| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an envelope with a transparent window which is totally composed of a biodegradable material and has a transparent film with a practically sufficiently high impact resistance strength and further is formed with an excellent productivity. SOLUTION: Laminated paper for biodegradable envelope with a window is formed through laminating a biodegradable resin film on a continuous paper provided with cutout parts for window. The laminated paper for biodegradable envelope with the window is bent into an envelope shape with the biodegradable resin film as an inner side, the overlapped side ends are adhered to each other by the biodegradable material and/or a natural substance, and the bottom ends are also adhered to each other by the same, thus finishing up the biodegradable envelope with the window.</p> |
