Fabric (woven – knitted – or nonwoven textile or cloth – etc.) – Nonwoven fabric – Including strand or fiber material which is of specific...
Reexamination Certificate
2005-01-04
2005-01-04
Dye, Rena (Department: 1774)
Fabric (woven, knitted, or nonwoven textile or cloth, etc.)
Nonwoven fabric
Including strand or fiber material which is of specific...
C428S221000, C428S292100, C428S359000, C428S395000, C162S141000, C162S157100, C162S157300, C162S203000, C162S207000, C442S336000, C442S337000, C442S409000
Reexamination Certificate
active
06838401
ABSTRACT:
A heat-resistant fiber paper sheet which is formed from staple fibers made from a heat-resistant organic polymer, undrawn or low ratio drawn para-aromatic polyamide staple fibers, and an organic resin binder and/or fibrids comprising a heat-resistant organic polymer as main components, wherein the amount of said staple fibers is 45 to 97 percent by weight based on the total amount of said heat-resistant fiber paper sheet; the total amount of said organic resin binder and/or said fibrids is 3 to 55 percent by weight based on the total amount of said heat-resistant fiber paper sheet; and said organic resin binder is cured, and/or said undrawn or low ratio drawn para-aromatic polyamide staple fibers and said fibrids are partially softened, deformed and/or melted to exhibit the actions of binders. The obtained heat-resistant fiber paper sheet has excellent heat resistance, excellent heat dimensional stability, excellent plybond strength, an excellent electric insulating property in a high humidity, and the like, has good resin impregnability in spite of having a high bulk density, and is especially suitable for use as a substrate for electric insulating materials or as a substrate for laminates used for electric circuits.
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Ishihara Shigeru
Matsui Michikage
Murayama Sadamitsu
Wada Masanori
Dye Rena
Gray J. M.
Sughrue & Mion, PLLC
Teijin Limited
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