John P Albert

US Patent:

20120085567, Apr 12, 2012

Filed:

Jun 3, 2010

Appl. No.:

13/375879

Inventors:

Timothy S. Lintz - Waterford NY, US
John D. Albert - Pennsburg PA, US
Donald R. Mcgivern - Latham NY, US
Eric T. Pompey - Green Island NY, US

Assignee:

LYDALL, INC. - MANCHESTER CT

International Classification:

H01B 3/30
D21H 25/00
B31F 1/12
D21H 13/16

US Classification:

174110SR, 1621573, 162111

Abstract:

Electrical insulation material comprising a fiber component, a binder element, and a dielectric additive and having a dielectric strength measured in air in the range of from about 8.9 MV/m (225 V/mil) to about 15.7 MV/m (325 V/mil), a dielectric strength measured in oil of greater than about 23.6 MV/m (600 V/mil), and a continuous use temperature of from about −30 C (−22 F) to about 220 C (428 F). A method of making electrical insulation material, comprising preparing an aqueous slurry comprising a fiber component, forming the slurry into a sheet, saturating the sheet with a saturant, wherein the saturant comprises a binder and a dielectric additive, and drying the saturated sheet. A method comprising preparing an aqueous slurry comprising a fibrillated acrylic fiber, dilution hydroforming the slurry into a sheet, saturating the sheet with a saturant, wherein the saturant comprises a carboxylated styrene-acrylate copolymer and a fluoropolymer, drying the sheet, and providing the sheet for use as insulation on an electrical conductor.