| 摘要 |
PURPOSE:To obtain a film envelope wherein sizes of a housing of an envelope and the envelope are constant and adhesion strength is good. CONSTITUTION:In a film envelope wherein one of pieces 1a of an envelope is made of paper and the other piece 1b is made of a synthetic resin film, both pieces 1a, 1b of the envelope are overlaid via a thermosensitive adhesive agent 2 on three side rims and adhered to each other by thermocompressing. Thus the adhesive agent may not soak into paper, and the envelope can be formed with a constant width of an adhered part. |
