ISO 16533:2014 pdf free

ISO 16533:2014 pdf free.Textiles – Measurement of exothermic and endothermic properties of textiles under humidity change
ISO 16533  specifies a method for the measurement of exothermic and endothermic properties by moisture absorption and desorption in sheet-like textiles, e.g. fabrics, knit or nonwovens for clothing, bedding, upholstery, and similar textile products.
2 Normative references
ISO 16533 documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 3696:1987, Water for analytical laboratory use一Specification and test methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 exothermic property
property of material whereby it releases heat to the surroundings
3.2 endothermic property
property of material whereby it absorbs heat from the surroundings
3.3 hygroscopic and exothermic property
property of material whereby it generates heat by absorbing moisture and releases the generated heat to its surroundings where relative humidity changes from low to high over time
3.4 hygroemissive and endothermic property
property of material whereby it loses heat and cools down by releasing moisture through evaporation to its surroundings where relative humidity changes from high to low over time
5 Principle
A test specimen is placed in a low humidity atmosphere and then exposed to a high humidity atmosphere,and then the other way round. The temperature of the test specimen is measured over time with a temperature sensor. The exothermic and endothermic properties of the test specimen are determined from the difference in temperature measured with the temperature sensor, between a test with and another without the test specimen mounted on the sensor probe.
6 Apparatus
6.1 Testing apparatus, composed of a temperature and humidity controlled chamber and small containers in which the hurmidity is controlled by chemicals and the test specimens are set through the rubber plugs as shown in Figure 1.ISO 16533 pdf download.