CA1199768A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Foil manufacture
Assignee: Isovolta AG
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Filing: 1983-07-27
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Granted: 1986-01-28
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Expires: 2003-07-27
Abstract
Abstract ABSTRACT OF THE DISCLOSURE A process for the production of an electrical insulating foil com-prising substantially a thin-layer of electrical grade mica powder and a hardenable synthetic resin comprising forming a paste of electrical grade mica and a hardenable synthetic resin and optional fillers and/or reinforcement materials, forming a strand of said paste and subjecting the pasty strand to a calender or ribbon press to reduce the strand thickness into a thin-layer.
Inventors
- 👤 Gottfried Deutschmann
- 👤 Helmut Gsellmann
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-01 11:46
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/04; B; B29; B29C; B29C48/00; B29C48/001; B29C48/022; H01B19/00; B29C48/0018; B29C48/0021; B29C48/03; B29C48/04; B29C48/07; B29C48/08; B29C48/15; B29C48/16; B29C48/18; B29C48/21; B29K; B29K2105/00; B29K2105/06; B29K2105/12; B29L; B29L2031/00; B29L2031/34; B29L2031/3412
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
93 words
A process for the production of an electrical insulating foil comprising substantially a thin-layer of electrical grade mica powder and a hardenable synthetic resin with a thickness of 0.1 to 0.5 mm comprising the steps of forming a paste of electrical grade mica powder and a hardenable substantially solvent free synthetic resin and optional fillers and/or reinforcement material, forming a strand of said paste and evenly distributing the pasty strand over the entrance of a calender or a ribbon press to reduce the strand thickness into a thin-layer 0.1 to 0.5 mm thick.
Claim 2
Dependent Claim
93 words
A process for the production of an electrical insulating foil comprising substantially a thin-layer of electrical grade mica powder and a hardenable synthetic resin with a thickness of 0.1 to 0.5 mm comprising the steps of forming a paste of electrical grade mica powder and a hardenable substantially solvent free synthetic resin and optional fillers and/or reinforcement material, forming a strand of said paste and evenly distributing the pasty strand over the entrance of a calender or a ribbon press to reduce the strand thickness into a thin-layer 0.1 to 0.5 mm thick.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein the mica powder is based on muscovite or phlogopite.
Claim 4
Dependent Claim
17 words
The process of claim 1 wherein the paste contains 35 to 70% by weight of mica powder.
Claim 5
Dependent Claim
17 words
The process of claim 1 wherein the paste contains 45 to 65% by weight of mica powder.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein the paste contains up to 20% by weight of fillers and/or reinforcing materials.
Claim 7
Dependent Claim
13 words
The process of claim 1 wherein the resin is in the liquid state.
Claim 8
Dependent Claim
12 words
The process of claim 1 wherein the resin is an epoxy resin.
Claim 9
Dependent Claim
12 words
The process of claim 1 wherein the resin is a polyester resin.
Claim 10
Dependent Claim
12 words
The process of claim 1 wherein the resin is a silicone resin.
Claim 11
Dependent Claim
25 words
The process of claim 1 wherein the pasty strand is between two webs of sheet material while being calendered or pressed by a ribbon press.
Claim 12
Dependent Claim
22 words
The process of claim 10 wherein the pasty strand is permanently bonded to at least one of the webs of sheet material.
Claim 13
Dependent Claim
31 words
The process of claim 10 wherein a fiber fabric web is provided between the strand and web of sheet material and the fabric web and foil layer are permanently bonded together.
References Cited (Backward Citations)
No citation records indexed.
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