Addressing the Release Challenges of Vacuum Bagging

The vacuum bagging method of molding parts is commonly associated with “advanced composites,” as high strength fibers are most often used in the process. These fibers tend to be in pre-impregnated (pre-preg) composite materials which are laid on a mold surface, consolidated with bagging materials under vacuum, and then heat-cured – most often by autoclave. The mold release system utilized in this process must ensure that the pre-preg remains in place during the lay-up procedure while, at the same time, provide sufficient slip to allow easy fiber placement. Often, tackifiers are used to keep the pre-preg in place. In addition, these materials should not affect the mold release system utilized if they are employed in the process.

Chem-Trend has decades of experience working directly on the shop floor with molders of advanced composites using the vacuum bagging method. We understand the challenges, not only of keeping the pre-preg in place during the process, but also of protecting the molds and producing quality parts time and again in an efficient manner. To learn more about the resources and products we have developed specifically for the vacuum bagging process read our Pre-preg Process page.

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