Composite material manufacture based on one or more plastic films involves use of corona treatment and heaters prior to laminating rolls between which films are joined

摘要

The films are fed through a laminator(7) and prior to lamination at least one film(4,6) is subjected to corona treatment. During or after corona treatment the film is heated to a temperature which allows elastic deformation in the laminating rolls(8,9) and gives good adhesion between the layers without use of adhesive. An Independent claim is made for equipment for producing the composite laminated material which includes two laminating rolls(8,9) preceded by a corona discharge treatment unit(10,11) for each film(4,6). The corona treatment units are symmetric with a heater(14) over whose external faces(15,16) the plastic films pass.