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US 9,754,701 B2Granted
Electrical insulation material
Assignee3M Innovative Properties Company
InventorsRobert H. Turpin, David S. Stankes, Martin H. Fox, Mitchell T. Huang
Life of this patent
Estimating the term…
Abstract
Provided is an article containing non-cellulosic nonwoven fabric layer between two non-cellulosic nonwoven paper layers wherein one or both of the nonwoven paper and nonwoven fabric are electrically insulating. At least some embodiments are flame retardant.
Claims10
An article comprising:
- a non-cellulosic nonwoven fabric layer having first and second opposing major surfaces and having a non-cellulosic nonwoven paper layer attached to each major surface of the nonwoven fabric layer,
- wherein one or both of the nonwoven paper and nonwoven fabric are electrically insulating,
- wherein the nonwoven fabric layer comprises para-aramid staple fibers having a length of greater than or equal to one inch and binder fibers that soften and flow to bond with the staple fibers and wherein the nonwoven fabric layer has a basis weight of less than 30 g/m2,
- wherein at least one of the nonwoven paper layers is directly fused to the nonwoven fabric layer by the binder fibers in the nonwoven fabric, and
- wherein when the thickness of the article is between about 5 mil and about 20 mil, the tensile strength in the machine direction of the article is greater than about 60 pounds per inch width.
2 more elements
Dependencies are inferred from the claim text.