1、Designation:D306994(Reapproved 2013)Standard Test Method forDelivery Rate of Aerosol Products1This standard is issued under the fixed designation D3069;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A numbe
2、r in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1.Scope1.1 This test method covers the determination of deliveryrate of ae
3、rosol products.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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.R
4、eferenced Documents2.1 ASTM Standards:2D996 Terminology of Packaging and Distribution Environ-ments3.Terminology3.1 General definitions for packaging and distribution envi-ronments are found in Terminology D996.4.Summary of Test Method4.1 The delivery rate of an aerosol dispenser is determinedby mea
5、suring the quantity of material expelled through thevalve in a given time.The exact duration of discharge and thetemperature of the dispenser must be carefully controlled forgood reproducibility.4.2 Biological and clinical tests are often made with one ortwo dispensers selected from a group that is
6、similar in allrespects,with the exception of delivery rate.When it isdesirable to select dispensers with equal delivery rates,threetests should be performed on each dispenser.4.3 In the case of storage tests,a single delivery rate test isnormally performed at each examination period to conserve thec
7、ontents and extend the life of the dispenser.5.Significance and Use5.1 Delivery rate tests assist in evaluating one aspect ofvalve performance,and are considered as a prerequisite to bothbiological and storage testing.6.Apparatus6.1 Water Bath,maintained at 70 6 0.5F(21 6 0.25C)(80 6 0.5F(26 6 0.25C
8、)for insecticides),to matchPeet-Grady test requirements,with a screen or perforated metalshelf 1 in.(25 mm)above the bottom of the bath.6.2 Stirrer,air or electric.6.3 Balance,0.1-g scale.6.4 Stop Watch or Electric Timer.7.Sampling7.1 Normal production or laboratory samples shall be usedfor this tes
9、t.8.Test Specimen8.1 Remove the protective cover,paper label,and all otherdetachable materials from the dispenser,with the exception ofthe button or actuator.8.2 If a foam spout is used,remove the spout,cut away allnonessential plastic,and then replace the spout.9.Procedure9.1 Activate the valve for
10、 a few seconds,then remove anyvalve cup impingements,and weigh the dispenser to thenearest 0.05 g.9.2 Place the dispenser on the shelf in the water bath,whichis maintained at the test temperature of 70 6 0.1F(21 60.05C).Keep the dispenser in an upright position,spaced 1 in.(25 mm)apart,and covered w
11、ith 1 in.of water.NOTE1Approximately 0.03%sodium nitrite(NaNO2)may be addedto the water bath to prevent the minor rusting of some tinplate dispensers.9.3 Circulate the water with the mechanical stirrer.Hold for15 min in the case of essentially anhydrous products,and for25 to 30 min for viscous or wa
12、ter-base products.NOTE2In the case of thixotropic,rheopectic,and certain other1This test method is under the jurisdiction of ASTM Committee D10 onPackaging and is the direct responsibility of Subcommittee D10.33 on MechanicalDispensers.Originally developed by the Chemical Specialties Manufacturers A
13、ssn.Current edition approved April 1,2013.Published April 2013.Originallyapproved in 1972.Last previous edition approved in 2005 as D3069 94(2005).DOI:10.1520/D3069-94R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual
14、Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 emulsion types,the degree of agitation will have a considerable effectupon delivery r
15、ates.9.4 Remove the dispenser,and actuate the valve for a giventime(preferably 10 s),preferably into an exhaust hood.NOTE3Generally,the product should be shaken before any actuation,and reference should be made to any label instruction.9.5 Dry the dispenser with a clean cloth,and use a blast ofcompr
16、essed air to remove moisture from the mounting cup anddispenser seams,in the case of metal containers.9.6 Reweigh the dispenser,and compute the mass differ-ence.9.7 If duplicate tests are made,repeat 9.1-9.6.10.Calculation10.1 Calculate the delivery rate in grams per second asfollows:D 5 M/10(1)where:D=delivery rate,g/s,andM=mass loss,g.11.Report11.1 The report shall include the following:11.1.1 Product being tested,and11.1.2 Results of each test reported as delivery rate in gramsper second.12.P
