ASTM_D_6287_-_17.pdf

Designation:D628717Standard Practice forCutting Film and Sheeting Test Specimens1This standard is issued under the fixed designation D6287;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.1.Scope*1.1 This practice covers equipment and techniques forcutting film and sheeting specimens for testing.2The speci-mens are nick-free,non-stretched and can be rapidly prepared.1.2 The values given in SI units are to be consideredstandard.The values given in parentheses are for informationonly.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.NOTE1There is no known ISO equivalent to this standard.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:3D882 Test Method for Tensile Properties of Thin PlasticSheetingD2838 Test Method for Shrink Tension and OrientationRelease Stress of Plastic Film and Thin Sheeting(With-drawn 2018)4F88 Test Method for Seal Strength of Flexible BarrierMaterialsF1921/F1921M Test Methods for Hot Seal Strength(HotTack)of Thermoplastic Polymers and Blends Comprisingthe Sealing Surfaces of Flexible WebsF2029 Practices for Making Laboratory Heat Seals forDetermination of Heat Sealability of Flexible BarrierMaterials as Measured by Seal Strength3.Significance and Use3.1 Many test methods including Test Methods D882,D2838,F88,F1921/F1921M,and F2029 require the use ofnarrow strips of varying length.The quality of the samplepreparation directly affects test results.This practice describesthree techniques for preparing samples with straight,clean,parallel edges with no visible imperfections.NOTE2After cutting,each specimen should be examined visually toinsure the edges are undamaged(free of nicks).On a periodic basisspecimen edge quality should be evaluated by microscopic examination.To determine when cutting blades need to be replaced or sharpened,acontrol chart of tensile strength and percent elongation at break(see TestMethod D882)of a uniform material may be maintained.Tensile strengthand percent elongation at break will decrease as the quality of specimencutting decreases.4.Apparatus and Materials4.1 Procedure AA hand rotatable drum cutter(Fig.1)containing a 12.7 cm(5 in.)diameter drum with grooves at12.7 mm(0.5 in.)intervals and a blade holder allowing a bladeto ride in each groove or be raised above the groove.4.2 Procedure BA dual blade shear cutter(Fig.2)withparallelism tolerances within 0.0254 mm(0.001 in.).The cuttercuts individual strips of a particular sample width.4.3 Procedure CDies with replacable razor-blade cuttersare available in many different specimen configurations.Thedies are equipped with a spring-loaded mechanism that allowseasy specimen removal.These dies are mounted on either amanual or pneumatic press and provide easy replacement ofworn cutting elements.4.4 Scissors.4.5 Marker.4.6 Tape.5.Procedure5.1 Procedure A:1This practice is under the jurisdiction ofASTM Committee D20 on Plastics andis the direct responsibility of Subcommittee D20.19 on Film,Sheeting,and MoldedProducts.Current edition approved Dec.15,2017.Published January 2018.Originallyapproved in 1998.Last previous edition approved in 2009 as D6287-09.DOI:10.1520/D6287-17.2This practice does not cover all types of techniques which may be used forcutting film and sheeting specimens.3For 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.4The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 5.1.1 Cut film or sheeting to approximately 30 by 30 cm(12by 12 in.)or desired size within these dimensions.It isrecommended to cut only an individual(single)sheet o