1、Designation: F494 05 (Reapproved 2011)An American National StandardStandard Test Methods forEvaluating Primary Disposable Bag Integrity for VacuumCleaners1This standard is issued under the fixed designation F494; the number immediately following the designation indicates the year of originaladoption
2、 or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 These test methods cover the evaluation of the integrityof the primary disposabl
3、e bag used for vacuum cleaners.1.2 The intent of these test methods is to verify that thedesign of the primary disposable bag will perform satisfactorilyfor the consumer in a wide range of normal use conditions. Thefiltering capability of the disposable bag is not evaluated withthe use of these test
4、 methods.1.3 The following tests are included:SectionInstallation and Removal 3Workmanship 4Durability 5Seams and Joints 61.4 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.1.5 This standard does not purport to address
5、 all of thesafety problems, 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. Significance and Use2.1 These test methods are useful for
6、 routine control, designof end-use products, and acceptance testing for conformance tospecifications. Good workmanship, seams, and joints thatremain strong over a wide range of atmospheric conditions andhave the ability to withstand repeated cycles are necessary forsatisfactory end use to the consum
7、er.TEST METHODS3. Installation and Removal3.1 ScopeThese test methods provide guidelines for theinstallation and removal of the primary disposable bag.3.2 ApparatusThe vacuum cleaner model for which theprimary disposable bag is intended.3.3 Test Specimens Test specimens shall be representativeof the
8、 primary disposable bag system being tested.3.4 ProcedureThe primary disposable bag shall be in-stalled in accordance with the instructions of the vacuumcleaner manufacturer.3.4.1 Construction of the primary disposable bag shall besuch that no holes or tears will be made when it is prepared forinsta
9、llation.3.4.2 When installed or removed, in accordance with in-structions, the primary disposable bag shall not be damaged orits function impaired.3.5 ReportThe report shall include any problems encoun-tered during installation and removal of the primary disposablebag.4. Workmanship4.1 ScopeThis tes
10、t method provides a means of evaluat-ing workmanship of the primary disposable bag.4.2 Test Specimens Test specimens shall be representativeof the primary disposable bag system being tested.4.3 ProcedureInspect primary disposable bag for confor-mance to the following:4.3.1 Complete sealing or fasten
11、ing of all seams, tucks,joints, and attachments,4.3.2 No tears, rips, holes, or other manufacturing typefaults,4.3.3 Printed instructions, when they appear, shall be clearand legible,4.3.4 Dimensions shall agree with drawing specifications, orthe primary disposable bag as defined by the vacuum clean
12、ermanufacturer, and4.3.5 If adhesives are used for seams and joints, there shallbe no bleed through to adjacent plys or misplacements.4.4 ReportThe report shall include any defects in work-manship noted in the inspection in 4.3.5. Durability5.1 ScopeThe durability of the primary disposable bag isdet
13、ermined by a life test within the vacuum cleaner for whichthe bag is intended.1These test methods are under the jurisdiction of ASTM Committee F11 onVacuum Cleaners and are the direct responsibility of Subcommittee F11.23 onFiltration.Current edition approved Nov. 1, 2011. Published March 2012. Orig
14、inallyapproved in 1978. Last previous edition approved in 2005 as F494 05. DOI:10.1520/F0494-05R11.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.2 Apparatus:5.2.1 Vacuum Cleaner.5.2.2 Conditioning Chamber or Cabinet, in which spe
15、ci-mens may individually be exposed to circulating air andconditioning relative humidity and temperature within thelimits specified in 5.5.5.2.3 Temperature-Measuring Equipment, accurate towithin 61F (60.5C).5.2.4 Humidity-Measuring Equipment, accurate to within62 % relative humidity.5.2.5 Solenoid,
16、 to control the movement of a spring-loadedplate.5.2.6 Timer, to control the activation of the solenoid on thebasis of time.5.2.7 Plate, to seal the intake of the test cleaner. This plate,connected directly to the solenoid shaft, must open sufficientlyso as not to restrict air flow and must open and
17、 close the intakewithin 0.1 s. Motion of the plate must not be a sliding action.5.2.7.1 Canister CleanersThe plate seals the nozzle endof the hose normally supplied with the vacuum cleaner. Thehose is attached to the vacuum cleaner in the normal mannerwith no attempts to seal leaks.5.2.7.2 Upright C
