Designation:D5446−08(Reapproved2019)StandardPracticeforDeterminingPhysicalPropertiesofFabrics,Yarns,andSewingThreadUsedinInflatableRestraints1ThisstandardisissuedunderthefixeddesignationD5446;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticeisalistingofthetestmethodscommonlyemployedindeterminingthephysicalpropertiesoffabricsandyarnsusedinthemanufactureofinflatablerestraints.1.2Fabricsusedinthemanufactureofinflatablerestraintsmaybecoatedoruncoated,andmaybecomprisedofspunyarns,continuousfilamentyarns,oracombinationthereof.1.3Fabricsusedinthemanufacturerofinflatablerestraintsmaybeeitherflatoronepiecewoven.Fortheone-piecewoven,followthesamplingsectionofD5446andtheindi-vidualtestmethod.1.4InSection9,thispracticelistsisalphabeticalordertheproceduresassociatedwithconductingphysicaltestingofthefollowingfabricoryarnpropertiesofconcerntothedesignandmanufactureofinflatablerestraints.YarnSectionDenier(YarnNumber)9.3.1FiberContent9.3.2Finish(ExtractableMaterial)9.3.3StrengthandElongation9.3.4Twist9.3.5FabricAirPermeability9.3.6AbrasionResistance9.3.7Blocking9.3.8BowandSkew9.3.9BreakingForce&Elongation9.3.10BurstStrength9.3.11CoatingAdhesion9.3.12CoatingWeight9.3.13CountofWovenFabric9.3.14DynamicAirPermeability9.3.28EdgecombResistance9.3.29Flammability9.3.15Fogging(Volatility)9.3.16Length9.3.17MassperUnitArea9.3.18Non-FibrousMaterial9.3.19Odor9.3.20Packability9.3.30pH9.3.21Stiffness9.3.22TearStrength9.3.23Thickness9.3.24WarpSizeContent&ResidualSizing9.3.25Width9.3.26SewingThread9.3.271.5ThispracticemaybeusedinconjunctionwithPracticeD5427whichprescribesstandardpracticesfortheacceleratedagingofinflatablerestraintfabricswhencomparativeresultsofphysicalpropertiesbeforeandafteracceleratedagingarerequired.1.6Proceduresandapparatusotherthanthosestatedinthis...
