WO1984002424A2 - Method and apparatus for the production of electret materials - Google Patents
Method and apparatus for the production of electret materials Download PDFInfo
- Publication number
- WO1984002424A2 WO1984002424A2 PCT/US1983/001906 US8301906W WO8402424A2 WO 1984002424 A2 WO1984002424 A2 WO 1984002424A2 US 8301906 W US8301906 W US 8301906W WO 8402424 A2 WO8402424 A2 WO 8402424A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- conductor elements
- dielectric material
- along
- electret
- electrical
- Prior art date
Links
- 239000000463 material Substances 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 2
- 239000004020 conductor Substances 0.000 abstract 6
- 239000003989 dielectric material Substances 0.000 abstract 5
- 230000005684 electric field Effects 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
An electret material is formed by the method which includes the step of passing a pair of electrical conductor elements (32) along one surface of a dielectric material (20) heated to a predetermined temperature. The conductor elements (32) are supported between a pair of support members (26) driven in a direction to move the conductor elements (32) along the surface of the dielectric material (20) for applying an electrical field to the material. An optical lens (30) focuses the radiant energy generated by a heating element positioned adjacent the surface of the dielectric material (20) and movable with the conductor elements (32) to heat the area of the dielectric material (20) located between the conductor elements (32) enabling the material to be polarized by the electrical field, thereby producing an electret. The advantage of moving the electrical conductors (32) along one surface of the dielectric material instead of along the opposite surfaces thereof is that the electret can be produced at relatively low cost, using relatively low voltages, and at a relatively high rate of speed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8484900236T DE3368340D1 (en) | 1982-12-16 | 1983-12-02 | Method and apparatus for the production of electret materials |
| DE1984900236 DE128200T1 (en) | 1982-12-16 | 1983-12-02 | METHOD AND DEVICE FOR THE PRODUCTION OF ELECTRICITY. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/450,311 US4512940A (en) | 1982-12-16 | 1982-12-16 | Method and apparatus for the production of electret material |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO1984002424A2 true WO1984002424A2 (en) | 1984-06-21 |
| WO1984002424A1 WO1984002424A1 (en) | 1984-06-21 |
| WO1984002424A3 WO1984002424A3 (en) | 1984-08-02 |
Family
ID=
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0022630A1 (en) * | 1979-07-06 | 1981-01-21 | The Post Office | Method and apparatus for implanting a charge in an electret foil |
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0022630A1 (en) * | 1979-07-06 | 1981-01-21 | The Post Office | Method and apparatus for implanting a charge in an electret foil |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3368340D1 (en) | 1987-01-22 |
| EP0128200B1 (en) | 1986-12-10 |
| US4512940A (en) | 1985-04-23 |
| WO1984002424A3 (en) | 1984-08-02 |
| CA1216970A (en) | 1987-01-20 |
| EP0128200A1 (en) | 1984-12-19 |
| JPS60500155A (en) | 1985-01-31 |
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