GLOSSARY OF TERMS
V

Vacuum Bag Molding: process in which a sheet of flexible transparent material plus bleeder cloth and release film are placed over the lay-up on the mold and sealed at the edges. A vacuum is applied between the sheet and the lay-up. The entrapped air is mechanically worked out of the lay-up and removed by the vacuum, and the part is cured with temperature, pressure, and time. Also called bag molding.

Veil: ultra thin mat similar to a surface mat. Veil allows for a resin rich surface without overloading your composite with too much resin. Too much resin in relation to your reinforcement can weaken the composite, adding weight without adding strength.

Vinyl Esters: class of thermosetting resins containing esters of acrylic and/or methacrylic acids, many of which have been made from epoxy resin. cure is accomplished as with unsaturated polyesters by copolymerization with other vinyl monomers, such as styrene. Schmelzer Industries offers veils and mats with vinyl binders.

Viscosity: liquid properties of a material. Resistance to flow.

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