What is a foil blanket used for?
50 Uses for an Emergency Blanket. An emergency blanket, sometimes referred to as a first aid blanket, space blanket, Mylar, thermal or weather blanket, is used in emergencies to reduce heat loss in a person's body caused by thermal radiation, water evaporation and convection.
As they work to keep heat out, space blankets also work to keep heat in. Because they could reflect the wearer's body heat back toward the wearer, these blankets had potential for a multitude of uses. They/ve become invaluable to marathon runners to help stay warm at the end of a race.
- woobie (plural woobies) (US, childish) Any object, typically a blanket, garment or stuffed animal that is used simply for its comforting characteristics. (US, intimate) Term of endearment.
- Metals are not good insulators. If a material is not a good insulator, the other choice is that it is a good CONDUCTOR. Conductors easily transmit energy. Since metal is a good conductor of energy, the spoon gets hot because heat is transferred through the metal pot to its handle, and then to the metal spoon.
- I assume you mean thermal insulation (cotton is also a fairly good electric insulator and so is air so the fluffy balls insulate electrically as well!) Cotton balls are very porous, allowing them to hold a lot of air. Heat transfer is slowest through a gas, so the cotton balls make good thermal insulators.
All of them said they carried a "space blanket" to keep them warm. (Blankets do not add heat unless the blanket is warmed, as in an Emergency Room. Warmth must be added, under the insulation). It is well known that body heat is lost in 5 specific ways: Convection, Conduction, Radiation, Evaporation and Respiration.
- Cold air tries to carry your body heat away. Blankets form a barrier between your body and that cold air. Since heat doesn't tranfer through the blankets very well, they keep the heat from getting out. The colder the surroundings are, the more insulation you need to keep your body heat from escaping too fast.
- Why are shiny foil blankets wrapped around marathon runners at the end of a race? The shiny metal reflects the heat radiation from the runner back in, this stops the runner getting cold.
- A: Styrofoam is a very nice thermal insulator. Multiple layers of styrofoam with some reflective sheet between them (aluminized mylar is very good) make a nice insulating wall. The aluminized mylar reflects radiant energy, and the styrofoam blocks convection without causing much conduction.
Emergency shelter -- In a pinch, you can use your space blanket as a tent, tarp or lean-to. The material is waterproof so it will protect you from rain or wet snow. Keep cool -- In the same way that the space blanket reflects heat back toward you, it can also reflect heat away from you.
- Shock in the emergency department. Systolic hypotension, oliguria, metabolic acidosis and a cold clammy skin are late signs of shock. The pathophysiology of early hypovolemic shock includes hyperventilation, vasoconstriction, cardiac stimulation, fluid shifts into the vascular system and platelet aggregation.
- Symptoms of acute stress disorder involving arousal include:
- Sleep problems.
- Difficulty concentrating.
- Exaggerated startle response, jumpiness.
- The symptoms of acute stress disorder or PTSD include:
- Mood swings.
- Poor concentration.
- Problems sleeping.
- Recurrent nightmares or flashbacks.
- Avoiding people or places that serve as reminders of the stressful event.
Updated: 2nd October 2019