ZA889213B - Electret filter made of fibers containing polypropylene and poly(4-menthul-1-pentene) - Google Patents

Electret filter made of fibers containing polypropylene and poly(4-menthul-1-pentene)

Info

Publication number
ZA889213B
ZA889213B ZA889213A ZA889213A ZA889213B ZA 889213 B ZA889213 B ZA 889213B ZA 889213 A ZA889213 A ZA 889213A ZA 889213 A ZA889213 A ZA 889213A ZA 889213 B ZA889213 B ZA 889213B
Authority
ZA
South Africa
Prior art keywords
menthul
pentene
poly
filter made
fibers containing
Prior art date
Application number
ZA889213A
Other languages
English (en)
Inventor
John Frederick Reed
Frederick Reed John
Marvin Edward Jones
Edward Jones Marvin
Original Assignee
Minnesota Mining & Mfg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Minnesota Mining & Mfg filed Critical Minnesota Mining & Mfg
Publication of ZA889213B publication Critical patent/ZA889213B/xx

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/02—Loose filtering material, e.g. loose fibres
    • B01D39/04—Organic material, e.g. cellulose, cotton
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/28—Plant or installations without electricity supply, e.g. using electrets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
    • H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
    • H01G7/021—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric
    • H01G7/023—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric of macromolecular compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/35—Respirators and register filters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/39—Electrets separator

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Filtering Materials (AREA)
ZA889213A 1988-01-25 1988-12-08 Electret filter made of fibers containing polypropylene and poly(4-menthul-1-pentene) ZA889213B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/147,989 US4874399A (en) 1988-01-25 1988-01-25 Electret filter made of fibers containing polypropylene and poly(4-methyl-1-pentene)

Publications (1)

Publication Number Publication Date
ZA889213B true ZA889213B (en) 1990-08-29

Family

ID=22523762

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA889213A ZA889213B (en) 1988-01-25 1988-12-08 Electret filter made of fibers containing polypropylene and poly(4-menthul-1-pentene)

Country Status (11)

Country Link
US (1) US4874399A (xx)
EP (1) EP0325854B1 (xx)
JP (1) JP2634224B2 (xx)
KR (1) KR970003059B1 (xx)
AU (1) AU608926B2 (xx)
BR (1) BR8900286A (xx)
CA (1) CA1323584C (xx)
DE (1) DE3880472T2 (xx)
ES (1) ES2039653T3 (xx)
MX (1) MX165402B (xx)
ZA (1) ZA889213B (xx)

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CN109715252B (zh) 2016-09-16 2021-10-19 3M创新有限公司 呼气阀和包括呼气阀的呼吸器
US11077394B2 (en) 2017-02-21 2021-08-03 Hollingsworth & Vose Company Electret-containing filter media
US10814261B2 (en) 2017-02-21 2020-10-27 Hollingsworth & Vose Company Electret-containing filter media
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KR20220024679A (ko) * 2019-06-28 2022-03-03 쓰리엠 이노베이티브 프로퍼티즈 캄파니 코어-시스 섬유, 부직 섬유질 웨브, 및 이를 포함하는 호흡기
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Also Published As

Publication number Publication date
EP0325854A1 (en) 1989-08-02
DE3880472T2 (de) 1993-10-21
KR970003059B1 (ko) 1997-03-14
JPH01224020A (ja) 1989-09-07
CA1323584C (en) 1993-10-26
AU2681588A (en) 1989-07-27
AU608926B2 (en) 1991-04-18
BR8900286A (pt) 1989-09-19
ES2039653T3 (es) 1993-10-01
JP2634224B2 (ja) 1997-07-23
DE3880472D1 (de) 1993-05-27
KR890011620A (ko) 1989-08-21
US4874399A (en) 1989-10-17
MX165402B (es) 1992-11-10
EP0325854B1 (en) 1993-04-21

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