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 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. Active view current version of standard. It is the responsibility of the user of this standard to establish appropriate safety r276 health practices and determine the applicability of regulatory limitations prior to use.

Test Method 20 for Identication of Fibers in Textiles2 3.

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. Signicance and Use 5. Sampling, Selection, Preparation, and Number of Specimens 6. Securely tie the ends of the skein and cut off the free ends. The density gradient column may also be used for separation.

Single-determination density astn by one operator for one sample of ber from measurements in two different displacing liquids one a mild solvent for the ber, the other a mild swelling agent agreed to within 0.

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.

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Fiber density d267 the extrapolated apparent density at zero time. F Staple and fully oriented lament yarns FOYpartially oriented POY and undrawn yarns may have much lower values of birefringence and refractive index. Signicant differences between values reported by different observers are known to occur. Need more than one copy?

The infrared technique is a useful adjunct to the solubility test method. The procedure described here is applicable only to bers that can be obtained in the form of continuous laments.

Methods for determining several physical properties and solubility data useful for conrming infrared spectral identications have been included. Dyes, asmt, and delustrants are not present normally aastm amounts large enough to interfere with aatm analyses. 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 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. Historical Version s – view previous versions of standard. Precision and Bias Many generic classes of fibers are sold with a variety of cross-section shapes designed for specific purposes.

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

Frequently, several minutes of vigorous effort are required to remove all of the air. Note 1—The list of trademarks in 1. Mix astj about mg of powdered KBr and grind in the ball mill for 1 to 2 f276. Numerically, birefringence is the difference between the maximum and minimum refractive indices. Unless otherwise indicated, it is intended that all reagents shall conform to the specications of the Committee on Analytical Reagents of the American Chemical Society, where such specications are available.

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ASTM D276 – 12

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. I p-ethylene oxybenzoate type. The list does not include examples of fibers asrm two or more generic classes of polymers spun into a single filament.

Additional information on sstm types and trademarks is given in References 1, 2, and 3. 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.

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. C Some modarylic bers cannot be distinguished from acrylic bers in this solubility scheme. 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.

The methods have been revised completely, emphasizing infrared spectroscopic techniques for identifying man-made ber types. The infrared technique is a useful adjunct to the solubility test method.