China Garment Website_China's popular garment and fashion information platform China Garment News Complete collection of fabric water permeability and waterproof performance tests

Complete collection of fabric water permeability and waterproof performance tests



织物的透水性能称做透水性� �与之相反的性能称为防水性或抗渗透性� �织物容易被水沾湿的特性,主要与织物表面性能有关,因此,可以称之为表面抗湿性� �织物由于各自的用途不同,所以,其表面抗湿性能要求也不同� �用做雨衣、帐篷、船帆等织物需要有良好的防水性能,而过滤性用途的织物则需要有良好的透水性能� �一些户外用途的成衣,如风雨衣等,也对防水性有一定的要求�…

织物的透水性能称做透水性� �与之相反的性能称为防水性或抗渗透性� �织物容易被水沾湿的特性,主要与织物表面性能有关,因此,可以称之为表面抗湿性� �织物由于各自的用途不同,所以,其表面抗湿性能要求也不同� �用做雨衣、帐篷、船帆等织物需要有良好的防水性能,而过滤性用途的织物则需要有良好的透水性能� �一些户外用途的成衣,如风雨衣等,也对防水性有一定的要求� � <br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /
<br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /
The main methods for testing the waterproof performance of fabrics are:<br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;" /
A、静水压法:织物一侧受到静水压力的作用,当静水压逐渐加大,织物另一则渗出水时,以静水压的水柱高度表示织物的透水性。此方法主要是测试织物的透水性能。

B、另一种方法是喷淋试验,主要是测试织物的防水性能。

</p

织物透水(防水)性能有哪几种测试方法和仪器?

Fabric water permeability (waterproof) testing instruments are frequently used in the textile industry. There are different test instrument requirements for different standards and requirements. Currently, the commonly used fabric water permeability (waterproofing) testing instruments are hydrostatic pressure resistance testers. ,spray Type water repellent performance tester (fabric wettability tester), rainproof tester, capillary effect tester, respectively correspond to the four water permeability test methods: hydrostatic method, spray method, rain method, and wick method. The following These four methods will be introduced separately �</p

</p

  测量织物的透水性或防水性就是要测其拒水性或导水性,随织物实际使用情况不同而采用不同的方法,并以各种相应的指标来表示织物的透水性或防水性。

</p

1. Hydrostatic pressure method (fabric hydrostatic pressure tester)</p

</p

  静水压法是指在一定的水压下织物的渗水能力,它适用于所有种类的织物,包括那些经过防水整理的织物。织物的防水性与纤维、纱线和织物结构的抗水能力有关,所测结果与水喷淋和雨淋到织物表面是不一样的。用静水压法测织物的防水性,有静压法和动压Law.

  静压法是在织物的一侧施加静水压,测量在此静水压下的出水量、出水滴时间、在一定出水量时的静水压值。静水压值可以是水柱高,也可以是压强。实测中,采用测定单位面积、单位时间内的透水量(mL/cm2·h)。对于防水性织物,测量当试样另一面出现水滴所需的时间,或经过一定时间后观察另一面所出现的水珠数量。

  动压法的原理与静压法一样,只是P是变量。它是在试样的一面施以等速增加的水压P,直到另一面被水渗透而显出一定数量的水珠,所强加的水压P。此法比较适用于涂层织物或结构紧密的织物,用静水压反应织物的防水性能,静水压大的织物防水性能强,静水压小的织物防水性能弱。导水性织物,吸湿能力很强,遇水就湿,没有抗水性,也不会产生静水压。

  在AATCC 127-2003测试方法实验中,将待测样品沿着对角线方向少取3块大小面积为200mm×200mm的样品� The two sides of the sample have different waterproof properties. Mark them and test them with distilled water at (21±2)℃. The test area is 2500px2. The test surface is in contact with water. The water pressure increases at a speed of 60mbar/min (or 10mm/s). If water droplets ooze out from 3 different places on the sample, the test reaches the end point. �但若在距离样品夹3mm以内的地方渗出的水滴,是无效的� �所测结果为在相同条件下3个测试样的平均值� �测试值越大,表示水渗出样品所需的压力值越大,其防水性越好� �</p

