A vacuum bag provides pressure and vacuum, which always results in a better quality laminate. Pressure compacts the laminate, providing good consolidation and interlaminar bonds. Vacuum draws out the volatiles and trapped air, resulting in a low void content. Both help to improve resin flow. The latest generation vacuum bags for ambient cure compete on cost with polyethylene sheet, but offer superior performance. Poly Release Film is a clear, low temperature plastic release film. With a meltpoint of 120 centigrade, it is designed for use in rubber and prepreg processing up to 120centigrade and will release from all resin system. Two type of Backer, perforated film and non-perforated film.Non-perforated film is used between tool and resin to prevent the resin stickto the tool. Perforated film can be applied in between prepreg and breatherfabric to prevent two resin from sticking. The thickness of the film before emboss is 0.06~ 0.2mm |