Polyester film, preparation method thereof and method for reproducing polyethyleneterephthalate container using same
AssigneesSK microworks Co., Ltd., SK Microworks America, Inc.
InventorsChul Kyu Kim, Eugene Jung, Yong Deuk Kim, Joo Ho Yang, Hyuk Soo Lee
Life of this patent
Estimating the term…
Abstract
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.
Claims7
A polyester film, which comprises a copolymerized polyester resin in which a diol and a dicarboxylic acid are copolymerized,
- wherein the crystallization temperature (Tc) of the film is not measured or is 70° C. to 130° C. by differential scanning calorimetry,
- when the flakes obtained by crushing a polyethylene terephthalate (PET) container provided with the polyester film are thermally treated at a temperature of 210° C. for 90 minutes, the clumping ratio is 10% or less, and
- the diol comprises neopentyl glycol in an amount of 5% by mole to 35% by mole based on the total number of moles of the diol.
Dependencies are inferred from the claim text.