1、Designation:F11982(Reapproved 2015)Standard Test Method forRate of Grease Penetration of Flexible Barrier Materials(Rapid Method)1This standard is issued under the fixed designation F119;the number immediately following the designation indicates the year of originaladoption or,in the case of revisio
2、n,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()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.Scope1.1 This test method provides
3、standard conditions for deter-mining the rate of grease penetration of flexible barriermaterials.Pinholes,which can be measured by a separate test,will increase the rate of grease penetration as determined bythis test method.1.2 The values stated in SI units are to be regarded asstandard.The values
4、given in parentheses are for informationonly.1.3 This standard does not purport to address the safetyconcerns associated with its use.It is the responsibility of theuser of this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions pr
5、ior to use.2.Referenced Documents2.1 ASTM Standards:2D374 Test Methods for Thickness of Solid Electrical Insu-lation(Withdrawn 2013)3D618 Practice for Conditioning Plastics for TestingD1898 Practice for Sampling of Plastics(Withdrawn 1998)32.2 TAPPI Standard:TAPPI T465 sm-52 Creasing of Paper for Wa
6、ter VaporPermeability Tests43.Summary of Test Method3.1 Flexible barrier materials,uncreased or creased by astandard procedure,are exposed on one side to grease con-tained in a weighted cotton patch.The time required to show avisual change caused by wetting(reduction in light scattering)of a ground-
7、glass back-up plate is measured.4.Significance and Use4.1 This test method is valuable in the development andselection of flexible barrier materials suited for use as greasebarriers.4.2 The test is rapid in comparison with other methodsbecause of the extremely small quantity of oil required fordetec
8、tion(about 6 g).The actual time to failure is a multipleof the values obtained by this test method.When permeation isthrough an absorbent structure such as kraft paper coated withpolyethylene,the failure times will be longer and variable,depending on the variation in porosity and thickness of thestr
9、ucture.5.Apparatus5.1 Backing Plates,ground-glass,50 by 50 by 3-mm(2 by2 by18-in.),very fine grind on one side only.NOTE1The ground-glass backing plates may be prepared from 2 by2-in.squares of18-in.plate glass by lightly grinding the surface with asilicon carbide abrasive as follows:Place a piece o
10、f plate glass approxi-mately 1ft square on a flat surface.Mix some abrasive and water in smallquantities to make a fairly uniform paste.Place one of the 2-in.squares ofplate glass face down in the abrasive paste,and rotate it in a figure eightmovement with the finger tips using the slightest amount
11、of pressure.When the paste gets too heavy,remove the plate glass square from the bedand wash it to remove all traces of abrasive.Add more water to the thickabrasive paste on the bed.(If necessary,add small amounts of abrasive.)Continue the process until a uniform and light overall etch is present on
12、the face of the square.When a uniform etch has been obtained,wash thesquare thoroughly to remove all traces of abrasive and pat dry with lenstissue.5.2 Weights,50-g,20 mm(0.75 in.)in diameter at the base.5.3 Patches,rifle cleaning,cotton flannel.5.4 Medicine dropper.5.5 Forced-Circulation Oven,desig
13、ned to maintain a testtemperature of 40 or 60C within 61C.1This test method is under the jurisdiction ofASTM Committee F02 on FlexibleBarrier Packaging and is the direct responsibility of Subcommittee F02.10 onPermeation.Current edition approved June 1,2015.Published September 2015.Originallyapprove
14、d in 1970.Last previous edition approved in 2008 as F119 82(2008).DOI:10.1520/F0119-82R15.2For 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
15、page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Technical Association of the Pulp and Paper Industry(TAPPI),15 Technology Parkway South,Norcross,GA 30092,http:/www.tappi.org.Copyright ASTM International,100 Barr Harbor Drive
16、,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.6 Creasing Surface,consisting of a flat rectangular plate(for example,a piece of machined metal plate about 10 mmthick or a piece of plate glass)with a width at least 75 mm(3in.)on all sides.5.7 Creasing Platen,consisting of a 5.5-kg(12-lb)squaremetal bar with 65-mm(2.5-in.)sides and a flat base.NOTE2The developers of this method believe that a standard creaseis easier to obtain with a flat platen than with a roller.The weight of thep