Abstract: A honeycomb system including a honeycomb layer extending in a weft plane, the honeycomb layer defining plural cells; a reinforcing layer extending in a warp plane and at least partially received within the plural cells; and a mechanical interlock adapted to connect the honeycomb layer and reinforcing layer at an intersection thereof.

Abstract: A method for preparing a high temperature melt integrity separator, the method comprising spinning a polymer by one or more of a mechanical spinning process and an electro-spinning process to produce fine fibers.

Abstract: A method comprises preparing or receiving a polyetherimide precursor solution including (i) a solvent comprising water, aliphatic alcohol, or a mixture thereof; (ii) an amine additive comprising a secondary or tertiary amine; and (iii) a polyetherimide precursor dissolved and dissociated in the solvent. The method further comprises at least partially coating or impregnating one or more reinforcement structures with the polyetherimide precursor solution and polymerizing the one or more polyetherimide precursor reagents to form a polyetherimide matrix such that the one or more reinforcement structures are at least partially embedded in the polyetherimide matrix to provide a composite article.

Abstract: A method for preparing a high temperature melt integrity separator, the method comprising spinning a polymer by one or more of a mechanical spinning process and an electro-spinning process to produce fine fibers.

Abstract: A polymer laminate and a method for manufacturing a polymer laminate are disclosed. The polymer laminate includes a first layer having a first surface and a second surface. The first layer includes a first non-porous polymer material. The polymer laminate also includes a second layer on the first surface of the first layer. The second layer includes a first porous polymer material defining a first plurality of pores, and the first non-porous polymer material located within the first plurality of pores.

Abstract: A structure includes a thermoplastic foam body having first and second major surfaces, and channels extending partially or fully through the foam body and terminating at one or both major surfaces. The surfaces of some or all of the channels are reinforced, providing the structure with increased compressive strength. The structure, which can include a skin on either or both of the major surfaces, is useful for forming aviation interior components, including aviation overhead containers, aviation interior wall panels, and aviation trays.

Abstract: A system comprises a build area, a precursor feed system to feed polyimide precursor to the build area, and a laser system comprising a laser device to emit a focused energy beam onto the build area, and a laser actuator to aim the focused energy onto selected target locations of the build area in order to selectively initiate polymerization of at least a portion of the polyimide precursor into a structure including polyimide. A method comprises feeding a polyimide precursor to a build area and selectively directing a focused energy beam to the build area to selectively initiate polymerization of at least a portion of the polyimide precursor into a structure including polyimide.

Abstract: A structure includes a thermoplastic foam body having first and second major surfaces, and channels extending partially or fully through the foam body and terminating at one or both major surfaces. The surfaces of some or all of the channels are reinforced, providing the structure with increased compressive strength. The structure, which can include a skin on either or both of the major surfaces, is useful for forming aviation interior components, including aviation overhead containers, aviation interior wall panels, and aviation trays.

Abstract: A fibrous mat having high modulus reinforcing fibers can be used to make a corrugated paper. The corrugated paper can be used to make a honeycomb paper. Methods of making the honeycomb paper are discussed as well.

Abstract: A system comprises an extrusion head to selectively extrude a bead of a precursor solution onto a target road on a substrate within a build area, the precursor solution comprising a polyimide precursor compound in a solvent, an actuator coupled to the extrusion head to move the extrusion head, a control system coupled to the actuator to control the extrusion head along the target road and selectively dispense the precursor solution to the extrusion head, and an environmental system configured to accommodate the target road during fabrication, the environmental system configured to expose the dispensed precursor solution to a temperature selected to evaporate solvent from the solution to initiate polymerization of the polyimide precursor compound to form at least a portion of a polyimide part.

Abstract: One embodiment relates to an, article and a method for producing an article including a plurality of substrates, and an adhesive bonded between at least two of the plurality of substrates. The adhesive can include a polycarbonate copolymer that includes reacted resorcinol, siloxane, and bisphenol-A. Another embodiment relates to an article having a first polyimide substrate, a second polyimide substrate, and an adhesive bonded between the first substrate and the second substrate. The article can have a 2 minute integrated heat release rate of less than or equal to 65 kilowatt-minutes per square meter (kW?min/m2) and a peak heat release rate of less than 65 kilowatts per square meter (kW/m2) as measured using the method of FAR F25.4, in accordance with Federal Aviation Regulation FAR 25.853(d).

Abstract: A method for preparing a high temperature melt integrity separator, the method comprising spinning a polymer by one or more of a mechanical spinning process and an electro-spinning process to produce fine fibers.

Abstract: A method for preparing a high temperature melt integrity separator, the method comprising spinning a polymer by one or more of a mechanical spinning process and an electro-spinning process to produce fine fibers.

Abstract: A composition for the manufacture of a porous, compressible article, the composition comprising a combination of: a plurality of reinforcing fibers; a plurality of thermoplastic fibers; optionally a plurality of polymeric binder fibers; and continuous spaced carrier fibers; wherein the polymeric binder fibers have a melting point lower than the thermoplastic fibers; methods for forming the porous, compressible article; and articles containing the porous, compressible article. An article comprising a thermoformed composite is also disclosed, wherein the composite is not supported by a scrim layer and the composite exhibits improved conformation to fine mold details to which the scrim layer could not accurately conform.

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 composition for the manufacture of a porous, compressible article, the composition comprising a combination of: a plurality of reinforcing fibers; a plurality of polyimide fibers; and a plurality of polymeric binder fibers; wherein the polymeric binder fibers have a melting point lower than the polyimide fibers; methods for forming the porous, compressible article; and articles containing the porous, compressible article. An article comprising a thermoformed dual matrix composite is also disclosed, wherein the composite exhibits a time to peak release, as measured by FAR 25.853 (OSU test), a 2 minute total heat release, as measured by FAR 25.853 (OSU test), and an NBS optical smoke density of less than 200 at 4 minutes, determined in accordance with ASTM E-662 (FAR/JAR 25.853).

Abstract: A transformer paper comprising polyetherimide fibers is disclosed, along with a method of making the transformer paper and articles.

Abstract: A fibrous substrate comprising a consolidated product of a fiber composition is provided comprising polyimide fibers; fibers selected from aromatic polyamide fibrids or polycarbonate fibers; aromatic polyamide fibers. A process of preparing a fibrous substrate is disclosed, comprising forming a layer from a slurry comprising a suspension solvent; and fiber composition comprising a combination of polyimide fibers; aromatic polyamide fibers; aromatic polyamide fibrids; each based on the total weight of the fibers in the fiber composition; dewatering the layer; and consolidating the layer to form the fibrous substrate; wherein a layer of polyimide fiber aromatic polyamide fibrid is applied to each surface of the fibrous substrate either before or after said consolidating step, and the substrate and polyimide layers are together subjected to a consolidating step. In another embodiment, articles comprising the above fibrous substrates are provided.

Abstract: A method for preparing a high temperature melt integrity separator, the method comprising spinning a polymer by one or more of a mechanical spinning process and an electro-spinning process to produce fine fibers.

Abstract: A transformer paper comprising polyetherimide fibers is disclosed, along with a method of making the transformer paper and articles.