ASTM D276 PDF

Methods D – 62 T, Identification of Fibers in Textiles were discontinued in 1 These test methods are under the jurisdiction of ASTM Committee D13 on. ASTM Da() – Designation: D – 00a (Reapproved ) Standard Test Methods for Id. ASTM D – Free download as PDF File .pdf), Text File .txt) or read online for free. Identification of textile fibres.

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These test methods are not recommended for acceptance testing of commercial shipments because of the qualitative nature of the results and because of the limitations previously noted.

Standard Test Methods for Identification of Fibers in Textiles

Hang the wire hook with f276 ee end immersed in mL of displacing liquid Fig. Single-determination density estimates by one operator for one sample of ber from measurements in two different displacing liquids one a mild solvent for the ber, the other a mild swelling agent agreed to e276 0.

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

The precision and bias of the nonstandard quantitative test methods described are strongly influenced by the skill of the operator.

These test methods are not recommended for acceptance testing of commercial shipments because of the qualitative nature of the results and because of the limitations previously noted. Take care that the specimen is immersed completely and that it does not touch the sides of the beaker.

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ASTM D – 00a Standard Test Methods for Identification of Fibers in Textiles

Apparatus, Reagents, and Materials C Varies, always weak, sometimes negative. Determine the refractive indices for plane-polarized light parallel to and perpendicular to the fiber length within 0. The asmt are generally not useful for distinguishing fibers of the same generic class from different manufacturers or for distinguishing different fiber types of the same generic class from one producer.

It is possible for such modifications to interfere seriously with the analyses used in these test methods.

The immersed weight is plotted as a function of time, and the apparent density obtained by extrapolating to zero time. The other methods, especially microscopical examination are generally not suitable for positive identification of most d2766 fibers and are useful primarily to support solubility and infrared spectra identifications. Simultaneously start the time and immerse the specimen in the liquid. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

The last approved version of this historical standard is referenced on www. Considerable experience and diligence of the analyst may be aastm to resolve satisfactorily these difficulties.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved asrm withdrawn. NOTE 2—For statements on d76 and bias of the standard quantitative test methods for determining physical properties for conrmation of ber identication refer to the cited test method. Interpretation of Results In order to accomplish this, it is necessary to consider the following: The specic gravity of each batch must be determined by a pycnometric technique such as Test Method D or Test Method D The list does not include examples of fibers from two or more generic classes of polymers spun into a single filament.

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Signicance and Use 5.

ASTM D – Standard Test Methods for Identification of Fibers in Textiles

The list does not include examples of bers from two or more generic classes of polymers spun into a single lament. Additional information on fiber types and trademarks is given in Refs 1, 2, and 3. Reinstatement as a standard using the previously assigned designation was requested since the listed procedures were reliable and the text was considered to be the best available, though not all-inclusive.

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. The density gradient column may also be used for separation.

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Subscription pricing is determined by: Methods for determining several physical properties and solubility data useful for conrming infrared spectral identications have been included. Many generic classes of fibers are sold with a variety of cross-section shapes designed for specific purposes. NOTE 6—The wire size is critical because of surface phenomena; coarser wire has greater surface area and ner wire exes, causing a greater effective surface.

Dyes, lubricants, and delustrants are not present normally in amounts large enough to interfere with the analyses.