ASTM_D_5446_-_08_2019.pdf

Designation:D544608(Reapproved 2019)Standard Practice forDetermining Physical Properties of Fabrics,Yarns,andSewing Thread Used in Inflatable Restraints1This standard is issued under the fixed designation D5446;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number 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 is a listing of the test methods commonlyemployed in determining the physical properties of fabrics andyarns used in the manufacture of inflatable restraints.1.2 Fabrics used in the manufacture of inflatable restraintsmay be coated or uncoated,and may be comprised of spunyarns,continuous filament yarns,or a combination thereof.1.3 Fabrics used in the manufacturer of inflatable restraintsmay be either flat or one piece woven.For the one-piecewoven,follow the sampling section of D5446 and the indi-vidual test method.1.4 In Section 9,this practice lists is alphabetical order theprocedures associated with conducting physical testing of thefollowing fabric or yarn properties of concern to the design andmanufacture of inflatable restraints.YarnSectionDenier(Yarn Number)9.3.1Fiber Content9.3.2Finish(Extractable Material)9.3.3Strength and Elongation9.3.4Twist9.3.5FabricAir Permeability9.3.6Abrasion Resistance9.3.7Blocking9.3.8Bow and Skew9.3.9Breaking Force&Elongation9.3.10Burst Strength9.3.11Coating Adhesion9.3.12Coating Weight9.3.13Count of Woven Fabric9.3.14Dynamic Air Permeability9.3.28Edgecomb Resistance9.3.29Flammability9.3.15Fogging(Volatility)9.3.16Length9.3.17Mass per Unit Area9.3.18Non-Fibrous Material9.3.19Odor9.3.20Packability9.3.30pH9.3.21Stiffness9.3.22Tear Strength9.3.23Thickness9.3.24Warp Size Content&Residual Sizing9.3.25Width9.3.26Sewing Thread9.3.271.5 This practice may be used in conjunction with PracticeD5427 which prescribes standard practices for the acceleratedaging of inflatable restraint fabrics when comparative results ofphysical properties before and after accelerated aging arerequired.1.6 Procedures and apparatus other than those stated in thispractice may be used by agreement of purchaser and supplierwith the specific deviations from the standard practice ac-knowledged in the report.1.7 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system are not exact equivalents;therefore,each systemmust be used independent of the other.1.8 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.SEENote 3.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD204 Test Methods for Sewing ThreadsD276 Test Methods for Identification of Fibers in TextilesD737 Test Method for Air Permeability of Textile FabricsD751 Test Methods for Coated FabricsD1059 Test Method for Yarn Number Based on Short-Length SpecimensD1388 Test Method for Stiffness of FabricsD1422/D1422M Test Method for Twist in Single SpunYarnsby the Untwist-Retwist Method1This practice is under the jurisdiction ofASTM Committee D13 on Textiles andis the direct responsibility of Subcommittee D13.20 on Inflatable Restraints.Current edition approved Jan.1,2019.Published January 2019.Originallyapproved in 1993.Last previous edition approved in 2013 as D5446 08(2013).DOI:10.1520/D5446-08R19.2For 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 to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance 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.1 D1423 Test Method for Twist in Yarns by Direct-CountingD1424 Test Method for Tearing Strength of Fabrics byFalling-Pendulum(Elmendorf-Type)ApparatusD1777 Test Method for Thickness of Textile MaterialsD1907 Test Method for Linear Density of Yarn(Yarn Num-ber)by the Skein MethodD2256 Test Method for Tensile Properties of Yarns by theSingle-Strand MethodD2257 Test Method for Extractable Matter in TextilesD2261 Test Method for Tearing Strength of Fabrics by theTongue(Single Rip)Procedure(Constant-Rate-of-Extension Tensile Testing Machine)D3773 Test Methods for Length of Woven FabricD3774 Test Method for Width of Textile FabricD3775 Test Method for End(Warp)and Pick(Fillin