1、Designation:D123914Standard 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 and health practices and determine the applica-bility of regulatory limitations prior
5、 to use.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 PlasticsD6899 Guide for Laboratory Cyclic Corrosion Testing ofAutomotive Painted S
6、teel(Withdrawn 2010)33.Terminology3.1 DefinitionsFor definitions of technical terms pertain-ing to plastics used in this test method,see Terminology D883.4.Significance and Use4.1 This test method is intended to be a rapid empirical testto determine the loss of the plasticizer or other extractableco
7、mponents 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 when the specimen thickness is greater than 0.05 mm(0.002 in.)andthe extr
8、acted weight loss of the specimen exceeds 0.005 g.5.2 ContainersPint jars or cans with a diameter of at least65 mm(2.5 in.)(one container for each specimen).6.Materials6.1 Distilled WaterFreshly prepared distilled or deionizedwater.6.2 Soap Solution(1%)Dissolve 12 g of dehydrated purewhite soap flak
9、es(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 Alcohol(50%)as described in Test Method D543.6.7 Any other standard or suppl
10、ementary 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 chemicalreagent.7.2 Nothing in this test method precludes the use of spec
11、i-mens of other dimensions or the making of other tests on thesame specimens after 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 100 by 25mm(4 by 1 in.)as prescribed in Test Methods D882.For such
12、specimens,use a proportionate amount of chemical and con-tainer of appropriate dimensions so that the specimen can beimmersed in a completely vertical position during the test.The1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommi
13、ttee D20.19 on Film,Sheeting,andMolded Products.Current edition approved May 15,2014.Published June 2014.Originallyapproved in 1952.Last previous edition approved in 2007 as D1239 07.DOI:10.1520/D1239-14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Servi
14、ce at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright AST
15、M International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 amount of chemical used shall be approximately 8 mL/cm2,counting the area of both sides of the specimen.NOTE4Direct comparison of values should not be made betweensamples of different thicknesses,since p
16、ercentage weight loss is a functionof thickness.8.Conditioning8.1 ConditioningConditionthetestspecimensat23 6 2C(73.4 6 3.6F)and 50 6 10%relative humidity fornot less than 40 h prior to test for those tests where condition-ing is required.In cases of disagreement,the tolerances shall be61C(61.8F)and 65%relative humidity.8.1.1 Note that for some hygroscopic materials,such asnylons,the material specifications(for example,SpecificationD6899)call for testing“dry as-molded specimens.”Suchrequirements
