ASTM D1776 D1776M-2015 Standard Practice for Conditioning and Testing Textiles《纺织品的调节和试验标准实践规程》.pdf
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1、Designation: D1776/D1776M 15Standard 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 numbe
2、r in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers the conditioning and testing oftextiles when conditioning is specified in a test method.Because prior exposure of texti
3、les 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 equivale
4、nts; 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 th
5、is 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 Cord
6、s, 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 T
7、ensile 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 andTestin
8、g33. Terminology3.1 For terminology related to conditioning see Terminol-ogy D4920.3.2 The following terms are relevant to this standard:accelerated conditioning, moisture content, moistureequilibrium, moisture equilibrium for preconditioning, mois-ture equilibrium for testing, precondition, standar
9、d 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 lo
10、w moisture content in a specifiedatmosphere. Samples or specimen not requiring pre-conditioning are brought to moisture equilibrium (specific tofiber-content) according to the standard atmosphere for testingtextiles as shown in Table 1.4.2 Understanding of tolerance and uncertainty of measure-ment h
11、as 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 atmosphere for testingtextiles as shown in Table 1.5. Significance and Use5.1 The condition
12、ing 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. Ingeneral, many of the physical properties of textiles and textileproducts are
13、influenced by relative humidity and temperature ina manner that affects the results of the tests. To make reliable1This practice is under the jurisdiction ofASTM Committee D13 on Textiles andis the direct responsibility of Subcommittee D13.51 on Conditioning, Chemical andThermal Properties.Current e
14、dition approved Feb. 1, 2015. Published March 2015. Originallyapproved in 1998. Last previous edition approved in 2008 as D1776081. DOI:10.1520/D1776_D1776M-15.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of
15、 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 19428-295
16、9. United States1comparisons 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
17、settings andtolerances including the determination of the uncertainty ofmeasurement of temperature and relative humidity recordingdevices may be necessary for laboratory accreditation. SeeAppendix X1.6. Apparatus6.1 Conditioning Room or Chamber, consisting of:6.1.1 Equipment for the generation of he
18、ated or cooled air,moisture, and air circulation with control devices to maintainstandard atmospheres for testing textiles throughout a labora-tory space, room or chamber within the tolerances given inTable 1.NOTE 1Temperature and relative humidity recording devices used ina testing laboratory are s
19、eparate ones from those cited in 6.1.16.2 Psychrometer, Ventilated by Aspiration, or a similarmeasuring device, which is accurate to 61C 62F, forchecking the recorded relative humidity, as directed in TestMethod E337.6.3 Preconditioning Cabinet, Room, or Space, equipped formaintaining the standard a
20、tmosphere for preconditioning.6.4 Balance, having a sensitivity of one part in 1000 of themass of the specimen.6.5 Multiple Shelf Conditioning Rack,4,5for spreading outsamples and specimens. See Fig. 1.7. Preparation of Test Apparatus and Calibration7.1 Verify the uncertainty of measurement of the t
21、empera-ture and relative humidity devices being used to producestandard atmospheres and those recording temperature andrelative humidity in laboratories as this factor should beincluded in the tolerances prescribed in Table 1. It is recom-mended that devices with the smallest uncertainty of measure-
22、ment be used. See Appendix X1 and Bibliography.7.2 Set-up procedures for the preconditioning and condi-tioning room or chamber from different manufacturers mayvary. Prepare and verify calibration of the temperature andrelative humidity recording devices as directed in the manu-facturers instructions
23、.7.3 Verify calibration of the temperature and relative hu-midity recording devices in the testing room as directed in theequipment manufacturers instructions.4Drawings of the passive conditioning rack may be obtained from the AmericanAssociation of Chemists and Colorists, P. O. Box 12215, Research
24、Triangle Park,NC 27709-2215.5A suitable rapid conditioning system may be constructed in the laboratory. See“Earnest, D. W., Advancements in USDA Cotton Classing Facilities, Proceedings1996, Beltwide Cotton Conferences, pp. 16511654,” and “Knowiton, J. I., andAlldredge, R. K., A New Method for Accele
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