AATCC22：拒水性能测试-喷淋法

AATCC22：拒水性能测试一喷淋法目的和范围标准适用于任何纺织品织物，不论其是否已做过拒水性能处理。本标准能测定织物抗水润湿性能，别适合于经拒水性能处理的纺织品，尤其是平纹机织物。由于本仪器简单和可携带，测试程序较为简洁，使得本标准特别适合于工厂产品控制。由于本标准不能测定水珠渗透到织物里面的性能，建议不要采用本标准评估防水织物的防雨渗透性能。本标准的测试结果与纤维、纱线及织物的整理的最初拒水及润湿性能有关，和织物的结构关系不大。原理在规定条件程序下，将水喷在一块绷紧的试样上，使其表面形成一润湿图案，其大小与织物的拒水性能有关。评定结果是将其与标准图案作对比而定。仪器AATCC喷淋测试仪，250毫升量筒，去离子水。测试方法.将180X180mm测试样紧紧的固定于直径为152mm的环上，使它表面光滑，不可有自由折皱的表面。.将带有织物的这个环放置在测试仪器的支架上，使得喷头的中心对准环的中心。.使织物的经向顺着布面水珠流下的方向，加入27±1°C250ml的水于漏斗测试仪器的漏斗中，使它于25-30s喷完，并且添加液体时避免与漏斗接触。漏斗的移动会改变喷头与织物的相对位置。•喷淋时间必须控制在25-30S，否则应检查小孔是否扩大或堵塞。.握住环的一侧，在环的对侧用硬物轻敲，并且测试样面向这个物体，然后转环180度，重复以上动作一次。评定级别(附图)100{ISO5]70(1502}(1504)50100{ISO5]70(1502}(1504)50[ISOJJ100分：上层表面没有沾水或润湿；90分：上层表面有少量水，不规则的沾水或润湿80分：上层表面受淋处有润湿；70分：全部上层表面有部分润湿；50分：全部上层表面完全润湿；0分：全部上层表面有部分润湿，并且表面下沉。AATCC22-2005纺织品拒水性测试喷淋法AATCCTestMethod22-2005WaterRepellency:SprayTestAATCC22-2005纺织品拒水性测试喷淋法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±2%relativehu-midityand21±1°C(70±2°F)foramin-Calibratetheapparatusbypouring250mLofdistilldewaterat27±1°C(80±2°F)intothefunnelofthetesterandmeasurethetimerequiredforthefunneltoempty.Thespraytimemustbebetween25-30s,otherwisethenozzleshouldbecheckedtoseeiftheholesareenlargedorblocked.Fastenthetestspecimensecurelyinthe152.4mm(6.0in.)diameterhoopsothatthefaceofthefabricspecimenwillbeexposedtothewaterspray.Thesurfaceofthespecimenshouldbesmoothandwithoutwrinkles.Watersprayedagainstthetautsur-faceofatestspecimenundercontrolledconditionsproducesawettedpatternwhosesizedependsontherepellencyofthefabric.Evaluationisaccomplishedbycomparingthewettedpatternwithpic-turesonastandardchart.Terminology1waterrepellency,n.—intextiles,thecharacteristicofafiber,yarnorfabrictoresistwetting.face,n.—intextiles,thesideofafabricthatisintendedtobetheoutervisi-blesurfaceinanendproduct.SafetyPrecautionsNOTE:Thesesafetyprecautionsareforinformationpurposesonly.Thepre-cautionsareancillarytothetestingproce-duresandarenotintendedtobeallinclu-sive.Itistheuser'sresponsibilitytousesafeandpropertechniquesinhandlingmaterialsinthistestmethod.Manufac-turersMUSTbeconsultedforspecificdetailssuchasmaterialsafetydataandothermanufacturer'srecommendations.AllOSHAstandardsandrulesmustalsobeconsultedandfollowed.1Goodlaboratorypracticesshouldhefollowed.Wearsafetyglassesinalllaboratoryareas.Us