REPEATEDLY WRITABLE COMPOSITE SHEET AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a repeatedly writable composite sheet constituted so as to prevent the total reflection of the whole of the sheet and holding easiness to write, beautifulness and easiness to erase without causing that a character or a pattern becomes impossible to see, and its manufacturing method. SOLUTION: The flexible composite sheet is constituted by laminating a base material layer (A) comprising a fabric with a basis weight of 50-250 g/m2, the fluoroplastic layer (B) containing a colorant formed at least on one side of the base material layer and a fluoroplastic layer (C) containing no colorant formed on the fluoroplastic layer (B) containing the colorant. The flexible composite sheet has a surface roughness of 5-20μm and is repeatedly writable. COPYRIGHT: (C)2005,JPO&NCIPI