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ASTM D629-15
Standard Test Methods for Quantitative Analysis of Textiles (Withdrawn 2024)
Automatically translated name:
Standard Test Methods for Quantitative Analysis of Textiles
STANDARD published on 1.2.2015
The information about the standard:
Designation standards: ASTM D629-15
Note: WITHDRAWN
Publication date standards: 1.2.2015
SKU: NS-585744
The number of pages: 21
Approximate weight : 63 g (0.14 lbs)
Country: American technical standard
Category: Technical standards ASTM
The category - similar standards:
Annotation of standard text ASTM D629-15 :
Keywords:
animal fibers (except wool), bast, leaf, and fruit fibers, chemical properties (textiles), cotton, extractable matter, man-made fibers, analysis, moisture content, moisture regain, microscopical analysis, quantitative analysis, silk, textile fibers, wool,, ICS Number Code 59.080.01 (Textiles in general)
Additional information
| Significance and Use | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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5.1 Qualitative and quantitative fiber identification is actively pursued by committee RA24 (Fiber Identification) of AATCC and presented in AATCC Test Methods 20 and 20A. Since precision and bias development is also part of the AATCC test methods, both AATCC and ASTM D13 have agreed that new development will take place in RA24. However, because there is valuable information still present in the ASTM standards, D13.51 has agreed Test MethodsD276 and D629 will be maintained as active standards by ASTM. 5.2 Test Methods D629 for the determination of quantitative analysis of textiles may be used for acceptance testing of commercial shipments but caution is advised since information on between-laboratory precision is lacking. Comparative tests as directed in 5.2.1 or in Standard Tables D1909 may be advisable. 5.2.1 In case of a dispute arising from differences in reported test results using Test Methods D629 for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens which are as homogeneous as possible and which are from a lot of material of the type in question. The test specimen should then be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using Student's 5.3 The effects of the various reagents used in the chemical methods on the residual fibers in a blend depend upon the history of the fibers and, unless otherwise stated, are generally too small or too uncertain to warrant the application of correction factors. 5.4 Fiber composition is generally expressed either on the oven-dry mass of the original sample or the oven-dry mass of the clean fiber after the removal of nonfibrous materials. If nonfibrous materials are not first removed from the textile before the fiber analysis is carried out, or if the treatments described in Section 8 are incapable of removing them, any such materials present will increase the percentage of the fiber constituent with which they are removed during the analysis, assuming they are soluble in the solvent used. 5.5 The analytical methods are intended primarily for the separation of binary mixtures of fibers. These procedures may also be used for the analysis of mixtures containing more than two types of fibers by selecting the best combination of methods to use (Table 1). Since a sequence of solvents on a given fiber may produce different results than the expected results from a single solvent, it is advisable to determine the results of such sequential effects when testing multiple fiber blends. It is sometimes more convenient to separate mechanically the yarns in a textile which are of similar types, and then use the appropriate chemical method to analyze each of the components. Table 2 shows the solubilities of the various fibers in different chemical reagents. Method
No. 1—80 % acetone(cold)
Method No. 2— Method No. 3—90 % formic acid Method No. 4—59.5 % sulfuric acid Method No. 5—70 % sulfuric acid Method No. 6—Sodium hypochlorite solution Method No. 7—Curpammonia solution Method No. 8—Hot xylene Method No. 9—90 % formic acid Method No. 10—N,N-dimethylacetamide S = Soluble
PS = Partially Soluble SS = Slightly Soluble (a correction factor may be applied) I = Insoluble 1.1 These test methods cover procedures
for the determination of the fiber blend composition of mixtures of
the fibers listed in 1.2.
Procedures for quantitative estimation of the amount of moisture
and certain nonfibrous materials in textiles are also described,
for use in the analysis of mixtures, but these are not the primary
methods for the determination of moisture content for commercial
weights.
1.2 These test methods cover procedures for the following fiber types: 1.2.1 Natural Fibers: 1.2.1.1 Cellulose-Base Fibers: Cotton Hemp Flax Ramie 1.2.1.2 Protein-Base Fibers: Animal hairs (other than wool) Silk, cultivated Silk, Tussah Wool 1.2.2 Man-Made Fibers: 1.2.2.1 Cellulose-Base Fibers: Acetate (secondary) Rayon, viscose or cuprammonium Triacetate 1.2.2.2 Synthetic-Base Fibers: Acrylic Aramid Modacrylic Nylon 6, Nylon 6-6, others Olefin Polyester Spandex 1.3 These test methods include the following sections and tables:
1.4 The analytical procedures described in the test methods are applicable to the fibers listed in 1.2. The test methods are not satisfactory for the separation of mixtures containing fibers that fall within the same generic class but differ somewhat, either physically or chemically, from each other. These test methods are not satisfactory for the determination of bicomponent fibers. Note 1: For other methods of analysis covering specific
determinations, refer to: Test Methods D461, Test Method D584, Methods D885, Test Method D1113, Test Method D1334, and Test Method D2130. Methods for moisture are covered
in Methods D885, Test Method
D1576, Test Method
D2462, Test Method
D2495 and Test Methods
D2654. For the determination
of commercial weight, refer to Test Method D2494.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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. |
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