Man-Made Fiber ("MMF")
Harmonized Tariff Schedule of the U.S. Chapter 54 Note 1
Throughout the tariff schedule, the term "man-made fibers" means staple fibers and filaments of organic polymers produced by manufacturing processes, either:
(a) By polymerization of organic monomers to produce polymers such as polyamides, polyesters, polyolefins or polyurethanes, or by chemical modification of polymers produced by this process (for example, poly(vinyl alcohol) prepared by the hydrolysis of poly(vinyl acetate)); or
(b) By dissolution or chemical treatment of natural organic polymers (for example, cellulose) to produce polymers such as cuprammonium rayon (cupro) or viscose rayon, or by chemical modification of natural organic polymers (for example, cellulose, casein and other proteins, or alginic acid), to produce polymers such as cellulose acetate or alginates.
The terms "synthetic" and "artificial", used in relation to fibers, mean: synthetic: fibers as defined at (a); artificial: fibers as defined at (b). Strip and the like of heading 5404 or 5405 are not considered to be man-made fibers.
The terms "man-made", "synthetic" and "artificial" shall have the same meanings when used in relation to "textile materials".
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This page last updated 5/22/2014.