Coil and electrical strip or electrical sheet
Assigneevoestalpine Stahl GmbH
InventorsRonald Fluch, Roman Tiefenthaller
Life of this patent
Estimating the term…
Abstract
A coil and an electrical strip or electrical sheet with at least one heat-hardening hotmelt varnish, namely a baked enamel layer, provided on its flat sides, which has an epoxy resin base, at least one hardener, and at least one filler, are disclosed. In order to achieve a high storage stability and long-term temperature stability, the proposal is made for the filler of the baked enamel layer to have a metal carbonate, sulfate, sulfide, silicate, or phosphate or any mix of a plurality of these.
Claims15
An electrical strip or electrical sheet, comprising:
- at least one heat-hardening hotmelt varnish, namely a baked enamel layer, provided on flat sides of the electrical strip or electrical sheet, which has an epoxy resin base, at least one hardener, and at least one filler, wherein the at least one filler of the baked enamel layer contains at least one of the group consisting of:
- a metal carbonate, sulfate, sulfide, silicate, phosphate and any combination thereof.
A method of increasing dimensional stability of a coil, comprising:
- using at least one of the group consisting of:
- a metal carbonate, sulfate, sulfide, silicate, phosphate, and any combination thereof as a filler in a heat-hardening hotmelt varnish, namely a baked enamel layer, with an epoxy resin base and a hardener to coat an electrical strip or electrical sheet on at least one of its flat sides;
- and
- forming the coil from the coated electrical strip or electrical sheet.
A method of increasing long-term temperature resistance of a laminated core;
- comprising:
- using at least one of the group consisting of:
- a metal carbonate, sulfate, sulfide, silicate, phosphate, and any combination thereof as a filler in a heat-hardening hotmelt varnish, namely a baked enamel layer, with an epoxy resin base and a hardener to coat an electrical strip or electrical sheet on at least one of its flat sides;
- and
- forming the laminated core from the coated electrical strip or electrical sheet.
Dependencies are inferred from the claim text.