Contact person
Helena Hjärtnäs
Forsknings- och utvecklingsingenjör
Contact Helena
Resistance to surface wetting (spray test) according to SS-EN ISO 4920
Some textiles are given an increased product performance by adding a water-repellent treatment to their functional surfaces. The method can be used to assess the effectiveness of such finishing.
At our Textile Laboratory, "spray test" is one of the methods we can offer to evaluate water-repellent ability.
Purpose
The method aims to analyse the ability of fabrics to reject water.
For materials that are to have a water-repellent surface, the method is a guide for assessing the suitability of the material for its intended application. The higher the class, the better the material resists splashes of water and water-like liquids.
The method can also be used to compare different treatments and provide information about the durability of such a treatment after, for example, washing.
The method is not intended to be used to evaluate waterproof properties of fabrics, as it does not measure the penetration of water through the fabric
Method
A specified volume of distilled or fully deionized water is sprayed on a test specimen that has been mounted
on a ring, placed at an angle of 45° so that the centre of the specimen is at a specified distance below the spray nozzle. The spray rating is determined by comparing the appearance of the specimen with a rating scale in text and a photo scale.
3 test specimens/material are required.
Deliveries
A report in Swedish or English with the received results.
