ASTM D276 PDF

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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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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.

Note asttm internal reflection spectroscopy technique is more difficult to use satisfactorily than the KBr disk or c276 techniques and it is not recommended for use except by an operator experienced in the technique. Current edition approved Aug. The other methods, especially microscopical examination are generally not suitable for positive identication of most man-made bers and are useful primarily to support solubility and infrared spectra identications.

The analysis of data will be completed and the precision statement will be included in the test method by the end of the year In order to accomplish this, it is necessary to consider the following: The density gradient column may also be used for separation. 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. Differences in d2766, linear density, bulkiness, or the presence of inert delustrants normally do aztm interfere with analytic tests, but chemical modications for such purposes as increased dyeability with certain dyestuffs may affect the infrared spectra and aztm of the physical properties, particularly the melting point.

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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This standard is not included in any packages. C Varies, always weak, sometimes negative. These differences will be evident upon microscopical examination of the fiber and may interfere with the measurements of refractive indices and birefringence. Test Method 20 for Identication of Fibers in Textiles2 3.

Standard Test Methods for Identification of Fibers in Textiles

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. The analysis scheme based on solubility is very reliable.

Historical Version s – view previous versions of standard.

Dyes, lubricants, and delustrants are not present normally in amounts large enough to interfere with the analyses. For identication, the positions of the peaks according to wavelength or wave number should match those ashm a known reference spectrum Figs.

ASTM D276 – 12

Allowing material to reach its melting point results in permanent fiber change. It is believed that the components of variance of this method are such that ber densities are reproducible to within Interpretation of Ast, 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.

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

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. It is desirable to have available authentic samples of the bers to be identied, and it is essential to have those that are unfamiliar. Originally approved in Active view current version of standard. The extinction bands are sometimes very broad, so that the compensating retardation corresponding to maximum extinction cannot be determined precisely.

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. Your comments are invited either f276 revision of this standard or for additional asfm and should be addressed to ASTM International Headquarters. It is possible for such modications to aztm seriously with the analyses used in these test methods.

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

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

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not astk, either reapproved or withdrawn. The analysis scheme based on solubility is very reliable. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. A number in parentheses indicates the year of last reapproval.

Insoluble specimens may be removed from the solvent, rinsed in distilled water, and used for subsequent analyses, if aastm by limited sample size.

Frequently, several minutes of vigorous effort are required to remove all of the air. Allowing material to reach its melting point results in permanent ber change. Please first verify your email before subscribing to alerts.

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

A selective solvent refer to Table 1 of Test Methods D can be very useful in these cases, if one can be found. These procedures should be carried out in a hood and the laboratory adequately ventilated. The longitudinal and cross-section photographs of the various bers have been omitted since they are published elsewhere and the usefulness for identication is limited. Place the specimen in the sample beam of the instrument and record the spectrum astj scanning from 2.