ASTM_D_7192_-_10.pdf

Designation:D719210Standard Test Method forHigh Speed Puncture Properties of Plastic Films Using Loadand Displacement Sensors1This standard is issued under the fixed designation D7192;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 test method covers the determination of punctureproperties of plastic films,over a range of test velocities.1.1.1 Test Method D1004 has defined film as having athickness not greater than 0.25 mm.Plastic materials having athickness above this limit are not to be excluded from useunless shown to be rigid(see 3.2.1).Test Method D3763 is therecommended method for instrumented puncture testing ofrigid plastics.1.2 Test data obtained by this test method is relevant andappropriate for use in engineering design.1.3 The values stated in SI units are to be regarded asstandard.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.NOTE1This test method does not closely conform to ISO 7765-2.Theonly similarity between the two tests is that they are both instrumentedimpact tests.The differences in striker,fixture,specimen geometries andin test velocity can produce significantly different test results.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD883 Terminology Relating to PlasticsD1004 Test Method for Tear Resistance(Graves Tear)ofPlastic Film and SheetingD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD3763 Test Method for High Speed Puncture Properties ofPlastics Using Load and Displacement SensorsD4000 Classification System for Specifying Plastic Materi-alsD6988 Guide for Determination of Thickness of Plastic FilmTest Specimens3.Terminology3.1 DefinitionsFor definitions see Terminology D883 andfor abbreviations,see Terminology D1600.3.2 Definitions of Terms Specific to This Standard:3.2.1 rigid,adjany plastic specimen that,when placed onthe support component of the open clamp assembly,does notdeflect into the center of the unsupported region(under its ownweight)by more than 0.05 mm from the horizontal plane of thesupport component.3.2.1.1 DiscussionThis definition is provided as a guide-line to allow testing of soft,pliable plastic materials that arethicker than 0.25 mm.4.Significance and Use4.1 This test method is designed to provide load versusdeformation response of plastic films under essentially multi-axial deformation conditions at impact velocities.This testmethod further provides a measure of the rate sensitivity of theplastic films to impact.4.2 Multi-axial impact response,while partly dependent onthickness,does not necessarily have a linear correlation withspecimen thickness.Therefore,results should be comparedonly for specimens of essentially the same thickness,unlessspecific responses versus thickness formulae have been estab-lished for the plastic films being tested.4.3 For many plastic films,there may be a specification thatrequires the use of this test method,but with some proceduralmodifications that take precedence when adhering to thespecification.Therefore,it is advisable to refer to that materialspecification before using this test method.Table 1 of Classi-fication System D4000 lists the ASTM materials standards thatcurrently exist.4.4 The values obtained by this test method are highlydependent on the method and conditions of film fabrication as1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.19 on Film,Sheeting,andMolded Products.Current edition approved April 1,2010.Published May 2010.Originallyapproved in 2005.Last previous edition approved in 2008 as D7192-08a.DOI:10.1520/D7192-10.2For 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.*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 States1 well as the type and grade of resin.Results can varysignificantly,depending upon sample quality,uniformity offilm gage,die marks,contaminants,and so forth.5.Apparatus5.1 The testing machine shall consist of two assemblies,onefixed and the other driven by a suitable method to achieve therequired impact velocity(that is,hydraulic,pneumatic,mechanical,or gravity):5.1.1 Specimen Clamp AssemblyThis device shall be per-mitted to be variable with respect to the holding of thes