LUMINANCE-ENHANCED FILM AND MANUFACTURING METHOD THEREOF

摘要

PURPOSE: A brightness strengthened film and a manufacturing method thereof are provided to prevent roll pollution due to a leakage of ultraviolet ray absorbent materials, thereby preventing conversion to a carbonized material inside of an ultraviolet ray absorbent sheet. CONSTITUTION: A brightness strengthened film is laminated including a birefringence sea-island fiber between sheets(15,17). The birefringence sea-island fiber includes a plurality of island parts and sea parts. An optical modulation effect is generated inside of a base material by arranging the island parts inside of the sea part. A birefringence interfacial surface is arranged between the sea part and the island part. An ultraviolet ray absorbent material is included inside of the birefringence sea-island fiber.