18、leaners The plate seals a 1.75 6 0.02-in. (44.5 6 0.5-mm) diameter hole located in an adapter cover.The adapter cover closes off the nozzle intake opening of thecleaner without interfering with the rotating agitator.5.2.8 Voltage RegulatorThe regulator shall be capable ofmaintaining 120 6 1 V rms 60
19、 Hz with a wave form that isessentially sinusoidal with 3 % maximum harmonic distortionfor the duration of the test.5.2.9 Voltmeter, to measure input to the cleaner and providemeasurements accurate to within 61%.5.3 Test Specimens Test specimens shall be representativeof the primary disposable bag b
20、eing tested.5.4 MaterialCoarse grade air cleaner test dust.NOTE 1The particle size distribution by volume of the test dust isgiven in Table 1.5.5 Conditioning Allow test specimens to age at ambientconditions of 68 to 81F (20 to 27C) and 45 to 55 % relativehumidity for a minimum of 24 h before starti
21、ng tests.5.6 Procedure:5.6.1 Perform all tests on the vacuum cleaner in a controlledambient with a dry-bulb temperature of 68 to 81F (20 to 27C)and 30 to 55 % relative humidity.5.6.2 Measure and calculate the total primary disposablebag area excluding seams, joints, treated seal area, mountingmeans,
22、 and multiple thickness of media. Measure multiplethicknesses that are intended for a specific filtering purpose asa single ply.5.6.3 Prepare 0.0023 oz of coarse grade air cleaner test dustper square inch of primary disposable bag area (0.010 g/cm2).5.6.4 Close vacuum bleed control and seal all open
23、ingsnormally closed off with operation of tools.5.6.5 Install the primary disposable bag in the intendedmanner in the vacuum cleaner for which it was designed.Energize the cleaner and adjust the voltage regulator to ratedvoltage 61V.5.6.5.1 Operate the cleaner at the maximum speed settingprovided fo
24、r the carpet cleaning mode.5.6.6 Feed the amount of test dust specified in 5.6.3 at therate of 0.7 6 0.07 oz (20 6 2 g)/min into the intake port.5.6.7 After loading and with the cleaner operating at ratedvoltage, subject the cleaner to a test of 7.5 s open and 7.5 sclosed for a period of 12 h.5.6.7.
25、1 For the canister cleaner, alternately open and closethe nozzle end of the hose with the plate described in 5.2.7,while the cleaner remains running. For an upright cleaner,alternately open and close the intake hole as described in5.2.7.2, while the cleaner remains running.5.7 ReportThe report shall
26、 include any failure of theprimary disposable bag.5.7.1 Any rupture of the primary disposable bag material orseparation of seams, tucks, joints, or attachments shall consti-tute a failure. Pinhole leaks are not considered to be ruptures.6. Seams and Joints6.1 ScopeThe evaluation of seams, tucks, joi
27、nts, andattachments used to fabricate the primary disposable bag isaccomplished by means of temperature and humidity cyclingfollowed by visual inspection and durability tests.6.2 Apparatus:6.2.1 Conditioning Chamber or Cabinet, in which speci-mens may individually be exposed to circulating air andco
28、nditioning relative humidity and temperature within thelimits specified in 6.4.6.2.2 Oven, with forced ventilation, that will maintain 1566 2F (68.9 6 1.1C) at the test conditions where thespecimens are located and shielded from direct radiation fromthe heating element.6.2.3 Cold Box, that will main
29、tain specimens at 20 6 2F(28.9 6 1.1C) at the test conditions.6.2.4 Temperature-Measuring Equipment, accurate towithin 61F (60.5C).6.2.5 Humidity-Measuring Equipment, accurate to within62 % relative humidity.6.3 Test SpecimensTest specimens shall be representativeof the primary disposable bag being
30、tested. Use fresh samplesfor each of the tests in 6.5.1 and 6.5.2 and 6.5.2, and 6.5.3.TABLE 1 Analysis of Coarse Grade Air Cleaner F11 Test DustA,BParticle Size Distribution by VolumeSize, m Coarse Grade(% less than)5.5 13 6 311 24 6 322 37 6 344 56 6 388 84 6 3176 100AThe information in Table 1 is
31、 contained in “Air Cleaner Test Code,” SAETechnical Report J726b.BThe sole source of supply of the test dust known to the committee at this timeis Powder Technology, Inc., 1119 Riverwood Drive, Burnsville, MN 55337. If youare aware of alternative suppliers, please provide this information to ASTMInt
32、ernational Headquarters. Your comments will receive careful consideration at ameeting of the responsible technical committee,1which you may attend.F494 05 (2011)26.4 Conditioning Age all test specimens at least 24 h atambient conditions of 68 to 81F (20 to 27C) and 30 to 55 %relative humidity to pre
