Abstract: Disclosed herein are polycarbonate fibers and fibrous substrates, such as papers, containing such fibers. The polycarbonate fibers are produced from a polymeric composition comprising a cross-linkable polycarbonate containing endgroups derived from a monofunctional benzophenone or containing repeating units derived from a difunctional benzophenone. The polycarbonate fibers can be combined with other fibers to form the fibrous substrate. Upon exposure to ultraviolet light, crosslinking of the polycarbonate fibers will occur, improving various properties of the fibrous substrate.

Abstract: Disclosed herein are polycarbonate fibers and fibrous substrates, such as papers, containing such fibers. The polycarbonate fibers are produced from a polymeric composition comprising a cross-linkable polycarbonate containing endgroups derived from a monofunctional benzophenone or containing repeating units derived from a difunctional benzophenone. The polycarbonate fibers can be combined with other fibers to form the fibrous substrate. Upon exposure to ultraviolet light, crosslinking of the polycarbonate fibers will occur, improving various properties of the fibrous substrate.

Abstract: Fibrous substrates containing polyetherimides and other synthetic fibers are disclosed, along with methods of preparing electrical insulation paper and articles comprising the fibrous substrates.

Abstract: Fibrous substrates containing polyetherimides and other synthetic fibers are disclosed, along with methods of preparing electrical insulation paper and articles comprising the fibrous substrates.

Abstract: A consolidated fibrous mat comprises 20 to 50 weight percent of reinforcing fibers; and a continuous phase connecting the reinforcing fibers, comprising 50 to 70 weight percent of a polymer having a melt temperature at least 20° C. lower than the reinforcing fibers, and 5 to 10 weight percent of a binder having a melt temperature lower than the polymer; wherein the weight percent of each of the reinforcing fibers, the polymer, and the binder is based on the combined total weight of the reinforcing fibers, the polymer, and the binder.

Abstract: A uniaxially-stretched, extruded film comprising a polyetherimide and less than 5 weight percent of fluorine, wherein the extruded film has at least one wrinkle-free region having a first surface and a second surface, the at least one extruded wrinkle-free region comprising: an extruded thickness of more than 0 and less than 13 micrometers, and a variation of the thickness of the film of +/?10% of the thickness of the film, and a surface roughness average that is less than +/?3% of the average thickness of the film as measured by optional profilometery; and further wherein the film has a dielectric constant at 1 kHz and room temperature of at least 2.7; a dissipation factor at 1 kHz and room temperature of 1% or less; and a breakdown strength of at least 300 Volts/micrometer.

Abstract: A composition comprising at least one high Tg amorphous resin with a fibrous filler shows improved melt processability. Addition of a sulfonate salt to the compositions gives increased melt flow as well as enhanced flame retardancy in a composition which is substantially free of bromine and chlorine.