ASTM_D_1776_-_D_1776M_-_16.pdf

Designation:D1776/D1776M16Standard Practice forConditioning and Testing Textiles1This standard is issued under the fixed designation D1776/D1776M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This practice covers the conditioning and testing oftextiles when conditioning is specified in a test method.Because prior exposure of textiles to high or low humidity mayaffect moisture pick-up equilibrium,a procedure also is givenfor preconditioning the material when required.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD618 Practice for Conditioning Plastics for TestingD885 Test Methods for Tire Cords,Tire Cord Fabrics,andIndustrial Filament Yarns Made from ManufacturedOrganic-Base FibersD4920 Terminology Relating to Conditioning,Chemical,and Thermal PropertiesD5867 Test Methods for Measurement of Physical Proper-ties of Raw Cotton by Cotton Classification InstrumentsD7269 Test Methods for Tensile Testing of Aramid YarnsD7744 Test Methods for Tensile Testing of High Perfor-mance Polyethylene TapesE337 Test Method for Measuring Humidity with a Psy-chrometer(the Measurement of Wet-and Dry-Bulb Tem-peratures)2.2 ISO Standard:ISO 139 Textiles StandardAtmosphere for Conditioning andTesting33.Terminology3.1 For terminology related to conditioning see Terminol-ogy D4920.3.2 The following terms are relevant to this standard:acceleratedconditioning,moisturecontent,moistureequilibrium,moisture equilibrium for preconditioning,mois-ture equilibrium for testing,precondition,standard atmospherefor preconditioning textiles,standard atmosphere for testingtextiles,uncertainty of(in)measurement.3.3 For definitions of other textile terms used in thisstandard see Terminology D123.4.Summary of Practice4.1 Samples or specimens requiring preconditioning arebrought to relatively low moisture content in a specifiedatmosphere.Samples or specimens not requiring pre-conditioning are brought to moisture equilibrium(specific tofiber-content)according to the standard atmospheres for testingtextiles as shown in Table 1.4.2 Understanding of tolerance and uncertainty of measure-ment has evolved since the creation of the original version ofthis standard.Due to this new understanding,uncertainty ofmeasurement has been taken into account in determiningacceptable tolerances for the standard atmospheres for testingtextiles as shown in Table 1.5.Significance and Use5.1 The conditioning prescribed in this practice is designedto obtain reproducible results on textiles and textile products.Results of tests obtained on these materials under uncontrolledatmospheres may not be comparable with each other.In1This practice is under the jurisdiction ofASTM Committee D13 on Textiles andis the direct responsibility of Subcommittee D13.51 on Conditioning,Chemical andThermal Properties.Current edition approved Jan.1,2016.Published January 2016.Originallyapproved in 1960.Last previous edition approved in 2015 as D177615.DOI:10.1520/D1776_D1776M-16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer tot he standards Document summary page onthe ASTM website.3Available from American National Standards Institute,11 W.42nd Street,13thFloor,New York,NY 10036.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 general,many of the physical properties of textiles and textileproducts are influenced by relative humidity and temperature ina manner that affects the results of the tests.To make reliablecomparisons among different textile materials and products,and among different laboratories,it is necessary that standardatmospheres be utilized during conditioning and testing.5.2 The documentation of standard atmospheres for precon-ditioning(if necessary),conditioning,testing settings andtolerances,including the determination of the uncertainty ofmeasurement of temperature and relative humidity recordingdevices,may be necessary for laboratory accreditation