1、Designation: D3890 05 (Reapproved 2010)D3890 18Standard Test Method Practice forNumber of Strokes to Prime a Mechanical Pump Dispenser1This standard is issued under the fixed designation D3890; the number immediately following the designation indicates the year oforiginal adoption or, in the case of
2、 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 number of actuations required to prim
3、e a pump dispenser (sprayand flow types) with a consumer-type product.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 establish appropriate safety safety, health, and healthenvironmenta
4、l practices and determine theapplicability 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 International Standards, Guides
5、and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Significance and Use2.1 This test method practice can be used to visually compare priming characteristics of different pump dispensers and differentproducts.2.2 This test method practice is suita
6、ble for establishing specifications for both the pump dispenser and the final package.3. Apparatus3.1 No apparatus is required, although a mechanical device for actuating the pump dispenser may be used.4. Sampling4.1 Select an appropriate number of dry, unused pump dispensers at random for the preci
7、sion and accuracy desired. A numberof ten test specimens are recommended, but a minimum of three is acceptable.5. Conditioning5.1 If possible, condition the test specimens at 23 6 3C (73 6 5.4F) for not less than 4 h. If the test specimens are notconditioned at the recommended temperature, this shou
8、ld be noted in the test report discussed in 8.1.5.2 Test pumps should be tested no sooner than 24 h after assembly when possible. If the pumps are not conditioned at therecommended time, this should be noted in the test report discussed in 8.1.6. Test Specimens6.1 For each test specimen, select a co
9、ntainer to which the pump dispenser will be attached during the test. Since the dip tubelength affects the number of strokes to prime, the actual bottle of the final package is recommended for testing.7. Procedure7.1 Fill each container with the product to be tested at the actual level of the final
10、package target weight.7.2 Attach the pump dispenser securely to the container. The pump should be in the off, locked, or closed position. Take carenot to actuate the pump dispenser during this step.NOTE 1If the actuator is placed onto the pump after the pump has been secured onto the container, then
11、 report this additional stroke in the final resultsin 8.1.1 This test method practice is under the jurisdiction ofASTM Committee F02 on FlexiblePrimary Barrier Packaging and is the direct responsibility of Subcommittee F02.30on Mechanical Pump Dispensers.Current edition approved Oct. 1, 2010May 1, 2
12、018. Published March 2011June 2018. Originally approved in 1980. Last previous edition approved in 20052010 asD3890 05.D3890 05 (2010). DOI: 10.1520/D3890-05R10.10.1520/D3890-18.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what c
13、hanges 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 appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the of
14、ficial document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1NOTE 2If an actuation is required when opening or unlocking the pump, then report this additional actuation in the test report discussed in 8.1.7.3 If the pump dispenser
15、is equipped with an overcap or locking feature, remove or release the feature to permit the pumpdispenser to be in the operable mode.7.4 If the pump dispenser has a variable output-per-stroke feature, make an appropriate adjustment to achieve the desiredoutput-per-stroke at this time. Report this de
16、sired dosage in 8.1.7.5 Actuate the pump dispenser to its fullest extent with smooth, firm, and even pressure. Allow the pump mechanism to fullyreturn before beginning the next stroke.NOTE 3Depending on the venting system, some mechanical pump dispensers can have variation in the number of strokes-t
17、o-prime due to the timethat the priming vent is opened. It is suggested that a rate of 90 6 15 strokes per minute be used. For some viscous products, this rate may be too fastfor the mechanical pump dispenser to fully return. If the rate of actuation is outside of this rangefaster or slower, report
18、in 8.1.7.6 Record the number of full strokes until the first full discharge of product is observed.NOTE 4If the visual determination of the first full stroke is not accurate enough, the amount of product dispensed by the mechanical pump dispensermay be weighed after each stroke, and the amount dispe
19、nsed would be determined by subtracting the post-stroke weight from the pre-stroke weight. Thestrokes-to-prime number to be recorded would then be the count value that shows the first consistent weight dispensed.NOTE 5If the pump does not prime within 25 strokes, that pump should be inspected for th
20、e cause of not priming. This pump should be reportedin 8, but not included in the statistical results.8. Report8.1 Report the following information:8.1.1 Product description, type of pump dispenser being tested, dip tube length used, and for variable dosage pumps, the dosageselected,8.1.2 Mean, maxi
21、mum, minimum, and standard deviation values required to prime the pump dispensers, and8.1.3 The rate actuation if outside the specified range.9. Precision and Bias9.1 PrecisionThe precision of Test Method Practice D3890 is highly dependent on the particular pump style and contentstested. One laborat
22、ory has investigated one particular pump style and a lotion product with 100 replicate tests, yielding an averageof 8.59 strokes to prime with a range of 7 to 10 strokes and a standard deviation of 0.66 strokes. Other pumps and contents willhave other averages of strokes to prime and will have more
23、or less variability between replicate tests. Users of this test methodpractice are suggested to reference historical files of previous tests of similar pumps and contents for an estimate ofwithinlaboratory repeatability. The committee believes that because of this strong product and pump style depen
24、dency, furtherinvestigation of repeatability and reproducibility is not practicable.9.2 BiasTest Method Practice D3890 has no bias because an accepted reference or referee value is not available.10. Keywords10.1 dispensing; mechanical pump dispenser; strokes-to-primeASTM International takes no posit
25、ion 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 responsibilit
26、y.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 to ASTM
27、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 address sh
28、own 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
