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US 3,956,561 AGranted
Nonwoven electrical insulation base fabrics
AssigneeThe Kendall Company
InventorsGary C. Anderson, Loyd G. Kasbo
Life of this patent
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Abstract
Nonwoven fabrics of enhanced resistance to shrinkage, degradation, and planar instability at elevated temperatures are prepared from a major portion of aramid fibers bonded by a minor portion of polyamide fibers.
Claims3
A nonwoven fabric comprising a major portion of non-fusible aramid fibers in which both the amino groups and the carboxy groups are attached to an aromatic ring,
- bonded by a minor portion of thermoplastic polyamide fibers,
- said fabric being characterized by resistance to significant shrinkage and resistance to thermal degradation at a temperature of over 500.degree.F.
Dependencies are inferred from the claim text.