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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ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. ASTM D – 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 the document is revised or amended, you will be notified by email.

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

The precision and bias of the nonstandard quantitative test methods described are strongly influenced by the skill of the operator. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. NOTE 4—With the exception of the test to distinguish silk and wool and the melting of Saran, all of the decision points of the scheme Fig.

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any time by the responsible technical committee and must be reviewed every ve years and if not revised, either asym or withdrawn. 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. Considerable experience and diligence of the analyst may be necessary to resolve satisfactorily these difficulties.

The analysis scheme based on solubility is very reliable.

ASTM D276 – 12

Note 2—For statements on precision and bias of the standard quantitative test methods for determining physical properties for confirmation of fiber identification refer to the cited test method. Wstm standard is also available to be included in Standards Subscriptions.

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The analysis of data will be completed and the precision statement will be included in the test method by the end of the year It is possible to make an identication using a sample of less than 10 mg of each type of ber present.

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. Note 5—The internal reflection spectroscopy technique is more difficult to use satisfactorily than the KBr disk or film techniques and it is not recommended for use except by an operator experienced in the technique. The immersed weight is plotted as a function of time, and the apparent density obtained by extrapolating to zero time.

Transfer the ground mixture to a KBr-disk die and astj at approximately 14 MPa psi pressure for 2 to 5 min. Using a stirring rod, vigorously agitate the sample to remove occluded air. These differences will be evident upon microscopical examination of the fiber and may interfere with the measurements of refractive indices and birefringence.

Determine the refractive indices for plane-polarized light parallel to and d26 to the fiber length within 0. Simultaneously start the time and immerse the specimen in the liquid. Other techniques such as, microscopical examination or comparison of physical properties are used to conrm the identication or to distinguish between those ber classes anidex, aramid, asbestos, uorocarbon, glass, and novoloid which are not dissolved by any of the reagents used in this scheme.

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. Test Method 20 for Identication of Fibers in Textiles2 3. Many generic classes of fibers are sold with a variety of cross-section shapes designed for specific purposes. Place the specimen in the sample beam of the instrument and record the spectrum while scanning from 2.

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

Mix with about mg of powdered KBr and grind in the ball mill for 1 to 2 min. Methods for determining several physical properties and solubility data useful for conrming infrared spectral identications have been included. These differences will be evident upon microscopical examination of the fiber and may interfere with the measurements of refractive indices and birefringence.

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Signicance and Use 5. It is possible for such modifications to interfere seriously with the analyses used in these test methods.

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 zstm the normal to the common boundary.

Standard Test Methods for Identification of Fibers in Textiles

Several measurements of immersed weight are made over a period of time, until the weight becomes constant or changes very slowly. The other methods, especially microscopical examination are generally not suitable for positive identification of most man-made fibers and are atsm primarily to support solubility and infrared spectra identifications. The methods are generally not useful for distinguishing fibers of the same generic class from different manufacturers or for distinguishing different fiber d267 of the same generic class from one producer.

Need more than one copy? The list does not include examples of fibers from two or more generic classes of polymers spun into a single filament.

Purity of Reagents 8. Other techniques such as, microscopical examination or comparison of physical properties are used to confirm the identification or to distinguish between those fiber classes anidex, aramid, asbestos, fluorocarbon, glass, and novoloid which are not dissolved by any of the reagents used in this scheme.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. If you feel that your comments have not received d2766 fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.

Considerable experience and diligence of the analyst may be necessary to resolve satisfactorily these difficulties.