1、Designation:D433418Standard Practice forDetermination of the Dip Tube Retention of a MechanicalPump Dispenser1This standard is issued under the fixed designation D4334;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last
2、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 forcenecessary to separate the dip tube from the body of amechanical pump dispense
3、r(spray or flow types).1.2 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 limita
4、tions prior to use.1.3 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 Te
5、chnicalBarriers to Trade(TBT)Committee.2.Significance and Use2.1 This practice may be used to establish performancespecifications.2.2 This practice may be used as a quality control assess-ment.3.Apparatus3.1 Test StandThe test apparatus shall be capable ofapplying a smoothly increasing load to the t
6、est specimen untilthe dip tube is separated from the body of the mechanical pumpdispenser.NOTE1The condition of 3.1 is fulfilled by most motor driven tensilestrength testers with a constant rate of elongation.NOTE2The test stand should be equipped with a maximum forceindicator.3.2 Clamps:3.2.1 Fixtu
7、re,to secure the upper part of the mechanicalpump dispenser.The fixture shall secure the dispenser in sucha way that there is no slippage between it and the testspecimen.3.2.2 Clamp,to secure the dip tube.The clamp shall holdthe dip tube in such a way that there is no slippage between thedip tube an
8、d the clamp.3.2.3 Arrange the fixturing so that the tube is maintained ina position parallel to,and within the colinear plane of,theapplied force.3.3 Scale,graduated in either millimetres or inches.4.Sampling4.1 Select an appropriate number of dry,unused pumpdispensers at random for precision and ac
9、curacy desired.Useof 10 test specimens is recommended,but a minimum of threeis acceptable.5.Conditioning5.1 If possible,condition the test specimens at 23 6 3C(736 5.4F)for not less than 4 h.If the test specimens are notconditioned at the recommended temperature,this should benoted in the test repor
10、t discussed in 7.1.5.2 Test pumps should be tested no sooner than 24 h afterassembly when possible.If the pumps are not conditioned atthe recommended time,this should be noted in the test reportdiscussed in 7.1.6.Procedure6.1 Attach fixtures and clamp to the test standard in accor-dance with the man
11、ufacturers instructions and in a mannerconsistent with the pumps geometry.6.2 Insert the dip tube securely into the clamp and tighten toprevent slippage.6.3 Adjust the test stand so that there is 25 mm of exposeddip tube length.NOTE3At this time,there should be a zero reading on the force gage.6.4 O
12、perate the test stand at 250 mm(10 in.)/min until thedip tube has separated either from the pump dispenser,broken,slipped from the jaws,or reached the limit of cross-head travel.If the recommended cross-head speed is not used,recordcross-head speed(see 7.1).6.5 Record the maximum force reading,N(lb)
13、.6.6 Record the mode of failure for each test specimen tested.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.Originallya
14、pproved in 1984.Last previous edition approved in 2010 as D4334 05(2010).DOI:10.1520/D4334-18.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
15、 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 7.Report7.1 The report shall include the following:7.1.1 Complete identification o
16、f the pump dispenser usedincluding type,source,and manufacturers code and date ofmanufacture,if known,7.1.2 Number of specimens tested,7.1.3 Number of dip tubes that were separated from thepump dispensers,7.1.4 Mean,minimum,maximum,and standard deviation offorces required to separate the dip tubes from pump dispensers,and7.1.5 Mode of failure for those pump dispensers that did notseparate.8.Precision and Bias8.1 PrecisionThe precision of Practice D4334 is highlydependent on the particular pump d
