Pursuant to the provisions of section 7(c) of the Act, the Commission hereby establishes the generic names for manufactured fibers, together with their respective definitions, set forth in this section, and the generic names for manufactured fibers, together with their respective definitions, set forth in International Organization for Standardization (ISO) 2076:2013(E). ISO 2076:2013(E), “Textiles—Man-made fibres—Generic names,” Sixth edition, November 15, 2013, is incorporated by reference into this section with the approval of the Director of the Federal Register under 5 U.S.C. § 552(a) and 1 CFR part 51.

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To enforce any edition other than that specified in this section, the Federal Trade Commission must publish notice of change in the Federal Register and the material must be available to the public. All approved material is available for inspection at the Federal Trade Commission, 600 Pennsylvania Avenue NW, Room H-630, Washington, DC 20580, (202) 326-2222, and is available from: (a) The International Organization for Standardization, ISO Central Secretariat, Chemin de Blandonnet 8, CP 401-1214 Vernier, Geneva, Switzerland; (+41 22 749 01 11); central@iso.org; https://www.iso.org/home.html; and (b) the American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036-7417; (212) 642-4900; isot@ansi.org; https://www.ansi.org. It is also available for inspection at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, email fedreg.legal@nara.gov, or go to http://www.archives.gov/federal-register/cfr/ibr-locations.html.

(a) Acrylic. A manufactured fiber in which the fiber-forming substance is any long chain synthetic polymer composed of at least 85 percent by weight of acrylonitrile units

(b) Modacrylic. A manufactured fiber in which the fiber-forming substance is any long chain synthetic polymer composed of less than 85 percent but at least 35 percent by weight of acrylonitrile units

$$except fibers qualifying under paragraph (j)(2) of this section and fibers qualifying under paragraph (q) of this section. (Sec. 7, 72 Stat. 1717; 15 U.S.C. § 70e)

(c) Polyester. A manufactured fiber in which the fiber-forming substance is any long chain synthetic polymer composed of at least 85% by weight of an ester of a substituted aromatic carboxylic acid, including but not restricted to substituted terephthalate units,

$$and para substituted hydroxy-benzoate units,$$

(1) Where the fiber is formed by the interaction of two or more chemically distinct polymers (of which none exceeds 85% by weight), and contains ester groups as the dominant functional unit (at least 85% by weight of the total polymer content of the fiber), and which, if stretched at least 100%, durably and rapidly reverts substantially to its unstretched length when the tension is removed, the term elasterell-p may be used as a generic description of the fiber.

(2) Where the glycol used to form the ester consists of at least ninety mole percent 1,3-propanediol, the term “triexta” may be used as a generic description of the fiber.

(d) Rayon.A manufactured fiber composed of regenerated cellulose, as well as manufactured fibers composed of regenerated cellulose in which substituents have replaced not more than 15% of the hydrogens of the hydroxyl groups. Where the fiber is composed of cellulose precipitated from an organic solution in which no substitution of the hydroxyl groups takes place and no chemical intermediates are formed, the term lyocell may be used as a generic description of the fiber.

(e) Acetate. A manufactured fiber in which the fiber-forming substance is cellulose acetate. Where not less than 92 percent of the hydroxyl groups are acetylated, the term triacetate may be used as a generic description of the fiber.

(f) Saran. A manufactured fiber in which the fiber-forming substance is any long chain synthetic polymer composed of at least 80 percent by weight of vinylidene chloride units (-CH9-CCl2-).

(g) Azlon. A manufactured fiber in which the fiber-forming substance is composed of any regenerated naturally occurring proteins.

(h) Nytril. A manufactured fiber containing at least 85 percent of a long chain polymer of vinylidene dinitrile (-CH2-C(CN)2-) where the vinylidene dinitrile content is no less than every other unit in the polymer chain.

(i) Nylon. A manufactured fiber in which the fiber-forming substance is a long-chain synthetic polyamide in which less than 85 percent of the amide

$$linkages are attached directly to two aromatic rings.