</p

2. Spray method (spray water repellency tester)</p

</p

  喷淋法是通过连续喷水或滴水到试样上,观察试样在—定时间后表面的水渍特征,与各种润湿程度的样照对比,来评定织物的防水性。喷淋法是模拟衣物在淋到细雨时被淋湿的程度。这种方法适用于所有的经过防水处理的织物和未处理的织物,测得的防水结果与纤维、纱线、织物的处理以及织物结构有很大的关系。

</p

  在AATCC 22-2005测试方法中,将测试样用直径为152.4mm的铁环固定样品,样品处于张紧状态,表面平整没有皱� �将250mL蒸馏水从标准喷头以45°喷淋,在喷嘴下方150mm处的试样,喷淋时间25~30s� Tap the bottom of the iron ring with the sample on the solid object once, with the test surface facing the solid object. Then rotate the iron ring 180° and tap once again. Compare, rate and evaluate the sprayed sample surface with the standard chart. fabric water repellency �评价级别有5个等级,5级为好,1级为差� Level 5 – There are no water drops on the surface of the tested sample; Level 4 – There are slight wet spots on the surface of the tested sample; Level 3 – There are obvious rain drops on the surface of the tested sample; Level 2 – The tested sample has The sample surface is partially wet; level 1 – the tested sample surface is completely wet. �</p

</p

3. Rain method (rainproof tester)</p

</p

  雨淋法是模拟大雨时,测试织物露在空气中的拒水性。这个方法适用于任何经过或未经过拒水整理的织物。在不同的速度水的冲击强度下,测量单层织物或复合织物的抗冲击渗水性。测试结果与织物中的纤维、纱线、织物结构的拒水性能有关。其原理就是将测试样品包住已称重的吸水纸,测试结束后再次称量吸水纸,两次重量差就是样品的透水量。要求吸水纸测试前后质量差不超过1g;若是质量差大于5g,说明织物抗水性很差。

</p

  实验中用雨淋测试仪测试,AATCC 35-2006测试方法是将试样的后面放一个380px×380px的标准吸水纸,称重标准吸水纸,精确到0.1g� On a vertical rigid surface, clamp the sample to the sample holder, place the sample in the middle of the spray, 762.5px away from the nozzle, and spray (27±1)°C water flow directly to the test piece horizontally. Sample on, last 5 minutes �喷淋结束后,小心的取下吸水纸,迅速称重,精确至0.1g� �计算吸水纸在5min喷淋时间内重量的增加,取其测试数据的平均值� �若是大于5.0g,则报告为+5.0g或>5.0g� �</p

</p

4. Wicking method (capillary effect measuring instrument)</p

</p

  芯吸法是目前常用、简单地直接测试织物的吸水性方法� The test sample is usually cut into a long strip. One end of the test sample is suspended on an iron stand, and the other end is in contact with the water (or immersed in water to a certain height). After immersing for a certain period of time (f), the water climbs through the capillary tubes and fiber pores of the fabric are measured. height(h) �导水性好的织物,吸水性强,吸水速度(即芯吸速度)快,单位时间内爬升高度大,即导水高度高� �若是在测试过程中,由于织物结构、纤维、纱线和颜色的关系,水的爬升过程不是很明显,肉眼不能很好观察,此时可以在水中加入一点着色剂� �芯吸速度(v)在微观上取决于纤维的物理、化学性质和液体分子的热平衡过程;在宏观上取决于孔隙的形态与方向� �芯吸速度为水在单位时间内上升的高度值,即v(cm/s)=h/t� �导水性的强弱关系着芯吸速度的大小� �故可以用芯吸来测试织物的导水能力�

Extended reading: https://www.china-fire-retardant.com/post/9655 .html
Extended reading: https://www.china-fire-retardant.com/post/9380.html
Extended reading: https://www.yingjietex.com/product/Double-Color-Twill-OXFORD-Fabric.html
Extended reading�:https://www.alltextile.cn/product/product-0-985.html
Extended reading:https://www.yingjietex.com/product/Ottoman-Pongee-coated-breathable-Fabric.htm

Author: clsrich

 
TOP
Home
News
Product
Application
Search