What is water vapor transmission rate? Water vapor transmission rate (WVTR) is the rate of water vapor transmission through a material. It is measured in grams per square meter per day (g/m2/day) and is expressed as the amount of water vapor passing through a unit area in a unit time. The WVTR of a material is affected by its thickness, porosity, and water vapor permeability.
How do you test water vapor transmission rate? Testing water vapor transmission rate is a simple process. To do so, you will need a few supplies including a graduated cylinder, a beaker, and water. The graduated cylinder is used to measure the volume of water, while the beaker is used to hold the water and the test sample. First, fill the graduated cylinder with water and record the volume. Next, pour the water into the beaker and add the test sample. water vapor transmission rate tester Stir the water and allow it to sit for a few minutes so that the water can fully penetrate the sample. After a few minutes have passed, use the graduated cylinder to measure the volume of water that has been absorbed by the test sample. This value is the water vapor transmission rate.
What are some factors that affect water vapor transmission rate? There are many factors that can affect water vapor transmission rate, including the type of material, the thickness of the material, the humidity level, and the temperature. In general, the higher the humidity level and the higher the temperature, the faster the water vapor will transmission. Thin materials also tend to allow water vapor to transmission more easily than thick materials.
How do you use a water vapor transmission rate tester? Water vapor transmission rate (WVTR) testers are used to measure the rate at which water vapor passes through a material. WVTR testers can be used to measure the water vapor permeability of a material, which is a measure of how water vapor can pass through a material. WVTR testers can also be used to measure the water vapor transmission rate of a package or product.
