| 摘要 |
PURPOSE:To obtain a laminate having a good edge-protection and a good shelf stability, by preparing a laminate whose both surfaces comprise thermoplastic resin layers including at least one or more laser absorbing layer and covering the edge with a thermoplastic resin melted by irradiating a laser ray. CONSTITUTION:A laminate whose both surfaces comprise thermoplastic resin and include at least one or more laser absorbing layer among them is used. Then a laser ray is irradiated from the above edge of the laminate. Each layer 3 and 5 of the laser absorbing layers 3 and 5 at each laminate edge 13, 13 is evaporated and also the thermoplastic resin layers 2, 4 and 6 at each laminate edge 13, 13 are melted by the evaporation heat. A laminate whose edge is covered is obtained by covering each edge face 7 and 7 of the laminate with the melted thermoplastic resin. Polyethylene etc. is used as a resin comprising the thermoplastic resin layers. A layer made of a metal, etc., for instance, is used as the laser absorbing layer. A gas laser etc. for example, whose wavelength is 0.5-4mum is used as the laser ray. |
