1、Designation: F 925 02 (Reapproved 2008)Standard Test Method forResistance to Chemicals of Resilient Flooring1This standard is issued under the fixed designation F 925; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of las
2、t revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This test method provides a procedure f
3、or determiningthe resistance of resilient floor covering to surface deteriorationwhen exposed to various chemical reagents. This test method isnot intended as a staining test nor as a method to judge surfaceand appearance restoration of the sample after exposure to thechemical reagent.1.2 The values
4、 stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation 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-pri
5、ate safety and health practices and determine the applica-bility of regulatory limitations prior to use. Specific hazardinformation is provided in Section 5 of this test method.2. Referenced Documents2.1 ASTM Standards:2D 2244 Practice for Calculation of Color Tolerances andColor Differences from In
6、strumentally Measured ColorCoordinatesF 142 Test Method for Indentation of Resilient Floor Tiles(McBurney Test)3F 386 Test Method for Thickness of Resilient FlooringMaterials Having Flat SurfacesF 1914 Test Methods for Short-Term Indentation and Re-sidual Indentation of Resilient Floor Covering3. Si
7、gnificance and Use3.1 Resilient flooring products are designed and formulatedto have good resistance to most common chemicals encoun-tered in typical use. High performance wear layers can also beused to enhance cleanability and chemical resistance. Resilientflooring used in residential and commercia
8、l environments maybe subjected to a variety of chemicals through accidentalspillage or as ingredients used for hygienic purposes. Perfor-mance is dependent upon the flooring formulation and that ofthe maintenance products used on the flooring. This testmethod provides a means of estimating the relat
9、ive suscepti-bility of resilient floor covering to change when exposed tochemical reagents.4. Apparatus4.1 Gloves, impervious vinyl or rubber,4.2 Tweezers, or forceps,4.3 Medicine Dropper, 3 in. straight glass with rubber bulbor pipette having a point opening diameter not less than116 in.(1.6 mm) or
10、 greater than564 in. (1.8 mm),4.4 White Facial Tissue.4.5 Watch Glass.4.6 Timer.4.7 Filter Paper.4.8 Small Laboratory Spatula, approximately14 12 in.-wide blade, rounded bottom, not sharpened,4.9 Suitable Spectrophotometer or Colorimeter, with aminimum14 in. (6.35 mm) diameter opening having a coolw
11、hite fluorescent (CWF) or daylight (D-65) light source, orboth, that measures color in CIE L*, a*, b* using CIE 10standard observer and specular included (see Test MethodD 2244).4.10 Indentation Tester, see Test Methods F 142 andF 1914.4.11 Thickness Tester, see Test Method F 386.4.12 Conditioning R
12、oom or Cabinet, equipped with auto-matic temperature and humidity controls that will maintain73.4 6 3.6F (23 6 2C) and 50 6 5 % relative humidity.5. Hazards5.1 A new medicine dropper or pipette should be used foreach test reagent. If the same reagent dispenser apparatus is tobe reused, it shall be t
13、horoughly cleaned in hot soapy water andalcohol, or both, prior to applying each different test reagent.5.2 Check to be sure the colorimeter is properly warmed upand calibrated prior to use.5.3 Be sure specimens are held flat when measuring color.1This test method is under the jurisdiction ofASTM Co
14、mmittee F06 on ResilientFloor Coverings and is the direct responsibility of Subcommittee F06.30 on TestMethods - Performance.Current edition approved Jan. 1, 2008. Published March 2008. Originallyapproved in 1985. Last previous edition approved in 2002 as F 92502.2For referenced ASTM standards, visi
15、t 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.3Withdrawn.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken,
16、PA 19428-2959, United States.5.4 Be sure each specimen is marked in the corner on theback for easy identification.5.5 Dispose of chemical test reagents properly. Refer toMaterial Safety Data Sheets (MSDS) or precautions on thelabel for proper disposal. (WarningObserve all necessaryprecautions when h
17、andling test reagents known to be flam-mable or potentially hazardous.)6. Test Specimen6.1 The specimen shall consist of a portion of the test unit atleast 6 by 6 in. (153.4 by 153.4 mm) for each reagent(chemical) to be tested.6.2 Specimens shall be selected with minimal changes insurface texture.6.
