| 摘要 |
<p>Synthetic paper is produced by stretching an unstretched sheet of an alkenic resin under the following temperature conditions: (1) at a lower temperature than the melting point of the resin, the temperature of the innermost layer of the sheet differing from that of the 2 surfaces by is not 10 degrees C, or (2) at such a temperature that one of the surfaces and the inner layer have a temperature lower than the m.pt. of the resin, and the other surface layer has a temperature which is not lower than the m.pt. of the resin and is not >40 degrees C higher than the m.pt. The paper is light in weight and has high tensile strength, tear strength and flexing strength. It does not break on application of pressure. It can be printed easily by means of aqueous or fatty inks, stamps or typewriters, and can be written on by pen or pencil. It is water-resistant, and more opaque than the previous alkenic resin films.</p> |
