Plastics. Artificial weathering including acidic deposition
塑料 包括酸性沉积在内的人工风化
发布日期:
2017-03-17
BS EN ISO 29664:2017描述了人工风化试验,旨在评估在严重污染的室外环境中使用的塑料。本国际标准的结果不能用于预测这些塑料的使用寿命。本国际标准描述了两种不同的暴露方法。这些方法的使用取决于被评估的塑料产品的形式。方法A适用于表面降解非常重要的产品,并使用短时强酸喷雾(pH 1,5)。
方法B使用弱酸性喷雾(pH值3,5),长期喷洒,使其能够深入产品,适用于土工布和相关产品等产品。本国际标准不包括农用化学品等特殊化学品的影响。交叉引用:ISO 291ISO 4582ISO 4892-1ISO 4892-2ISO 4892-3ISO 483ISO 294-3ISO 175包含以下内容:勘误表,2017年3月
BS EN ISO 29664:2017 describes artificial weathering tests intended to evaluate plastics for use in heavily polluted outdoor environments.Results from this International Standard cannot be used to predict the service life of these plastics.This International Standard describes two different exposure methods. Use of the methods depends on the form of the plastic product being evaluated. Method A is intended for products where surface degradation is very important and uses a strong acid spray (pH 1,5) that is applied for a short time.Method B uses a weaker acid spray (pH 3,5) that is applied over a long period of time so that it can penetrate deeply into the product and is intended for products such as geotextiles and related products. This International Standard does not cover the influence of special chemicals like agrochemicals.Cross References:ISO 291ISO 4582ISO 4892-1ISO 4892-2ISO 4892-3ISO 483ISO 294-3ISO 175Incorporates the following:Corrigendum, March 2017