18、3 Specimens should be of a color to show potential effectof reagent.7. Procedure7.1 Unless otherwise specified, condition the specimens andthe test reagents (chemicals) for at least 24 h prior to testing.The environment for conditioning and testing is 73.4 6 3.6F(23 6 2C) and 50 6 5 % relative humid
19、ity.7.2 Lay the specimens face up on a firm, flat surface.7.3 Select a test area on the specimen having the flattest areaand color appropriate to show the effect of the reagent anddraw a square approximately 112 by 112 in. (38 by 38 mm)centered on that desired test location.7.4 If using test equipme
20、nt such as an indentation tester,thickness tester or color spectrophotometer to help quantifyspecimen change, take initial readings on the unexposedspecimen and record values as indicated in Fig. 1. All mea-surements should be taken on a relatively flat spot, correspond-ing as closely as possible to
21、 the center of the test square.7.5 When evaluating multiple product samples for resis-tance to chemicals, test in stages to permit sufficient time forcleaning and observing panels. Record results on Fig. 2.7.6 For testing liquid reagents, center a piece of filter paperwithin the test square, using a
22、 medicine dropper or pipette,deposit 68 drops of test reagent or a sufficient amount tothoroughly wet the filter paper.7.7 If the test reagent is a paste, apply a thin layer(approximately116 in. (1.6 mm) thick) directly to the test area.Use a spatula or other convenient means.7.8 Place a watch glass
23、 cover over the reagent and allow thetest reagent to remain in contact with the test area for 60 6 1min.7.9 Remove filter paper with tweezers. Blot (do not rub)residual liquid with a dry facial tissue. For paste reagents,lightly scrape surface with the spatula to remove reagent andwipe area with dry
24、 facial tissue. Particular care must be takenduring scraping and blotting so as not to disturb the exposedsurface more than necessary.7.10 If residual reagent remains on the surface, lightly cleanthe exposed area with water or mild solvent, such as isopro-panol or odorless mineral spirits, then blot
25、 dry with facialtissue.NOTE 1Some solvents are flammable and can soften the surface layer,or both. If a question arises as to which are suitable, direct them to themanufacturer.7.11 When thickness, indentation, and colorimetric data areto be measured readings, they should be taken within 15 minafter
26、 removing test reagents and recorded as indicated in Fig. 1.8. Interpretation of Results8.1 Within 5 min after removing test reagents, visuallyexamine the exposed test area as compared to the adjacent,untested area of similar color and texture.8.2 Subjective category ratings will all utilize the sam
27、e scaleof03with0=nochange; 1 = slight change; 2 = moderatechange; and 3 = severe change. The following categoriesshould be rated:8.2.1 Surface DullingIndicating that the specimen suf-fered from a loss of gloss,8.2.2 Color ChangeIndicating that the specimen suffereddiscoloration or bleaching, or both
28、, and8.2.3 Surface AttackIndicating that the specimen sufferedsurface damage such as softening, warping, swelling, blister-ing, peeling, raised or rough area.8.3 If more than a slight change is noted, reevaluate samplein 24 h. If the sample is still rated as more than a slight change,apply two coats
29、 of high quality crosslinked acrylic polish permanufacturers recommendations and rate again 1 h afterapplying final coat of polish. The 24 h rating is optional but canbe useful in determining if the affected area shows a temporaryor permanent change as a result of the reagent exposure.Overall thickn
30、ess, mils Indentation, mils Color; L, a, b Sample:DifferenceafterexposureDifference24 h afterexposureDifferenceafterexposureDifference24 h afterexposureInitial After exposureReagent Initial Initial LabLabDE Comments12345678910AverageFIG. 1 Resistance to Chemicals Measurement FormF 925 02 (2008)28.4
31、This test method recognizes that there are methods topotentially help quantify chemical attack on tile and noncush-ioned products. One can consider using change in thickness tomeasure product swell or indentation to indicate softening, inaddition to the visual rating system. However, these methodsan
32、d results can be misleading where there is only small changedue to reagent exposure and there is danger that repeatedresults could well be within the reporting error of the testmethod.8.5 For this reason we include the methodology for report-ing results, but advise attempting to quantify only whench
33、anges are considered to be more than a slight change.8.6 Thickness ChangeReport percentage change frominitial thickness (positive for swell, negative for shrinkage).Use an average of three tests utilizing Test Method F 386.8.7 IndentationReport indentation value of test area ver-sus unexposed test a
34、rea. Use an average of three tests using the1 min time test interval utilizing Test Method F 142.8.8 Color ChangeReport as DE using Test MethodD 2244.9. Precision and Bias9.1 This test method is subjective and test results arenonnumeric. No statement is made about either the precision orthe bias sin
35、ce the results are to be used for comparative testing.10. Keywords10.1 chemicals; flooring; resilient; resistanceAPPENDIX(Nonmandatory Information)X1. TEST REAGENTSX1.1 Suggested Test ReagentsWhite vinegar (5 % acetic acid)Rubbing alcohol (70 % isopropyl alcohol base)White mineral oil (medicinal gra
36、de)NaOH solution (5 %)HCl (hydrochloric acid) solution (5 %)H2SO4(sulfuric acid) solution (5 %)Household ammonia solution (5 % NH4OH)Household bleach (5.25 % NaOCl)Disinfectantphenol type (5 % active phenol)KeroseneOlive oilUnleaded gasolineASTM International takes no position respecting the validit
37、y of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject
38、 to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarter
39、s. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard i
40、s copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).03 Ratings Sample:ReagentSurfaceAttackColorChangeSurfaceDullingAverage Comments12345678910AverageFIG. 2 Subjective Resistance to Chemicals Evaluation FormF 925 02 (2008)3
copyright@ 2008-2019 麦多课文库（www.mydoc123.com）网站版权所有
备案/许可证编号：苏ICP备17064731号-1