1、Designation: D4334 05 (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
2、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 test method covers the determination of the forcenecessary to separate the dip tube from
3、 the body of 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
4、the applicability 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
5、increasing load to the test specimen untilthe dip tube is separated from the body of the mechanical pumpdispenser.NOTE 1The condition of 3.1 is fulfilled by most motor driven tensilestrength testers with a constant rate of elongation.NOTE 2The test stand should be equipped with a maximum forceindica
6、tor.3.2 Clamps:3.2.1 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 s
7、lippage between thedip 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 pumpdispen
8、sers at random for precision 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 tempera
9、ture, this should benoted in the test 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
10、 the test standard in accor-dance with 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.NOTE 3At this time, there
11、should be a zero reading on the force gage.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
12、 (see 7.1).6.5 Record the maximum force reading, N (lb).6.6 Record the mode of failure for each test specimen tested.7. Report7.1 The report shall include the following:1This test method is under the jurisdiction of ASTM CommitteeD10 onPackaging , and is the direct responsibility of Subcommittee D10
13、.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/D4334-05R10.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United
14、 States.7.1.1 Complete identification of 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
15、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 Test Method D4334 ishighly dependent on the particular pump dip tube size, dip tubematerial, and pump style test
16、ed. One laboratory has investi-gated one particular fine mist pump style 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
17、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 of repeatabilityand repr
18、oducibility is not practicable.8.2 BiasTest Method D4334 has no bias because anaccepted reference or referee value is not available.9. Keywords9.1 dip tube; mechanical pump dispenser; retentionASTM International takes no position respecting the validity of any patent rights asserted in connection wi
19、th any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible tech
20、nical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful considerat
21、ion at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Ha
22、rbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D4334 05 (2010)2
