water-vapor transmission rate

См. также в других словарях:

• Moisture vapor transmission rate — (MVTR), also water vapor transmission rate (WVTR), is a measure of the passage of water vapor through a substance. There are many industries where moisture control is critical. Moisture sensitive foods and pharmeceuticals are put in packaging… …   Wikipedia

• Vapor barrier — 6 mil Polyethylene plastic sheet as vapor barrier between insulation and gypsum board …   Wikipedia

• Microwave transmission — The atmospheric attenuation of microwaves in dry air with a precipitable water vapor level of 0.001 mm. The downward spikes in the graph correspond to frequencies at which microwaves are absorbed more strongly, such as by oxygen molecules… …   Wikipedia

• WVTR — Water Vapor Transmission Rate (Academic & Science » Ocean Science) Water Vapor Transmission Rate (Academic & Science » Meteorology) Water Vapor Transmission Rate (Academic & Science » Chemistry) …   Abbreviations dictionary

• WVTRA — Water Vapor Transmission Rate Analyzer (Academic & Science » Chemistry) Water Vapor Transmission Rate Analyzer (Academic & Science » Meteorology) Water Vapor Transmission Rate Analyzer (Academic & Science » Ocean Science) …   Abbreviations dictionary

• Permeation — Permeation, in physics and engineering, is the penetration of a permeate (such as a liquid, gas, or vapor) through a solid, and is related to a material s intrinsic permeability. Permeability is tested by permeation measurement, for example by a… …   Wikipedia

• WVTR — WVRT can refer to:* Water vapor transmission rate * WVTR (FM), an FM radio station licensed to Marion, Virginia …   Wikipedia

• WVTR — abbreviation water vapor transmission rate …   Useful english dictionary

• Hermetic seal — Airtight redirects here. For the G.I. Joe character, see Airtight (G.I. Joe). For other uses of hermetic , see hermetic (disambiguation). A hermetic seal is the quality of being airtight. In common usage, the term often implies being impervious… …   Wikipedia

• Metallised film — Metallised films used for food packaging Metallised films (or metallized films) are polymer films coated with a thin layer of metal, usually aluminium. They offer the glossy metallic appearance of an aluminium foil at a reduced weight and cost.… …   Wikipedia

• Housewrap — defines all synthetic replacement materials for sheathing tar paper. These materials are all lighter in weight and usually wider than asphalt designs, so contractors can apply the material much faster to a house shell. Housewrap functions as a… …   Wikipedia