Disclosed are preforms which incorporate improvements in the region of the neck and upper segment of the body to allow the production of lightweight containers, such as bottles suitable for containing water or other beverages. In accordance with certain embodiments, the improvements include a thinner neck finish area than conventional bottles, where the thinner area is extended into the upper segment of the body portion below the support ring. Reducing the thickness in these areas of the bottle allows for less resin to be used in forming the preform and bottle.

The invention is directed to a composite structure in which a metal member having a roughened surface and a resin member are joined in a state in which at least a portion of the roughened surface is included. The resin member is made of a molded article obtained by melt-molding a polyarylene sulfide resin composition containing a polyarylene sulfide resin. In the roughened surface, a cumulative pore volume of a pore diameter in a range of 0.1 m to 20 m is in a range of 0.5 nL/mm.sup.2 or more and 5 nL/mm.sup.2 or less measured by mercury porosimetry. According to the invention, it is possible to provide a composite structure that is obtained by joining a metal member and a molded article made of polyarylene sulfide resin composition and is more excellent in joining strength, heat cycle resistance, and sealing properties, and a method for producing the composite structure.

A resin composition with high heat resistance, melt formability, and secondary processability is provided. A resin composition containing: a poly(aryl ether ketone) resin (A); and a poly(ether imide sulfone) resin (B), wherein the poly(aryl ether ketone) resin (A) and the poly(ether imide sulfone) resin (B) are compatibly mixed. The poly(aryl ether ketone) resin (A) is preferably a poly(ether ketone ketone) resin with a repeating unit (a-1) represented by the following formula (1A) and a repeating unit (a-2) represented by the following formula (2A), and the resin composition has one glass transition temperature. ##STR00001##

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) with a filament drawn from a spool. 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 metal memberpolyarylene sulfide resin member complex superior in airtightness between the metal member and the polyarylene sulfide (PAS) resin member and a production method therefor, in which the complex comprises a metal member and a PAS member combined together into a one-piece shaped article by injection molding and satisfies conditions 1) and 2) as described, and the PAS resin member contains a PAS resin and a modified ethylene copolymer.

A method of preparing a reinforced separator comprising the steps of:providing a porous support (6) on a pre-wetted casting drum (23);applying a dope solution (3) including a polymer resin and hydrophilic inorganic particles on a side of the porous support other than the side of the porous support in contact with the pre-wetted casting drum;performing phase inversion (9, 1) of the applied polymer solution thereby obtaining a reinforced separator; andremoving the reinforced separator (7) from the casting drum; wherein the casting drum is pre-wetted with a non-solvent for the polymer resin.

A process can be used for producing (rigid) particle foams from polymer compositions containing at least one polymer having a glass transition temperature according to ISO 11357-2 of at least 180 C. with an underwater pelletization system.