ISO/TR 20659-1:2024 流变试验方法 基本原理和实验室间比对 第1部分：屈服点的测定

标准编号：ISO/TR 20659-1:2024

中文名称：流变试验方法 基本原理和实验室间比对 第1部分：屈服点的测定

英文名称：Rheological test methods — Fundamentals and interlaboratory comparisons — Part 1: Determination of the yield point

发布日期：2024-03

标准范围

本文件提供了使用流变试验方法测定屈服点的实验室间比较信息。屈服点是剪应力？τ低于该值，材料不会流动。本文档提供了应用领域的示例，其中重要的材料特性借助于屈服点来表征。这些应用领域包括:—？流变添加剂的有效性；—？保质期(例如关于沉淀、分离和絮凝)；—？静止时结构的稳定性；—？开始泵送时的行为；—？用于刮刀系统；—？湿膜厚度；—？流平和下垂行为(例如没有刷痕或下垂形成)；—？效果颜料的取向。

This document gives information on an interlaboratory comparison for the determination of the yield point, using rheological test methods. The yield point is the shear stress τ below which a material does not flow.

This document provides examples of fields of applications, in which important material properties are characterized with the aid of the yield point. These fields of application include:

—    effectiveness of rheological additives;

—    shelf life (e.g. with regard to sedimentation, separation and flocculation);

—    stability of the structure at rest;

—    behaviour when starting to pump;

—    use in scraper systems;

—    wet-film thickness;

—    levelling and sagging behaviour (e.g. without brushmarks or sag formation);

—    orientation of effect pigments.

标准预览图