Zylon

Source: Wikipedia, the free encyclopedia.
Not to be confused with Cylon (disambiguation) or Zyklon (disambiguation).
Zylon
Skeletal formula of a Zylon monomer
Names
IUPAC name
poly(p-phenylene-2,6-benzobisoxazole)[1]
Identifiers
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Zylon (

synthetic polymer material was invented and developed by SRI International in the 1980s and manufactured by Toyobo.[2] In generic usage, the fiber is referred to as PBO.[3]

Zylon has 5.8

Martian rovers
are some of the better-known instances.

Usage

Body armor

Zylon gained wide use in U.S.

ballistic vests for law enforcement.[7]

The

Honeywell International in late 2022.[8]

Space elevator research

A competition was held in the

Wirefly X Prize Cup in Las Cruces, New Mexico, US, on October 20–21, 2006. A team from the University of British Columbia entered into the Tether Challenge, using a construction made from Zylon fibers. The house tether used by Spaceward, that the other teams would have to beat in strength by 50% in the 2007 Spaceward games,[9]
was made of Zylon.

High-altitude balloon science

Zylon is used by NASA in long-duration, high-altitude data collection. Braided Zylon strands maintain the structure of polyethylene superpressure balloons. Zylon is the material of choice due to its low weight, high tensile strength, and thermal properties.[10]

Motorsport

Since 2001 Zylon tethers are used in

2008.[13]

Standing rigging

On modern racing yachts, Zylon is used for parts of the standing rigging. It is used as shrouds and stays. The PBO (polybenzoxazole) fiber is degraded by UV light, seawater, and chafing (the problem that caused Zylon to be removed from usage in protective vests for police usage, as shown above), and is therefore protected by a synthetic melted-on jacket. It is claimed to be 65% lighter than traditional rigging at 110–130% of the price of rod rigging.[14] Based on laboratory tests, superior durability is also claimed.

Parachutes

SpaceX uses Zylon for the suspension lines on their Mk3 parachutes. Four Mk3 parachutes serve as the main parachutes on each of SpaceX's human-rated Crew Dragon spacecraft.[15]

Conductive textile

Zylon has been incorporated as the base fiber for some conductive textiles, where the Zylon fiber is plated with nickel, copper, silver, or gold. The conductive fiber is used for electronic textiles, EMI shielding in woven or knit sheets, or as a braid over wires, and for signal transmission or current conduction. This conductive fiber combines the advantages of Zylon (strength, resistance to high temperatures, durability, lightweight, etc.) with the electrical properties of various metals. The conductive yarns can be sewn, braided, knit, or simply insulated like a bare wire.[16]

Structural rehabilitation

PBO is the strongest and stiffest of commercially available fibers used to repair and strengthen concrete and masonry structures in externally bonded composite systems.

cementitious
mortar matrix bonds this to an existing structure.

Loudspeakers

Yamaha uses Zylon to make the speaker cones for its top-of-the-line NS-5000 speaker.[18]

Bicycle & wheelchair wheel spokes

Spinergy, Inc. produces wheels for bicycles and wheelchairs with PBO spokes. They claim their PBO fiber spokes act as a vibration and shock damper, while being lighter and stronger than steel spokes.[19]

See also

References

  1. ^ Compendium of Polymer Terminology and Nomenclature - IUPAC Recommendations 2008 (PDF). Retrieved 2018-08-28.
  2. ISBN 978-0974520810
    .
  3. ^ Abegaz, Adane Z. (2013-12-18). Advanced Fiber Reinforced Composites as Confining Systems for RC Columns (Thesis). University of Miami Scholarly Repository. p. 7.
  4. ^ Toyobo Co., Ltd. "Zylon® (PBO fiber)" (free download PDF) (Technical Information).
  5. ^ "Zylon". Policeone.com. Retrieved 2014-03-20.
  6. ^ "New Jersey News". Archived from the original on 2016-03-03. Retrieved 2022-06-02.
  7. ^ "NIJ Journal Issue No. 254: Body Armor Safety Initiative".
  8. ^ "Honeywell to Pay $3.35 Million for Alleged False Claims for Zylon Bullet Proof Vests". 26 October 2022.
  9. ^ Little, Brian (2007-10-19). "Spaceward Games 2007 | GeekDad". Wired. Wired.com. Retrieved 2014-03-20.
  10. doi:10.1016/j.asr.2005.04.098
    .
  11. ^ Formula One press release. "FIA Rules & Regulations Sporting Regulations 2007". Archived from the original on 2007-01-26. Retrieved 2007-01-29.
  12. ^ "Super Visor - Formula One helmets become even safer". Formula1.com. 2011-03-30. Archived from the original on 2013-08-25. Retrieved 2011-03-30.
  13. ^ "Indy-Car Upgrades Planned For 2008, '09". AutoWeek.com. 2007-09-07. Retrieved 2007-09-17.
  14. ^ "powerliterigging.com". powerliterigging.com. Retrieved 2014-03-20.
  15. ^ "Elon Musk and NASA chief give an update on SpaceX's astronaut spacecraft". YouTube. 2019-10-10. Archived from the original on 2021-12-12.
  16. ^ "Metal Clad Fiber - AmberStrand® Fiber". metalcladfibers.com. Retrieved 2017-06-15.
  17. ^ Tumialan, Gustavo; De Luca, Antonio (Sep 2014). "FRCM Systems". Structure Magazine.
  18. ^ "NS-5000 Technology". yamaha.com. Retrieved 2022-03-10.
  19. ^ "Spinergy PBO spokes". spinergy.com. Retrieved 2023-06-28.

External links

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