1、IND-STD ASTM D3077-72R78 VALID NOTICE I 68 a 9999998 0002882 7 m-I:ASTM D 3077-72R78 NOTICE 1 27 May 1988 ACCEPTANCE NOTICE TITLE OF DOCUMENT:Standard Recommended Practice for Comparison of Spray Patterns DATE OF SPECIFIC ISSUE ADOPTED:28 July 1972 RELEASING INDUSTRY GROUP:ASTM Acceptance Notice AST
2、M D 3077-72R78,dated 26 November 1980,has been reviewed and determined to be valid for use in acquisition.Custodians:Military Coordinating Activity:Army-EA Navy-SH Air Force-68 Army-EA Review activities:Army-MD,ME DLA-GS User activity:Army-GL AMSC N/A FSC 6810 DISTRIBUTION STATEMENT A.Approved for p
3、ublic release;distribution is unlimited.-THIS DOCUMENT CONTAINS PAGES.NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.ASTM D3077*El,72-0759530 0075753 2-I#Tb Designation:D 3077-72(Reappro
4、ved 1991)”AMERICAN SOClE3-f FOR TESTING AND MATERIALS 1916 Race St Philadelphia,Pa 19103 Reprinted irom the Annual Book of ASTM Standards.Copyright ASTM If not listed in the current combined Index,will appear In the next edition.Standard Practice for Comparison of Spray Patterns of Aerosol Products1
5、 This standard is issued under the fixed designation D 3077:the number immediately following the designation indicates the year of original adoption or.in the case of revision.the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon(6)indicates an
6、 editorial change since the last revision or reapproval.This stnttdttrd ltus been opprovedji,r tt.w by ugwtciev oj/ltc Dqtarttncnr oD&tse uttd/or listing in I/W DOD Ittdes of SpcctJktions uttd Suttdurcls.I NOTE-Section 7 was added editorially in June I99 I.1.Scope 1.I This practice covers a techniqu
7、e for obtaining qualita-tive comparison of spray patterns of aerosol products.2.Summary of Practice 2.1 The comparison is based on the impingement of the spray on a piece of paper that has been treated with a dye-talc mixture.A 5%mixture of the dye in talc is brushed onto a 60-lb(27-kg)vellum paper
8、stock.A small,but known,burst of spray is allowed to impinge upon the treated paper.Whenever the particles strike the paper,the dye goes into solution and is absorbed.The size of the dye spots are in direct relation to the size of the liquid particles when they come in contact with the paper,3.Signi
9、ficance and Use 3.1 The spray pattern technique is particularly useful for comparing spray characteristics obtained with different valve,actuators,and formulations.3.2 The spray pattern technique is rapid,and can be easily done and visually evaluated at a low cost.4.Apparatus 4.1 Motor,a-c,/a-hp(124
10、-W),1725r-pm,60-Hz,11 5-V.2 4.2 Torque Converter,variable speed.3 4.3 Connecting Rod,1 in.(25 mm)in diameter by 4 in.(102 mm)long,to connect the torque converter to the disk.4.4 Rotafing Disk,stainless steel or aluminum,l/l6 in,(1.6 mm)thick,53/4 in.(146 mm)in radius,with a pie-shaped cut-out radial
11、 sector(140 mm in circumference)(that is,the edges must follow the radii of the disk),a 150-mm sliding shutter,and a slot attached,large enough to accept a 5 by 5-m.(127 by 127-mm)piece of paper.t This practice is under the jurisdiction of ASTM Committee D-IO on Packaging and is the direct responsib
12、ility of Subcommittee D10.32 on Consumer Packages.Originally developed by the Chemical Specialties Manufacturers Associ-ation.Current edition approved July 28.1972.Published September 1972.s General Electric A-C Motor Type SKH,Frame 48.or equivalent.has been found satisfactory for this purpose.3 Zer
13、o Max Torque Converter,Model 142X,available from the Revco Co.Inc.,Minneapolis,MN,has been found satisfactory for this purpose.4.4.1 The disk must revolve slowly enough so that it is possible to depress and release the aerosol valve before the slot in the disk has made a second revolution in front o
14、f the spray.A small slit width and high rate of revolution permit only a small amount of spray to pass,while a large slit width and slow rate of revolution permit a large amount of spray to pass.4.5 Mounting Board.5.Materials 5.1 Dye,soluble in spray particles.In the case of alcoholic spray(for exam
15、ple,hair spray),a water-soluble dye must be useds4 In the case of oil-soluble sprays(for example,insecti-cides),an oil-soluble dye must be used.5 5.1.1 Patterns made from aerosols containing fast-drying solvents can be kept indefinitely and can serve as permanent records,Patterns made from aerosols
16、containing oils or solvent that dry slowly change with time and must be photographed for permanent record,since the slow or non-drying oil with dissolved dye gradually spreads in the paper and distorts the pattern originally obtained.5.2 Vellum Paper Stock.6.Calculation 6.1 To obtain the exact amount of material sprayed from the container,it is necessary to know the rate of rotation of the disk,the dimensions of the cut-out sector,and the delivery rate of the valve.6.2 Calculate the exact number
