When it comes to marathons, what do you think are the necessary items for running a marathon? Water, electrolyte drinks, energy supplements, large towels, clean clothes... Except for these more conventional necessities, Xiaolan decided to introduce a super powerful new friend-the emergency blanket.
It is small in size and very portable. After being folded, it is only the size of a palm, and when unfolded, it becomes a silver film that can wrap your entire body.
Both sides of the rescue blanket are plated with silver and gold aluminum foil respectively, and the weight is very light, about ten grams.
It looks inconspicuous, but its function is extremely powerful. In a low temperature environment, wearing it can keep 80% of its heat from dissipating.
So, what is the principle of emergency blankets to keep warm?
1. Add insulation to keep warm.
The thermal insulation layer is generally some fluffy materials, and utilizes the air mixed after fluffing to form a layer of non-flowing air layer on the surface of the object. The air itself is a poor conductor of heat, so it can play a certain role in keeping warm. Generally, down and cotton are used to keep warm in this way. The aluminum film in the aluminum-plastic film of the emergency blanket uses this principle to ensure that a layer of air on the surface of the human body is stable and does not flow.
2. Heat reflective to keep warm.
Heat radiation is reflected back using highly reflective materials. We all know that white clothes are cooler than black clothes because white reflectance is stronger than black and can reflect sunlight back. The aluminum contained in the emergency blanket is a highly reflective material, which can reflect back the heat radiation emitted by the human body, and its heat reflection efficiency is as high as 90%. This effectively reduces the rate at which the body dissipates heat.
Speaking of this, you may think that emergency blankets are an essential tool for keeping warm when climbing snow-capped mountains. In fact, in general outdoor activities, one should also be prepared by hand.
For example, when going out in winter, when the temperature is extremely low and the temperature of the sleeping bag is not enough, the first aid blanket comes in handy. Spread a first aid blanket in your tent to keep warm. In addition, wrapping the sleeping bag with a first aid blanket can also keep you warm for a comfortable night's sleep.
In summer, emergency blankets are also useful. Putting it on the head, face and body can play a role in sun protection. If you accidentally fall into the water, or encounter heavy rain, when your whole body is soaked, wrap your body with a first aid blanket. Even if it is completely soaked in water, just open it and shake off the water droplets when you use it, and it will not affect the warmth retention effect at all.
When it rains, it can also be used urgently to build a temporary tent, or a temporary rain cape.
Once there is no equipment in the outdoors and you need to spend the night in the mountains, the emergency blanket is your sleeping bag. It can be directly covered or placed on the ground as a moisture-proof pad when sleeping.
The material of the rescue blanket is very strong, so it can also be used as a simple stretcher for outdoor emergency.
If you encounter danger outdoors, the strong reflection will make it easier for rescuers to spot it. It is simply the light of survival in the wild!
If you lose your equipment due to an accident and are desperate, this thin life-saving blanket in your pocket can support your confidence and protect you until rescue comes.
Small objects with great functions, the emergency blanket is a must-have artifact for home travel. It’s in our first aid kit~ Prepare one at hand, add extra protection for our life safety, and enjoy the wonderful outdoor time.