Sk Chemicals Co., Ltd.

Da-Young Hwang

Sung-Gi Kim

Yoo Jin Lee

Kwang-Woo Park

Jong-In Lee

Boo-youn Lee

Ji-Hun Kim

Joong Ki Lee

Sangwoo Kim

Jiyeon Eom

Ha-Neul Kim

Boo-Youn Lee

Hyun-Woo Oh

A polyester resin blend and a molded article formed therefrom are provided. The polyester resin blend exhibits excellent processability even if it contains recycled polyethylene terephthalate as well as virgin polyethylene terephthalate, and can provide high quality molded articles, especially by extrusion blow molding. In addition, it can be reused, and it is expected to be useful for providing continuously usable plastics that have been recently attracting attention. The polyester resin blend comprising polyethylene terephthalate; and a polyester resin having a structure in which an acid moiety derived from a dicarboxylic acid or a derivative thereof and a diol moiety derived from a diol are repeated, wherein the polyester resin comprises a residue derived from a branching agent having at least three functional groups, wherein the dicarboxylic acid or a derivative thereof comprises terephthalic acid or a derivative thereof, wherein the polyester resin comprises 5 to 19 mol % of a diol moiety derived from a comonomer other than ethylene glycol with respect to the total diol moiety, wherein the polyester resin comprises a diol moiety derived from isosorbide as the diol moiety derived from the comonomer, and the polyester resin comprises 0.1 to 15 mol % of the diol moiety derived from isosorbide with respect to the total diol moiety. The polyester resin has a processability parameter value of 2 to 15.

Polyester resin blend and article formed from the same

The present invention relates to a crystalline polyester resin and to a process for preparing the same. Since the crystalline polyester resin has a crystallinity required in a molding process and/or a recycling process while fusion is minimized during the preparation process, it can have excellent productivity, moldability, recyclability, and the like.

Crystalline polyester resin and manufacturing method thereof

The present disclosure relates to a polyester film and a preparation method of the same. Since the polyester film includes a resin layer formed from a mixture comprising a polyester resin, which includes a first diol moiety derived from isosorbide and a second diol moiety derived from cyclohexanedimethanol in a controlled ratio, and polyethylene terephthalate in a specific ratio, it is possible to exhibit improved heat resistance and adhesion with excellent light transmittance.

Polyester film and preparation method thereof

This polyester resin comprises a bis(2-hydroxyethyl)terephthalate monomer which is obtained by depolymerization of waste polyester and which has a diethylene glycol ester content adjusted to be a certain level or less. The polyester resin, despite of being a recycled resin, has the same level of quality as the original resin and thus can be used in manufacturing articles in various fields.

Polyester resin using recycled bis(2-hydroxyethyl) terephthalate and article including same

The present disclosure relates to a polyester resin blend. The polyester resin blend exhibits excellent miscibility even if it contains recycled polyethylene terephthalate as well as virgin polyethylene terephthalate, and can provide molded articles with high transparency.

Polyester resin blend

A stretched polyester film and a method for preparing the stretched polyester film are disclosed. The stretched polyester film contains a polyester resin in which a diol component and a dicarboxylic acid component are polymerized, wherein the heat shrinkage rate of the film at 80° C. in the main shrinkage direction is 40% or more, and, upon a first thermal treatment and a second thermal treatment, a first melting temperature (T) and a second melting temperature (T) appear when the film is analyzed by differential scanning calorimetry (DSC). The stretched polyester film has excellent heat shrinkability, along with an increased efficiency of a recycling process of waste plastic containers.

Stretched polyester film and method for preparing the same

The present disclosure relates to a method for purifying bis-2-hydroxyethyl terephthalate with high purity and a polyester resin containing the same.

Method for purifying bis-2-hydroxylethyl terephthalate and polyester resin comprising same

A polyester resin comprising regenerated BHET according to an embodiment has excellent heat resistance characteristics since a diethylene glycol generated from the regenerated BHET to remain in the polyester resin is adjusted to a predetermined level or less, so that the polyester resin can be manufactured into a heat-shrinkable film.

Polyester resin comprising regenerated bis(2-hydroxyethyl)terephthalate and film

The present disclosure relates to a polyester film and a preparation method of the same. Since the polyester film includes a resin layer formed from a polyester resin including a first diol moiety derived from isosorbide and a second diol moiety derived from cyclohexanedimethanol in a controlled ratio on at least one surface of a base layer, it is possible to exhibit excellent heat resistance and adhesion.

Growing community of inventors

Gyeonggi-do, South Korea

Da-Young Hwang