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US 2021/0276316 A1Published application
Polyester film
AssigneeUnitika Ltd.
InventorsMasafumi Yamamoto, Sumito Kihara, Takashi Ando
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Abstract
This polyester film has at least one surface constituted of a polyester film layer A, and is characterized in that: a polyester resin constituting the polyester film layer A has an inherent viscosity of 0.63 to 0.85 dl/g; the polyester film layer A contains organic particles and the surface of the polyester film layer A has an arithmetic average roughness (Ra) of a roughness curve of 0.2 to 1.0 μm, and an average length (RSm) of roughness curve elements of 10 to 250 μm.
Claims9
A polyester film comprising:
- a polyester film layer A constituting at least one surface of the polyester film, wherein a polyester resin constituting the polyester film layer A has an inherent viscosity of 0.63 to 0.86 dl/g;
- the polyester film layer A contains organic particles;
- and
- the surface of the polyester film layer A has an arithmetic average roughness (Ra) of a roughness curve of 0.2 to 1.0 μm and an average length (RSm) of roughness curve elements of 10 to 250 μm.
1 more element
Dependencies are inferred from the claim text.