White easy-adhesive polyester film comprising a nitrogen-containing antistatic agent
AssigneeToyobo Co., Ltd.
InventorsTakeshi Kubo, Eiji Kumagai
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Abstract
A readily adhesive white polyester film comprising a polyester film substrate and a coating layer on at least one surface of the polyester film substrate, the coating layer comprising a cationic antistatic agent containing nitrogen, a polyester resin, and a polyurethane resin, the proportion A (at %) of nitrogen derived from the antistatic agent and the proportion B (at %) of nitrogen derived from the polyurethane resin based on surface element distribution measurement by X-ray photoelectron spectroscopy in the coating layer satisfying the following formulas (i) and (ii), and a surface of the coating layer having a contact angle with respect to water of 50° to 70°: A (at %)>0.4 (i) 2.0≤B/A≤5.0. (ii)
Claims2
A readily adhesive white polyester film comprising a polyester film substrate and a coating layer on at least one surface of the polyester film substrate,
- the coating layer comprising a cationic antistatic agent containing nitrogen, a polyester resin, and a polyurethane resin,
- the proportion A (at %) of nitrogen derived from the antistatic agent and the proportion B (at %) of nitrogen derived from the polyurethane resin based on surface element distribution measurement by X-ray photoelectron spectroscopy in the coating layer satisfying the following formulas (i) and (ii), and
- a surface of the coating layer having a contact angle with respect to water of 50° to 70°:
- A (at %)>0.4 (i)
- 2.0≤B/A≤5.0. (ii)
Dependencies are inferred from the claim text.