Fibrous nonwoven mats containing polyethermid fibers
AssigneeJohns Manville
InventorAlan Michael Jaffee
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Abstract
Fibrous nonwoven mats comprising polyetherimid fibers and a binder comprising a resin and an adhesion promoter, and method of making the mat are disclosed. These mats have several uses and are particularly suited as facer mats for fiber reinforced thermoplastic thermoformable materials. When used as a facer, the mat bonds to the thermoformable material and provides a resin rich outer layer and facilitates bonding to a decorative cover.
Claims20
A nonwoven fiber mat comprising polyetherimid fibers bonded together at the locations where the fibers cross each other with about 15-35 weight percent of a resinous binder comprising melamine formaldehyde resin and urethane resin, based on the dry weight of the mat.
A mat comprising fibers, a major portion of the fibers being polyetherimid fibers, and about 15-35 wt. percent of a binder comprising melamine formaldehyde resin, urethane resin and an adhesion promoter selected from the group consisting of primary amines, amino silanes, n-methylpyrillidone, a water soluble polyester, novolac resin, and phenoxy resin.
Dependencies are inferred from the claim text.