ASTM D7395-2018 red 1875 Standard Test Method for Cone Plate Viscosity at a 500 s-1 Shear Rate.pdf
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1、Designation: D7395 07 (Reapproved 2012)D7395 18Standard Test Method forCone/Plate Viscosity at a 500 s-1 Shear Rate1This standard is issued under the fixed designation D7395; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、 of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope Scope*1.1 This test method covers the determination of the viscosity of paints and related products using a cone/plat
3、e viscometer ata shear rate of 500 s-1.1.2 Viscosity values obtained by this method may be used as an alternative to results from No. 4 Ford cup measurements. Thevalues from this method do not replicate Ford cup results, but can be used for quality control, producer-user specifications andviscosity
4、reduction in the same manner that Ford cups are used.1.3 If viscosity at a higher shear rate is needed, Test Method D4287, which describes viscosity measurement at 10 000 s-1 to12 000 s-1 may be used.1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are
5、included in this The valuesgiven in parentheses are provided for information only and are not considered standard.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate s
6、afety safety, health, and healthenvironmental practices and determine theapplicability of regulatory limitations prior to use.1.6 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Dev
7、elopment of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D3925 Practice for Sampling Liquid Paints and Related Pigmented CoatingsD4287 Test Method for High-Shear Viscos
8、ity Using a Cone/Plate Viscometer3. Summary of Test Method3.1 The material to be tested is placed between the cone and plate of a cone/plate viscometer set at 25C, a solvent trap islowered, and the specimen is subjected to a shear rate of 500 s-1 while the viscosity is measured.4. Significance and U
9、se4.1 This test has been used to measure viscosities of automotive topcoats in place of No. 4 Ford cup measurements and hasprovided an equivalent ability to evaluate whether the paint meets specifications and is sprayable.4.2 The method could be considered as an alternative to No. 4 Ford cup and oth
10、er efflux cup measurements for other productsas well.4.3 The type of viscometer described in this method gives better temperature control than Ford and other efflux cups and isexpected to give better precision.4.4 This test method is suitable for all paints and related materials whether they are New
11、tonian in behavior or not.1 This test method is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.24 on Physical Properties of Liquid Paints r/min (rpm); slower rotation speeds may require longe
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