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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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. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Extensive editorial changes were made in various sections inand the methods were reinstated as D — 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.

It is possible for such modifications to interfere seriously with the analyses used in these test methods. Comparison of the spectra of unknown materials to a proper set of reference spectra of various ber types see 7.

The methods 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. Purity of Reagents 8. NOTE 6—The wire size is critical because of surface phenomena; coarser xstm has greater surface area and ner wire exes, causing a greater effective surface.

Mix with about mg of powdered KBr and grind in the ball mill for 1 to 2 min. In addition to other precautions, do not mix reagents or add reagents to a satm solution except as specically indicated in the scheme in Fig.

Need more than one asrm Link to Active This link will always route to the current Active version of the standard. As the voice of the U. Refer to the tabulation of ber physical properties in Table 1 for this purpose.

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The analysis scheme based on solubility is very reliable.

ASTM D276 – 12

As a general guide, the lms should be cast thin enough to be nearly transparent. Signicant differences between values reported by different observers are known to occur.

Standards Subscriptions from ANSI zstm a money-saving, multi-user solution for accessing standards. Therefore record the time and weight at about 2-min intervals until at least 20 min total time has elapsed. 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. Current edition approved Aug. Determine the refractive indices for plane-polarized light parallel to and perpendicular to the ber length within 0.

Make a small hole on the lid with a needle and close the pan with the help of a sample crimper.

These test methods are a generally reliable means of identifying the generic types of fibers present in a sample of textile material of unknown composition. Additional information on ber types and d76 is given in References 1, 2, and 3. 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.

Identication of the ber f276 class is made by analysis of the ber spectrum using a decision chart Fig. It is possible to make an identication using a sample of less than 10 mg of each type of ber present.

You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. In practice, bers are generally sufficiently opaque that this is not a serious problem, but it should be guarded against, especially when using m-cresol, which has a refractive index 1. Securely tie the ends of the skein and cut off the free ends.

Last previous edition approved in as D — 00a.

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Summary of Test Method 4. The density gradient column may also be used for separation. Apparatus, Reagents, and Materials The infrared technique is a useful adjunct to the solubility test method. The analysis scheme based on solubility is very reliable.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. A number in parentheses indicates the year of last reapproval.

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

Additional information on fiber types and trademarks is given in References 1, 2, and 3. Allowing material to reach its melting point results in permanent ber change.

Take care that the specimen is immersed completely and that it does not aatm the sides of the beaker. The list does not include examples of fibers from two or more generic classes of polymers spun into d26 single filament. F Staple and fully oriented lament yarns FOYpartially oriented D2276 and undrawn yarns may have much lower values of birefringence and refractive index.

X276 list does not include examples of fibers from two or more generic classes of polymers spun into a single filament. Active view current asrm of standard. The methods 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.

The list does not include examples of fibers from two or more generic classes of polymers spun into a single filament. Considerable experience and diligence of the analyst may be necessary to resolve satisfactorily these difficulties. In general the refractive index of a substance varies with the frequency of the radiation It is believed that the components of variance of this method are such that ber densities are reproducible to within Signicance and Use 5.