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Description of ASTM-D1448 2011ASTM D1448 - 11Standard Test Method for Micronaire Reading of Cotton FibersActive Standard ASTM D1448 | Developed by Subcommittee: D13.11 Book of Standards Volume: 07.01 ASTM D1448Significance and Use This test method is considered satisfactory for acceptance testing when the levels of the laboratories are controlled by the use of the same reference standard cotton samples because the current estimates of between-laboratory precision are acceptable under these conditions. If there are differences of practical significance between reported test results for two laboratories (or more), comparative tests should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, ensure the test samples to be used are as homogeneous as possible, are drawn from the material from which the disparate test results were obtained, and are randomly assigned in equal numbers to each laboratory for testing. The test from the two laboratories should be compared using a statistical test for unpaired data, at a probability level chosen prior to the testing series. If a bias is found, either its cause must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias. The micronaire reading of cotton fibers is a function of both fineness and maturity and is related to mill processing performance and to the quality of the end products. Factors correlated with micronaire reading include cleaning efficiency, neppiness, and the strength and uniformity of the yarn. Note 2A modification of this test method is used in commercial trading to select bales which will conform to contract guarantees for specified micronaire readings (refer to D5867 ). For this purpose, it is usual practice to test only one specimen per sample. 1. Scope 1.1 This test method covers the determination of the micronaire reading of loose cotton fibers by measuring the resistance of a specific mass (plug) of cotton fibers to air flow under prescribed conditions. Note 1For other methods for determining the fineness of fibers based on the air-flow principle, refer to Test Method D1449 , Test Method for Specific Area and Immaturity Ratio of Cotton Fibers (Arealometer Method), and to Test Method D1282 , Test Method for Resistance to Air Flow as an Indication of Average Fiber Diameter of Wool Top, Card Sliver, and Scoured Wool. 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 and health practices and determine the applicability of regulatory limitations prior to use.
ASTM Standards D123 Terminology Relating to Textiles D1282 Test Method for Resistance to Airflow as an Indication of Average Fiber Diameter of Wool Top, Card Sliver, and Scoured Wool D1441 Practice for Sampling Cotton Fibers for Testing D1449 Method of Test for Specific Area and Immaturity Ratio of Cotton Fibers (Arealometer Method) D1776 Practice for Conditioning and Testing Textiles D5867 Test Methods for Measurement of Physical Properties of Raw Cotton by Cotton Classification Instruments D7139 Terminology for Cotton Fibers Keywords cotton; fineness; micronaire reading; Airflow resistance; Cotton fabrics/fibers; Fineness; Maturity--cotton fibers; Micronaire reading; Yarn number; ICS Code ICS Number Code 59.060.10 (Natural fibres) DOI: 10.1520/D1448-11 ASTM International is a member of CrossRef. ASTM D1448The following editions for this book are also available...This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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