FR2467474A1 - Procede de fabrication d'electrets - Google Patents
Procede de fabrication d'electrets Download PDFInfo
- Publication number
- FR2467474A1 FR2467474A1 FR8021699A FR8021699A FR2467474A1 FR 2467474 A1 FR2467474 A1 FR 2467474A1 FR 8021699 A FR8021699 A FR 8021699A FR 8021699 A FR8021699 A FR 8021699A FR 2467474 A1 FR2467474 A1 FR 2467474A1
- Authority
- FR
- France
- Prior art keywords
- sheet
- temperature
- charge
- positively charged
- polymer
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000000137 annealing Methods 0.000 claims abstract description 9
- 229920000642 polymer Polymers 0.000 claims abstract description 9
- 229920001577 copolymer Polymers 0.000 claims abstract description 4
- 229920002313 fluoropolymer Polymers 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 27
- 238000002425 crystallisation Methods 0.000 claims description 5
- 230000008025 crystallization Effects 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 239000000835 fiber Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 238000009997 thermal pre-treatment Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 229920006356 Teflon™ FEP Polymers 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 1
- 238000010849 ion bombardment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
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
- B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
- B01D39/083—Filter cloth, i.e. woven, knitted or interlaced material of organic 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
- B01D39/10—Filter screens essentially made of metal
-
- 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
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0414—Surface modifiers, e.g. comprising ion exchange groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0435—Electret
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
- B01D2239/0668—The layers being joined by heat or melt-bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7907539A NL7907539A (nl) | 1979-10-11 | 1979-10-11 | Werkwijze voor het vervaardigen van elektreten. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2467474A1 true FR2467474A1 (fr) | 1981-04-17 |
| FR2467474B1 FR2467474B1 (nl) | 1984-11-30 |
Family
ID=19833999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8021699A Granted FR2467474A1 (fr) | 1979-10-11 | 1980-10-10 | Procede de fabrication d'electrets |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS56100409A (nl) |
| DE (1) | DE3038381A1 (nl) |
| FR (1) | FR2467474A1 (nl) |
| GB (1) | GB2060259B (nl) |
| NL (1) | NL7907539A (nl) |
| SE (1) | SE452525B (nl) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4527218A (en) * | 1981-06-08 | 1985-07-02 | At&T Bell Laboratories | Stable positively charged Teflon electrets |
| JPS60168511A (ja) * | 1984-02-10 | 1985-09-02 | Japan Vilene Co Ltd | エレクトレツトフイルタの製造方法 |
| US5019723A (en) * | 1987-12-07 | 1991-05-28 | Controlled Release Technologies, Inc. | Self-regulated therapeutic agent delivery system and method |
| CA2037942A1 (en) * | 1990-03-12 | 1991-09-13 | Satoshi Matsuura | Process for producing an electret, a film electret, and an electret filter |
| JPH05214A (ja) * | 1990-11-30 | 1993-01-08 | Mitsui Petrochem Ind Ltd | エレクトレツトフイルター |
| AU669420B2 (en) * | 1993-03-26 | 1996-06-06 | Minnesota Mining And Manufacturing Company | Oily mist resistant electret filter media |
| JP3566477B2 (ja) * | 1996-12-26 | 2004-09-15 | 興研株式会社 | 静電フィルター |
| US6432175B1 (en) | 1998-07-02 | 2002-08-13 | 3M Innovative Properties Company | Fluorinated electret |
| JP4746291B2 (ja) * | 2004-08-05 | 2011-08-10 | オリンパス株式会社 | 静電容量型超音波振動子、及びその製造方法 |
| KR101144448B1 (ko) * | 2009-12-03 | 2012-06-14 | 현대자동차주식회사 | 정전필터제조방법 및 이를 적용한 정전필터 |
| DE102020002271B3 (de) * | 2020-04-14 | 2021-06-17 | Heinz Günther Römer | Virologische Atemschutzmaske zum Schutz vor Tröpfcheninfektionen |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1135413A (en) * | 1965-10-23 | 1968-12-04 | Philip Morris Inc | An electret and method of making the same |
| FR2108561A5 (nl) * | 1970-09-26 | 1972-05-19 | Kureha Chemical Ind Co Ltd | |
| FR2236259A1 (nl) * | 1973-07-05 | 1975-01-31 | Sony Corp |
-
1979
- 1979-10-11 NL NL7907539A patent/NL7907539A/nl not_active Application Discontinuation
-
1980
- 1980-10-09 JP JP14067580A patent/JPS56100409A/ja active Pending
- 1980-10-10 GB GB8032815A patent/GB2060259B/en not_active Expired
- 1980-10-10 SE SE8007120A patent/SE452525B/sv not_active IP Right Cessation
- 1980-10-10 FR FR8021699A patent/FR2467474A1/fr active Granted
- 1980-10-10 DE DE19803038381 patent/DE3038381A1/de not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1135413A (en) * | 1965-10-23 | 1968-12-04 | Philip Morris Inc | An electret and method of making the same |
| FR2108561A5 (nl) * | 1970-09-26 | 1972-05-19 | Kureha Chemical Ind Co Ltd | |
| FR2236259A1 (nl) * | 1973-07-05 | 1975-01-31 | Sony Corp |
Also Published As
| Publication number | Publication date |
|---|---|
| SE452525B (sv) | 1987-11-30 |
| SE8007120L (sv) | 1981-04-12 |
| NL7907539A (nl) | 1981-04-14 |
| FR2467474B1 (nl) | 1984-11-30 |
| DE3038381A1 (de) | 1981-04-23 |
| GB2060259B (en) | 1983-12-14 |
| GB2060259A (en) | 1981-04-29 |
| JPS56100409A (en) | 1981-08-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| TP | Transmission of property | ||
| ST | Notification of lapse |