A method for producing a polyamide resin composition containing a crystalline polyamide resin (A) containing a polycaproamide resin as a main component, a semi-aromatic amorphous polyamide resin (B), an inorganic reinforcing material (C), a master batch of carbon black (D), and a copper compound (E); a dispersion liquid of the copper compound (E) has a concentration of 0.04% by mass to 1.0% by mass; and the crystalline polyamide resin (A) containing a polycaproamide resin as a main component, the semi-aromatic amorphous polyamide resin (B), the master batch of carbon black (D), and the dispersion liquid of the copper compound (E) are mixed in advance, followed by charging the mixture is into a hopper part of an extruder, and charging the inorganic reinforcing material (C) into the extruder by a side feed method.

A colorant which has high heat resistance and thus causes neither discoloration nor fading even when exposed for a long period of time under long-term high-temperature conditions, and which has excellent bleed resistance and sublimation resistance and thus causes neither color migration to molds or other resin components, nor deterioration of physical properties of a thermoplastic resin added thereto. The colorant includes at least one compound represented by a specified chemical formula (1a), at least one compound represented by a specified chemical formula (1b), and/or at least one compound represented by a specified chemical formula (1c).

Provided herein are polymer films including a polyamide composition of PA6 and PA66/6. The provided films are particularly useful as packaging materials as they exhibit improved toughness, e.g., puncture and impact resistance, relative to that of conventional films that include only PA6 as a polyamide component. Also provided are methods for making the provided films, and articles that include the provided films.

Disclosed herein are a polyamide composition and a molded article made of the same with improved mechanical strength and reduced weight. The molded article may include the polyamide composition that includes high flowable polyamide and polyphthalamide and a small-diameter fiber, thereby resulting in an improvement in mechanical strength while achieving excellent surface properties and high weight reduction.

The invention relates to a thermoplastic composition having improved fluidity in the molten state, comprising at least: (a) a polyamide that has a melt viscosity greater than or equal to 50 Pa.Math.s, and (b) a non-evolutive polyamide having a melt viscosity lower than the melt viscosity of said polyamide (a), above 0.8 Pa.Math.s, and having a number-average molecular weight Mn lower than that of said polyamide (a), said composition having a melt viscosity that is stabilized at a value below the melt viscosity of said polyamide (a), said polyamide (b) having: a concentration of amine end groups (AEG) and/or of carboxyl end groups (CEG) less than or equal to 20 meq/kg, or a concentration of amine end groups (AEG) greater than or equal to 25 meq/kg; a concentration of acid end groups (CEG) greater than or equal to 25 meq/kg; and a concentration of blocked end groups (BEG) greater than or equal to 25 meq/kg.

The present invention relates to a thermoplastic resin composition, which achieves barrier properties against various types of gases, while maintaining flexibility, and a molded body comprising the same. The thermoplastic resin composition of the present invention is characterized in that it comprises an aliphatic polyamide, a semi-aromatic polyamide, and an impact modifier, wherein at least a part of the impact modifier is dispersed in the semi-aromatic polyamide, in the semi-aromatic polyamide, the molar ratio between diamine units and dicarboxylic acid units (the number of moles of diamine units/the number of moles of dicarboxylic acid units) is in the range of 0.97 to 1.02, and the mass ratio of the impact modifier to the total mass of the semi-aromatic polyamide and the impact modifier is in the range of 5% to 15%.

The invention relates to a process for preparing a biaxially oriented film, comprising the following steps: a) Melting a composition comprising at least 50 wt % with respect to the total amount of the composition of a copolyamide comprising: i. At least 75 wt % monomeric units derived from caprolactam, and further monomeric units derived from diamines X and/or diacids Y and/or aminoacids Z in a summed amount of between 0.2 to 25 wt %; or ii. At least 75 wt % monomeric units derived from hexamethylene diamine and adipic acid, and further monomeric units derived from diamines X and/or diacids Y and/or aminoacids Z in a summed amount of between 0.2 to 25 wt %; into a polymer melt; b) Casting the polymer melt through a planar die to form a film of at least one layer and subsequently quenching the film to a temperature of below Tg of the copolyamide; c) Stretching the film obtained after quenching in a direction parallel to the machine (MD-stretching) with a factor of at least 2 at a temperature of at least Tg of the copolyamide; d) Stretching the film obtained after MD stretching in a direction transversal to the machine (TD-stretching) with a factor of at least 2 at a temperature of at least Tg+10° C. of the copolyamide; e) Cooling the obtained film after TD-stretching; f) Heat setting the film obtained after cooling, at a temperature of between Tm−70° C. and Tm of the copolyamide; in which Tg and Tm of the copolyamide are determined as described by ASTM D3418-03. The invention also relates to a biaxially oriented film and food packaging obtainable by this process.

The present invention relates to fiber-plastics composites consisting of (I) at least one fiber material and (II) a plastics matrix, where the composite is characterized in that the plastics matrix is based on a two-component matrix material (IIa), where the two-component matrix material (IIa) comprises (1) a parent component comprising (A) at least one polycarbonatediol and (2) a hardener component comprising (C) at least one polyisocyanate-modified polyester with from 4 to 15% isocyanate content. The present invention also relates to a process for the production of the fiber-plastics composites and to use of these.

A resin composition which has oxygen-barrier properties less apt to depend on humidity and has high transparency; and a formed article and a film which include the resin composition are provided. The resin composition includes from 10 to 90 parts by mass of a polyamide resin (A) and from 90 to 10 parts by mass of a polyamide resin (B), wherein the polyamide resin (A) includes constituent units derived from a diamine and constituent units derived from a dicarboxylic acid, with 70 mol % or more of the constituent units derived from a diamine being derived from xylylenediamine and 90 mol % or more of the constituent units derived from a dicarboxylic acid being derived from adipic acid; the polyamide resin (B) includes constituent units derived from a diamine and constituent units derived from a dicarboxylic acid, 70 mol % or more of the constituent units derived from a diamine being derived from xylylenediamine, from 30 to 65 mol % of the constituent units derived from a dicarboxylic acid being derived from an α,ω-linear chain aliphatic dicarboxylic acid having from 4 to 20 carbons, and from 70 to 35 mol % of the constituent units derived from a dicarboxylic acid being derived from isophthalic acid.

A polyarylene ether sulfone contains endgroups of formula (I),

##STR00001##

A molding composition contains the polyarylene ether sulfone; and a fiber, film, or shaped article can be produced using the molding composition.