What is the name of the material used within the vacuum bag pressure system to absorb excess resin during curing?

The material used within the vacuum bag pressure system to absorb excess resin during curing is known as the bleeder. Bleeder materials are designed to allow excess resin to pass through during the infusion process. This is crucial because it helps prevent the formation of voids or bubbles within the composite structure by ensuring that the correct resin-to-fiber ratio is maintained.

Bleeder materials also promote even pressure distribution within the vacuum bag and facilitate drainage of excess resin, ensuring optimal curing conditions. Their properties help ensure that the final product has the desired mechanical properties and finish.

The other choices represent different components of the vacuum bagging process but do not serve the specific function of resin absorption during curing. For instance, sealers are used to create a vacuum-tight environment, vacuum film holds the bagging system in place, and core materials provide structural support but do not absorb resin.