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Page | 17 Vacuum Bagging for Resin Infusion 8. Release Films A film placed over the laminate or part to contain resin during the consolidation and curing process and allow removal of air and volatile gases. 8.1. Release Film Selection, a wide range of release films are available offering a range of performance and pricing level. In order to make a technically suitable and coat effective selection the following factors should be considered. • Temperature resistance, to ensure stable performance during elevated temperature cure cycles. • Chemical resistance, to withstand chemical degradation during full surface contact with curing resin systems. • Elongation & tear strength, elongation of films into sharp corners and surface details will prevent bridging conditions. Good tear resistance is essential where films are expected to conform to shape without failure. • Level of release & surface finish, different release films offer a range of surface finish and ease of release. Higher performance films release more easily and leave a smoother, glossier finish on the part. • Thickness and Width, thicker films can provide more robust performance and smoother finish. Wider films can reduce touch labour during application onto larger parts. • Perforations, Airtech provides the largest choice of perforation styles. Perforations allow air, steam and volatiles to be conducted away from the laminate preventing laminate voids. Perforations can also be used to bleed out excess resin from laminate when required.PDF Image | Vacuum Bagging for Resin Infusion
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