Suction fleece

A bleeder is an absorbent nonwoven that absorbs the emerging resin when the fiber composite materials (laminate) are pressed in a vacuum and thus enables a laminate with the highest possible fiber volume . It also serves to transport the excess air and distribute the pressure evenly.

Layer structure from the inside out:

• Laminating core / shape
• Fiber layer / layers
• Perforated film
• Suction fleece (nonwoven fabric)
• Vacuum foil or flexible counter-form

The negative pressure must not be too high, as otherwise the fabric of the resin trap is compressed too much and the resin can no longer be picked up.

See also: fiber composite material