Biaxially oriented pet film and manufacturing method thereof
AssigneeNan Ya Plastics Corporation
InventorsWen-Cheng Yang, Chen An Wu, Chia-Yen Hsiao, Fan-Jie Lin
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Abstract
A biaxially oriented PET film made of a PET resin mixture is provided, wherein the PET resin mixture includes a PET material, a metal catalyst material, and a crystallization inhibiting material, such that when the biaxially oriented PET film is analyzed by differential scanning calorimetry, when the biaxially oriented PET film is cooled from a molten state at cooling rates of 20° C./min and 40° C./min respectively, a difference between a first recrystallization temperature and a second recrystallization temperature observed is greater than 15° C. and less than or equal to 23° C. A manufacturing method of a biaxially oriented PET film is also provided.
Claims10
A biaxially oriented PET film, made of a PET resin mixture, wherein the PET resin mixture comprises a PET material, a metal catalyst material, and a crystallization inhibiting material, such that when the biaxially oriented PET film is analyzed by differential scanning calorimetry, when the biaxially oriented PET film is cooled from a molten state at cooling rates of 20° C./min and 40° C./min, respectively, a difference between a first recrystallization temperature and a second recrystallization temperature observed is greater than 15° C. and less than or equal to 23° C.
A manufacturing method of a biaxially oriented PET film, comprising:
- providing PET chips, wherein the PET chips at least comprise chemically recycled PET chips, and the chemically recycled PET chips have a metal catalyst material and a crystallization inhibiting material;
- melting and extruding the PET chips to form an unoriented thick sheet, wherein the molten PET chips are a PET resin mixture;
- and
- biaxially orienting the thick sheet to form the biaxially oriented PET film, wherein the biaxially oriented PET film is analyzed by differential scanning calorimetry, and when the biaxially oriented PET film is cooled from a molten state at cooling rates of 20° C./min and 40° C./min, respectively, a difference between a first recrystallization temperature and a second recrystallization temperature observed is greater than 15° C. and less than or equal to 23° C.
Dependencies are inferred from the claim text.