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: A process of forming a non-woven web including spinning continuous polymeric filaments including one selected from a poly(phenylene ether) component, a poly(phenylene ether)-polysiloxane block copolymer, and combinations thereof. The filaments can have a length to diameter ratio that is more than 1,000,000, and a diameter ranging from 50 nanometers to 5 microns. The spinning can include passing a polymer through a spinneret having a plurality of orifices in a non-electrospinning environment. The process can further include chopping the plurality of continuous filaments and obtaining a plurality of chopped nano-fibers and forming the nano-fibers into a nonwoven web. The spinning can be conducted at a rate of at least 300 grams/hour/spinneret.

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: A process of forming a non-woven web including spinning a plurality of continuous polymeric filaments including a polyetherimide component selected from polyetherimide homopolymers, polyetherimide co-polymers, aromatic polyester homopolymers, aromatic polyester copolymers, and combinations thereof at a rate of at least 300 grams/hour/spinneret. The continuous filaments have a diameter ranging from 50 nanometer to 5 microns, preferably 50 nanometers to 2 microns.

Abstract: A process of forming a non-woven web including spinning a plurality of continuous polymeric filaments including a polycarbonate homopolymer component, a polycarbonate copolymer component, and combinations thereof at a rate of at least 300 grams/hour/spinneret.

Abstract: A process of forming a non-woven web including spinning continuous polymeric filaments including one selected from a poly(phenylene ether) component, a poly(phenylene ether)-polysiloxane block copolymer, and combinations thereof. The filaments can have a length to diameter ratio that is more than 1,000,000, and a diameter ranging from 50 nanometers to 5 microns. The spinning can include passing a polymer through a spinneret having a plurality of orifices in a non-electrospinning environment. The process can further include chopping the plurality of continuous filaments and obtaining a plurality of chopped nano-fibers and forming the nano-fibers into a nonwoven web. The spinning can be conducted at a rate of at least 300 grams/hour/spinneret.