1、Designation:D433405(Reapproved 2010)Standard Test Method for theDetermination 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 re
2、vision,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 test method covers the determination of the forcenecessary to separate the dip tube from the body o
3、f amechanical pump dispenser(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 consult andestablish appropriate safety and health practices and deter-mine the applicabili
4、ty of regulatory limitations prior to use.2.Significance and Use2.1 This test method may be used to establish performancespecifications.2.2 This test method may be used as a quality controlassessment.3.Apparatus3.1 Test StandThe test apparatus shall be capable ofapplying a smoothly increasing load t
5、o the test 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.
6、1 Fixture,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
7、tube and 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
8、 and accuracy 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 tes
9、t report 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
10、the manufacturers 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 gag
11、e.6.4 Operate 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 readin
12、g,N(lb).6.6 Record the mode of failure for each test specimen tested.7.Report7.1 The report shall include the following:7.1.1 Complete identification of the pump dispenser usedincluding type,source,and manufacturers code and date ofmanufacture,if known,1This test method is under the jurisdiction of
13、ASTM CommitteeD10 onPackaging,and is the direct responsibility of Subcommittee D10.33 on MechanicalDispensers.Current edition approved Oct.1,2010.Published March 2011.Originallyapproved in 1984.Last previous edition approved in 2005 as D4334 05.DOI:10.1520/D4334-05R10.Copyright ASTM International,10
14、0 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 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,and
15、7.1.5 Mode of failure for those pump dispensers that did notseparate.8.Precision and Bias8.1 PrecisionThe precision of Test Method D4334 ishighly dependent on the particular pump dip tube size,dip tubematerial,and pump style tested.One laboratory has investi-gated one particular fine mist pump style
16、 using a capillary-styledip tube with 50 replicate tests,yielding an average of 3.62 lbfwith a range of 4.2 to 3.2 lbf and a standard deviation of 0.34lbf.Other pumps will have other averages of retention and willhave more or less variability between replicate tests.Users ofthis test method are encouraged to reference historical files ofprevious tests of similar pumps for an estimate of withinlaboratory repeatability.Because of this strong product andpump style dependency,further investigation o
