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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D — 00a FIG. A number in parentheses indicates the year of last reapproval. This standard is also available to be included in Standards Subscriptions. 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.
ASTM D – 00a Standard Test Methods for Identification of Fibers in Textiles
Already Subscribed to this document. These differences will be evident upon microscopical examination of the fiber and may interfere with the measurements of refractive indices and birefringence.
It is desirable to have available authentic samples of the bers to be identied, and it is essential to have those that are unfamiliar. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C Varies, always weak, sometimes negative. In such cases it may be impractical to separate the bers mechanically. 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.
ASTM D276 – 12
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 procedure described here is applicable only to bers that can be obtained in the form of continuous laments.
The methods have been revised completely, emphasizing infrared spectroscopic techniques for identifying man-made ber types. The limited use of the r276 methods for qualitative identication cannot justify the effort that would be necessary to determine the precision and bias of the techniques. The list does not include examples of bers from two or more generic classes of polymers spun into a single lament.
Describe the material s or product s sampled and the method of sampling used. F Staple and fully oriented lament yarns FOYpartially oriented POY and undrawn yarns may have much lower values of birefringence and refractive index. 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.
A selective solvent refer to Table 1 of Test Methods D can be very useful in these cases, if one can be found. Additional information on ber types and trademarks is given in References 1, 2, and 3. Many generic classes of fibers are sold with a d2276 of cross-section shapes designed for specific purposes.
Determine the refractive indices for plane-polarized light parallel to and perpendicular to the ber length within 0. Sampling, Selection, Preparation, and Number of Specimens 6. The precision and bias of the nonstandard quantitative test methods described are strongly influenced by the skill of the operator. In addition to other precautions, do not mix reagents or add reagents to a ber solution except as specically indicated in the scheme in Fig. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Extrapolate the straight-line portion back to zero time, if possible. Comparison of the spectra of unknown materials to a proper set of reference spectra of various ber types see 7.
Standard Test Methods for Identification of Fibers in Textiles
Many generic classes of fibers are sold with a variety of cross-section shapes designed for specific purposes.
Cast lms from solution on a rock salt plate using a glass stirring rod and permit the solvent to evaporate. Axtm 1—The list of trademarks in 1. NOTE 2—For statements on precision and bias of the standard quantitative test methods for determining physical properties for conrmation of ber identication refer to the cited test method.
ASTM D – 12 Standard Test Methods for Identification of Fibers in Textiles
The index of refraction is equal to the ratio of the sine adtm 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. Additional information on fiber types and trademarks is given in Refs 1, 2, and 3.
The immersed weight is plotted as a function of time, and the apparent density obtained by extrapolating to zero time. Link to Active This link will always route to the current Active version of the standard. Many generic classes of fibers are sold with a variety of cross-section shapes designed for specific purposes. The s276 technique is a useful adjunct to the solubility test method.