1、Designation:D258216Standard 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 and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE1Film has been arbitrarily defined as sheeting having nominalthickness not grea
5、ter than 0.25 m(0.010 in.).NOTE2There is no known ISO equivalent to this standard.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD883 Terminology Relating to PlasticsD4000 Classification System for Specifying Plastic Materi-alsD5947 Test Methods for Phys
6、ical 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 Standard:3.1.1 slit teara single te
7、ar 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 measures theresistance of a materia
8、l 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 resistance).4.2 Experience has shown t
9、hat 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 of theextent of any puncture resist
10、ance 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 materialspecification before using this tes
11、t 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:5.1.1 Carriages of different weight,each with a pointedprobe.Each carriage weight shall have a tolerance of 61%ofthe weight desired.5.1.2 A test sta
12、nd including:5.1.2.1 Carriage release mechanism,5.1.2.2 Scale marked in millimetres,1This 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 1,2016.Published
13、 April 2016.Originallyapproved in 1967.Last previous edition approved in 2009 as D2582 09.DOI:10.1520/D2582-16.2For 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 standa
14、rds 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.Ifanyone is aware of alternative suppliers,please provide this information to ASTMInternational Headquart
15、ers.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 ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1
16、 5.1.2.3 Curved specimen holder with a tear slot and fiveclamps,5.1.2.4 Drop base with a guide channel to accommodate thecarriage wheels,and5.1.2.5 Bubble level to level the base.5.2 The standard drop height is 508 mm(20.0 in.);however,it can be varied to suit the desired end-use-rate condition.See10.3 for an alternative method for calculating tear resistancefor heights other than 508 mm.5.3 The probe is a 3.18-mm(0.125-in.)diameter drill rodhaving one end a truncated cone,the short base 0.40 mm