33、pare them for the hot, cold, andhumidity test cycles.6.4.1 Simultaneously condition specimens for the hot, cold,and humidity test cycles.6.5 Procedure:6.5.1 Hot Test Cycle:6.5.1.1 Place the test specimens in an oven at 156 6 2F(68.9 6 1.1C) for 4 weeks.6.5.1.2 Allow test specimens to condition at am
34、bient con-ditions of 68 to 81F (20 to 27C) and 30 to 55 % relativehumidity for 30 min minimum after removal from oven.6.5.1.3 Examine the specimens visually for any obviousfailure and subject each of the test specimens to a durabilityevaluation similar to that in Section 5. For this test, theoperati
35、ng period in 5.6.7 shall be 5 min instead of 12 h.6.5.2 Cold Test Cycle:6.5.2.1 Place test specimens in a cold box for 24 h at 20 62F (28.9 6 1.1C).6.5.2.2 Condition at ambient conditions of 68 to 81F (20 to27C) and 30 to 55 % relative humidity for 30 min minimumafter removal from cold box.6.5.2.3 R
36、epeat the cycle (6.5.2.1 and 6.5.2.2) three times.6.5.2.4 Examine the specimens visually for any obviousbond failures. If there is no obvious failure, subject each of thetest specimens to a durability evaluation similar to that inSection 5. For this test, the operating period in 5.6.7 shall be 5min
37、instead of 12 h.6.5.3 Humidity Test Cycle:6.5.3.1 Place test specimens in the conditioning chamber at89.6 6 3.6F (32 6 2C) and 86 to 90 % relative humidity for24 h.6.5.3.2 After removing the test specimens from the condi-tioning chamber, condition them for 4 h minimum at 68 to 81F(20 to 27C) and 30
38、to 55 % relative humidity.6.5.3.3 Repeat the cycle (6.5.3.1 and 6.5.3.2) three times.6.5.3.4 Examine the specimens visually for any obviousbond failures. If there is no obvious failure, subject each of thetest specimens to a durability evaluation similar to that inSection 5. For this test, the opera
39、ting period in 5.6.7 shall be 5min instead of 12 h.6.6 ReportThe report for each of the tests in 6.5 shallinclude any failure of the primary disposable bag.6.6.1 Any rupture of the primary disposable bag material orseparation of seams, tucks, joints, or attachments shall consti-tute a failure. Pinho
40、le leaks are not considered to be ruptures.7. Sampling7.1 A sample of sufficient size for each primary disposablebag shall be tested until a 90 % confidence interval for the truepercent defective is established.7.2 The minimum number of tests required is defined to bethat number which will give a 90
41、 % confidence interval for thetrue percent defective that is less than 0.20 in width (seeAnnexA1).8. Precision and Bias8.1 Precision and bias do not apply for this test methodsince this is a procedure for a test that is conducted to aspecified end point.9. Keywords9.1 vacuum cleaner disposable bag i
42、ntegrityANNEX(Mandatory Information)A1. DETERMINATION OF 90 % CONFIDENCE INTERVAL (PROPORTION)A1.1 The most common and ordinarily the best singleestimate (p) of the true proportion (or percentage) (P) of itemsthat have a given quality characteristic is simply the number ofitems ( r) that possess thi
43、s characteristic divided by the totalnumber of items (n).p 5 r/n (A1.1)When a sample is taken from a population, the sampleproportion that possesses the characteristic will seldom beexactly the same proportion as the population. It is hoped to befairly close so that a statement of the confidence int
44、erval willbracket the true proportion.A1.2 Glossary of Additional Terms:a = probability of being wrong,1a = probability of being correct,Pu= upper limit of the confidence interval for P,Pl= lower limit of the confidence interval for P, andA = chosen limit for the width of the confidence inter-val (i
45、n accordance with 7.2, A = 0.20).A1.3 The following procedure gives an interval which isexpected to bracket ( P), the true proportion, 100 (1 a)%ofthe time:A1.3.1 Choose the desired confidence level, 1 a.A1.3.2 Compute p = r/n.A1.3.3 If n w- 30, use Table A1.1.A1.3.4 If n 30, look up Z = Z1a2 in Tab
46、le A1.2 andcompute:Pu5 p 1 Zp 1 2 p!n(A1.2)Pl5 p 2 Zp 1 2 p!nF494 05 (2011)3The interval from Plto Puis a 100(1 a) % confidenceinterval for the true proportion; that is, we may assert with100(1 a) % confidence that Pl30, Z0.95= 1.645 from Table A1.2. Compute:Pu5 Z0.95=p 1 p!/n (A1.3)P15 Z0.95=p 1 p!
47、/nFor example, if n = 40 and r = 12; p = 0.3, Pu= 0.419, andPl= 0.181.A1.4.5 Compare (Pu Pl)toA.A1.4.6 If (Pu Pl)A, repeat the test that increases thesample size to n + 1 and perform A1.4.2 through A1.4.5 withthe larger sample.A1.4.7 If ( Pu Pl)A, a desired 90 % confidence intervalhas been obtained.
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49、 entirely their own responsibility.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 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
