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CENELEC发布CLC/TS 50677:2019新标准,有助于确定洗衣机和洗衣烘干两用机的漂洗效果

发布时间: 2019-05-15 09:13:46   审校:睿智  

倘若你思考一下你是如何度过周末的,很可能至少有一部分时间是花在洗衣服上的。实际上,洗衣机和洗衣烘干两用机也是我们家中最常见的电器:它们的外形各异,也能满足客户的不同需求,而学会如何正确洗衣服需要花费一定的时间。至少,我们都曾面临一些困扰:如何将有衣物和白色衣物正确地分开;为了不破坏衣物而应使用哪种最佳程序。另一种担忧则是该如何知道我们的衣物已被清洗干净。

由于最近发布的CLC/TS 50677:2019“家用及类似用途洗衣机和洗衣烘干两用机——通过衡量织物材料表面活性剂含量而确定清洗效果的方法”,因此有可能确定清洗效果。

根据其名称,该技术规范着重于家用洗衣机、洗衣烘干两用机和工业洗衣机的漂洗效果,提供了一种通过衡量织物材料表面活性剂含量而测定漂洗效果的方法。该方法的工作原理详见技术规范文本:这主要是基于确定残留的直链烷基苯磺酸盐(LAS)表面活性剂的量,LAS这种化学物质是大多数洗涤剂的关键成分,该方法是通过测定LAS残留物在特定波长处的紫外光吸光度而确定其含量,而残留物是从洗衣性能测试所用的未受污染的测试样本中提取。

假设LAS的量与洗涤剂混合物的量存在一种固定的线性关系,并利用此程序中形成的浓度与吸光度曲线,那吸光度的数值可被转换成洗涤剂的浓度,而洗涤剂的浓度反过来也可被用于表示经紫外光吸光度测量方法确定的LAS的量(以洗涤剂的量表示)。通过已形成的浓度与吸光度曲线,吸光度的数值也可被转换成织物经洗涤后的洗涤剂浓度,这也可以用于表示清洗效果。

通过提高制造商的测试能力,CLC/TS 50677标准有助于提升洗衣机的效能,降低用户的洗衣成本,使环境更具有可持续性。另一方面,对于正确区分有色衣物,并没有可以提供帮助的标准——至少目前还没有!

CLC/TS 50677:2019是由CLC/TC 59X“家用和类似用途电器的性能”制定,其秘书处目前是由德国电工委员会(DKE)——德国标准化协会(DIN)和德国电气工程师协会(VDE)建立的德国电子、电气和信息技术委员会承担。想获悉更多的国内外标准信息,请访问中国标准信息服务网(<https://www.sacinfo.cn>)。

New CENELEC standard: CLC/TS 50677:2019 helps determine the rinsing effectiveness of clothes washing machines and washer-dryers

If you think about how you spend your time during weekends, it is highly likely that at least part of it is dedicated to doing the laundry. Indeed, washing machines and washer-dryers are probably among the most common electric apparel in our households: they come in all shapes and for all tastes, and learning how to wash clothes properly can take some time. All of us have at least once worried about correctly separating coloured and white clothes, or about the best programme to use in order not to ruin them. Another specific worry is to know that our clothes have been properly rinsed.

The determination of rinsing effectiveness is possible thanks to the recently published CLC/TS 50677:2019 ‘Clothes washing machines and washer-dryers for household and similar use - Method for the determination of rinsing effectiveness by measurement of the surfactant content at textile materials’.

As per its name, this Technical Specification focusses on the rinsing effectiveness of household washing machines, washer dryers and commercial washing machines, providing a method for testing it by measuring the surfactant content at textile materials. How the method works is detailed in the TS’ text: basically, it is based on determining the amount of residual linear alkylbenzene sulfonate surfactant (LAS),a chemical which is a key ingredient in most detergents by measuring the UV light absorbance at the wavelength particular to the amount of residual LAS, extracted from the unstained test swatches of the strips used in the washing performance test.

Assuming a fixed linear relationship between LAS amount and quantity of detergent mixture and using a concentration versus absorbance curve developed as part of this procedure, the absorbance values are then converted into detergent concentrations, which in turn are used to express the amount of LAS as determined by UV light absorbance measurements in terms of a detergent amount. Through the concentration vs. absorbance curve developed, the absorbance values can then be converted into detergent concentrations in the tissues after they have been washed, thus indicating the rinsing effectiveness.

By improving the testing capabilities of manufacturers, CLC/TS 50677 contributes to increasing the efficiency of washing machines, making laundry less costly for users and more sustainable for the environment. For correctly separating colours, on the other hand, there is no standard that can help – at least for now!

CLC/TS 50677:2019 has been developed by CLC/TC 59X ‘Performance of household and similar electrical appliances’. Its Secretariat is currently held by DKE, the German Commission for Electrical, Electronic and Information Technologies of DIN and VDE.


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