Ads
related to: moisture permeation testtemu.com has been visited by 1M+ users in the past month
- The best to the best
Find Everything You Need
Enjoy Wholesale Prices
- Our Picks
Highly rated, low price
Team up, price down
- Biggest Sale Ever
Team up, price down
Highly rated, low price
- Women's Clothing
Limited time offer
Hot selling items
- The best to the best
Search results
Results from the WOW.Com Content Network
Moisture vapor transmission rate (MVTR), also water vapor transmission rate (WVTR), is a measure of the passage of water vapor through a substance. It is a measure of the permeability for vapor barriers. There are many industries where moisture control is critical.
The permeation of films and membranes can be measured with any gas or liquid. One method uses a central module which is separated by the test film: the testing gas is fed on the one side of the cell and the permeated gas is carried to the detector by a sweep gas.
Two fabrics may have a B1 of 10,000gr, but one can be 10,000 A1 and the other 4,000 A1. It all depends on the type of coating or lamination and how it moves moisture. Typically hydrophobic coatings perform better than hydrophilic laminations on the Ret and A1 Test. And vice versa, the hydrophilic laminations will perform better on the B1 test.
Materials have a moisture vapor transmission rate (MVTR) that is established by standard test methods. One common set of units is g/m 2 ·day or g/100in 2 ·day. Permeability can be reported in perms , a measure of the rate of transfer of water vapor through a material (1.0 US perm = 1.0 grain/square-foot·hour· inch of mercury ≈ 57 SI perm ...
Water vapor transmission rate, also called moisture vapor transmission rate (MVTR) is a method of testing or measuring the permeability for vapor barriers. ASTM F2298 – 03 (test for clothing materials such as protective clothing, laminates, and membranes) a similar test by Japanese Standards Association is JSA – JIS L 1099. [29]
A practical unit for permeability is the darcy (d), or more commonly the millidarcy (md) (1 d ≈ 10 −12 m 2). The name honors the French Engineer Henry Darcy who first described the flow of water through sand filters for potable water supply. Permeability values for most materials commonly range typically from a fraction to several thousand ...
Ads
related to: moisture permeation testtemu.com has been visited by 1M+ users in the past month