Double-Vacuum-Bag Process for Composite Fabrication (LAR-16877)

The traditional single-vacuum-bag (SVB) assembly inherently hinders and/or retards the volatiles depletion mechanisms during composite fabrication because a vacuum-generated compaction force is applied to the laminate during volatile depletion. An innovative DVB assembly was designed to overcome such a deficiency. The DVB process eliminates the compaction force generated by vacuum suction while maintaining the vacuum effectiveness for the volatile depletion. This invention has been proven and validated to be effective for volatile management and resin content control in composites with reactive resin matrices such as polyimides and phenolics and solvent containing prepregs.

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