Biaxially oriented polyester film and manufacturing method thereof
AssigneeNan Ya Plastics Corporation
InventorsWen-Cheng Yang, Chen An Wu, Chun-Cheng Yang, Chia-Yen Hsiao
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Abstract
A biaxially oriented polyester film having the following physical property is provided: when cooled from the molten state at a cooling rate of 20° C./min, an observed recrystallization temperature is 175° C.-200° C. The biaxially oriented polyester film is formed by a thick sheet before bidirectional stretching that is melted and extruded by an extruder and then cooled and formed on a casting roll. The thick sheet before stretching having the following physical property as analyzed by differential scanning calorimetry: a crystallization rate is less than 10%.
Claims16
A biaxially oriented polyester film, wherein the biaxially oriented polyester film has a following physical property:
- when cooled from a molten state at a cooling rate of 20° C./min, an observed recrystallization temperature (Tc(A)) is 177° C.-200° C., and the biaxially oriented polyester film is formed by a thick sheet before bidirectional stretching that is melted and extruded by an extruder and then cooled and formed on a casting roll, wherein the thick sheet before stretching has a following physical property as analyzed by differential scanning calorimetry:
- a crystallization rate is less than 10%.
Dependencies are inferred from the claim text.