ASTM_D_3787_-_15.pdf

Designation:D378715Standard Test Method forBursting Strength of TextilesConstant-Rate-of-Traverse(CRT)Ball Burst Test1This standard is issued under the fixed designation D3787;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 U.S.Department of Defense.1.Scope1.1 This test method describes the measurement for burstingstrength with a ball burst strength tester of textiles or garmentsthat exhibit a high degree of ultimate elongation.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as the standard.Within the test,the inch-pound units are shown in parentheses.The valuesstated in each system are not exact equivalents;therefore,eachsystem may be used independently of the other.Combiningvalues from the two systems may result in nonconformancewithin the specification.NOTE1For the measurement of bursting strength with a hydraulictesting machine,refer to Test Method D3786.NOTE2Constant Rate of Traverse(CRT)machines and Constant Rateof Extension(CRE)machines have been shown to provide differentresults.When using a CRE device,refer to Test Method D6797.1.3 This standard may involve hazardous materials,opera-tions and equipment.This standard does not purport to addressall of the safety concerns,if any,associated with its use.It isthe responsibility of the user of this standard to establishappropriate safety and health practices and determine theapplicability of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D76 Specification for Tensile Testing Machines for TextilesD123 Terminology Relating to TextilesD1776 Practice for Conditioning and Testing TextilesD3786 Test Method for Bursting Strength of TextileFabricsDiaphragm Bursting Strength Tester MethodD4850 Terminology Relating to Fabrics and Fabric TestMethodsD6797 Test Method for Bursting Strength of FabricsConstant-Rate-of-Extension(CRE)Ball Burst Test3.Terminology3.1 For all terminology relating to D13.59,Fabric TestMethods,General,refer to Terminology D4850.3.1.1 The following terms are relevant to this standard:bursting strength,constantrate-of-traverse(CRT)tensile test-ing machine,fabric,knitted,fabric,nonwoven.3.2 For all other terminology related to textiles,refer toTerminology D123.4.Summary of Test Method4.1 A specimen is securely clamped without tension be-tween grooved,circular plates of the ball burst attachmentsecured to the pulling(movable)jaw for the constant-rate-of-traverse(CRT)testing machine.A force is exerted against thespecimen by a polished,hardened steel ball that is attached tothe pendulum-actuating(fixed)clamp of the machine,untilrupture occurs.5.Significance and Use5.1 This test method for the determination of ball burstingstrength of textiles is being used by the textile industry for theevaluation of a wide variety of fabrics.5.2 Test results obtained using the procedures in TestMethod D3787 have not been correlated with actual perfor-mance.Test Method D3787 is considered satisfactory foracceptance testing of commercial shipments of textiles fabricsfor bursting strength since the method has been used exten-sively in the trade for acceptance testing.In cases of disagree-ment arising from differences in values reported by thepurchaser and the seller when using Test Method D3787 foracceptance testing,the statistical bias,if any,between thelaboratory of the purchaser and the laboratory of the sellershould be determined with comparison based on testing speci-mens randomly drawn from one sample of material of the typebeing evaluated.NOTE3The kind force transfer and strength that occur when knittedgoods are worn is prevented by clamping them as directed in this testmethod.1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsibility of D13.59 on Fabric Test Methods,General.Current edition approved July 1,2015.Published August 2015.Originallyapproved in 2001.Last previous edition approved in 2011 as D378707(2011).DOI:10.1520/D3787-15.2For 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 5.2.1 If there are differences of practical significance be-tween reported test results for two(or more)laboratories,comparative tests should be performed to determine if there isa statistical bias between them.The test samples used shouldbe:as homogeneous as possible,drawn from the material fromwhich the disparate test results were obtained,and randomlyassigned in equal nu