ISO 2431:2019 色漆和清漆 用流出杯测定流出时间

标准编号：ISO 2431:2019

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：2019-06

标准范围

本文件规定了可用于控制一致性的色漆、清漆和相关产品流动时间的确定方法。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。给出了两种检查流量杯磨损的方法（见附录A）。本文件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。本文件也不包括常用的浸渍流杯。注:由于此类流量杯的制造公差大于本文件中规定的流量杯的制造公差，使用浸渍流量杯测定流量时间的精度低于使用本文件中规定的流量杯获得的精度（见第9条）。本文件中描述的方法仅限于测试材料，可以确定从流量杯孔流出的流量断点。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。

This document 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 (see Annex A).Flow cups with a replaceable jet are not covered by this document 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 this document.NOTE Since the fabrication tolerances for such flow cups are greater than those of the flow cups specified in this document, flow time determinations with dipping flow cups give a precision which is lower than that obtained with the flow cups specified in this document (see Clause 9).The method described in this document 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