ASTM_D_3813_-_D_3813M_-_98_2012e1.pdf

Designation:D3813/D3813M98(Reapproved 2012)1Standard Test Method forCurling,Twisting,and Tubing on Unwind of Pressure-Sensitive Tapes1This standard is issued under the fixed designation D3813/D3813M;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.1NOTESection 12 was corrected editorially in May 2012.1.Scope1.1 This test method provides one procedure for determin-ing the extent of curling,the degree of twisting,and tendencyto form a tube resulting from unwinding of the tape from itsroll.1.2 The values stated in either SI or inch-pound units are tobe regarded separately as standard.The values stated in eachsystem may not be exact equivalents;therefore,each systemmust be used independently,without combining values in anyway.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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D996 Terminology of Packaging and Distribution Environ-mentsD3715/D3715M Practice for Quality Assurance of Pressure-Sensitive TapesD4332 Practice for Conditioning Containers,Packages,orPackaging Components for TestingE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or Process3.Terminology3.1 DefinitionsGeneral terms used in this test method aredefined in Terminology D996.4.Summary of Test Method4.1 The sample roll of tape is placed on a free-turningspindle a specified distance above a horizontal plane.Astrip oftape is drawn from the roll the distance to the plane at aspecified rate and released.Any subsequent curling,twisting,or tubing of the strip is observed and measured.5.Significance and Use5.1 This test method will provide information on the relativetendency of tapes to curl,twist,or form into a tube withtouching edges.The amount of each is a predictor of thedifficulty one might experience in handling strips of tape of anylength during their application.5.2 There are several causes for variation in the extent ordegree of these characteristics and may vary themselves withina production lot of tape.Therefore,it is essential to use anaccepted sampling plan(see Section 7)when it is desired to usethis test method to compare two types of tape for acceptancesampling purposes.6.Apparatus6.1 Free-Turning Spindle,3sized to fit snugly inside thesample tape core,with its axis firmly supported horizontallyand adjustable in height directly above a horizontal platform.There should be no obstructions in the path between theplatform and the spindle.NOTE1The horizontal platform can be a bench top or the floor.1This test method is under the jurisdiction of ASTM Committee D10 onPackaging and is the direct responsibility of Subcommittee D10.14 on Tape andLabels.Current edition approved April 1,2012.Published May 2012.Originallyapproved in 1979.Last previous edition approved in 2007 as D3813/D3813M 98(2007).DOI:10.1520/D3813_D3813M-98R12E01.2For 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.3The sole source of supply of the apparatus known to the committee at this timeis Chemsultants International,9349 Hamilton Dr.,Mentor,OH 440611118.If youare aware of alternative suppliers,please provide this information to ASTMInternational Headquarters.Your comments will receive careful consideration at ameeting of the responsible technical committee,1which you may attend.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.Sampling7.1 Acceptance SamplingSampling shall be in accordancewith Practice D3715/D3715M.7.2 Sampling for Other PurposesThe sampling and thenumber of test specimens depends on the purpose of thetesting.Practice E122 is recommended.It is common to test atleast five specimens of a particular tape.Test specimens shouldbe taken from several rolls of tape and whenever possible,among several production runs of tape.Strong conclusionsabout a specific property of a tape cannot be based on testresults on a single unit(roll)of a product.8.Test Specimens8.1 The test specimen shall be the strip of tape unwoundfrom the originally wound sample roll during performance inaccordance with Section 10.8.1.1 No restrictions in the width of the sample(or thespecimen)are made except a practical limitation due to thehigh unwind that might result from wide tape rolls.NOTE2This test