DEP0052215DA - Procedure for raising the dropping point of polyethylene: - Google Patents
Procedure for raising the dropping point of polyethylene:Info
- Publication number
- DEP0052215DA DEP0052215DA DEP0052215DA DE P0052215D A DEP0052215D A DE P0052215DA DE P0052215D A DEP0052215D A DE P0052215DA
- Authority
- DE
- Germany
- Prior art keywords
- polyethylene
- dropping point
- raising
- procedure
- point
- 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
- 239000004698 Polyethylene Substances 0.000 title claims description 6
- -1 polyethylene Polymers 0.000 title claims description 6
- 229920000573 polyethylene Polymers 0.000 title claims description 6
- 238000000034 method Methods 0.000 title claims description 3
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Description
Aktiengesellschaft Ostl.Stadtmauerstr. 3ΘAktiengesellschaft Ostl.Stadtmauerstr. 3Θ
Verfahre α zur ,Tro^gujgjcterhöhun.g yon Polyäthylen» Proceed to the, Tro ^ gujgjcterh öhun.g of Polyäthylen »
Niedermolekulare Polyäthylene können nach früheren Vorschlägen ζαλΤ Imprägnierung und Isolation von Wicklungen elektrischer Geräte verwendet werden, falls es gelingt ihren Tropfpunkt genügend weit über die betriebsmässig auftretende Höchsttemperatur des Geräts zu erhöhen.According to earlier proposals, low molecular weight polyethylenes can ζαλΤ impregnation and insulation of windings electrical Devices are used if it succeeds their dropping point far enough above the operationally occurring maximum temperature of the device.
Bs ist vorgeschlagen worden den Tropfpunkt von Polyäthylen durch länger andauernde Wärmebehandlung, insbesondere solcher mit steigender Temperatur zu erhöhen, doch ist dieses Verfahren etwas langwierig.It has been suggested that the drop point of polyethylene by prolonged heat treatment, especially such to increase with increasing temperature, but this process is somewhat tedious.
Erfindungsgemäss wird der Tropfpunkt durch Einwirkung stiller elektrischer Entladungen auf das gelöste oder geschmolzene Polyäthylen erhöht. Dabei erhöht sich auch der Polymerisationsgrad und die Zähigkeit. According to the invention, the dropping point is determined by the action of silent electrical discharges on the dissolved or melted Polyethylene increased. This also increases the degree of polymerization and toughness.
So kann z.B. bei Anwendung von 2500 bis 2S00 Volt das auf .150 bis 160^ erwärmte Polyäthylen schon in einer Stunde auf einen um 20^höheren Tropfpunkt gebracht werden. Die Zähigkeit erhöht sich dabei beispielsweise von 430 auf 526 cSt.Thus, for example when used from 2500 to 2S00 volts on the .150 heated to 160 ^ polyethylene already in one hour to a higher order 2 0 ^ dropping point be brought. The toughness increases from 430 to 526 cSt, for example.
1 Patentanspruch 0 Figuren.1 claim 0 figures.
Claims (1)
Family
ID=
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES8105337A1 (en) | Phosphite treatment of phosphorus acid salts and compositions produced thereby | |
| CH262419A (en) | Process for accelerating electrically charged particles and apparatus for carrying out this process. | |
| DEP0052215DA (en) | Procedure for raising the dropping point of polyethylene: | |
| DE818119C (en) | Process for raising the drop point of polyethylene | |
| GB1021405A (en) | A high tensile precipitation hardenable structural steel | |
| CH160729A (en) | Process for the manufacture of wire ropes and cables with non-circular wires of high strength and the device for practicing this process. | |
| CH310634A (en) | Process for charging electrothermal melting furnaces and a melting furnace system for carrying out the process. | |
| US1694276A (en) | Electrical condenser | |
| GB239605A (en) | Improved method of treating fibres | |
| GB1046584A (en) | Process for applying a reinforced plastic coating to a metal lamp post | |
| CH288176A (en) | Process for ozone treatment of water and equipment for carrying out this process. | |
| SU149481A1 (en) | Mikalenta | |
| US822005A (en) | Antislippage dressing for belting. | |
| DE845946C (en) | Process and device for the treatment of feed water or to prevent scale formation | |
| AT73689B (en) | Method and device for the treatment of coatings to be dried or matured by means of heat and light irradiation, such as, for example, paint coatings on leather or the like. | |
| US1798605A (en) | Woven fabric containing lead | |
| DE426388C (en) | Process for the production of phosphoric anhydride | |
| DE385211C (en) | Process for making waterproof fuses | |
| SU116001A1 (en) | Method of forming fiber from acrylonitrile polymer or copolymer | |
| AT305122B (en) | Firing range and insulated wire for use in the same | |
| DE859950C (en) | Dihydropyran as a solvent for polyhydrocarbons | |
| GB325938A (en) | Process for lubricating, conditioning and laying the fly of raw cotton | |
| DE481934C (en) | Process for the production of wax wires | |
| DE526040C (en) | Device for the movable lateral connection of a metal smoke duct to a brick chimney | |
| DE359301C (en) | Process for the production of calcium phosphide |