04H3/033 ,  D04H3/16 ,  D06C15/02 ,  D06C15/08

CPC classification number: B01D39/1623 ,  B01D46/0001 ,  B01D46/0005 ,  B01D46/0032 ,  B01D46/521 ,  D04H3/033 ,  D04H3/16 ,  D06C15/02 ,  D06C15/08 ,  B01D2239/0208 ,  B01D2239/0435 ,  B01D2239/0618 ,  B01D2239/0627 ,  B01D2239/10 ,  B01D2239/1266 ,  D10B2505/04

Abstract: A relofted, spunbonded nonwoven web exhibiting a solidity of from less than 8.0%, to at least 3.0%, and exhibiting a Quality Factor of at least 0.30. Methods of making a relofted web; and, methods of using a relofted web as an air-filtration web, e.g. as a filter media or a layer thereof.

公开(公告)号：US20200208314A1

公开(公告)日：2020-07-02

申请号：US16631443

申请日：2018-07-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Eugene G. Joseph ,  Saurabh Batra ,  Michael R. Berrigan ,  John D. Stelter ,  Jacob J. Thelen ,  Zackary J. Becker ,  Liyun Ren ,  Sachin Talwar ,  Michael D. Romano

IPC: D04H1/4291 ,  D01F1/10 ,  D01F6/04 ,  D01D5/088

Abstract: Nonwoven webs including one or more semi-continuous filaments made of a mixture including from about 50% w/w to about 99% w/w of at least one crystalline polyolefin (co)polymer, and from about 1% w/w to about 40% w/w of at least one hydrocarbon tackifier resin. The at least one semi-continuous filament exhibits molecular orientation, and at least one of the crystalline polyolefin (co)polymer or the nonwoven web exhibits a Heat of Fusion measured using Differential Scanning Calorimetry of greater than 50 Joules/g. A process for making the semi-continuous filaments and nonwoven webs is also disclosed.

公开(公告)号：US20240269494A1

公开(公告)日：2024-08-15

申请号：US18681792

申请日：2022-08-15

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Nicholas K. Lee ,  Liyun Ren ,  Tanya L. Beckwith ,  Gina M. Daveloose ,  Jeffrey G. Linert ,  Jacob T. Lusson ,  John D. Stelter ,  Jacob J. Thelen

IPC: A62B23/02 ,  B01D39/16

CPC classification number: A62B23/02 ,  B01D39/163 ,  B01D2239/0435 ,  B01D2239/0627 ,  B01D2239/065

Abstract: Provided are face coverings that include a cover panel made from a cover panel material, a filter made from a filtration media adjacent the cover panel, and a retaining system for securing the face covering to a wearer's face. The face coverings can further include a gasket comprising gasket material connected to a perimeter of the cover panel and configured to contact to a wearer's face. The pressure drop across a combination of the cover panel material and the filtration media is from 45% to 75% of the pressure drop across the gasket material, enabling filtration of airborne contaminants allowing for reduced retaining tension and improved comfort to the wearer.

公开(公告)号：US20220266180A1

公开(公告)日：2022-08-25

申请号：US17628683

申请日：2020-08-12

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： John D. Stelter ,  Zachary J. Becker ,  Michael R. Berrigan ,  Alexander P. Flage ,  Andrew R. Fox ,  Bryan L. Gerhardt ,  Himanshu Jasuja ,  William J. Kopecky ,  Patrick J. Sager ,  Samatha D Smith ,  Jacob J. Thelen ,  Kent B. Willgohs

IPC: B01D39/16 ,  D04H3/16 ,  D04H3/14

Abstract: A single-layer spunbonded air-filtration web including meltspun autogenously bonded electret fibers with an Actual Fiber Diameter of from 3.0 microns to 15 microns. The air-filtration web exhibits a ratio of mean flow pore size to pore size range of from 0.55 to 2.5. Also disclosed are methods of making such webs, and methods of using such webs to perform air filtration.

公开(公告)号：US20210229012A1

公开(公告)日：2021-07-29

申请号：US17263875

申请日：2019-07-19

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Zhiqun Zhang ,  Edward Keith Willis ,  Jacob J. Thelen ,  Daniel E. Johnson ,  Bryan L. Gerhardt ,  Michael R. Berrigan

IPC: B01D39/16 ,  B01D46/52 ,  B01D46/00 ,  D04H3/033 ,  D04H3/16 ,  D06C15/02 ,  D06C15/08

Abstract: A relofted, spunbonded nonwoven web exhibiting a solidity of from less than 8.0%, to at least 3.0%, and exhibiting a Quality Factor of at least 0.30. Methods of making a relofted web; and, methods of using a relofted web as an air-filtration web, e.g. as a filter media or a layer thereof.