ASTM_D_751_-_06_2011.pdf

Designation:D75106(Reapproved 2011)Standard Test Methods forCoated Fabrics1This standard is issued under the fixed designation D751;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.This standard has been approved for use by agencies of the Department of Defense.1.Scope1.1 These test methods cover,but are not limited to,rubber-coated fabrics,that is,tarpaulins,rainwear,and similarproducts.1.2 The scope of each of these test methods appears in thesection in which the test method is described.1.3 The test methods appear in the following sections:Test MethodSectionDimensions and Mass7-10Breaking Strength11Procedure AGrab Test Method12-15Procedure BCut Strip Test Method16Elongation17Bursting Strength18-21Puncture Resistance22-25Tearing Strength26Procedure APendulum Method27Procedure BTongue Tear Method28-31Trapezoidal Tear32-35Hydrostatic Resistance36Procedure AMullen Type Tester37-40Procedure BRising Water Column Tester41-44Adhesion Coating(to Fabrics)45-48Strength of Coating49-53Tack-Tear Resistance54-58Low Temperature Bend Test59Low Temperature Impact Test60Low-Temperature Crack Resistance61-65Seam Strength66-71Accelerated Heat Aging(Oven Method)72-79Dead Load Seam Strength80-83Blocking Resistance at Elevated Temperatures84-88Crush Resistance89-93Wicking of Coated Cloth94-981.4 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.5 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:2D573 Test Method for RubberDeterioration in an AirOvenD1349 Practice for RubberStandard Temperatures forTestingD1424 Test Method for Tearing Strength of Fabrics byFalling-Pendulum(Elmendorf-Type)ApparatusD2136 Test Method for Coated FabricsLow-TemperatureBend TestD2137 Test Methods for Rubber PropertyBrittleness Pointof Flexible Polymers and Coated FabricsD4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustries3.Significance and Use3.1 Coated fabrics and rubber products made from coatedfabrics are important items of commerce,and adequate testmethods must be available to ensure the quality of theseproducts.These test methods provide for this testing capability.4.Standard Conditions4.1 Test ConditionsCoated fabrics shall be tested in anenvironment satisfying the conditions as defined in 4.2 or 4.3unless otherwise specified,or as per agreement betweensupplier and purchaser.When it is known that the coated fabricis to be used in a tropical environment,the atmospheredescribed in 4.3 shall be specified.4.2 Temperate AtmosphereThe standard condition for test-ing coated fabrics shall be that reached by the fabric when inmoisture equilibrium with a standard atmosphere having arelative humidity of 50 6 5%at 23 6 2C(73 6 4F).4.3 Tropical AtmosphereThe standard condition for test-ing coated fabrics shall be that reached by the fabric when inmoisture equilibrium with a standard atmosphere having arelative humidity of 65 6 5%at 27 6 2C(80 6 2F).1These test methods are under the jurisdiction of ASTM Committee D11 onRubber and are the direct responsibility of Subcommittee D11.37 on Coated Fabrics,Rubber Threads and Seals.Current edition approved Nov.1,2011.Published January 2012.Originallyapproved in 1943.Last previous edition approved in 2006 as D751 06.DOI:10.1520/D0751-06R11.2For 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 States1 4.4 Moisture EquilibriumIt shall be considered that mois-ture equilibrium is reached when after free exposure to air inmotion,there is no progressive increase in mass.Moistureequilibrium shall be approached from the dry side(notmoisture-free).Certain coatings may greatly retard moisturepenetration into the fabric;therefore,fabrics coated on bothsides may require 24 h or more to reach equilibrium.5.Time Lapse Between Vulcanization and Testing5.1 For all test purposes,the minimum time between vul-canization and testing should be 16 h.5.2 For nonproduct tests,the maximum time between vul-canization and testing should be four weeks,and for evalua-tions intended to be comparable,the tests,as far as possible,should be carried out after the same time interval.5.3 For product tests,where possible,the time betwee