Methods for fabricating high-temperature composite structures (e.g., structures comprising carbon-carbon composite materials or ceramic composite matrix (CMC) materials and configured for use at temperature at or exceeding about 2000° F. (1093° C.)) include forming precursor structures by additive manufacturing (“AM”) (e.g., “3D printing”). The precursor structures are exposed to high temperatures to pyrolyze a precursor matric material of the initial 3D printed structure. A liquid resin is used to impregnate the pyrolyzed structure, to densify the structure into a near-net final shape. Use of expensive and time-consuming molds and post-processing machining may be avoided. Large, unitary, integrally formed parts conducive for use in high-temperature environments may be formed using the methods of the disclosure.

A plastic preform apparatus is disclosed that is suitable for forming a bottle. The plastic preform apparatus features a neck portion adapted to engage a closure and includes a support ring at its lowermost point. The neck portion features a first wall thickness, and an elongated body portion including a cylindrical wall portion and an end cap. An upper segment of the body portion adjacent to the support ring features a second wall thickness substantially similar to the first wall thickness and less than a third wall thickness in a lower segment of the body portion.

The invention relates to a process for manufacturing a plastic-metal hybrid part by plastic overmolding on a metal surface via nano-molding technology (NMT), wherein the moldable plastic material is a polymer composition comprising thermoplastic polyamide, or a thermoplastic polyester, or a blend thereof, and boron silicon glass fibers. The invention also relates to a plastic-metal hybrid part, obtainable by said process, wherein a metal part is overmolded by a polymer composition comprising thermoplastic polyamide, or a thermoplastic polyester, or a blend thereof, and boron silicon glass fibers.

A method for producing a foam-molded product by using a plasticizing cylinder, includes: plasticizing and melting the thermoplastic resin to provide the molten resin in a plasticization zone of the plasticizing cylinder; introducing a pressurized fluid containing the physical foaming agent at a fixed pressure into a starvation zone of the plasticizing cylinder to retain the starvation zone at the fixed pressure; allowing the molten resin to be in the starved state in the starvation zone; bringing the molten resin in contact with the pressurized fluid containing the physical foaming agent at the fixed pressure, in the starvation zone in a state in which the starvation zone is retained at the fixed pressure; and molding the molten resin having been brought in contact with the pressurized fluid containing the physical foaming agent into the foam-molded product.

A three-dimensional object comprises stacked substrate layers infiltrated by a hardened material comprising engineered powder that is transformed into a substance that flows and subsequently hardens into the hardened material in a spatial pattern that infiltrates positive regions, and does not infiltrate negative regions, in the substrate layers. The powder may be emulsion aggregation powder, chemically-produced toner powder, or a combination. It may be a thermoplastic or thermosettable polymer and may include nylon, elastomers, polyolefins, polyethylene, polyether ether ketone, polyimide, polyetherimide, polyphenylene sulfide, polystyrene, polypropylene, polymethyl methacrylate, and polyaryletherketone, or a combination. The powder particles may have a pre-specified controlled shape and/or a non-homogenous composition. Surface treatments and/or additives may be used to control powder flow and charge distribution. Each substrate layer may be a sheet-like structure comprising fibers held together by binder. The binder may include sodium silicate.

Provided are a composite structure that is formed by joining a metal member and a molded article of a polyarylene sulfide resin composition and is more excellent in terms of joint strength and heat cycle resistance and a producing method therefor. More specifically, provided are a composite structure formed by joining a surface-roughened metal member and a PPS member, in which a number average value of developed area ratios (Sdr) of an interface measured at five random points on a surface of the surface-roughened metal member using a confocal microscope based on ISO 25178 is 5 [%] or more, and a melt viscosity of a PPS resin is 15 to 500 [Pa.Math.s], and a producing method therefor.

The present disclosure relates to a spinneret for producing hollow fiber membranes in a phase inversion process.

A method of processing a water-dispersible, polymer-based material in a bath of a water-based solution includes providing a molten water-dispersible polymer material having monovalent cations. The water-dispersible polymer is introduced into a water bath comprising multivalent salt dissociated in the water bath into multivalent cations and anions. The water-dispersible polymer is retained within the water bath with the dissociated multivalent cations to quench the water-dispersible, polymer-based material while the monovalent cations proximate a surface of the water-dispersible polymer are exchanged with multivalent cations to form a barrier that temporarily resists dispersion of the water-dispersible, polymer-based material within the water bath. The method includes removing the water-dispersible polymer from water bath after the exchange step.

The present invention relates to a process for producing a shaped body by selective laser sintering of a sinter powder (SP). The sinter powder (SP) comprises at least one semicrystalline polyamide, at least one nylon-6I/6T and at least one polyaryl ether. The present invention further relates to a shaped body obtainable by the process of the invention and to the use of a polyaryl ether in a sinter powder (SP) for broadening the sintering window (W.sub.SP) of the sinter powder (SP).

A fiber-reinforced plastic substrate is described in which a plurality of resins having different properties are firmly compounded and that includes components [A], [B], and [C]: [A] reinforcing fibers; [B] thermoplastic resin (b); and [C] thermoplastic resin (c),
wherein the component [A] is arranged in one direction, in the fiber-reinforced plastic substrate, a resin area including the component [B] and a resin area including the component [C] are present, the resin area including the component [B] is present on a surface of one side of the fiber-reinforced plastic substrate, and a distance Ra.sub.(bc) between Hansen solubility parameters of the component [B] and the component [C] satisfies formula (1):
Ra.sub.(bc)={4(DBDC).sup.2+(PBPC).sup.2+(HBHC).sup.2}.sup.1/28
wherein Ra.sub.(bc), DB, DC, PB, PC, HB and HC are as defined.