Ethylene tetrafluoroethylene (ETFE) is a fluorine-based plastic. It was designed to have high corrosion resistance and strength over a wide temperature range. ETFE is a polymer and its source-based name is poly(ethene-co-tetrafluoroethene). ETFE has a relatively high melting temperature, excellent chemical, electrical and high-energy radiation resistance properties. When burned, ETFE releases hydrofluoric acid.

1. Ethylene tetrafluoroethylene
Akhil Goyal (15110002)
Amit Anand (15110003)
Modern World Architecture AR-210

2. • Ethylene tetrafluoroethylene (ETFE) is a fluorine-
based plastic.
• It was designed to have high corrosion resistance and
strength over a wide temperature range.
• ETFE is a polymer and its source-based name is
poly(ethene-co-tetrafluoroethene).
• ETFE has a relatively high melting temperature, excellent
chemical, electrical and high-energy radiation resistance
properties.
• ETFE has an approximate tensile strength of 42 MPa (6100
psi), with a working temperature range of 89 K to 423
K (−185 °C to +150 °C or −300 °F to +300 °F)

3. HISTORY, THE INDUSTRIAL REVOLUTION
When Roy Plunkett worked at DuPont in the 1930s, his team accidentally
invented PTFE (polytetrafluoroethylene), which became Teflon. The
company, who considers themselves a "pioneer of polymer
science with a legacy of innovation" is said to have created
ETFE as an insulation coating for the aerospace industry.
The tensile architecture of German Frei Otto in the 1960s and 1970s was
an inspiration for engineers to come up with the best material to use for
what builders and architects call "cladding" or the material that we might
call exterior siding. The idea for ETFE as a film cladding
came in the 1980s.

4. Mangrove Hall Burgers’ Zoo Arnhem, Netherlands by Dr Van Hof
The first ETFE foil structure in
the world and it surpassed
performance expectations.
High levels of visible light and
ultraviolet UV-A light are
essential for plant growth.
This leads to a so-called
bactericidal effect of light
transmission, a natural
phenomenon that kills
bacteria, which means that
plants thrive as if they were in
their natural environment.

5. Beijing National Aquatics Center, The Water Cube
The Water Cube's exterior
cladding is made of 4,000 ETFE
bubbles, some as large as 9.14
meter across, with seven different
sizes for the roof and 15 for the
walls.
It is the largest ETFE clad
structure in the world with over
100,000 m² of ETFE pillows.
The ETFE cladding, allows more
light and heat penetration than
traditional glass, resulting in a
30% decrease in energy
costs.

6. Radclyffe School by Architen Landrell
The atrium area, which forms
the intersection of five school
buildings, needed to be
covered for one simple reason
to provide an open but dry
space for students and staff to
gather, socialize and learn.
Without a requirement for
insulation, with a need to keep
costs down and with a desire
to maintain natural light,
single ply ETFE provided a
good solution.

7. The Khan Shatyr Entertainment Centre by Foster + Partners
Temperatures in Astana can
drop to -35 degrees
Celsius in winter and climb as
high as +35 degrees in
summer.
The three-layer ETFE
envelope is designed to
shelter the enclosed
accommodation from weather
extremes and to allow daylight
to wash the interiors.

8. ,
Media-TIC building , Barcelona by Enrique Ruiz Geli
Looking for the eco-efficiency of the
building, it is covered with ETFE skin of
2500 m², which will achieve an energy
saving of 20% and will get 42
points out of the 57 maximum
points marked by the decree of
Environmental Criteria and Energy
Efficiency of Buildings.
The ETFE skin on the face of the
"cushions", is composed of inflatables
that have up to three air
chambers. This not only improves the
thermal insulation, but also allows the
creation of shade through a
pneumatic system.

9. ,Singapore National Stadium by Arup Singapore
The stadium owner benefits from having a ETFE
roof through lower operational costs, especially
energy costs. Cooling, or heating, depending on
local environment, is more efficiently achieved
because ETFE cladding can be adjusted to local
climatic conditions. At the same time as being a
physical protection from the elements, ETFE can be
engineered to provide natural light and heat in the
proportions required by the building’s users.
The use of ETFE helped reduce the overall
weight of the roof and subsequent steel
tonnage required, and consequently had a huge
impact on the overall carbon footprint and energy
consumption of the stadium.

10. Advantage
• Transmits more light, which can be regulated for local
climates by applying patterns (dots) during the manufacturing
process
• Insulates better
• Costs 24% to 70% less to install
• Is only 1/100 the weight of glass

11. Disadvantage
• ETFE transmits more sound than glass, and can be too noisy
for some places. For a roof subject to raindrops, the
workaround is to add another layer of film, thus decreasing
the deafening drumbeats of rain but increasing the
construction price.
• ETFE is usually applied in several layers that must be inflated
and require steady air pressure
• Working with ETFE is too complex for small residential
projects

12. ETFE is often called a miracle construction material
for tensile architecture because of these factors:
• ETFE is strong enough to bear 400 times its own weight
• ETFE is thin and lightweight
• ETFE can be stretched to three times its length without
loss of elasticity
• ETFE can be repaired by welding patches of tape over tears
• ETFE has a nonstick surface that resists dirt and birds
• ETFE doesn't burn, but melts and self-extinguishes
• ETFE is expected to last as long as 50 years

16. REFRENCES:
Wikipedia
Google images
Pinterest
https://www.chemours.com/Teflon_Industrial/en_US/tech_info/techinfo_compare.html
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