Skc Co., Ltd.

Skc, Inc.

Sk Microworks Co., Ltd.

Sk Microworks America, Inc.

Lg Chem, Ltd

Yongdeuk Kim

Chul Kyu Kim

Kyung-Hyun Kim

Jung Kyu Lee

Eugene Jung

Jaehyong Son

Daeyong Shin

Joo Ho Yang

Yu-Na Kim

Jea-Seok Yim

The embodiments relate to a heat shrinkable film and a process for regenerating a polyester container using the same. The heat shrinkable film comprises a copolymerized polyester resin comprising a diol component and a dicarboxylic acid component and has a heat shrinkage rate of 30% or more in the main shrinkage direction upon thermal treatment at a temperature of 80° C. for 10 seconds, a melting point of 190° C. or higher as measured by differential scanning calorimetry, and a peak temperature (Tp) of 95° C. to 115° C. as measured in the endothermic and exothermic curve (heat flow) by differential scanning calorimetry. It not only solves the environmental problem by improving the recyclability of the polyester container, but also is capable of enhancing the yield and productivity.

Heat shrinkable film and method for reproducing polyester container using same

A heat shrinkable film shows a heat shrinkage rate in the direction perpendicular to the main shrinkage direction that is not high even at high temperature and is printable thereon. The heat shrinkable film includes a polyester resin, wherein the heat shrinkage characteristics in the direction perpendicular to the main shrinkage direction satisfy the following Relationships 1 and 2:&#x2212;15&#x2264;&#x394;&#x2264;0&#x2003;&#x2003;Relationship 10&#x2264;&#x394;&#x2264;5&#x2003;&#x2003;Relationship 2

Heat shrinkable film and preparation method thereof

Embodiments relate to a process for regenerating a polyester container and a polyester film to be used therein, which not only solve the environmental problems by improving the recyclability of polyester containers, but also are capable of enhancing the quality, yield, and productivity. The process for regenerating a polyester container comprises providing the polyester container and a heat-shrunken polyester film that wraps at least part of the polyester container; crushing the polyester container and the heat-shrunken film to obtain flakes; and thermally treating the flakes to produce regenerated polyester chips, wherein when the flakes are thermally treated at a temperature of 200&#xb0; C. to 220&#xb0; C. for 60 minutes to 120 minutes, the clumping fraction is 9% or less, the flakes comprise first flakes obtained by crushing the container and second flakes obtained by crushing the heat-shrunken polyester film, the heat-shrunken polyester film comprises a copolymerized polyester resin comprising a diol component and a dicarboxylic acid component, and the amount of change in Col-a (&#x394;a) before and after the heat-shrunken polyester film is dried at 210&#xb0; C. for 90 minutes is 1.50 or less, or the amount of change in Col-b (&#x394;b) before and after the film is dried at 210&#xb0; C. for 90 minutes is 1.50 or less.

Method for reproducing polyester container and polyester film used in the method

Embodiments relate to a heat shrinkable film and a process for regenerating a polyester container using the same. The heat shrinkable film comprises a copolymerized polyester resin comprising a diol component and a dicarboxylic acid component and has a heat shrinkage rate of 30% or more in the main shrinkage direction upon thermal treatment at a temperature of 80&#xb0; C. for 10 seconds and a melting point of 190&#xb0; C. or higher as measured by differential scanning calorimetry. It not only solves the environmental problems by improving the recyclability of the polyester container, but also is capable of enhancing the yield and productivity.

Embodiments relate to a process for regenerating a polyester container and regenerated polyester chips prepared therefrom. The process comprises preparing a polyester container provided with a heat shrinkable film; crushing the container provided with the heat shrinkable film to obtain flakes; and thermally treating the flakes to produce regenerated polyester chips, wherein when the flakes are thermally treated at a temperature of 200&#xb0; C. to 220&#xb0; C. for 60 minutes to 120 minutes, the clumping fraction is 5% or less, and the flakes comprise first flakes obtained by crushing the container and second flakes obtained by crushing the heat shrinkable film. It not only solves the environmental problems by improving the recyclability of the polyester container, but also is capable of enhancing the yield and productivity.

Method for reproducing polyester container and reproduced polyester chip prepared therefrom

Embodiments relate to a heat shrinkable film, which has a heat shrinkage rate in the direction perpendicular to the main shrinkage direction that is not high even at a high temperature and which is printable thereon. The heat shrinkable film comprises a polyester resin, wherein the heat shrinkage characteristics in the direction perpendicular to the main shrinkage direction satisfy the following Relationships 1 and 2:&#x2212;15&#x2264;&#x394;&#x2264;0&#x2003;&#x2003;[Relationship 1]0&#x2264;&#x394;&#x2264;5&#x2003;&#x2003;[Relationship 2]

A heat shrinkable film and a process for regenerating a polyester container using the same. The heat shrinkable film comprises a copolymerized polyester resin comprising a diol component and a dicarboxylic acid component and has a heat shrinkage rate of 30% or more in the main shrinkage direction upon thermal treatment at a temperature of 80&#xb0; C. for 10 seconds and a melting point of 190&#xb0; C. or higher as measured by differential scanning calorimetry. It not only solves the environmental problems by improving the recyclability of the polyester container, but also is capable of enhancing the yield and productivity.

A process for regenerating a polyester container and regenerated polyester chips prepared therefrom. The process comprises preparing a polyester container provided with a heat shrinkable film; crushing the container provided with the heat shrinkable film to obtain flakes; and thermally treating the flakes to produce regenerated polyester chips, wherein when the flakes are thermally treated at a temperature of 200&#xb0; C. to 220&#xb0; C. for 60 minutes to 120 minutes, the clumping fraction is 5% or less, and the flakes comprise first flakes obtained by crushing the container and second flakes obtained by crushing the heat shrinkable film. It not only solves the environmental problems by improving the recyclability of the polyester container, but also is capable of enhancing the yield and productivity.

Growing community of inventors

Jeollanam-do, South Korea

Yongdeuk Kim