DE928842C - Process for making electrets - Google Patents
Process for making electretsInfo
- Publication number
- DE928842C DE928842C DEE7515A DEE0007515A DE928842C DE 928842 C DE928842 C DE 928842C DE E7515 A DEE7515 A DE E7515A DE E0007515 A DEE0007515 A DE E0007515A DE 928842 C DE928842 C DE 928842C
- Authority
- DE
- Germany
- Prior art keywords
- formation
- electrets
- electret
- stresses
- substance
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 title claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000011888 foil Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 239000001993 wax Substances 0.000 claims description 2
- 229920002292 Nylon 6 Polymers 0.000 claims 1
- 239000004793 Polystyrene Substances 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 238000000354 decomposition reaction Methods 0.000 claims 1
- 229930195733 hydrocarbon Natural products 0.000 claims 1
- 150000002430 hydrocarbons Chemical class 0.000 claims 1
- 229920002223 polystyrene Polymers 0.000 claims 1
- 239000005871 repellent Substances 0.000 claims 1
- 239000002904 solvent Substances 0.000 claims 1
- 230000008961 swelling Effects 0.000 claims 1
- 230000005684 electric field Effects 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 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)
- Chemical Or Physical Treatment Of Fibers (AREA)
Description
Unter einem Elektreten versteht man einen Körper, der von einem dauernden elektrischen Feld umgeben, ist. Solche Elektrete werden üblicherweise dadurch hergestellt, daß man bestimmte geschmolzene Substanzen, wie Harze, Wachse, Gläser oder Kunststoffe, in einem elektrischen Feld erstarren läßt. In der geschmolzenen Substanz sind die vorhandenen Ionen bzw. die elektrischen Dipole gut beweglich, so daß sie von dem elektrischen Feld getrennt bzw. ausgerichtet werden können. Nach dem Erstarren. können sie nur sehr langsam in ihre ungeordnete Lage zurückkehren, so daß ein permanentes elektrisches Feld zurückbleibt, das auch nach außen wirkt.An electret is a body that is permanent electric field is surrounded. Such electrets are usually made by that certain molten substances, such as resins, waxes, glasses or plastics, solidifies in an electric field. In the molten substance are those existing ions or the electrical dipoles are easily movable, so that they are of the electrical field can be separated or aligned. After solidification. they can only return to their disordered position very slowly, so that a permanent electric field remains, which also acts to the outside.
Bei dem Verfahren nach der Erfindung wird die Trennung der Ionen bzw. die Ausrichtung der Dipole in gelöstem bzw. stark gequollenem Material vorgenommen. Hierdurch wird der erhebliche technische Vorteil erzielt, daß man mit Substanzen arbeiten kann, die sich nicht unzersetzt oder ohne Zunahme ihrer elektrischen Leitfähigkeit schmelzen lassen. Weiterhin kann man unmittelbar den Polymerisationsvorgang im elektrischen Feld vor sich gehen lassen und so unmittelbar ausgerichtete Elektrete gewinnen, die sich durch besonders hohe Lagerfähigkeit auszeichnen.In the method according to the invention, the separation of the ions or the alignment of the dipoles is carried out in dissolved or heavily swollen material. This has the considerable technical advantage that you can use substances which does not decompose or increase its electrical conductivity let melt. Furthermore, you can directly the polymerization process in the electrical Let the field go in front of you and thus obtain directly aligned electrets, which are characterized by a particularly long shelf life.
Für die Durchführung des Verfahrens nach der Erfindung benutzt man die in Fig. i dargestellte Einrichtung. In dem Formierungstrog d sind die heraushebbaren Hochspannungselektroden angeordnet, die mit 1VIetallfolien b überzogen sind und zwischen denen das gelöste bzw. gequollene oder zu polymeris erende Material c sich befindet. Nach dem Herausheben lassen sich die Metallfolien b leicht von den Elektroden a trennen und bleiben als Armierung am Elektretren sitzen. Die Herstellung von Elektreten für hohe elektrische Spannung erfolgt gemäß der Erfindung nach Fig. 2 durch Aufeinanderlegen mehrerer beiderseitig mit Folien b armierter scheibenförmiger Elektrete. Dieses Verfahren setzt die zu Formierung benötigten Spannungen 'herab und erlaubtes, :die Feldverteilung in einem Hochspannungselektreten weitgehend zu beeinflussen. Man kann so z. B. an den Enden niedrige Feldstärken lokalisieren, um Sprühverluste zu vermeiden.To carry out the method according to the invention one uses the device shown in Fig. i. In the formation trough d are the ones that can be lifted out Arranged high-voltage electrodes, which are covered with 1VIetallfolien b and between which the dissolved or swollen or to be polymerized material c is is located. After being lifted out, the metal foils b can easily be removed from the electrodes a and stay on the electrics as reinforcement. The manufacture of electrets for high electrical voltage is carried out according to the invention according to FIG. 2 by laying one on top of the other several disc-shaped electrets reinforced on both sides with foils. This Procedure reduces the voltages required for formation and allows: the To largely influence the field distribution in a high-voltage electret. Man can so z. B. localize low field strengths at the ends to reduce spray losses avoid.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEE7515A DE928842C (en) | 1953-07-09 | 1953-07-09 | Process for making electrets |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEE7515A DE928842C (en) | 1953-07-09 | 1953-07-09 | Process for making electrets |
Publications (1)
Publication Number | Publication Date |
---|---|
DE928842C true DE928842C (en) | 1955-06-13 |
Family
ID=7067180
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEE7515A Expired DE928842C (en) | 1953-07-09 | 1953-07-09 | Process for making electrets |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE928842C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2603642A1 (en) * | 1975-02-03 | 1976-08-19 | Kureha Chemical Ind Co Ltd | METALIZED PLASTIC FILMS |
DE3033163A1 (en) * | 1979-09-04 | 1981-03-12 | Union Carbide Corp., 10017 New York, N.Y. | ELECTRICITY AND METHOD FOR THE PRODUCTION THEREOF. |
DE3125776A1 (en) * | 1980-06-30 | 1982-05-27 | Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa | Electret device |
-
1953
- 1953-07-09 DE DEE7515A patent/DE928842C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2603642A1 (en) * | 1975-02-03 | 1976-08-19 | Kureha Chemical Ind Co Ltd | METALIZED PLASTIC FILMS |
DE3033163A1 (en) * | 1979-09-04 | 1981-03-12 | Union Carbide Corp., 10017 New York, N.Y. | ELECTRICITY AND METHOD FOR THE PRODUCTION THEREOF. |
DE3125776A1 (en) * | 1980-06-30 | 1982-05-27 | Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa | Electret device |
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