Generic term for a family of thermoplastic resins, derived from the esters of amides of acrylic or methacrylic acid, used in printing inks and adhesives for packaging applications and as modifiers in polyvinyl chloride materials. Acrylic resins are widely used for their strength, rigidity, and their compatibility with other plastics, and are also the basis of Lucite and Plexiglas. Acrylic films are also used as substrates in screen printing. See Acrylic Ink and Acrylic Adhesive. See also Resin.