modacryl

Modacryl, also known as modacrylic, is a class of synthetic fiber produced from copolymers of acrylonitrile with one or more comonomers such as vinyl chloride, vinylidene chloride, or other monomers. In these polymers, the acrylonitrile content is typically below 85 percent, with the specific composition giving distinct properties from pure polyacrylonitrile. The presence of chlorine-containing comonomers often contributes to inherent flame retardancy, making modacryl fibers self-extinguishing after the removal of a flame source.

Modacryl fibers are generally soft, lightweight, and have good drape. They respond well to bright dyes and can be produced in vivid colors, including through solution dyeing. Because of their flame-resistant nature, they are used in applications where reduced flammability is desirable. Common uses include wigs and costume fibers, carpeting and upholstery, blankets, stage costumes, and certain protective or flame-resistant textiles for industrial or children’s clothing.

Care and handling typically emphasize moderate heat sensitivity. Modacryl fibers can melt or fuse at relatively low temperatures, so high heat should be avoided during ironing or heat-setting. They may be sensitive to harsh oxidizing bleaches or aggressive chemicals and can exhibit static buildup or pilling in some fabrics. Compared with some other synthetics, modacryl fibers may offer lower tensile strength and abrasion resistance, but their flame resistance and color capabilities keep them relevant for specialized textiles and decorative uses.