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Tyvek's properties—such as being difficult to tear but easily cut, and waterproof against liquids while allowing water vapor to penetrate—have led to it being used in a variety of applications. Tyvek is often used as housewrap, a synthetic material used to protect buildings during construction, or as personal protective equipment (PPE). [1]
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.
Although what is generically referred to as the NATO Strap or NATO G10 Strap entered the market in the early 1970s, and both terms had already been ubiquitous in the watch world for many decades, a US company (International Watchman Inc) managed to trademark the word NATO in 2011 (TM 3907646) and NATO-G10 (TM 4093914) in January 2012 under product class IC 14: Watches, Watch Straps.
An alternative polymer of polyethylene fibres marketed as Tyvek by DuPont was developed for use as currency by the American Bank Note Company in the early 1980s. Haiti: 1982 Haiti released Tyvek-made Gourde banknotes in denominations of 1, 2, 50, 100, 250 & 500. The same denominations and a 5 Gourdes banknote were also released on paper.
The wristbands have also become a popular tool used in fundraising, as both the wider and thinner bands are cheap to custom manufacture. [ 6 ] [ 7 ] The price of these wristbands varies depending on the particular campaign but is often $1 or £1, and the majority of the money usually goes towards the charity or cause involved.
The original Slap Wraps were 23 cm (9.1 in) in length, 2.5 cm (0.98 in) wide, and made of steel 0.15 mm (0.0059 in) thick. Some knockoff versions used thinner steel, which was more likely to break and/or cut the wearer, the dangers of which first came to light in 1990, soon after they were released.
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