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US 9,922,750 B2Granted
Electrical insulating paper
AssigneeTeijin Aramid B.V.
InventorsBen Rolink, Richard Visser, Frank Diedering
Life of this patent
Estimating the term…
Abstract
An electrical insulating paper having 40-80 wt % of aramid fibrid, 10-50 wt % of aramid pulp, and 10-50 wt % of aramid short-cut. The aramid pulp is para-aramid pulp with a length of 0.5-6 mm and has a Schopper Riegler value of 15-85; the aramid fibrid is para-aramid fibrid; and the aramid short-cut is para-aramid short-cut. The paper shows a high dielectric strength and tensile index. A method for manufacturing the paper and an insulated conductor that includes the paper.
Claims12
An electrical insulating paper comprising:
- 40-80 wt % of aramid fibrid,
- 10-50 wt % of aramid pulp, and
- 10-50 wt % of aramid short-cut,
- wherein the aramid of the aramid pulp consists of para-aramid and wherein the aramid pulp has a length of 0.5-6 mm and has a Schopper Riegler (SR) value of 15-85, and
- wherein the aramid fibrid has a SR value of 50-90, and/or a specific surface area (SSA) of less than 10 m2/g.
2 more elements
Dependencies are inferred from the claim text.