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Wikipedia

Tyvek

Not to be confused with Tyvak.

Tyvek (/ˈtaɪ.vɛk/) is a brand of synthetic flashspun high-density polyethylene fibers. The name Tyvek is a registered trademark of the American multinational chemical company DuPont, which discovered and commercialized Tyvek in the late 1950s and early 1960s.

Tyvek
Product typeFlashspun nonwoven HDPE fiber
OwnerDuPont
CountryUnited States
IntroducedApril 1967; 57 years ago (1967-04)
Related brandsYUPO synthetic paper
MarketsConstruction, Packaging and labeling
TaglineWhat do you need to protect?
Websitedupont.com/Tyvek
Tyvek house wrap

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]

History

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Tyvek is a nonwoven product consisting of spun bond olefin fiber. It was first discovered in 1955 by a researcher for the DuPont textile company working in an experimental lab, who noticed a type of white fluff coming out of a pipe.[2] That fluff was a form of polyethylene, which DuPont requested a patent for within a year of the discovery. After technologies improved during the next few years, in 1959 DuPont discovered that when the fluff was spun at high speeds it produced a durable fabric that could be cut with a blade. While the product Tyvek was used since 1959, DuPont did not trademark the actual brand until 1965, making it available for commercial purposes in April 1967.[3] By 1970, Tyvek had reached the mainstream construction industry on both a national and global scale. Its products were often used for the construction of houses due to its ability to keep out liquid, while allowing vapor through.[4] In 1972, DuPont released Tyvek packaging for sterile instruments that were to be used by surgeons and doctors in the medical field.[5]

21st century

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In 2017, the DuPont company merged with another chemical company, The Dow Chemical Company to form DowDuPont. DowDuPont currently manufactures Tyvek at the Spruance plant in Richmond, Virginia, and in Sandweiler-Contern, Luxembourg. In 2018, DowDuPont announced plans to expand the Tyvek production capacity of the Sandweiler-Contern factory.[6]

Scientific characteristics and properties

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Tyvek USPS Express Mail envelope

Adhesion and bonding

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To bond Tyvek to both itself and a variety of substrates, DuPont recommends starch, dextrin, casein, and animal-based adhesives over most synthetic-based adhesives, emphasizing the effectiveness of water-based and quick-drying glues. DuPont also claims that the following adhesives are highly effective:

Heat sealing can be used to melt Tyvek and cause it to bond to itself, but this form of bonding tends to create puckers in the otherwise flat material. Dielectric bonding can be effective in some circumstances, as is ultrasonic welding.[7]

Recycling

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Though Tyvek superficially resembles paper (for example, it can be written and printed on), it is plastic, and it cannot be recycled with paper. Some Tyvek products are marked with the #2 resin-code for HDPE, and can be collected with plastic bottles as part of some municipal curbside recycling programs. DuPont runs a program in the United States where disposable clothing, coveralls, lab coats, medical packaging and other non-hazardous Tyvek disposable garments can be recycled, as well as providing a mail-in recycling program for envelopes.[8]

As plastic bag recycling has become more prevalent in the United States, the American Chemistry Council has recommended that plastic film drop-off recycling locations should be able to accept Tyvek.[9]

Properties of Tyvek

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According to DuPont's website, Tyvek fibers are 0.5–10 μm (2.0×10−5–0.000394 in) (compared to 75 μm (0.0030 in) for a human hair). The nondirectional fibers (plexifilaments) are first spun and then bonded by heat and pressure, without binders.[10]

Tyvek is also:

  • Lightweight
  • Has a Class 1 flammability rating. "When exposed to a flame, Tyvek (R) shrinks away rapidly. If the flame is made to follow the shrinking sheet, Tyvek (R) will melt at 275 F (135 C)" [11][12] and will burn at 750°F (400°C)[13]
  • Chemical-resistant
  • Dimensionally stabilized
  • Opaque
  • Has a neutral pH
  • Tear-resistant

Uses

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Construction/engineering

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Tyvek envelopes
  • Large sheets of Tyvek are frequently used as housewrap to provide an air barrier between the outer cladding of a structure and the frame, insulation, etc., allowing water vapor to pass but restricting air infiltration.[14]
  • Tyvek was used to cover and protect the Reaction Control System (RCS) thruster ports from water and debris, while the shuttle stack was exposed on the launchpad during the latter years of the Space Shuttle program.[15] The Tyvek covers were dislodged shortly after ignition and before the shuttle cleared the tower, posing no strike risk as the shuttle was travelling below 100 mph (160 km/h).[16]
  • Tom Sachs used Tyvek for the outer shell of the spacesuits used in his Space Program series of artworks.[17]

