Biaxially oriented polyester film
AssigneeToyobo Co., Ltd.
InventorsNobuyuki Manabe, Masayuki Haruta
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Abstract
Disclosed is a biaxially oriented polyester film that is superior in transparency and easy to perform secondary processing such as coating and vapor deposition, and satisfies performance after the secondary processing. The biaxially oriented polyester film consists of a polyester resin composition including particles, and at least one surface of the film satisfies all of the following requirements (1) to (3): (1) the number of micro protrusions having a height of less than 3 nm per an area of 4×10−12 m2 of 250 or more and 600 or less; (2) the number of micro protrusions having a height of 3 nm or more per an area of 4×10−12 m2 of 300 or more and 600 or less; and (3) an arithmetic average height Sa of 0.010 μm or more and 0.025 μm or less.
Claims6
A biaxially oriented polyester film consisting of a polyester resin composition including particles, wherein at least one surface of the film satisfies all of the following requirements (1) to (3):
- (1) the number of micro protrusions having a height of less than 3 nm per an area of 4×10−12 m2 is 250 or more and 600 or less;
- (2) the number of micro protrusions having a height of 3 nm or more per an area of 4×10−12 m2 is 331 or more and 600 or less;
- and
- (3) an arithmetic average height Sa of 0.010 μm or more and 0.025 μm or less.
Dependencies are inferred from the claim text.