Skc Co., Ltd.

Skc, Inc.

Sk Microworks Co., Ltd.

Sk Microworks America, Inc.

Prorhythm, Inc.

Microworks America, Inc.

Eugene Jung

Jung Kyu Lee

Jaehyong Son

Yongdeuk Kim

Daeyong Shin

Chul Kyu Kim

Joo Ho Yang

Hyuk Soo Lee

Hiroshi Nakagawa

Yong Deuk Kim

Taehoung Jeong

Yong Duck Kim

Dae Yong Shin

Robert C Pacheco

Myeong Rae Cho

Reinhard Warnking

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

Embodiments relate to a polyester film, preparation method thereof and method for reproducing polyethyleneterephthalate (PET) container using same, the crystallization temperature (Tc) of the polyester film is not measured or is 70° C. to 130° C., as measured by differential scanning calorimetry, whereby it is possible to easily control the crystallinity. Accordingly, the polyester film has excellent shrinkage characteristics and recyclability, and clumping rarely occurs even if it is dried at high temperatures for a long period of time in the regeneration process.

Polyester film, preparation method thereof and method for reproducing polyethyleneterephthalate container using same

The embodiments relate to a polyester film, which 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 170&#xb0; C. or higher as measured by differential scanning calorimetry, which not only solve the environmental problems by improving the recyclability of the polyester container, but also are capable of enhancing the yield and productivity, and a process for regenerating a polyester container using the same.

Polyester film and method for reproducing polyester container using same

Embodiments relate to a polyester-based film and a process for regenerating a polyester-based container using the same, which not only solve the environmental problems by enhancing the recyclability of polyester-based containers but also are capable of enhancing the quality, yield, and productivity. When the polyester-based film is cut into a size of 1 cm in width and 1 cm in length, immersed in an aqueous solution of sodium hydroxide (NaOH) having a concentration of 1% by weight, and stirred for 15 minutes at 85&#xb0; C. at a speed of 240 m/minute, the average particle size of the component of the printing layer separated from the base layer satisfies 15 &#x3bc;m or more. Thus, it is possible to enhance the quality of the regenerated polyester-based chips produced from the polyester-based container provided with the polyester-based film.

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

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.

The embodiments relate to a polyester film, which has a high tensile strength in the transverse direction and a low tensile strength in the longitudinal direction, while satisfying the condition of 0.5&#x3c;A&#x3c;6, A being calculated by Equation 1. A polyester film according to the embodiments can easily be cut in the transverse direction.

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Lawrenceville, GA, United States of America

Eugene Jung