| 摘要 |
PROBLEM TO BE SOLVED: To make a recorded image quality excellent, and in addition, reduce a heat-shrinkage curl after a recording by using a non-drawn polystyrene film as a supporting body. SOLUTION: A non-drawn polystyrene film is used as a supporting body. The film with a thickness of approx. 20-200 μm is used. As a polystyrene resin for the non-drawn polystyrene film, an impact-resistant polystyrene resin of which the Izod impact strength value is 6.0 kg-cm/cm or higher is preferable, and especially the resin of 8.0 kg-cm/cm or higher is preferable. For the manufacture of the non-drawn film, the inflation method is used. By the inflation method, the heat-shrinkage of the film can be made smaller compared with the T die method to manufacture a drawn film. By using such a non-drawn polystyrene film as the supporting body, the recorded image quality is made excellent, and in addition, a heat-shrinkage curl after a recording is reduced, compared with drawn polystyrene films. |
