Description

1.1 These test methods cover the identification of the following textile fibers used commercially in the United States:

Acetate (secondary)	Nylon
Acrylic	Nytril
Anidex	Olefin
Aramid	Polycarbonate
Asbestos	Polyester
Cotton	Ramie
Cuprammonium rayon	Rayon (viscose)
Flax	Saran
Fluorocarbon	Silk
Glass	Spandex
Hemp	Triacetate
Jute	Vinal
Lycocell	Vinyon
Modacrylic	Wool
Novoloid

1.2 Man-made fibers are listed in 1.1 under the generic names approved by the Federal Trade Commission and listed in Terminology D123, Annex A1 (except for fluorocarbon and polycarbonate). Many of the generic classes of man-made fibers are produced by several manufacturers and sold under various trademark names as follows (Note 1):

Acetate	Acele®, Aviscon®, Celanese®, Chromspun®, Estron®
Acrylic	Acrilan®, Courtelle®, Creslan®, Dralon®, Orlon®, Zefran®
Anidex	Anim/8®
Aramid	Kevlar®, Nomex®, Technora®, TeijinConex®, Twaron®
Cuprammonium	Bemberg®
Fluorocarbon	Teflon®
Glass	Fiberglas®, Garan®, Modiglass®, PPG®, Ultrastrand®
Lyocell	Tencel®
Modacrylic	Dynel®, Kanecaron®, Monsanto SEF®, Verel®
Novoloid	Kynol®
Polyamide
(Nylon) 6	Caprolan®,Enka®, Perlon®, Zefran®, Enkalon®
Polyamide
(Nylon) 6, 6	Antron®, Blue C®, Cantrece®, Celanese Phillips®, Enka®Nylon
Polyamide
(Nylon) (other)	Rilsan®(nylon 11), Qiana®, StanylEnka®,(Nylon 4,6)
Nytril	Darvan®
Olefin	Durel®, Herculon®, Marvess®, Polycrest®
Polyester	Avlin®, Beaunit®, Blue C®, Dacron®, Encron®, Fortrel®, Kodel®, Quintess®, Spectran®, Trevira®, Vyoron®, Zephran®, Diolen®, Vectran®
Rayon	Avril®, Avisco®, Dynacor®, Enka®, Fiber 700®, Fibro®, Nupron®, Rayflex®, Suprenka®, Tyrex®, Tyron®, Cordenka®
Saran	Enjay®, Saran®
Spandex	Glospun®, Lycra®, Numa®, Unel®
Triacetate	Arnel®
Vinyon	Avisco®, Clevyl®, Rhovyl®, Thermovyl®, Volpex®

Note 1 – The list of trademarks in 1.2 contains only examples and does not include all brands produced in the United States or abroad and imported for sale in the United States. The list does not include examples of fibers from two (or more) generic classes of polymers spun into a single filament. Additional information on fiber types and trademarks is given in Refs (1, 2, and 3).

1.3 Most manufacturers offer a variety of fiber types of a specific generic class. Differences in tenacity, linear density, bulkiness, or the presence of inert delustrants normally do not interfere with analytic tests, but chemical modifications (for such purposes as increased dyeability with certain dyestuffs) may affect the infrared spectra and some of the physical properties, particularly the melting point. Many generic classes of fibers are sold with a variety of cross-section shapes designed for specific purposes. These differences will be evident upon microscopical examination of the fiber and may interfere with the measurements of refractive indices and birefringence.

1.4 Microscopical examination is indispensable for positive identification of the several types of cellulosic and animal fibers, because the infrared spectra and solubilities will not distinguish between species. Procedures for microscopic identification are published in AATCC Method 20 and in References (4-12).

1.5 Analyses by infrared spectroscopy and solubility relationships are the preferred methods for identifying man-made fibers. The analysis scheme based on solubility is very reliable. The infrared technique is a useful adjunct to the solubility test method. The other methods, especially microscopical examination are generally not suitable for positive identification of most man-made fibers and are useful primarily to support solubility and infrared spectra identifications.

1.6 These test methods include the following sections:

	Section
Scope	1
Referenced Documents	2
Terminology	3
Summary of Test Methods	4
Significance and Use	5
Sampling, Selection, Preparation and Number of Specimens	6
Reference Standards	7
Purity of Reagents	8
Fiber Identification by
Microscopic Examination	9,10
Solubility Relationships	11-16
Infrared Spectroscopy	17-23
Physical Properties to Confirm Identification
Density	24-27
Melting Point	28-33
Birefringence by Difference of	34 and 35
Refractive Indices

1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. See Note 3.