ASTM_D_3786_-_D_3786M_-_13.pdf

Designation:D3786/D3786M13Standard Test Method forBursting Strength of Textile FabricsDiaphragm BurstingStrength Tester Method1This standard is issued under the fixed designation D3786/D3786M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript 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 This test method describes the measurement of theresistance of textile fabrics to bursting using a hydraulic orpneumatic diaphragm bursting tester.This test method isgenerally applicable to a wide variety of textile products.1.2 This test method may also be applicable for stretchwoven and woven industrial fabrics such as inflatable re-straints.1.3 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 equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.NOTE1For the measurement of the bursting strength by means of aball burst mechanism,refer to Test Method D3787.1.4 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:2D123 Terminology Relating to TextilesD1776 Practice for Conditioning and Testing TextilesD3787 Test Method for Bursting Strength of TextilesConstant-Rate-of-Traverse(CRT)Ball Burst TestD4850 Terminology Relating to Fabrics and Fabric TestMethods2.2 Other Standard:TAPPI Method T 403,Bursting Strength of Paper33.Terminology3.1 For all terminology related to D13.59,Fabric TestMethods,see Terminology D4850.3.1.1 The following terms are relevant to this standard:bursting strength,knitted fabric,nonwoven fabric,stretchwoven fabric,woven fabric.3.2 For all other terminology related to textiles,see Termi-nology D123.4.Summary of Test Method4.1 A specimen is clamped over an expandable diaphragm.The diaphragm is expanded by fluid pressure to the point ofspecimen rupture.The difference between the total pressurerequired to rupture the specimen and the pressure required toinflate the diaphragm is reported as the bursting strength.5.Significance and Use5.1 This method for the determination of diaphragm burst-ing strength of knitted,nonwoven and woven fabrics is beingused by the textile industry for the evaluation of a wide varietyof end uses.5.2 In cases where test results obtained using the proceduresin Test Method D3786 have not been correlated with actualperformance,Test Method D3786 is considered satisfactory foracceptance testing of commercial shipments of textile fabricsfor bursting strength since the method has been used exten-sively in the trade for acceptance testing.In cases wheredisagreement arising from differences in values reported by thepurchaser and the supplier when using Test Method D3786 foracceptance testing,the statistical bias,if any,between thelaboratory of the purchaser and the laboratory of the suppliershould be determined with comparison based on testing speci-mens randomly drawn from one sample of material of the typebeing evaluated.1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.59 on Fabric Test Methods,General.Current edition approved Jan.1,2013.Published January 2013.Originallyapproved in 1979.Last previous edition approved in 2012 as D378612.DOI:10.1520/D3786_D3786M-13.2For 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.3Available from Technical Association of the Pulp and Paper Industry(TAPPI),15 Technology Parkway South,Norcross,GA 30092,http:/www.tappi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NOTE2The kind of load transfer and stretch that occur when knittedgoods and nonwoven fabrics are worn are prevented by clamping them asdescribed in this method.6.Apparatus and Materials6.1 Inflated Diaphragm Bursting Tester4 A testing ma-chine that meets the requirements of 6.1.1-6.1.4.Mounted so asto be free of externally induced vibrations.6.1.1 Clamps,for firmly and uniformly securing the testspecimen between two annular,parallel,and durable surfaces,without slippage during the test.Use sufficient pressure toeffect the practicable minimization of slippage.The upper andlower clamping surfaces shall have a circular coaxial apertureo