| 摘要 |
A composite laminar material for use in the production of a release liner comprises a substrate of at least partly porous material, and a barrier layer, on at least one surface of the substrate, of substantially impermeably material having a smooth surface facing away from the substrate, to which a layer of low-adhesion material such as silicone will bond if applied thereto. A method of producing such a material involves applying the barrier layer in thixotropic form or as part of a thixotropic composition to at least one face of a web of woven or non-woven fibrous material by rollers in such a way as to lie on the surface of the web without substantial penetration, the barrier layer being cured by irradiation with ultraviolet light to form a smooth surface, and subsequently applying a layer of release agent to the barrier layer. |