Shipping

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Government use

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Banknotes

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Fashion/personal use

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  • Race bibs, or race numbers are often produced on Tyvek paper, so they are less likely to rip during competition.[23]
  • Tyvek is often used in garment and other textile labeling due to high durability and washability.
  • Tyvek wristbands are used at festivals, conventions, and events where admission and security are concerns, as well as hospitals, resorts, nightclubs, schools, and reunions.
  • In 2011, fashion retailer and manufacturer American Apparel included white Tyvek shorts as part of its range.[24]
  • In 1976, fashion house Fiorucci made an entire collection out of Tyvek.[25]
  • The ultralight backpacking community has begun to use Tyvek for the construction of extremely light yet durable backpacks.[26][better source needed] In 2012, The Open Company released a foldable city map made of one of the stiffer variants of Tyvek.[27]
  • Increasingly, reused Tyvek material is being used by home crafters. Protective sleeves for CDs and DVDs, tote bags,[28] and origami wallets[29] also use Tyvek-containing materials.
  • Tyvek is also used as a durable fabric in shoes.[30][31]

Medical

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  • Tyvek is extensively used for laboratory and medical packaging as the material withstands conditions such as gamma irradiation or ethylene oxide gas which are used to sterilize equipment and surgical devices.[32][33]
  • NSW Police, Australia uses Tyvek overalls to preserve the integrity of forensic evidence at a crime scene, while also protecting "the wearer from the risk of exposure to biological substances, dirt and liquid splashes."[34]

Personal protective equipment (PPE)

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Tyvek coveralls
  • Tyvek coveralls are one-piece garments used for personal protective equipment. They are usually white, commonly worn by mechanics, oil industry workers, painters, insulation installers, and laboratory and cleanroom workers where disposable, one-time use coverall is needed. They are also used for some light HAZMAT applications, such as asbestos and radiation work, but do not provide the protection of a full hazmat suit. Tychem is a sub-brand of Tyvek rated for a higher level of liquid protection, especially from chemicals. DuPont makes Tyvek clothing in different styles from laboratory coats and aprons to complete head-to-toe coveralls with hoods and booties. The latter was notably used by the Japan Ground Self-Defense Force as emergency limited CBRN gear during the Fukushima nuclear incident.[35]
  • Tyvek coveralls, coats or bodysuits are often used during pandemics, for example in the 2013–2016 Western African Ebola virus epidemic, and in the COVID-19 pandemic, to protect health care workers from infection.[36][37] The Tyvek suits which are most frequently used during the COVID-19 pandemic are sold between $5-$15 USD per piece.[38] Due to a lack of sufficient stock of adequate PPE during the coronavirus crisis, Tyvek PPE became scarce in many places.[39][40] Tyvek bodysuits are generally meant for one-time use. However, Tychem suits contaminated with the virus SARS-CoV-2 can be disinfected and reused a limited number of times.[41]

