| 摘要 |
An 1-10wt% water acid solution of the water acid poly urethane resin is spread on the polyester film. The solution contains the content of 0.01-0.5wt% of surfactant and 0.1-0.3wt% of silica group additive. At this time, polyester as the marked film has the limited viscosity of 0.5-0.8dl/g, and more than 60%wt is formed of the homo polyester of polyethylene terephthalate. Also, the metal evaporation process is provided that the metal is heated or is given sputtering under high vacuum within the range of 1/000-1/100000, at the temperature over the melting point where the vapor pressure of metal is over 1/100 torr. Herein, the metal is aluminum, and the depth of the adaptable metal is 300-600 Angstrom.
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