Once you move beyond staple wet layup, you will meet a long list of consumables: peel ply, free film, schnorkel framework, flow media, vacuum-clean film, and sealant tape. Each has a specific job, and sympathy them makes hoover bagging and infusion much less discouraging carbon fiber fabric.
The idea behind hoover processing is simple. After egg laying carbon paper fabric and rosin on a mold, you seal the whole stack up under a flexible film and pull a vacuum-clean. Atmospheric hale then presses the laminate , squeezing out surplusage rosin and trapped air. The lead is typically a ignitor, denser, and more homogeneous part than hand layup produces.
The outmost level is the vacuum film, also called bagging film. It forms the gas-tight over the part. It must be warm enough to extend over the mold without lachrymation, and it should match the temperature your rosin will strive during cure. Pleats in the film at corners prevent it from bridging and pull away.
Sealant tape, often named mastic tree or wet tape, creates the gas-tight seal between the film and the mold rise up. It is practical around the edge of the mold before the bag goes on. A poor seal is the most commons cause of vacuum leaks, so weight-lift the tape down securely and check for gaps around pleats and fittings.
Release film is a thin impressible level placed over the laminate to keep the other consumables from protrusive to the part. Perforated versions allow surplus resin and air to pass through into the layers above. Choosing between punctured and non-perforated unfreeze film controls how much rosin is closed out of the laminate.
Peel ply is a woven framework laid direct on the laminate. It leaves a clean, unsmooth rise up after you peel it away, which is apotheosis for soldering or picture. It also helps absorb a little rosin and gives an even finish.
Breather fabric sits on top and gives air a path to travel to the vacuum-clean port. It also absorbs excess resin and cushions the bag against acutely edges. Without schnorchel, the film can seal itself against the part and trap air pockets, so it is requisite in prepreg and wet layup sacking.
In rosin extract, flow media replaces some of these layers. It is an open mesh that lets resin spread quickly across the surface before soaking down into the framework. Together with coil tubing or extract connectors and resin lines, it controls how and where resin travels.
Finally, you need a vacuum pump, a resin trap to protect it, and fittings that the bag to the system. Test the bag for leaks before introducing rosin by pulling hoover and checking that it holds. Beginners should start with a moderate flat panel and practise the process. A made first bag teaches more than any steer, and once you sympathise what each expendable does, edifice a sacking pile becomes orderly rather than mystic.