AUXILIARY FILM FOR UPPER COVER FOR ENHANCING GAS SEALABILITY AND WATER SEALABILITY OF FILM SECURING PORTION IN FILM STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide an auxiliary film for an upper cover for enhancing gas sealability and water sealability of a film securing portion in a film structure used for enhancing water stop capability of the securing portion and holding thereof without damaging appearance. SOLUTION: An auxiliary film 22 for an upper cover has a base cloth 22a such as a tape-shaped heat resistant glass fiber cloth or the like the right and reverse surfaces of a part of which is coated with TEFLON 22b (R) and the right and reverse surfaces of the other part of which is coated with a rubber 22c. Since the film material comprises the glass fiber cloth part (white) and the rubber coated part (black), construction between the securing portion using the black rubber and the film panel 15 of the white film material has an effect to satisfy the conditions that hot-melt bonding of the same materials is indispensable and the existing appearance is not changed.