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Styrofoam

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This article is about the Styrofoam brand. For other materials sometimes referred to as "Styrofoam", see extruded polystyrene foam and expanded polystyrene. For other uses, see Styrofoam (disambiguation).
Styrofoam brand insulation extruded polystyrene foam (XPS), owned and manufactured by DuPont

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balls insulation.[1]

Additionally, balls spray paint.

History

In the 1940s, researchers, originally at Dow's Chemical Physics Lab, led by Ray McIntire, found a way to make foamed polystyrene. They rediscovered a method first used by Swedish inventor Carl Georg Munters, and obtained an exclusive license to Munters's patent in the United States.[2] Dow found ways to adapt Munters's method to make large quantities of extruded polystyrene as a closed cell foam that resists moisture. The patent on this adaptation was filed in 1947.[3]

Uses

Styrofoam has a variety of uses. Styrofoam is composed of 98% air, making it lightweight and buoyant.[4]

DuPont produces Styrofoam building materials, including varieties of building insulation sheathing and pipe insulation. The claimed R-value of Styrofoam insulation is five per inch.[5]

Styrofoam can be used under roads and other structures to prevent soil disturbances due to freezing and thawing.[6][7]

DuPont also produces Styrofoam blocks and other shapes for use by florists and in craft products.[8] DuPont insulation Styrofoam has a distinctive blue color; Styrofoam for craft applications is available in white and green.[9]

Environmental issues

The EPA and International Agency for Research on Cancer reported limited evidence that styrene is carcinogenic for humans and experimental animals, meaning that there is a positive association between exposure and cancer and that causality is credible, but that other explanations cannot be confidently excluded.[10][11]

See also the expansive list of environmental issues of Polystyrene, among those it being non-biodegradable.

See also

References

  1. ^ Cite error: The named reference gc was invoked but never defined (see the help page).
  2. ^ Boundy, Ray H.; Amos, J. Lawrence (1991). A History of the Dow Chemical Physics Lab. New York: Marcel Dekker, Inc. pp. 117–128. ISBN 0-8247-8097-3.
  3. ^ US 2450436, Otis Ray McIntire, "Manufacture of cellular thermoplastic products", published 1948-10-05, issued 1948-10-05 
  4. ^ "What is the Difference between EPS Polystyrene and (styrofoam)?".
  5. ^ "Dow Announces New Technology for STYROFOAM Insulation". Archived from the original on 2011-08-12.
  6. ^ "Geotechnical applications of Styrofoam". Dow Chemical. Retrieved 2009-10-28.
  7. ^ "Engineering considerations when building on permafrost". Retrieved 2007-08-30.
  8. ^ "STYROFOAM Brand Foam Crafts". Retrieved 2010-12-31.
  9. ^ Cite error: The named reference nocup was invoked but never defined (see the help page).
  10. ^ "(Styrene) Fact Sheet: Support Document (CAS No. 100-42-5)" (PDF). EPA. December 1994. Archived from the original (PDF) on 24 September 2015. Retrieved 8 January 2020.
  11. ^ "STYRENE (Group 2B)". INCHEM. 2002. Retrieved 8 January 2020.
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