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US 12,626,836 B2Granted
Electrical insulation paper
AssigneeAhlstrom Oyj
InventorsLucie Boiron, Thierry Mayade
Life of this patent
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Abstract
This disclosure relates to an electrical insulation paper comprising at least 25% content by weight of cellulose fibers based on the total weight of the electrical insulation paper, 8% content by weight of synthetic fibers based on the total weight of the electrical insulation paper, and a thermal stabilizer comprising nitrogen, wherein a content by weight of the nitrogen constitutes between 1% and 4% of the content by weight of the cellulose fibers.
Claims16
An electrical insulation paper comprising:
- at least 25% content by weight of cellulose fibers based on the total weight of the electrical insulation paper;
- at least 5% content by weight of synthetic fibers based on the total weight of the electrical insulation paper, the synthetic fibers comprising aliphatic polyamide fibers and/or glass fibers;
- and
- a thermal stabilizer comprising nitrogen, wherein a content by weight of the nitrogen constitutes between 1% and 4% of the content by weight of the cellulose fibers.
1 more element
A method of manufacturing an electrical insulation paper, comprising the steps of:
- providing cellulose fibers and synthetic fibers;
- manufacturing a base paper from the cellulose fibers and synthetic fibers on a paper machine, with at least 25% content by weight of the cellulose fibers based on the total weight of the electrical insulation paper, and at least 5% content by weight of the synthetic fibers based on the total weight of the electrical insulation paper, the synthetic fibers comprising aliphatic polyamide fibers and/or glass fibers;
- wherein the method further comprises adding a thermal stabilizer comprising nitrogen, wherein a content by weight of the nitrogen constitutes between 1% and 4% of the content by weight of the cellulose fibers.
Dependencies are inferred from the claim text.