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    ASTM D6736-2001 Standard Test Method for Burnish Resistance of Latex Paints《试验方法》.pdf

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    ASTM D6736-2001 Standard Test Method for Burnish Resistance of Latex Paints《试验方法》.pdf

    1、Designation: D 6736 01Standard Test Method forBurnish Resistance of Latex Paints1This standard is issued under the fixed designation D 6736; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in par

    2、entheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers a procedure for measuring theresistance of latex paints to burnishing under dry conditions.1.2 This standard does not purpo

    3、rt 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 to use.2. Referenced Documents2.1 ASTM Standards:D 523

    4、 Test Method for Specular Gloss2D 2486 Test Methods for Scrub Resistance of Wall Paints3D 3924 Specification for Standard Environment for Condi-tioning and Testing Paint, Varnish, Lacquer, and RelatedMaterials23. Terminology3.1 Definition:3.1.1 burnish resistancethe ability of a coating to resist an

    5、increase in its gloss (sheen) value after polishing or rubbing.4. Summary of Test Method4.1 Test paints are drawn down lengthwise on plastic panelsusing a 0.18-mm (7.0-mil) applicator and allowed to air-dry forone week. Gloss readings are taken at three equally spacedpoints, lengthwise along the cen

    6、ter of the panel. The panel isthen rubbed for 20 cycles on a scrub machine, after which glossreadings are again taken along the same path abraded by thescrub machine. The initial values are averaged and the finalvalues are averaged. The difference between the initial andfinal gloss readings, divided

    7、 by the initial reading times 100 isa quantitative indication of the paints resistance to burnishing.Higher percentage increases denote poorer resistance andvice-versa.5. Significance and Use5.1 Interior flat paints may become burnished in areas whereclothing or upholstered furniture rub against a w

    8、all. Thisrubbing may cause a smoother, glossier surface at the contactedarea, depending on the level or type of pigments in the paintand binder hardness. This method permits a more quantitativeestimate of burnish resistance than those using manual rubbingtechniques.6. Apparatus6.1 Constant temperatu

    9、re/humidity room 23 6 2C (73.5 63.5F); 50 6 5 % relative humidity (standard conditions,Specification D 3924).6.2 Washability Machine (Scrub Machine), described in TestMethods D 2486.6.2.1 Accessory Apparatus:6.2.1.1 Sandpaper Attachment, total weight 454 g.6.2.1.2 Glass Plate, measured to fit.6.2.1.

    10、3 Gasket Frame and Clamps.6.3 Large Vacuum Plate.6.4 Film Caster, having a 0.18-mm (7.0-mil) clearance.6.5 Glossmeter(s), capable of measuring 60 and 85 glossin accordance with Test Method D 523.7. Materials7.1 Plastic Scrub Panels, 43.5 mm 3 16.5 mm (17 in. 3 6.5in.), white or black.7.2 Cheesecloth

    11、, 4-ply, medium weave.48. Procedure8.1 Application and Evaluation of Test Paints:8.1.1 Attach a plastic panel to the vacuum plate and drawdown the test paint uniformly lengthwise, using the 0.18-mm(7.0-mil) side of the applicator.8.1.2 Condition the panels for one week in the constanttemperature / h

    12、umidity room or under other conditions agreedupon between the buyer and seller.8.1.3 Take three equally spaced gloss readings (Test MethodD 523) along the center length of the panel, making sure theareas of the readings are within the travel path of the scrubmachine attachment. The resulting average

    13、 of the three read-ings is used as the initial value prior to rubbing the panel. It issuggested that the gloss readings should be as follows:1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings, Materials, and Applications and is the direct responsibility of

    14、Subcommittee D01.42 on Architectural Coatings.Current edition approved Dec. 10, 2001. Published February 2002.2Annual Book of ASTM Standards, Vol 06.01.3Annual Book of ASTM Standards, Vol 06.02.4Bleached cheesecloth, grade 20B, 24/20 (medium) weave, available from deRoyal Textiles, Camden, SC, was u

    15、sed in developing this method.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Semi-Gloss Paints 60Sheen Paints 60 and 85Flat Paints 85In general, if the 60 reading drops below 20 units the 85reading should be recorded.8.1.4 Secure on

    16、e layer of 4-ply cheesecloth lengthwise inthe sandpaper attachment of the scrub machine.8.1.5 Secure the panel on the scrub machine over the glassplate using the gasket and clamps. Attach the sandpaperattachment to the scrub machine. Start the machine.8.1.6 Abrade the panel for 20 reciprocating cycl

    17、es. Stop themachine.8.1.7 Remove the panel from the scrub machine and care-fully clean off any loose pigment from the panel. Re-read thepanel, again taking three equally spaced gloss readings alongpath of the burnished area. Average the values and use thisaverage as the final after burnishing value.

    18、9. Report9.1 Report the following information:9.1.1 The application clearance, if different than thosespecified in this test method.9.1.2 The drying time and conditions used, if different thanthose specified in this test method.9.1.3 The number of cycles used in abrading the panels, ifdifferent than

    19、 the number specified in this test method.9.1.4 The gloss angles used and the initial and final glossunits.9.1.5 The total weight the sandpaper attachment used in thetest.9.1.6 The percent increase in gloss calculated by subtractingthe initial average reading from the final average reading,dividing

    20、by the initial reading, and multiplying by 100.10. Precision and Bias10.1 PrecisionTo be determined.10.2 BiasStatement to be added.11. Keywords11.1 abrasion resistance; burnish resistance; polishingASTM International takes no position respecting the validity of any patent rights asserted in connecti

    21、on 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 to revision at any time by the responsible

    22、 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 Headquarters. Your comments will receive careful consi

    23、deration 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 is copyrighted by ASTM International, 100 Ba

    24、rr 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).D 67362


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