Designation: D1084 - 08 Standard Test Methods for Viscosity of Adhesives1 This standard is issued under the fixed designation D1084; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. Anumber in parentheses indicates the year of last reapproval.A superscript epsilon (e) 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. Scope 2.2 ISO Document:3 1.1 These test methods cover the determination of the ISO2555Plastics Resins in the Liquid State or as Emulsions or Dispersions Determination of Apparent viscosity of free-flowing adhesives. 1.1.1 The limitation of this test method to self-leveling Viscosity by theBrookfield Test Method adhesives eliminates thixotropic and plastic materials whose 3. Terminology viscosity is a function of the rate of stirring and previous history of the adhesive. 3.1 Definitions: 1.2 The values stated in SI units are to be regarded as the 3.1.1 Many terms in these test methods are defined in standard.The values in parentheses are for information only. Terminology D907. 3.1.2 viscosity, nof a liquid, the resistance to flow ex- 1.3 This standard does not purport to address all of the pressed as the ratio of the applied stress to the resulting rate of safety concerns, if any, associated with its use. It is the shearing strain (see Newtonian behavior and thixotropy). responsibility of the user of this standard to establish appro- (Compare consistency.) priate safety and health practices and determine the applica- bility of regulatory limitations prior to use. 3.2 Definitions of Terms Specific to This Standard: 3.2.1 viscosity, n—the ratio of shear stress to shear rate. The 2.Referenced Documents viscosity of a liquid is a measure of the internal friction of the 2.1 ASTM Standards:2 liquid in motion. The unit of dynamic viscosity is the poise, D88 Test Method for Saybolt Viscosity whichis expressed as dyne-seconds per square centimetre.For a Newtonian liquid, the viscosity is constant at all shear rates. D115 Test Methods for Testing Solvent Containing Var- For a non-Newtonian liquid, viscosity will vary depending on nishes Used for Electrical Insulation D562 Test Method for Consistency of Paints Measuring shear rate. Krebs Unit (KU) Viscosity Using a Stormer-Type Viscom 4. Significance and Use eter D907 Terminology of Adhesives 4.1 Several test methods are noted for viscosity determina- D1200 Test Method for Viscosity by Ford Viscosity Cup tionofNewtonian andnearNewtonianflowcharacteristics. D1545 Test Method for Viscosity of Transparent Liquids by (For adhesives not fitting into this category, Test Method Bubble Time Method D2556 should be considered.) Four test methods are covered as D1601 Test Method for Dilute Solution Viscosity of Ethyl- follows: ene Polymers 4.1.1MethodAis applicableonlytoadhesives thatwill D2556 Test Method for Apparent Viscosity of Adhesives deliver50mLinasteadyuninterruptedstreamfromoneofthe Having Shear-Rate-Dependent Flow Properties Using Ro- cups described in Section 5. tational Viscometry 4.1.2 Method B is intended for measuring the viscosity of adhesives covering a range from 0.05 Pa : s to 200 Pa : s (50 to 200 000 cP) and is limited to materials that have or 1These test methods are under the jurisdiction of ASTM Committee D14 on approach Newtonian flow characteristics. Adhesives and are the direct responsibility of Subcommittee D14.10 on Working 4.1.3 Method C is intended primarily as a control method Propeirties. Current edition approved Feb. 1, 2008. Published February 2008. Originally for determining the viscosity of adhesives that have or ap- approved in 1950. Last previous edition approved in 2005 as D1084 -97 (2005). proach Newtonian flow characteristics. DOI: 10.1520/D1084-08. 2 For referenced ASTM standards, visit the ASTM website, wwwastm.org, or contact ASTM Customer