| 摘要 |
PURPOSE:To prevent the discoloration of print when bonded to food wraps by enhancing the reliability of pictures by using a releasing paper having a back coat consisting of the first back coat layer having good film-forming property and the second back coat layer having bad film-forming property. CONSTITUTION:The first back coat layer 2, the second back coat layer 3, and an adhesive layer 4 are laminated on the downside of a supporter 1. A silicone resin-processed releasing base paper 5 is bonded to the upside of the layer 4, and a thermal color-forming layer 6 and a protective layer 7 are laminated on the upside of the supporter. The first back coat layer is composed of PVA as main component, containing formalin, glyoxal, etc., as a water resistance improver, and the second layer 3 is composed primarily of a water-soluble high molecular resin other than PVA, containing a filler, a wax, etc., to improve the permeability of oxygen by lowering the film-forming property. The preferred amount of the second layer 3 to be formed is 3g/m<2> or more, whereas in the case of 3g/m<2> less, the oxygen permeability and discoloration preventing effect are decreased. |
