| 摘要 |
PURPOSE:To prevent the bleeding of a hot melt adhesive material during the use at and under a high temp. and high humidity by coating the adhesive material with a sealing material having the softening temp. higher than the softening temp. of the adhesive material. CONSTITUTION:Substrates 1, 1' respectively formed thereon with recording films 2, 2' are stuck to each other by the hot melt adhesive material 3 in such a manner that the films 2, 2' are positioned on the inside. The sealing material 4 is formed to the end face of the stuck outside periphery. The sealing material 4 is constituted of the material having the softening temp. higher than the softening temp. of the adhesive material 3. The bleeding of the adhesive material 3 during the use at and under the high temp. and high humidity is thereby eliminated and the exfoliation of the substrates is prevented. |
