| 摘要 |
In accordance with the present invention, a thermoplastic film is advanced onto a foraminous surface and impinged with hydraulic energy so as to impart an image or pattern into the film. In an effort to retain the image or pattern within the film, the film is exposed to a frequency range during the drying process, such as that frequency range which is provided by microwaves. It has been found that utilizing a frequency range of electro-magnetic radiation, like that of microwaves during the drying process of the film does not flatten or distort the image or pattern within the film, whereas a drying process utilizing hot air tends to soften the film, which has a deleterious on the image within the film. |
