AATCC22：拒水性能測試

AATCC22:拒水性能測試一噴淋法目的和范圍標準適用于任何紡織品織物，不論其是否已做過拒水性能處理。本標準能測定織物抗水潤濕性能，別適合于經(jīng)拒水性能處理的紡織品，尤其是平紋機織物。由于本儀器簡單和可攜帶，測試程序較為簡潔，使得本標準特別適合于工廠產(chǎn)品控制。由于本標準不能測定水珠滲透到織物里面的性能，建議不要采用本標準評估防水織物的防雨滲透性能。本標準的測試結(jié)果與纖維、紗線及織物的整理的最初拒水及潤濕性能有關(guān)，和織物的結(jié)構(gòu)關(guān)系不大。原理在規(guī)定條件程序下，將水噴在一塊繃緊的試樣上，使其表面形成一潤濕圖案，其大小與織物的拒水性能有關(guān)。評定結(jié)果是將其與標準圖案作對比而定。儀器AATCC噴淋測試儀，250毫升量筒，去離子水。

測試方法.將180X180mm測試樣緊緊的固定于直徑為152mm的環(huán)上，使它表面光滑，不可有自由折皺的表面。.將帶有織物的這個環(huán)放置在測試儀器的支架上，使得噴頭的中心對準環(huán)的中心。.使織物的經(jīng)向順著布面水珠流下的方向，加入27±1°C250ml的水于漏斗測試儀器的漏斗中，使它于25-30S噴完，并且添加液體時避免與漏斗接觸。漏斗的移動會改變噴頭與織物的相對位置。.噴淋時間必須控制在25-30S，否則應(yīng)檢查小孔是否擴大或堵塞。.握住環(huán)的一側(cè)，在環(huán)的對側(cè)用硬物輕敲，并且測試樣面向這個物體，然后轉(zhuǎn)環(huán)180度，重復以上動作一次。評定級別(附圖)100{ISO5]90(1504)SO(ISC3】70(1502]50EISOJ]0100分：上層表面沒有沾水或潤濕；90分：上層表面有少量水，不規(guī)則的沾水或潤濕；80分：上層表面受淋處有潤濕；70分：全部上層表面有部分潤濕；50分：全部上層表面完全潤濕；0分：全部上層表面有部分潤濕，并且表面下沉。AATCC22-2005紡織品拒水性測試噴淋法AATCCTestMethod22-2005WaterRepellency:SprayTestAATCC22-2005紡織品拒水性測試噴淋法Developedin1941byAATCCCommit-teeRA63;revised1952,1996,2001,2005;reaffirmed1943,1961,1964,1967,1971,1974,1977,1980,1985,1989;editoriallyrevised1987.Techni-callyequivalenttoISO4920.PurposeandScopescreeningfinishes.Itisnotintended,however,foruseinpredictingtheproba-blerainpenetrationresistanceoffabrics,sinceitdoesnotmeasurepenetrationofwaterthroughthefabric.Fortestingrainpenetration,AATCCMethod35,WaterResistance:RainTest,shouldbeused.ApparatusandMaterialsimumof4hbeforetesting.Wherepossible,eachspecimenshouldcontaindifferentgroupsoflength-wiseandwidthwiseyarns.8.Procedure1.1Thistestmethodisapplicabletoanytextilefabric,whichmayormaynothavebeengivenawater-repellentfinish.Itmeasurestheresistanceoffabricstowettingbywater.Itisespeciallysuitableformeasuringthewater-repellenteffi-cacyoffinishesappliedtofabrics.Theresultsobtainedwiththistestmethoddependontheresistancetowet-tingorwaterrepellencyofthefibers,yarnsandfinishesonthefabric,andupontheconstructionofthefabric.PrincipleAATCCSprayTester(see11.1,Figs.1,2,2Aand3).Graduatedcylinder,250mL.6.3Water,distilled.6.4Stopwatch(see8.3)TestSpecimensThreetestspecimens180.0X180.0mm(7.0X7.0in.)areneededandshouldbeconditionedat65土2%relativehu-midityand21土1°C(70土2°F)foramin-Calibratetheapparatusbypouring250mLofdistillfewaterat27土1°C(80土2°F)intothefunnelofthetesterandmeasurethetimerequiredforthefunneltoempty.Thespraytimemustbebetween25-30s,otherwisethenozzleshouldbecheckedtoseeiftheholesareenlargedorblocked.Fastenthetestspecimensecurelyinthe152.4mm(6.0in.)diameterhoopsothatthefaceofthefabricspecimenwillbeexposedtothewaterspray.Thesurfaceofthespecimenshouldbesmoothandwithoutwrinkles.Watersprayedagainstthetautsur-faceofatestspecimenundercontrolledconditionsproducesawettedpatternwhosesizedependsontherepellencyofthefabric.Evaluationisaccomplishedbycomparingthewettedpatternwithpic-turesonastandardchart.Terminology3.1waterrepellency,n.一intextiles,thecharacteristicofafiber,yarnorfabrictoresistwetting.face,n.一intextiles,thesideofafabricthatisintendedtobetheoutervisi-blesurfaceinanendproduct.SafetyPrecautionsNOTE:Thesesafetyprecautionsareforinformationpurposesonly.Thepre-cautionsareancillarytothetestingproce-duresandarenotintendedtobeallinclu-sive.Itistheuser’sresponsibilitytousesafeandpropertechniquesinhandlingmaterialsinthistestmethod.Manufac-turersMUSTbeconsultedforspecificdetailssuchasmaterialsafetydataandothermanufacturer'srecommendations.AllOSHAstandardsandrulesmustalsobeconsultedandfollowed.4.1Goodlaboratorypracticesshouldhefollowed.Wearsafetyglassesinalllaboratoryareas