1、Designation:D123922Standard Test Method forResistance of Plastic Films to Extraction by Chemicals1This standard is issued under the fixed designation D1239;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A n
2、umber 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 for resistance of plastic films tochemicals covers the measurement of the weight loss of filmafter immersion in chemicals.
3、NOTE1There is no known ISO equivalent to this standard.NOTE2Film is defined as sheeting having nominal thickness notgreater than 0.25 mm(0.010 in.),in accordance with Terminology D883.1.2 The values stated in SI units are to be regarded asstandard.The values stated in other units are nominal valuesg
4、iven for information only.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 lim
5、itations prior to use.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
6、 TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D543 Practices for Evaluating the Resistance of Plastics toChemical ReagentsD882 Test Method for Tensile Properties of Thin PlasticSheetingD883 Terminology Relating to PlasticsD1600 Terminology forAbbreviated Terms R
7、elating to Plas-tics3.Terminology3.1 DefinitionsFor definitions of technical terms pertain-ing to plastics used in this test method,refer to TerminologyD883.For abbreviations used in this test method,refer toTerminology D1600.4.Significance and Use4.1 This test method is intended to be a rapid empir
8、ical testto determine the loss of the plasticizer or other extractablecomponents from the plastic film when immersed in liquidscommonly used in households.5.Apparatus5.1 BalanceAn analytical balance,capable of weighing to0.0001 g.NOTE3An analytical balance capable of weighing to 0.001 g can beused w
9、hen the specimen thickness is greater than 0.05 mm(0.002 in.)andthe extracted weight loss of the specimen exceeds 0.005 g.5.2 ContainersContainer with a diameter of at least 65mm(2.5 in.)and a minimum volume to hold one specimen.6.Materials6.1 Distilled WaterFreshly prepared distilled or deionizedwa
10、ter.6.2 Soap Solution(1%)Dissolve 12 g of dehydrated purewhite soap flakes(dried for 1 h at 105C)in 1200 mL ofdistilled water.This is sufficient solution to test three speci-mens.6.3 Cottonseed OilHousehold cooking grade.6.4 Mineral Oil,USPHeavy grade,sp gr 0.875 to 0.905.6.5 Kerosine.6.6 Ethyl Alco
11、hol(50%),as described in Test MethodD543.6.7 Any other standard or supplementary reagent listed inTest Method D543.7.Test Specimen7.1 The test specimens for plastic films shall be in the formof squares 50 6 0.25 mm(2 in.)on each side.At least threespecimens of each sample shall be tested with each c
12、hemicalreagent.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 May 1,2022.Published May 2022.Originallyapproved in 1952.Last previous edition approved in
13、2014 as D1239 14.DOI:10.1520/D1239-22.2For 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 sectio
14、n 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 Princi
15、ples for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.17.2 Nothing in this test method precludes the use of speci-mens of other dimensions or the making of other tests on thesame specimens after
16、they have been exposed to the chemicals.Another acceptable specimen is a disk 50 6 0.25 mm(2 in.)indiameter(total area 41.5 cm2),or a tension specimen at least50 mm(2 in.)longer than the grip separation as prescribed inTest Methods D882.7.3 A nominal tension specimen,uniform in width andthickness,shall not be less than 5.0 mm(0.20 in.)or greaterthan 25.4 mm(1.0 in.)in width.7.4 For such specimens,use a proportionate amount ofchemical and container of appropriate dimensions so that thespecimen ca