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ASTM D2402-07(2018)
Standard Test Method for Water Retention of Textile Fibers (Centrifuge Procedure)
Přeložit název
NORMA vydána dne 1.7.2018
Informace o normě:
Označení normy: ASTM D2402-07(2018)
Datum vydání normy: 1.7.2018
Kód zboží: NS-854238
Počet stran: 4
Přibližná hmotnost: 12 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM D2402-07(2018) :
Keywords:
textile fibers, water retention,, ICS Number Code 59.060.01 (Textile fibres in general)
Doplňující informace
| Significance and Use | ||||||||||
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5.1 This test method for testing for water retention of fibers after centrifuging is not recommended for acceptance testing of commercial shipments because the test is more appropriate for development and research. However, if the test is to be used for acceptance testing, comparative tests as described in 5.1.1 are advised. 5.1.1 In the case of a dispute arising from differences in reported test results using Test Method D2402 for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if statistical biases exist between their laboratories. As a minimum, the two parties should take a group of test specimens that are as homogeneous as possible and that are from a lot of material of the type in question. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using the Student's t-test for unpaired data with an acceptable probability level chosen by the two parties while designing the test program. If the analysis shows a bias, its cause must be found and corrected, or the purchaser and supplier must agree to interpret future test data with consideration for the known bias. 5.2 The amount of water retained by a fiber mass increases with an increase in the hydrophilic tendency of the fiber. Thus the data obtained can be used to indicate the following: 5.2.1 Differences in water retention between the various man-made and natural fibers, 5.2.2 Degree of cross-linking in cellulosic fibers, 5.2.3 Damage incurred by wool and silk fibers due to alkaline processing, and 5.2.4 Persistence of water-repellent treatments. |
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| 1. Scope | ||||||||||
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1.1 This test method covers the measurement of water retention of man-made and natural fibers as staple, tow, or filament and spun yarns. It is intended to give a measure of the amount of water which cannot be removed from thoroughly wetted fiber solely by mechanical means as applied by centrifugal force (see 3.2). 1.2 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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| 2. Referenced Documents | ||||||||||
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