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A space blanket

A space blanket (a.k.a. mylar blanket or emergency blanket) is a blanket used to reduce heat losses due to thermal radiation and convection. Usually it is used to reduce heat loss from a person's body, but may also be used to insulate containers, for DIY solar projects, and many other applications. First developed by NASA in 1964 for the US space program1, the material consists of a thin sheet of plastic (often PET film) that is coated with a metallic reflecting agent, usually gold or silver in color, which reflects up to 97% of radiated heat. 2 3

In the US, space blankets are made by vacuum depositing a very precise amount of pure aluminum vapor onto a very thin, durable film substrate. Space blankets are included in many emergency, first aid, and survival kits because they are usually waterproof and windproof. That, along with their light weight and ability to pack into a small space, has made them popular among outdoor enthusiasts and emergency workers. Space blankets are often given to marathoners at the end of races. The material may be used in conjunction with conductive insulation material and may be formed into a bag for use as a bivouac sack (survival bag).

See also

References

  1. ^ Reflecting on Space Benefits: A Shining Example
  2. ^ Reflective Insulation Test data
  3. ^ Emergency space blankets must be used correctly
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