| 摘要 |
A process for fabricating by calendering a continuous composite ribbon composed of an openly woven fabric even free of side "selvedge" and/or with weft and warp oriented at any angle from 0° to 45° relative to the advancement direction of the ribbon, over both sides of which respective silicone films are permanently coupled, effectively prevents the insurgence of undulations in the finished composite ribbon because of deformations of the open fabric during the coupling step. This result is achieved by: pre-joining permanently a first silicone film (6) onto a first side of the fabric (T) by laminating them at a load and temperature sufficiently high to produce the coupling of the fabric to the silicone film, between a coupling cylinder (15) and the discharge cylinder (3) of the first film of silicone of the respective pair of laminating cylinders (3,4); applying the second silicone film (5) produced by the other pair of laminating cylinders (1,2) of the calender onto the other side of the fabric (T), by calendering the fabric pre-joined permanently to the first silicone film and the second silicone firm between the cylinders of the inner pair of cylinders (2,3) of the calender at a relatively low lamination load, for disposing the second silicone film over the fabric pre-joined to the first silicone film, with negligible tensioning of the fabric; coupling the second silicone film by laminating the composite ribbon at a load and temperature sufficient to determine a permanent joining of the second silicone film to the fabric previously joined permanently to the first silicone film, between cylinders (18,19) of an auxiliary coupling station (17) associated to the calender, establishing weld spots between the silicone of the two silicone films through the openings of the fabric. An implementing fabrication line is also described.
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