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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NOTE 2—For statements on precision and bias of the standard quantitative test methods for determining physical properties for conrmation of ber identication refer to the cited test method. Please first log in with a verified email before subscribing to alerts.

The list does not include examples of fibers from two or more generic classes of polymers spun into a single filament. The last approved version of this historical standard is s276 on www.

The index of refraction is equal to the ratio of the sine of the angle of the incident ray to the sine of the angle of the refracted ray angles measured from the normal to the common boundary. Add to Alert PDF. Extensive editorial changes have been made throughout the text.

The bers should be watched during the test to determine whether there might be a mixture of ber types, some of which are soluble and some insoluble. Allowing material to reach its melting point results in permanent fiber change.

ASTM D – 12 Standard Test Methods for Identification of Fibers in Textiles

Cast ashm from solution on a rock salt plate using a glass stirring rod and permit the solvent to evaporate. This standard is also available to be included in Standards Subscriptions.

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Fiber density is the extrapolated apparent density at zero time. In order to accomplish this, it is necessary to consider the following: Note 1—The list of trademarks in 1.

ASTM D276 – 12

Many fibers are chemically modified by their producers in various ways so as to alter their properties. A selective solvent refer to Table 1 of Test Methods D can be very useful in these cases, if one can be found.

It is desirable to have available authentic samples of the bers to be identied, and it is essential to have those that are unfamiliar. Need more than one copy? D — 00a Reapproved Standard Test Methods for Identication f276 Fibers in Textiles1 This standard is issued under the xed designation D ; the number immediately following the designation indicates the year adtm original adoption or, in the case of revision, the year of last revision.

Link to Active This link will always route to the current Active version of the standard. Numerically, birefringence is the difference between the maximum and minimum refractive indices. These differences will be evident upon microscopical examination of d2766 fiber and asfm interfere with the measurements astmm refractive indices and birefringence.

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. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. 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 astmm point.

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Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

Standard Test Methods for Identification of Fibers in Textiles

Many of the generic classes of man-made fibers are produced by several manufacturers and sold under various trademark names as follows Note 1: Many of the generic classes of man-made fibers are produced by several manufacturers and sold under various trademark names as follows Note The limited use of the test methods for qualitative identication cannot justify the effort that would be necessary to determine the precision and bias of the techniques.

Many generic classes of bers are sold with a variety of cross-section shapes designed for specic purposes. 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.

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.

The limited use of the test methods for qualitative identification cannot justify the effort that would be necessary to determine the precision and bias of the techniques. Purity of Reagents 8. An alternative test for identication of an unknown ber is by comparison with properly identied bers used as reference standards.

Extensive editorial changes were made in various sections inand the methods were reinstated as D — The list does not include examples of bers from two or more generic classes of polymers spun into a single lament.