(j) Rubber. A manufactured fiber in which the fiber-forming substance is comprised of natural or synthetic rubber, including the following categories:

(1) A manufactured fiber in which the fiber-forming substance is a hydrocarbon such as natural rubber, polyisoprene, polybutadiene, copolymers of dienes and hydrocarbons, or amorphous (noncrystalline) polyolefins.

(2) A manufactured fiber in which the fiber-forming substance is a copolymer of acrylonitrile and a diene (such as butadiene) composed of not more than 50 percent but at least 10 percent by weight of acrylonitrile units

$$The term lastrile may be used as a generic description for fibers falling within this category.

(3) A manufactured fiber in which the fiber-forming substance is a polychloroprene or a copolymer of chloroprene in which at least 35 percent by weight of the fiber-forming substance is composed of chloroprene units

(k) Spandex. A manufactured fiber in which the fiber-forming substance is a long chain synthetic polymer comprised of at least 85 percent of a segmented polyurethane.

(l) Vinal. A manufactured fiber in which the fiber-forming substance is any long chain synthetic polymer composed of at least 50 percent by weight of vinyl alcohol units (-CH2-CHOH-), and in which the total of the vinyl alcohol units and any one or more of the various acetal units is at least 85 percent by weight of the fiber.

(m) Olefin. A manufactured fiber in which the fiber-forming substance is any long chain synthetic polymer composed of at least 85 percent by weight of ethylene, propylene, or other olefin units, except amorphous (noncrystalline) polyolefins qualifying under paragraph (j)(1) of this section [Rule 7]. Where the fiber-forming substance is a cross-linked synthetic polymer, with low but significant crystallinity, composed of at least 95 percent by weight of ethylene and at least one other olefin unit, and the fiber is substantially elastic and heat resistant, the term lastol may be used as a generic description of the fiber.

(n) Vinyon. A manufactured fiber in which the fiber-forming substance is any long chain synthetic polymer composed of at least 85 percent by weight of vinyl chloride units (-CH2-CHCl-).

(o) Metallic. A manufactured fiber composed of metal, plastic-coated metal, metal-coated plastic, or a core completely covered by metal.

(p) Glass. A manufactured fiber in which the fiber-forming substance is glass.

(q) Anidex. A manufactured fiber in which the fiber-forming substance is any long chain synthetic polymer composed of at least 50 percent by weight of one or more esters of a monohydric alcohol and acrylic acid, CH2=CH—COOH.

(r) Novoloid. A manufactured fiber containing at least 85 percent by weight of a cross-linked novolac.

(s) Aramid. A manufactured fiber in which the fiber-forming substance is a long-chain synthetic polyamide in which at least 85 percent of the amide

$$linkages are attached directly to two aromatic rings.

(t) Sulfar. A manufactured fiber in which the fiber-forming substance is a long chain synthetic polysulfide in which at least 85% of the sulfide (—S—) linkages are attached directly to two (2) aromatic rings.

(u) PBI. A manufactured fiber in which the fiber-forming substance is a long chain aromatic polymer having reoccurring imidazole groups as an integral part of the polymer chain.

(v) Elastoester. A manufactured fiber in which the fiber-forming substance is a long-chain synthetic polymer composed of at least 50% by weight of aliphatic polyether and at least 35% by weight of polyester, as defined in paragraph (c) of this section.

(w) Melamine. A manufactured fiber in which the fiber-forming substance is a synthetic polymer composed of at least 50% by weight of a cross-linked melamine polymer.

(x) Fluoropolymer. A manufactured fiber containing at least 95% of a long-chain polymer synthesized from aliphatic fluorocarbon monomers.

(y) PLA. A manufactured fiber in which the fiber-forming substance is composed of at least 85% by weight of lactic acid ester units derived from naturally occurring sugars.

(Sec. 6, 72 Stat. 1717; 15 U.S.C. § 70e) [24 FR 4480, June 2, 1959; 24 FR 5737, July 17, 1959]Editorial Note:For Federal Register citations affecting § 303.7, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.