Water vapour transmission tester

The Water Vapor Transmission Tester is useful for quality testing. It measures the WVTR - Water Vapor Transmission Rate. Its applications include paper, board, plastics, aluminium, rubber, etc.

It is also known as water vapor transmission rate (WVTR) or moisture vapor transmission rate (MVTR).

This machine is best for R&D, academic research, factories. As well as industrial quality testing.The Water Vapor Transmission Tester complies to ISO standards. Thus, it is suitable for testing quality of your products.

Test Principle:

The WVTR is the mass of water vapor transmitted through a unit area in a unit time. This is under specified conditions of temperature and humidity. Its usually expressed in grams per square meter per day g/(m .d). Above all, WVTR is a key characteristic to specify sheet materials in the packaging industry.

test method:

To conduct the test, add distilled water to the dry and clean moisture-permeable cup, seal the cup with a pre-treated sample, and place it in the test chamber. By controlling the temperature and humidity, the distilled water in the moisture-permeable cup evaporates, and the resulting water vapor passes through the film.

The drying device absorbs and measures the weight of distilled water in the moisture-permeable cup over time, allowing the determination of parameters such as the moisture permeability of the sample. This process is crucial for assessing the efficiency of the Single Cell Water Vapor Permeability Tester.

Applications：

1.Films

Including plastic films, plastic composite films, paper-plastic composite films, geomembranes, coextruded films, aluminized films, aluminum foils, aluminum foil composite films, breathable water-proof films and many other film materials

2.Sheeting

Including engineering plastics, rubber, waterproof building materials and thermal insulation materials, e.g. PP, PVC, PVDC and nylon

3.Paper, Paperboard

Including paper and paper board

Standards：

ISO 2528 - Sheet materials — Determination of water vapour transmission rate (WVTR) — Gravimetric (dish) method;

TAPPI T448 - Water vapor transmission rate of paper and paperboard at 23°C and 50% RH , Test Method T 448 om-17;

DIN 53122 - Determination of the water vapour transmission rate of plastic film, rubber sheeting, paper, board and other sheet materials by gravimetry;

ASTM E96 - Standard Test Methods for Water Vapor Transmission of Materials;

ASTM D1653 - Standard Test Methods for Water Vapor Transmission of Organic Coating Films;

Features：

Options: Additional testing dishes；

Characteristics: Indicated for sheeted materials with transmission rate above 1g/(m3.d) and thickness up to 3mm;

Enables preparation of 4 simultaneous sets;

High efficiency, precision and repeatability;

All parts in contact with water vapour and moisture are made of corrosion resistant materials;

Connections: Electrical: 220/240 VAC @ 50 HZ;

Dimensions: H: 300 mm W: 740 mm D: 270 mm Weight: 21 kg;

Textile Water Vapor Transmission Tester