| 摘要 |
PURPOSE:To obtain a film with a uniform stretching degree unnecessitating heating and causing no thermal deterioration of the film by a method wherein the film composed of organic polymer is stretched by a plastic solvent such as halogen series solvent that plasticizes said organic polymer. CONSTITUTION:Film composed of organic polymer such as olefin polymer, polyester polymer, helogen polymer, etc. is dipped in aromatic organic solvent, halogen organic solvent, etc. that plasticize organic polymer or plastic solvent solution containing them in combination or exposed in such atmosphere to be plasticized. Then, this plastic film is stretched. In this manner, stretched film that is easy to take a uniform draw ratio and does not deteriorate by heating can be obtained by the energy-conserving stretching method. |
