ASTM_D_4963_-_D_4963M_-_22.pdf

Designation:D4963/D4963M22Standard Test Method forIgnition Loss of Glass Fiber Strands and Fabrics1This standard is issued under the fixed designation D4963/D4963M;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.1.Scope1.1 This test method covers primarily the determination ofignition loss of glass fiber textiles.This method applies to glassfiber strands,twisted or untwisted,coated or uncoated;andfabrics,woven,nonwoven,knitted,coated,and uncoated,andchopped strand.This procedure may be applied to other glasstextiles where the amount of organic content obtained byignition loss is required.NOTE1This test method may be used with other glass fiberclassifications,such as C or D,but a different ignition temperature andexposure time may be required.In these cases the manufacturer should beconsulted for the appropriate ignition conditions.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system are not necessarily exact equivalents;therefore,toensure conformance with the standard,each system shall beused independently of the other,and values from the twosystems shall not be combined.1.3 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.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD578 Specification for Glass Fiber StrandsD7018 Terminology Relating to Glass Fiber and Its Products3.Terminology3.1 DefinitionsFor all terminology related to Subcommit-tee D13.18 on Glass Fibers,see Terminology D7018.3.2 For definitions of other textile terms used in this testmethod,refer to Terminology D123.For information on thedesignation of construction of glass strands,refer to Specifi-cation D578.4.Summary of Test Method4.1 The organic content on glass fiber textiles is determinedby weighing the specimen before and after ignition.Theamount of ignition loss on a sample is reported as a percentageof the total mass before ignition.5.Significance and Use5.1 This test method is considered satisfactory for accep-tance testing of commercial shipments because current esti-mates of between-laboratory precision are acceptable.5.1.1 In cases of a dispute arising from differences inreported test results when using this test method for acceptancetesting of commercial shipments,the purchaser and the sup-plier should conduct comparative tests to determine if there isa statistical bias between their laboratories.Competent statis-tical assistance is recommended for the investigation of bias.As a minimum,the two parties should take a group of testspecimens which are as homogeneous as possible and whichare from a lot of material of the type in question.The testspecimens should then be randomly assigned in equal numbersto each laboratory for testing.The average results from the twolaboratories should be compared using Students t-test forunpaired data and an acceptable probability level chosen by thetwo parties before the testing begins.If a bias is found,eitherits cause must be found and corrected or the purchaser and thesupplier must agree to interpret future test results in the view ofthe known bias.5.2 Glass fiber textiles are provided with various sizings orcoatings.These provide a protection for the individual fibers,yarns,or fabric that may compose the glass fiber textile as wellas compatibility with further finishing requirements.Theamount of sizing or coating on glass fiber textiles as deter-mined by this procedure is used for process control.1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.18 on Glass Fiber and itsProducts.Current edition approved June 1,2022.Published July 2022.Originally approvedin 1989.Last previous edition approved in 2011 as D4963 11 which waswithdrawn in January 2020 and reinstated in June 2022.DOI:10.1520/D4963_D4963-22.2For 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 19428-295