Why is WVTR important?
Controlling moisture migration is crucial to maintaining the taste, texture, and overall quality of packaged food products. Increasing WVTR values indicate greater permeability, and lower ability to keep dry products dry, and moist products moist. …
What is MVTR testing?
Moisture vapor transmission rate (MVTR) also known as water vapor transmission rate is the process of measuring the amount of water that can permeate through a polymer package film or membrane on a square meter basis in 24 hours.
What is moisture vapour transfer?
Moisture vapor transmission rate, also called water vapor transmission rate (WVTR), is the amount of water vapor that passes through a substance or material over a specific period of time.
What is WVTR and OTR?
Oxygen Transmission Rate (OTR) is the measurement of the amount of oxygen gas that passes through a substance over a given time period. Moisture (Water) Vapor Transmission Rate (MVTR/WVTR) is the measurement of amount of water vapor that permeates through the substance over a given time period.
What does high WVTR mean?
When a product has a high WVTR, it means that the moisture permeates through the barrier material quickly. A prime example of this is in performance or athletic clothing. The fabrics normally used in this type of clothing have high water vapor transmission rates.
What is CC in OTR?
OTR (oxygen transmission rate) is the steady state rate at which oxygen gas permeates through a film at specified conditions of temperature and relative humidity. Values are expressed in cc/100 in2/24 hr in US standard units and cc/m2/24 hr in metric (or SI) units.
What is WVTR packaging?
Definition: Water Vapor Transmission Rate (WVTR) or Moisture Vapor Transmission Rate (MVTR) is the rate at which water vapor will permeate through solid material over a specific period of time. Rate in Packaging: When referring to packaging, WVTR is the rate at which water vapors will permeate the package wall.
What is a Bopp?
What Is BOPP? BOPP is a popular label material made of plastic. It stands for Biaxially-Oriented (BO) Polypropylene (PP). Biaxially-oriented refers to the production process that stretches the film over two directions, making it stronger and more transparent.