See also

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References

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  1. ^ Coccolini, Federico; Perrone, Gennaro; Chiarugi, Massimo; Di Marzo, Francesco; Ansaloni, Luca; Scandroglio, Ildo; Marini, Pierluigi; Zago, Mauro; De Paolis, Paolo; Forfori, Francesco; Agresta, Ferdinando; Puzziello, Alessandro; d'Ugo, Domenico; Bignami, Elena; Bellini, Valentina; Vitali, Pietro; Petrini, Flavia; Pifferi, Barbara; Corradi, Francesco; Tarasconi, Antonio; Pattonieri, Vittoria; Bonati, Elena; Tritapepe, Luigi; Agnoletti, Vanni; Corbella, Davide; Sartelli, Massimo; Catena, Fausto (2020). "Surgery in COVID-19 patients: Operational directives". World Journal of Emergency Surgery. 15 (1): 25. doi:10.1186/s13017-020-00307-2. PMC 7137852. PMID 32264898.
  2. ^ admin. "Tyvek brand - For Greater Good". Archived from the original on 2007-12-07.
  3. ^ "DuPont Tyvek Marks 40 Years of Energy Efficiency and Protection". DuPont. Archived from the original on 2008-02-09.
  4. ^ "History of Weather Barrier". www2.dupont.com. Archived from the original on 2012-10-05. Retrieved 2018-11-28.
  5. ^ "DuPont Tyvek for Medical and Pharmaceutical Packaging" (PDF). www.dupont.com. Retrieved 2018-12-11.
  6. ^ "DuPont Announces $400 Million Tyvek Expansion". Nonwovens Industry Magazine - News, Markets & Analysis for the Nonwovens Industry. Retrieved 2018-12-11.
  7. ^ "Seaming and Sealing with DuPont Tyvek". DuPont. 2012. Retrieved 11 November 2013.
  8. ^ admin. "Recycling - DuPont Tyvek for Industrial Packaging - DuPont USA". Archived from the original on 2015-01-05.
  9. ^ "Plastic Film and Bag Recycling Collection: National Reach Study" (PDF). Moore Recycling Associates Inc.
  10. ^ Product Handbook for DuPont Tyvek
  11. ^ "DuPont™ Tyvek® CommercialWrap" Product Information Sheet.
  12. ^ "Material Safety Data Sheet TYVEK (R) SPUNBONDED OLEFIN (ALL STYLES)", DuPont Australia.
  13. ^ "DuPont™ Tyvek® CommercialWrap" Product Information Sheet.
  14. ^ DuPont: Tyvek Weatherization Systems archive Pdf
  15. ^ Rogers, Stuart E. (May 22, 2012). "Aerodynamics and Debris Transport for the Space Shuttle Launch Vehicle" (PDF). NASA Ames Research Center. Retrieved October 16, 2023.
  16. ^ Dashcam on a Space Shuttle - FRONT WINDOW launch. 2 March 2011. Archived from the original on 2021-12-22 – via YouTube.
  17. ^ Keats, Jonathon. "Artist Tom Sachs' DIY Space Program Is Outmaneuvering Elon Musk And NASA With Plywood And Tyvek". Forbes.
  18. ^ "Priority Mail Tyvek Envelope | USPS.com". store.usps.com. Retrieved 2023-10-23.
  19. ^ "Upgrading driver licences from paper to photo (Factsheet 54) - NZ Transport Agency". nzta.govt.nz.
  20. ^ Costa Rica Tyvek Envelopes
  21. ^ Isle of Man Bradvek Banknotes
  22. ^ Haitian Tyvek Banknotes 1980 and 1982 issues
  23. ^ "Race Bibs: A Buyer's Guide". Race Directors HQ. October 12, 2023. Retrieved October 16, 2023.
  24. ^ "Tyvek Short - Shop American Apparel". Archived from the original on 16 July 2011.
  25. ^ "What is Tyvek? Everything You Need to Know - Doranix". Doranix. 2017-06-20. Retrieved 2018-11-28.
  26. ^ McNall, Ralph. "Tyvek Backpack". Forum Post.
  27. ^ Doctorow, Cory (February 2012). "Clever-folding tyvek San Francisco map, with out-of-the-way landmarks". Blog Post. Boing Boing. Retrieved 5 September 2012.
  28. ^ "DuPont Tyvek for Disc Packaging Sleeves". Retrieved 2018-07-31.
  29. ^ How to make a Tyvek Wallet on YouTube
  30. ^ "The LIGHT WING - the UTLab Shoes Official Store | THEUTLAB.com". Archived from the original on 2013-06-28. Retrieved 2013-06-17.
  31. ^ "No Canvas, No Leather: A Reboot for the Sneaker". The New York Times. 31 August 2014.
  32. ^ "New Products and Services". Infection Control. 3 (4): 342–348. 1982. doi:10.1017/S0195941700056459. JSTOR 30146417. S2CID 249000467.
  33. ^ "Medical Device Packaging | DuPont Tyvek 1073B". DuPont USA. Archived from the original on 16 September 2018. Retrieved 2 July 2019.
  34. ^ workflow-process-service. "Crime scene protection with DuPontTM Tyvek | DuPont South Africa". www.dupont.co.za. Retrieved 2018-11-28.
  35. ^ Boosting SDF's Nuclear Accident Response Capabilities Archived 2016-03-05 at the Wayback Machine. Japan Security Watch. July 13th 2011. Accessed 11th October 2014.
  36. ^ "Protective Clothing for Ebola Virus Disease (EVD)" (PDF). www.dupont.com. 2014. Archived from the original (PDF) on February 25, 2015. Retrieved 1 June 2023.
  37. ^ "DuPont Response to Coronavirus Disease (Covid-19)".
  38. ^ Seema Mody (2020-02-21). "DuPont ramps up safety suit production as coronavirus causes shortages in China". CNBC.
  39. ^ "U.S. Appeals to Aid Recipients for Help in Fighting Coronavirus". 23 March 2020.
  40. ^ "Personal Protective Equipment Donations | Press Releases | County Administrator's Office | County of Sonoma".
  41. ^ "Cleaning Guidelines for DuPontTM Tychem® garments for COVID-19" (PDF).
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