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Tyvek house wrap.
Tyvek USPS express mail envelope.
Tyvek (TIE-veck) is a brand of flashspun high-density polyethylene fibers, a synthetic material; the name is a registered trademark of DuPont. The material is very strong; it is difficult to tear but can easily be cut with scissors or any other sharp object. Water vapor can pass through Tyvek (highly breathable), but not liquid water, so the material lends itself to a variety of applications: medical packaging, envelopes, car covers, air and water intrusion barriers (housewrap) under house siding, labels, wristbands, mycology, and graphics. Tyvek is sometimes erroneously referred to as "Tyvex."
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Tyvek is a nonwoven product consisting of spunbond olefin fiber. It was first discovered in 1955 by Dupont researcher Jim White who saw polyethylene fluff coming out of a pipe in a DuPont experimental lab. It was trademarked in 1965 and was first introduced for commercial purposes in April 1967.
According to Dupont's website, the fibers are 0.510 ?m (compared to 75?m for a human hair). The nondirectional fibers (plexifilaments) are first spun and then bonded together by heat and pressure, without binders.
Tyvek is used by the United States Postal Service for some of its Priority Mail and Express Mail packages. New Zealand used it for its driver's licences from 1986 to 1999, and Costa Rica, the Isle of Man, and Haiti have made banknotes from it. These banknotes are no longer in circulation and have become collectors items.
Many lightweight backpackers are now using homemade Tyvek groundcloths, finding that they are lighter, cheaper, and pack smaller than the traditional blue plastic tarps.
Tyvek coveralls are one-piece jumpsuits made of Tyvek, usually white in color. They are often worn by mechanics over their clothes to avoid contact with oil and fuel. They can also be worn for painting to protect skin and clothes from splattered paint, for installation of fiberglass insulation, by workers in laboratories and clean rooms, and any other use where a disposable, one-time use coverall is needed. Tyvek coveralls are also used for some light hazardous materials applications but do not provide the level of protection of a full hazmat suit. Tychem is a sub-brand of Tyvek rated for a higher level of protection. DuPont makes Tyvek clothing in different styles from lab coats and aprons to complete head-to-toe coveralls with hoods and booties. In 1976, fashion house Fiorucci made an entire collection out of Tyvek, while rock band Devo is known for wearing large two piece suits with black elastic belts and 3D glasses. In 1979 Devo came out with a leisure suit, shirt and pants, which were made out of Tyvek, and made specifically for the band with designs and images from the band.
Large sheets of Tyvek are frequently used as "house wrap", to provide a water barrier between the outer cladding of a structure and the frame, insulation, etc. It also serves as a windbreaker.
Tyvek can also be used to make CD and DVD sleeves, due to its useful properties that give the disc sufficient protection. Netflix in USA, glorimedia.de in Germany and LOVEFiLM use Tyvek sleeves for mailing their rental DVDs.
Tyvek is manufactured at the Spruance plant in Richmond, Virginia, and in Luxembourg.
Though Tyvek superficially resembles paper (for example, it can be written and printed on), it is plastic, and it cannot be recycled with paper. And despite the fact that some Tyvek products are marked with the #2 resin-code for HDPE, it is not usually collected with plastic bottles as part of municipal curbside recycling programs. Instead, DuPont runs a program in the United States where disposable clothing, coveralls, lab coats, and other Tyvek disposable garments can be recycled, as well as providing a mail-in recycling program for envelopes.
^ Tyvek History - Dupont.com
^ DuPont Tyvek Marks 40 Years of Energy Efficiency and Protection - June 19, 2007 - repanet.de
^ Product Handbook for DuPont Tyvek
^ "Memoribilia:Fiorucci's Steps". Fiorucci Design Office S.r.l.. 2004. http://www.fiorucci.it/2004/eng/hp_eng.htm. Retrieved on 2008-04-29.
^ DuPont: Tyvek Weatherization Systems
What is Tyvek
DuPont home page
Tyvek FAQ at DuPont
Tyvek Envelope Recycling Program
Tyvek Hard Structure and Soft Structure - What the difference?
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