1、Designation:D144112(Reapproved 2020)Standard Practice forSampling Cotton Fibers for Testing1This standard is issued under the fixed designation D1441;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number
2、in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers procedures for taking a lot sampleof cotton fibers,from a designated source(lot),and reducingthe lot sample through a series
3、of steps to produce testspecimens that are representative of the source and suitable forthe determination of fiber properties according to establishedprocedures.1.2 This practice has been used extensively for commercialacceptance testing of cotton fibers as well as for arbitrationtesting and researc
4、h.NOTE1This practice is used in taking samples of cotton for testing byTest Methods D1440,D1442,D1445,D1447,D1448,D1464,D2480,D2812,D5866 and D5867.1.3 The procedures do not cover the selection of samples forthe determination of moisture.Special handling and protectionof the sample from the prevaili
5、ng atmosphere required forsamples taken for the determination of moisture are notprovided for in this practice.See Test Method D2495.1.4 The values stated in SI units are to be regarded asstandard.No other units of measure are included in thisstandard.1.5 This standard does not purport to address al
6、l of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in acc
7、or-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM S
8、tandards:2D123 Terminology Relating to TextilesD1440 Test Method for Length and Length Distribution ofCotton Fibers(Array Method)D1442 Test Method for Maturity of Cotton Fibers(SodiumHydroxide Swelling and Polarized Light Procedures)D1445 Test Method for Breaking Strength and Elongation ofCotton Fib
9、ers(Flat Bundle Method)D1447 Test Method for Length and Length Uniformity ofCotton Fibers by Photoelectric MeasurementD1448 Test Method for Micronaire Reading of Cotton Fi-bers(Withdrawn 2020)3D1464 Practice for Differential Dyeing Behavior of CottonD1776 Practice for Conditioning and Testing Textil
10、esD2480 Test Method for Maturity Index and Linear Densityof Cotton Fibers by the Causticaire Method(Withdrawn1992)3D2495 Test Method for Moisture in Cotton by Oven-DryingD2812 Test Method for Non-Lint Content of CottonD5866 Test Method for Neps in Cotton FibersD5867 Test Methods for Measurement of P
11、hysical Proper-ties of Raw Cotton by Cotton Classification InstrumentsD7139 Terminology for Cotton Fibers3.Terminology3.1 For all terminology relating to D13.11,Cotton Fibers,refer to Terminology D7139.3.1.1 The following terms are relevant to this standard:laboratory sample,lot,in acceptance sampli
12、ng of cotton,lotsample,in cotton,and specimen.3.2 For all other terminology related to textiles,refer toTerminology D123.1This practice is under the jurisdiction ofASTM Committee D13 on Textiles andis the direct responsibility of Subcommittee D13.11 on Cotton Fibers.Current edition approved July 1,2
13、020.Published July 2020.Originally approvedin 1952.Last previous edition approved in 2012 as D1441 12.DOI:10.1520/D1441-12R20.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refe
14、r to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in acc
15、ordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.4.Summary of Practice4.1 Sampling
16、procedures for obtaining samples from the lotand for the reduction of the lot samples to the size required forfiber test specimens are presented.Steps are outlined to securereduction of the amount of cotton fibers to be handled atvarious stages,so that the reduced sample continues to berepresentative of the lot.Provision is made for the omission ofintermediate steps in the reduction of the lot sample in caseswhere this is desirable or necessary(see 13.1).5.Significance and Use5.1 The reliability
