1、Designation: F494 05 (Reapproved 2016) 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 originaladoptio
2、n 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 disposab
3、le 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 tes
4、t 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 addres
5、s 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 fo
6、r 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 consu
7、mer.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 SpecimensTest 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 withinstructions, the primary disposable bag shall not be damagedor its function impaired.3.5 ReportThe report shall include any problems encoun-tered during installation and removal of the primary disposablebag.4. Workmanship4.1 ScopeThis test
10、method provides a means of evaluatingworkmanship of the primary disposable bag.4.2 Test SpecimensTest 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 fastening o
11、f 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 cleanerman
12、ufacturer, 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 4.3.1These test methods are under the jurisdiction of ASTM Committee F11 onVacuum
13、 Cleaners and are the direct responsibility of Subcommittee F11.23 onFiltration.Current edition approved April 1, 2016. Published April 2016. Originallyapproved in 1978. Last previous edition approved in 2011 as F494 05 (2011).DOI: 10.1520/F0494-05R16.Copyright ASTM International, 100 Barr Harbor Dr
14、ive, PO Box C700, West Conshohocken, PA 19428-2959. United States15. Durability5.1 ScopeThe durability of the primary disposable bag isdetermined by a life test within the vacuum cleaner for whichthe bag is intended.5.2 Apparatus:5.2.1 Vacuum Cleaner.5.2.2 Conditioning Chamber or Cabinet, in which s
15、peci-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 Solenoi
16、d, 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 a
17、nd 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
18、 CleanersThe 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 SpecimensTest specimens shall be representativeof the primary disposable bag be
20、ing 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 startin
21、g 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 openi
23、ngsnormally 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 for
24、 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.5.6.7.1
25、 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, join
27、ts, 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 andcon
28、ditioning 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 maint
29、ain 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).TABLE 1 Analysis of Coarse Grade Air Cleaner F11 Test DustA, BParticle Size Distribution by VolumeSize, m Coarse Grade(% less than)5.5 13311 24322 37 344 56 388 84 3176 1
30、00AThe information in Table 1 is contained in “Air Cleaner Test Code,” SAE TechnicalReport J726b.BThe sole source of supply of the test dust known to the committee at this time isPowder Technology, Inc., 1119 Riverwood Drive, Burnsville, MN 55337. If you areaware of alternative suppliers, please pro
31、vide this information to ASTM Interna-tional Headquarters. Your comments will receive careful consideration at ameeting of the responsible technical committee,1which you may attend.F494 05 (2016)26.2.5 Humidity-Measuring Equipment, accurate to within62 % relative humidity.6.3 Test SpecimensTest spec
32、imens shall be representativeof the primary disposable bag being tested. Use fresh samplesfor each of the tests in 6.5.1 and 6.5.2, and 6.5.3.6.4 ConditioningAge all test specimens at least 24 h atambient conditions of 68 to 81F (20 to 27C) and 30 to 55 %relative humidity to prepare them for the hot
33、, 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 ambient con-ditions of
34、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, theoperating period in 5.6.7 sh
35、all 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 Repeat the cycle (6.5.
36、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 instead of 12 h.6.5.3
37、 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 to 55 % relative humi
38、dity.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 operating period in 5.6.7
39、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. Pinhole leaks are not cons
40、idered 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 % confidence interva
41、l for thetrue percent defective that is less than 0.20 in width (see AnnexA1).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 integrityANNEX(Mandat
42、ory 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 this characteristic divi
43、ded 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 interval willbracket the
44、 true proportion.A1.2 Glossary of Additional Terms: = probability of being wrong,1 = 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 interval(in accordance with 7.2, A
45、= 0.20).A1.3 The following procedure gives an interval which isexpected to bracket (P), the true proportion, 100 (1 )%ofthe time:A1.3.1 Choose the desired confidence level, 1 .A1.3.2 Compute p = r/n.A1.3.3 If n w- 30, use Table A1.1.F494 05 (2016)3TABLE A1.1 Confidence Limits for a Proportion (Two-S
46、ided)ANOTE 1Upper limits are in boldface. The observed proportion in a random sample is r/n.r 90 % 95 % 99 % r 90 % 95 % 99 %n =1 n =20 0 0.900 0 0.950 0 0.990 0 0 0.684 0 0.776 0 0.9001 0.100 1 0.050 1 0.010 110.051 0.949 0.025 + 0.975 0.005 + 0.9952 0.316 1 0.024 1 0.100 1n =3 n =40 0 0.536 0 0.63
47、2 0 0.785 0 0 0.500 0 0.527 0 0.6841 0.035 0.804 0.017 0.865 0.003 0.941 1 0.026 0.680 0.013 0.751 0.003 0.8592 0.196 0.965 + 0.135 + 0.983 0.059 0.997 2 0.143 0.857 0.098 0.902 0.042 0.9583 0.464 1 0.368 1 0.215 + 130.320 0.974 0.249 0.987 0.141 0.9974 0.500 1 0.473 1 0.316 1n =5 n =60 0 0.379 0 0.
48、500 0 0.602 0 0 0.345 0 0.402 0 0.5361 0.021 0.621 0.010 0.657 0.002 0.778 1 0.017 0.542 0.009 0.598 0.002 0.7062 0.112 0.753 0.076 0.811 0.033 0.894 2 0.093 0.667 0.063 0.729 0.027 0.8273 0.247 0.888 0.189 0.924 0.106 0.967 3 0.201 0.799 0.153 0.847 0.085 0.915 +4 0.379 0.979 0.343 0.990 0.222 0.99
49、8 4 0.333 0.907 0.271 0.937 0.173 0.9735 0.621 1 0.500 1 0.398 150.458 0.983 0.402 0.991 0.294 0.9986 0.655 + 1 0.598 1 0.464 1n =7 n =80 0 0.316 0 0.377 0 0.500 0 0 0.255 0 0.315 + 0 0.4511 0.015 0.500 0.007 0.554 0.001 0.643 1 0.013 0.418 0.006 0.500 0.001 0.5902 0.079 0.684 0.053 0.659 0.023 0.764 2 0.069 0.582 0.046 0.685 0.020 0.7073 0.170 0.721 0.129 0.775 0.071 0.858 3 0.147 0.745 + 0.111 0.711 0.061 0.8024 0.279 0.830 0.225 + 0.871 0.142 0.929 4 0.240 0.760 0.193 0.807 0.121 0.8795 0.316 0.921
