ISO 2431:2011 色漆和清漆 用流出杯测定流出时间

标准编号：ISO 2431:2011

中文名称：色漆和清漆 用流出杯测定流出时间

英文名称：Paints and varnishes — Determination of flow time by use of flow cups

发布日期：2011-11

标准范围

ISO 2431:2011规定了可用于控制稠度的色漆、清漆和相关产品的流动时间的测定方法。规定了四个尺寸相似但孔直径分别为3 mm、4 mm、5 mm和6 mm的流量杯。附录中给出了两种检查流量杯磨损的方法。ISO 2431不包括带有可更换喷嘴的流量杯，因为不符合向喷嘴供应试验材料的紧密公差。ISO 2431也未涵盖常用的浸渍流杯。一般来说，此类流量杯的制造公差大于ISO 2431中规定的流量杯的制造公差。因此，使用浸渍流动杯测定流动时间的精度低于ISO 2431中规定的流动杯测定流动时间的精度。该方法仅限于测试可以确定流量杯孔口流量断点的材料。对于流动时间接近测量范围上限（100 s）的材料，由于减速效应，很难确定和再现该点。

ISO 2431:2011 specifies a method for determining the flow time of paints, varnishes and related products that can be used to control consistency.Four flow cups of similar dimensions, but having orifice diameters of 3 mm, 4 mm, 5 mm and 6 mm, are specified. Two methods for checking the flow cups for wear and tear are given in an annex.Flow cups with a replaceable jet are not covered by ISO 2431 as the close tolerances on the supply of the material under test to the jet are not met.Commonly used dipping flow cups are also not covered by ISO 2431. In general, the fabrication tolerances for such flow cups are greater than those of the flow cups specified in ISO 2431. Therefore flow time determinations with dipping flow cups give a precision which is lower than that obtained with the flow cups specified in ISO 2431.The method is limited to testing materials for which the breakpoint of the flow from the orifice of the flow cup can be determined with certainty. This point is difficult to determine and reproduce for materials with flow times near the upper limit of the measurement range (100 s) due to slowing-down effects.

标准预览图