1、Designation:D258221Standard Test Method forPuncture-Propagation Tear Resistance of Plastic Film andThin Sheeting1This standard is issued under the fixed designation D2582;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of la
2、st revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method covers the determinati
3、on of the dy-namic tear resistance of plastic film and thin sheeting subjectedto end-use snagging-type hazards.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety co
4、ncerns,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.NOTE1Film has been arbitrarily defined as sheeting having nominalthic
5、kness not greater than 0.25 mm(0.010 in.).NOTE2There 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 S
6、tandards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD883 Terminology Relating to PlasticsD4000 Classification System for Specifying Plastic Ma
7、teri-alsD5947 Test Methods for Physical Dimensions of SolidPlastics SpecimensD6988 Guide for Determination of Thickness of Plastic FilmTest SpecimensE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 Definitions of Terms Specific to This
8、Standard:3.1.1 slit teara single tear parallel to the direction of thefalling carriage.3.1.2“V”teara tear that has two individual tear legs(notnecessarily of equal length)radiating approximately 645from the point the tear was initiated.4.Significance and Use4.1 The puncture-propagation of tear test
9、measures theresistance of a material to snagging,or more precisely,todynamic puncture and propagation of that puncture resulting ina tear.Failures due to snagging occur in a variety of end uses,including industrial bags,liners,and tarpaulins.The unitsreported in this test method are Newtons(tear res
10、istance).4.2 Experience has shown that for many materials puncturedoes not contribute significantly to the force value determined,due to the sharpness of the propagating probe used.However,comparing the results of prepunctured test specimens withnormal nonpunctured specimens will give an indication
11、of theextent of any puncture resistance in the reported result.4.3 For many materials,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 material
12、specification before using this test method.Table 1 of Classi-fication System D4000 lists the current ASTM materialsstandards.5.Apparatus35.1 As shown in Fig.1,the instrument consists of:1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of
13、Subcommittee D20.19 on Film,Sheeting,andMolded Products.Current edition approved May 1,2021.Published May 2021.Originallyapproved in 1967.Last previous edition approved in 2016 as D2582 16.DOI:10.1520/D2582-21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer
14、 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 Testing Machines,Inc.,2910 Expressway Drive,South,Islandia,NY 11749.Ifanyo
15、ne is aware of alternative suppliers,please provide this information to ASTMInternational Headquarters.Your comments will receive careful consideration at ameeting of the responsible technical committee1,which you may attend.*A Summary of Changes section appears at the end of this standardCopyright
16、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.15.1.1 Carriages of different weight,each with a pointedprobe.Each carriage weight shall
