SIST ISO 2528:2018 PDF
Sheet materials -- Determination of water vapour transmission rate (WVTR) -- Gravimetric (dish) method
Sheet materials -- Determination of water vapour transmission rate (WVTR) -- Gravimetric (dish) method
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 20
- Дата публикации:
- 24 августа 2018 г.
- ICS:
- 85.060
- Технический комитет:
- VPK - Pulp, paper, board and products
ISO 2528:2017 specifies a method for the determination of the water vapour transmission rate (often erroneously called "permeability") of sheet materials. This method is not generally recommended for use if the transmission rate is expected to be less than 1 g/m2 per day or for materials thicker than 3 mm. In such cases the method specified in ISO 9932 is preferred. The method cannot be applied to film materials that are damaged by hot wax or that shrink to an appreciable extent under the test conditions used. For some purposes it may be necessary to determine the transmission rate of creased material; a procedure for this is given in Annex A.
Abstract
Overview
ISO 2528:2017 defines the gravimetric (dish) method for measuring the water vapour transmission rate (WVTR) of sheet materials. Often miscalled “permeability,” WVTR is the mass of water vapour transmitted through a unit area in a unit time, typically expressed in g/(m²·d). The method uses dishes containing a desiccant sealed by the test material and records mass gain over time in a controlled atmosphere to calculate WVTR.
Key topics and technical requirements
- Scope & limitations
- Intended for sheet materials such as paper, board, plastic films, laminates and coated fabrics.
- Not generally recommended if expected WVTR
Технические детали
- SKU
- SIST ISO 2528:2018
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