The present invention relates to a process for preparing transparent polybutylene naphthalate polyester, for improving barrier performance of polyesters used in making of monolayer or multilayer containers, comprising steps of: a) mixing butane diol with polymerization catalysts, monoethylene glycol, color toner, and at least one crystallization suppressing agent, wherein said crystallization suppressing agent controls the rate of crystallization so as to control size and shape of crystals to ensure transparency; b) reacting said mixture with naphthalene dicarboxylic acid or ester thereof to obtain oligomerized product via esterification or ester interchange; c) polymerizing said oligomer using at least one polymerization catalyst to obtain amorphous polybutylene naphthalate polyester chips; d) crystallizing said polybutylene naphthalate polyester chips; and e) subjecting said polyester chips to solid state polymerization to upgrade the intrinsic viscosity (I.V.) up to more than 0.40 dl/gm.

A polyarylate resin includes repeating units (1), (2), and (4).

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The polyarylate resin further includes a repeating unit (3) and a percentage of the number of repeats of the repeating unit (3) relative to the total number of repeats of each of the repeating units (1) and (3) is greater than 0% and less than 50%. Alternatively, the polyarylate resin does not include the repeating unit (3).

The invention discloses bi-axially oriented coated polyester films having high tear initiation resistance and comprising a polyester base film and a heat sealable coating, said heat sealable coating comprising one or more amorphous copolyester(s) comprising units of terephthalic acid, naphthalene dicarboxylic acid and at least one diol. The films are heat-sealable and peelable to polyester and aluminium containers. The invention also relates to a process for the manufacturing of such films, to the use of said films in food packaging and to the packages obtained therefrom.

A high barrier oriented PET film includes one or more PET layers forming a core of the PET film and one or more outer layers of a dispersed nylon containing PET positioned on the core.

A high barrier oriented PET film includes one or more PET layers forming a core of the PET film and one or more outer layers of a dispersed nylon containing PET positioned on the core.

A thermoplastic resin composition of the present invention comprises: about 100 parts by weight of a thermoplastic resin containing at least one of a polyamide resin and a polyester resin; and about 1 to about 5 parts by weight of zinc oxide, wherein the zinc oxide has an average particle size (D50), as measured by a particle analyzer, of about 0.8 to about 3 μm, and wherein the intensity ratio (B/A) of peak A in a region of 370-390 nm and peak B in a range of 450-600 nm, at the time of photoluminescence measurement, is about 0.01 to about 1.0. The thermoplastic resin composition is excellent in weather resistance, antibacterial properties, mechanical properties, and the like.

A thermoplastic resin composition of the present invention comprises: about 100 parts by weight of a thermoplastic resin containing at least one of a polyamide resin and a polyester resin; and about 1 to about 5 parts by weight of zinc oxide, wherein the zinc oxide has an average particle size (D50), as measured by a particle analyzer, of about 0.8 to about 3 μm, and wherein the intensity ratio (B/A) of peak A in a region of 370-390 nm and peak B in a range of 450-600 nm, at the time of photoluminescence measurement, is about 0.01 to about 1.0. The thermoplastic resin composition is excellent in weather resistance, antibacterial properties, mechanical properties, and the like.

The present application relates to a polyester resin composition that includes a polyester resin having a predetermined composition and a polycarbodiimide in a predetermined amount that exhibits heat resistance, transparency and impact resistance and prevents embrittlement after heat treatment. The present application also relates to a polyester-based injection-molded article, a polyester-based extruded article, a polyester-based foam, a polyester-based container, a polyester-based bottle, a polyester-based tableware, and a polyester-based nursing bottle.

The present invention provides a composition having a sufficiently satisfying level of processability, curability, retort resistance or heat resistance, and abrasion resistance. The present invention relates to a composition containing: a solvent; thermoplastic resin (A) particles undissolved in the solvent; and a thermoplastic resin (B) dissolved in the solvent.

The present invention provides a composition having a sufficiently satisfying level of processability, curability, retort resistance or heat resistance, and abrasion resistance. The present invention relates to a composition containing: a solvent; thermoplastic resin (A) particles undissolved in the solvent; and a thermoplastic resin (B) dissolved in the solvent.