1、Designation: D4334 05 (Reapproved 2010)D4334 18Standard Test Method Practice 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
2、 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 test method practice covers the determination of the force necessary to
3、 separate the dip tube from the body of amechanical pump dispenser (spray or flow types).1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to consult and establish appropriate safety safety,
4、 health, and healthenvironmental practices anddetermine the applicability of regulatory limitations prior to use.1.3 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of I
5、nternational Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Significance and Use2.1 This test method practice may be used to establish performance specifications.2.2 This test method practice may be used as a quality control
6、 assessment.3. Apparatus3.1 Test StandThe test apparatus shall be capable of applying a smoothly increasing load to the test specimen until the diptube is separated from the body of the mechanical pump dispenser.NOTE 1The condition of 3.1 is fulfilled by most motor driven tensile strength testers wi
7、th a constant rate of elongation.NOTE 2The test stand should be equipped with a maximum force indicator.3.2 Clamps:3.2.1 Fixture, to secure the upper part of the mechanical pump dispenser. The fixture shall secure the dispenser in such a waythat there is no slippage between it and the test specimen.
8、3.2.2 Clamp, to secure the dip tube. The clamp shall hold the dip tube in such a way that there is no slippage between the diptube and the clamp.3.2.3 Arrange the fixturing so that the tube is maintained in a position parallel to, and within the colinear plane of, the appliedforce.3.3 Scale, graduat
9、ed in either millimetres or inches.4. Sampling4.1 Select an appropriate number of dry, unused pump dispensers at random for precision and accuracy desired. Use of 10 testspecimens is recommended, but a minimum of three is acceptable.5. Conditioning5.1 If possible, condition the test specimens at 23
10、6 3C (73 6 5.4F) for not less than 4 h. If the test specimens are notconditioned at the recommended temperature, this should be noted in the test report discussed in 7.1.1 This test method practice is under the jurisdiction of ASTM Committee F02 on FlexiblePrimary Barrier Packaging, and is the direc
11、t responsibility of SubcommitteeF02.30 on Mechanical Pump Dispensers.Current edition approved Oct. 1, 2010May 1, 2018. Published March 2011June 2018. Originally approved in 1984. Last previous edition approved in 20052010 asD4334 05.D4334 05(2010). DOI: 10.1520/D4334-05R10.10.1520/D4334-18.This docu
12、ment is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as
13、appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.2 Test pumps should be tested no sooner than 24 h after
14、 assembly when possible. If the pumps are not conditioned at therecommended time, this should be noted in the test report discussed in 7.1.6. Procedure6.1 Attach fixtures and clamp to the test standard in accordance with the manufacturers instructions and in a manner consistentwith the pumps geometr
15、y.6.2 Insert the dip tube securely into the clamp and tighten to prevent slippage.6.3 Adjust the test stand so that there is 25 mm of exposed dip tube length.NOTE 3At this time, there should be a zero reading on the force gage.6.4 Operate the test stand at 250 mm (10 in.)/min until the dip tube has
16、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, record cross-headspeed (see 7.1).6.5 Record the maximum force reading, N (lb).6.6 Record the mode of failure for each test specimen test
17、ed.7. Report7.1 The report shall include the following:7.1.1 Complete identification of the pump dispenser used including 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 the pump dispensers,7.1.
18、4 Mean, minimum, maximum, and standard deviation of forces required to separate the dip tubes from pump dispensers,and7.1.5 Mode of failure for those pump dispensers that did not separate.8. Precision and Bias8.1 PrecisionThe precision of Test Method Practice D4334 is highly dependent on the particu
19、lar pump dip tube size, dip tubematerial, and pump style tested. One laboratory has investigated one particular fine mist pump style using a capillary-style dip tubewith 50 replicate tests, yielding an average of 3.62 lbf with a range of 4.2 to 3.2 lbf and a standard deviation of 0.34 lbf. Otherpump
20、s will have other averages of retention and will have more or less variability between replicate tests. Users of this test methodpractice are encouraged to reference historical files of previous tests of similar pumps for an estimate of within laboratoryrepeatability. Because of this strong product
21、and pump style dependency, further investigation of repeatability and reproducibilityis not practicable.8.2 BiasTest Method Practice D4334 has no bias because an accepted reference or referee value is not available.9. Keywords9.1 dip tube; mechanical pump dispenser; retentionASTM International takes
22、 no position respecting the validity of any patent rights asserted in connection with 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 resp
23、onsibility.This standard is subject to revision at any time by the responsible technical 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
24、 to ASTM International Headquarters. Your comments will receive careful consideration 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 a
25、ddress shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor 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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 182
