Liquid crystal polyester resin pellets containing a liquid crystal polyester and pitch-based carbon fibers, in which a length-weighted average fiber length of the pitch-based carbon fibers is equal to or greater than 100 μm, and the liquid crystal polyester has an interfacial shear strength of equal to or greater than 30 MPa with a single fiber of pitch-based carbon fibers after a sizing agent is removed, which is measured by a single fiber pull-out method; and a liquid crystal polyester resin molded article containing a liquid crystal polyester and pitch-based carbon fibers, in which a length-weighted average fiber length of the pitch-based carbon fibers is equal to or greater than 100 μm, and the liquid crystal polyester has an interfacial shear strength of equal to or greater than 30 MPa with a single fiber of pitch-based carbon fibers after a sizing agent is removed, which is measured by a single fiber pull-out method.

A heat-shrinkable polyester film that has (1) a hot-water heat shrinkage of 40% or more in a main shrinkage direction of the film when immersed in hot water of 98° C. for 10 seconds; (2) a planar orientation coefficient of 0.035-0.070; (3) ethylene terephthalate as a main constituent component and 6-25 mol % diethylene glycol (DEG) constituent in 100 mol % of polyhydric alcohol in all the polyester resin constituting the film; (4) a maximum shrinkage stress of 2-17 MPa in the main shrinkage direction of the film when measured in hot air of 90° C.; and (5) a tensile elongation at break of 20% or more in a direction orthogonal to the main shrinkage direction after the film is aged in an atmosphere with an atmospheric temperature of 40° C. and a relative humidity of 85% for 28 days.

Disclosed are liquid crystal polymer particles capable of reducing dielectric loss tangent while suppressing surface roughness of the resin film, when added to a resin film. The liquid crystal polymer particles have a melting point of 270° C. or higher, wherein cumulative distribution 50% diametre D.sub.50 in the particle size distribution is 20 μm or less, and cumulative distribution 90% diametre D.sub.90 is 2.5 times or less of D.sub.50.

A method for producing an electronic device includes a first step of pasting a support to an organic substrate having a thickness of 1000 μm or less, with a temporary fixing material interposed therebetween, to obtain a laminated body; a second step of heating the temporary fixing material of the laminated body; a third step of mounting a semiconductor chip on the organic substrate of the laminated body that has been subjected to the second step; a fourth step of sealing the semiconductor chip mounted on the organic substrate with a sealing material; and a fifth step of peeling the support and the temporary fixing material from the organic substrate of the laminated body that has been subjected to the fourth step.

Fine polymer particles are prepared by dissolving a polycarbonate, a poly(arylene ether), or a poly(arylene ether sulfone), each in a specific solvent, to form a slurry, heating the slurry to a temperature greater than the solvent boiling point to form a homogeneous solution, cooling the solution to form a dispersion of fine particles, and isolating the fine particles. A volume-based distribution of the isolated fine particles has a median equivalent spherical diameter less than or equal to 125 micrometers.

Provided is an LCP extruded film that can increase process tolerance in manufacture of a flexible laminate, without excessively impairing the basic performance of the liquid crystal polymer. Provided are an LCP extruded film and the like that allow a flexible laminate having high peel strength to a metal foil to be easily obtained under mild manufacturing conditions as compared with the prior art. An LCP extruded film 11 comprising: an aromatic polyester-based liquid crystal polymer at least having at least one selected from the group consisting of para-hydroxybenzoic acid, terephthalic acid, isophthalic acid, 6-naphthalenedicarboxylic acid, 4,4′-biphenol, bisphenol A, hydroquinone, 4,4-dihydroxybiphenol, ethylene terephthalate and derivatives thereof, and 6-hydroxy-2-naphthoic acid and derivatives thereof, as monomer components, the LCP extruded film having a dissolution rate in pentafluorophenol at 60° C. of 25% or more.

A coated film with barrier properties can include a film comprising a layer selected from the group consisting of a polymer layer, vacuum applied coating, a printed layer, and a primer coating; an ethylene vinyl alcohol copolymer/ethylene acrylic acid copolymer blend (EVOH/EAA) barrier coating on the layer and comprising ethylene vinyl alcohol copolymer (EVOH) and ethylene acrylic acid copolymer (EAA) at a weight ratio of EVOH to EAA of 1.5:1 to about 6:1, wherein the EAA has an acrylic acid content of 10 wt % to 35 wt %; and wherein the coated film has percent reduction in oxygen transmission rate (23° C., 50% relative humidity) of 80% or greater relative to a same film without the EVOH/EAA barrier coating.

A polymeric material that includes a thermoplastic composition containing a continuous phase that includes a polyester and a copolyetherester elastomer is provided. The copolyetherester elastomer is dispersed within the continuous phase in the form of discrete domains. A porous network is defined within the thermoplastic composition that includes a plurality of nanopores.

The present disclosure relates to the formation of terephthalate esters. The present invention also relates to the depolymerization of polyethylene terephthalate (PET) or poly(ethylene glycol-co-1,4-cyclohexanedimethanol terephthalate) and the recovery of terephthalate esters

A resin composite material, containing a polyolefin resin, and the following (a) and (b) dispersed in the polyolefin resin: (a) resin particles containing cellulose fibers and a resin different from the polyolefin resin, and having a maximum diameter of 10 μm or more; and (b) resin particles containing a resin different from the polyolefin resin, having a maximum diameter of 10 μm or more, and having an aspect ratio of 5 or more.