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 differences will be evident upon microscopical examination of the fiber and may interfere with the measurements of 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.

Signicance and Use 5. 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. Many generic classes of fibers are sold with a variety of cross-section shapes designed for specific purposes. Subscription pricing is determined by: 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.

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

For identication purposes these values should be regarded as indicating only the relative values of the properties. 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.

ASTM D276 – 12

D2276 longitudinal and cross-section photographs of the various bers have been omitted since they are published elsewhere and the usefulness for identication is limited. Test Method 20 for Identication of Fibers in Textiles2 3.

Link to Sstm This link will always route to the current Active version of the standard. 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.

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The analysis scheme based on solubility is very reliable. We have no amendments or corrections for this standard.

Identication of the ber generic class is made by analysis of the ber spectrum using a decision chart Fig. Refer to the tabulation of ber physical properties in Table 1 for this purpose. Determine the refractive indices for plane-polarized light parallel to and perpendicular to the ber length within 0. Asmt test methods are a generally reliable means of identifying the generic types of fibers present in a sample of d27 material of unknown composition.

ASTM D – 00a 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 Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Please first log in with a verified email before subscribing to alerts. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

D — 00a Reapproved Standard Test Methods for Identication of Fibers in Textiles1 This standard is issued under the xed designation D ; the number immediately following the designation indicates the year of original adoption or, in r276 case of revision, the year of last revision.

The infrared technique is a useful adjunct to the solubility test method.

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

The method is often very difficult, and many of the phenomena observed when viewing bers with polarized light are subject to misinterpretation. Using a stirring rod, vigorously agitate aztm sample to remove occluded air.

The other methods, especially microscopical satm are generally not suitable for positive identification of most man-made fibers and are useful primarily to support solubility and infrared spectra identifications. Considerable experience and diligence of the analyst may be necessary to resolve satisfactorily these difficulties. Many generic classes of fibers are sold with a variety of cross-section shapes designed for specific purposes.

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Need more than one copy? Extensive editorial changes have been made throughout the text. The infrared technique is a useful adjunct to the solubility test method. Note The list of trademarks in does not include all brands produced in the United States or abroad and imported for sale in the United States. Extensive editorial changes were made in various sections inand the methods were reinstated as D — Many fibers are chemically modified by their producers in various ways so as to alter their properties.

The analysis scheme based on solubility is very reliable.

Make a small hole on the lid with a needle and close the pan with the help of a sample crimper. You may delete a document from your Alert Profile at any time. Many generic classes of bers are sold with a variety of cross-section shapes designed for specic purposes. As the voice of the U. Record the weight of the wire hook, H, to the nearest 0. Simultaneously start the time and immerse the specimen in the liquid. The extinction bands are sometimes very broad, so that the compensating retardation corresponding to maximum extinction cannot be determined precisely.

Cast lms from solution on a rock salt plate using a glass stirring rod and permit the solvent to evaporate. The methods are generally not useful for distinguishing bers of the same generic class from different manufacturers or for distinguishing different ber types of the same generic class from one producer.

The infrared technique is a useful adjunct to the solubility test method. 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.