CONTENT STICKING PREVENTIVE LID MATERIAL

PROBLEM TO BE SOLVED: To provide a content sticking preventive lid material capable of allowing a soft content such as yogurt to be hardly stuck on a surface of a heat seal material layer. SOLUTION: In the content sticking preventive lid material, a heat seal material layer 5 is formed by joining a polyethylene terephthalate film 1 with a thickness of 12 μm on an upper surface of an aluminum foil 2 with a thickness of 35 μm, by forming an intermediate synthetic resin layer 4 by joining a polyethylene film with a thickness of 20 μm on a lower surface of a base material layer 3 having an anchor coat layer on the aluminum foil 2, and by coating the undersurface with a hot melt with a coating amount of 15 g/m2. The hot melt comprises 55% wax, 5% rosin, 1% silicon oxide and the balance of an ethylene-vinyl acetate copolymer, and the mean surface roughness of the heat seal material layer 5 is 0.5, and the maximum surface roughness is 3.5 μm. COPYRIGHT: (C)2007,JPO&INPIT