Method of making a natural rubber vacuum bag by spray processes, Natural rubber vacuum bag made using spray process, and method for using natural rubber bag made using spray process

摘要

Disclosed is a method for making a membrane for use as a vacuum bag, a natural rubbervacuum bag made using such methods, and methods for using such a natural rubberbag to form a composite article. One method can include providing a substantiallynon-porous working surface having a desired shape for forming a vacuum bag, sprayingat least one layer of a natural rubber liquid over at least a portion of workingsurface, and solidifying the natural rubber liquid to form a membrane havinga shape substantially corresponding to that of the working surface. The membraneformed being elastically deformable and substantially impermeable for functioningas a vacuum bag in Vacuum Assisted Resin Transfer Molding, debulking, compaction,or similar processes.