ASTM_D_6534_-_18.pdf

Designation:D653418Standard Practice forDetermining the Peak Force-to-Actuate of a MechanicalPump Dispenser1This standard is issued under the fixed designation D6534;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 parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers the determination of the peakforce-to-actuate,sometimes called force-to-actuate(FTA),of amechanical pump dispenser.1.2 The values stated in SI units are to be regarded as thestandard.The inch-pound units 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-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Specific precautionary statements are given in Section 5.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D3890 Test Method for Number of Strokes to Prime aMechanical Pump Dispenser3.Significance and Use3.1 This practice can be used to compare the peak force-to-actuate performance of different mechanical pump dispensers.3.2 This practice can be used to determine the perceivedease of use of a mechanical pump dispenser.3.3 This practice can be used to determine the peak force-to-actuate of a mechanical pump dispenser.4.Apparatus4.1 Motorized Compression Tester,or Custom Force-to-Action Machine,with the capability to actuate the mechanicalpump dispenser at a constant velocity and adjustable strokelengths while accurately measuring the resulting force(that is,load cell).NOTE1Since the velocity during actuation will affect the FTA ofcertain mechanical pump dispenser designs,care must be taken inselecting the correct type of equipment with the sufficient actuationvelocity.4.2 A device connected to the compression tester that candisplay the resulting force in newtons(N)or pounds force(lbf)of 0.1 accuracy.4.3 A means to rigidly hold the mechanical pump dispenserduring testing(that is,glass bottle or a holding fixture;see Fig.1).5.Precautions5.1 Appropriate handling considerations should be given toflammable,toxic,caustic,or other potentially hazardous ma-terials used.5.2 Appropriate operating considerations should be takenwith pinch points on the motorized compression tester.5.3 Ensure that the exit orifice of the mechanical pumpdispenser is pointed away from the operator and other people.5.4 Ensure that the motorized compression tester is properlycalibrated.5.5 Actuation Rate for Finger PumpsCare should be takenwhen selecting the travel speed of the ram.For some mechani-cal pump dispenser styles,the speed of actuation and length ofstroke can affect the peak force to actuate.As a rule of thumb,mechanical pump dispensers with a stroke length of 7 mm orgreater should use an actuation velocity of 35 to 75 mm persecond,while mechanical pump dispensers with a stroke lengthof less than 7 mm should use an actuation velocity of 35 mmper second or less.Especially for fine mist spray pumps,theabove mentioned rates are preferred.A different rate may beused;however,the true force-to-actuate during use may not bemeasured.The actuation rate used should be recorded in 10.1This practice is under the jurisdiction of ASTM Committee F02 on PrimaryBarrier Packaging and is the direct responsibility of Subcommittee F02.30 onMechanical Dispensers.Current edition approved May 1,2018.Published June 2018.Originallyapproved in 2000.Last previous edition approved in 2010 as D6534 05(2010).DOI:10.1520/D6534-18.2For 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 standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 5.6 Actuation Rate for Trigger PumpsActuation rate fortrigger sprayers to be 90 strokes per min.6.Sampling6.1 Select an appropriate number of dry,unused pumpdispensers at random for the precision and accuracy desired.Anumber of ten test specimens are recommended,but a m