These highly permeable films have moisture vapor transmission rates
of 3,000 g/[m.sup.2] per day and higher.
It provides moisture barrier (moisture vapor transmission rate
) approaching that of foil or metallized films, does not require lamination or coating, and allows product visibility and metal detection."
The elastomer's moisture vapor transmission rate
(MVTR) is more than 10,000 grams per square meter per 24 hrs per mil of thickness, as measured by the inverted cup method.
In combination with highly breathable facestocks, vastly improved moisture vapor transmission rate
(MVTR) can be accomplished using Avery Dennison (AD2000 adhesive), a proprietary patent pending formulation.
Key parameters include the nature of the food product, the volume of space (consumer-size or foodservice package or bulk bin) being protected, volume of product, initial humidity, moisture content in the product post packaging, moisture vapor transmission rate
, and anticipated storage time.
The adhesive is pattern coated onto the urethane film, resulting in increased breathability and a high moisture vapor transmission rate
. The dressing is highly conformable to irregular surfaces and can be easily removed from skin.
Together with the right choice of carrier materials, the wide array of monomer building blocks available offers acrylic adhesives a great deal of flexibility for building in high moisture vapor transmission rates
to maintain breath-ability without the need for perforations.