1、Designation: D 3732 82 (Reapproved 2005)Standard Practice forReporting Cure Times of Ultraviolet-Cured Coatings1This standard is issued under the fixed designation D 3732; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、 last 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 practice applies to all coatin
3、gs cured by ultravioletenergy.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.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 t
4、his 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:2D 658 Test Method for Abrasion Resistance of OrganicCoatings by Air Blast Abrasive3D 968 Test Methods for Abrasion Res
5、istance of OrganicCoatings by Falling AbrasiveD 1474 Test Methods for Indentation Hardness of OrganicCoatingsD 2197 Test Methods for Adhesion of Organic Coatings byScrape AdhesionD 2336 Guide for Specifying Factory Applied Wood Coat-ingsD 2793 Test Method for Block Resistance of Organic Coat-ings on
6、 Wood Panel SubstratesD 2794 Test Method for Resistance of Organic Coatings tothe Effects of Rapid Deformation (Impact)D 3023 Practice for Determination of Resistance ofFactory-Applied Coatings on Wood Products to Stains andReagentsD 3281 Test Method for Formability of Attached OrganicCoatings with
7、Impact-Wedge Bend Apparatus3D 3359 Test Methods for Measuring Adhesion by Tape TestD 3363 Test Method for Film Hardness by Pencil Test3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 cure, nthe condition of a coating after conversion tothe final state of cure as measured by tes
8、ts generally related toend-use performance and mutually agreeable to supplier andpurchaser.3.1.2 ultraviolet curing, nconversion of a coating from itsapplication state to its final use state by means of a mechanisminitiated by ultraviolet radiation generated by equipment de-signed for that purpose.4
9、. Significance and Use4.1 This practice provides a guide whereby all pertinentvariables relating to the ultraviolet cure of a coating aredescribed.5. Procedure5.1 Apply the coating to be cured to the desired substrate ata film thickness typical to that normally used. After approxi-mately the time de
10、lay encountered in production pass thecoated substrate through the curing equipment and subse-quently test for cure, as defined in 3.1.1, using the appropriatemethods listed in 5.1.1 through 5.1.11. The most commonlyused test methods are listed in 5.1.1 through 5.1.4.5.1.1 Impact ResistanceTest Meth
11、od D 2794.5.1.2 Film HardnessTest Method D 3363.5.1.3 Solvent Rub TestHold a pad of cheesecloth or othercloth saturated with an agreed-upon solvent, usually methylethyl ketone, over two adjacent fingers using a protectivecovering. Rub the wet pad back and forth across a 100-mmportion of the cured fi
12、lm using vigorous pressure, one forwardand one backward movement constituting one double rub. Takethe end point as the number of double rubs required to softenor penetrate the film. Fully cured films are normally required toresist a specified number of rubs and the result of the test isgiven as exce
13、eding the limit or failing the test.1This practice is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.55 on Factory Applied Coatings on Preformed Products.Current edition approved May 15, 2005.
14、 Published June 2005. Originallyapproved in 1978. Last previous edition approved in 2001 as D 3732 82 (2001).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 sta
15、ndards Document Summary page onthe ASTM website.3Withdrawn.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.1.4 SandabilityUltraviolet cured fillers are usuallyjudged by their sandability with an agreed-upon grit of paper.This test
16、is often made immediately after the material leavesthe ultraviolet processor.5.1.5 Specifying PropertiesGuide D 2336.5.1.6 Abrasion ResistanceTest Methods D 658 andD 968.5.1.7 Indentation HardnessTest Methods D 1474.5.1.8 AdhesionTest Methods D 2197 and D 3359.5.1.9 Block ResistanceTest Method D 279
17、3.5.1.10 FormabilityTest Method D 3281.5.1.11 Stain and Reagent ResistancePractice D 3023.5.2 Repeat the application, curing, and testing with freshmaterial on fresh substrates until the shortest time that yields acured film is obtained.6. Report6.1 Ultraviolet curing equipment is available with sev
18、eraldesign variables. Therefore, include the following informationwith results where applicable:6.1.1 Number of bulbs,6.1.2 Bulb type (intensity, spectral distribution, composi-tion),6.1.3 Bulb age,6.1.4 Bulb location (height from work and orientation toworkpiece),6.1.5 Reflector design,6.1.6 Convey
19、or speed or exposure time to achieve cure,6.1.7 Substrate,6.1.8 Coating identification and age of sample if known,6.1.9 Wet film thickness,6.1.10 Temperature conditions in the curing unit,6.1.11 Curing environment (air, nitrogen, or other atmo-sphere),6.1.12 Cure tests used (refer to Section 5), and
20、6.1.13 Age of cured film when tests were run.7. Keywords7.1 cure time; ultraviolet-cured coatingsASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determi
21、nation 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 technical committee and must be reviewed every five years andif not revised, either reapproved or wi
22、thdrawn. 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 consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that y
23、our 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 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).D 3732 82 (2005)2
