Reusable hand warmers produce heat on demand, and are generally contained within metal objects, or small packets which are held against the hand to help warm them up. They are also otherwise known as pocket warmers. Used correctly with proper outdoor clothing, when participating in outdoor activities in sub zero temperatures, such as mountain climbing, skiing, hiking, fishing, they help to assist the user in fighting off the cold. Warmers are not limited to the hand region alone though. There are many different types which can help with joint or muscular aches by providing heat to the affected area. They come in a range of types and prices, so deciding on your ideal one can be tricky at times.
These different models are great for anyone who spends a lot of time in a cold environment, or participates in winter sports activities. Most of the cheaper models are very affordable, and give you a cheap and easy way to keep keep your hands comfortable.
The type that are in packets normally have adhesive strips, so they can attach to different bits of your clothes, like underwear or gloves to keep the selected body parts warm. In some cases, they are not directly in contact with the skin, as this can lead to burning. If you get cold feet, there are models that can be inserted into your shoes or boots, or stuck onto your socks. However the reason you are hear is to learn about hand warmers, so we will stick to that subject.
There are a variety of different kinds out there. Some hand warmers are activated with air contact, and contain iron, water, cellulose, vermicilite, salt, and activated carbon, which will produce heat from the exothermic oxidation of iron when exposed to air. How they work is the water will act as a catalyst, and the activated carbon speeds up the reaction, while the salt also acts as a catalyst. Let’s start by talking about those models, and then looking at some of the various other different ones on offer.
Supersaturated Solution models
Supersaturated solutions models are the kind of hand warmers that generate heat through the exothermic crystallisation of supersaturated solutions. Bending or snapping a small metal disc that is inside the pad is how the heat is generated. This particular action generates nucleation centers that initiate crystallisation. To dissolve salt in its own water of crystallisation, heat is required. The moment crystallisation is initiated, this heat is released. To recharge these types of reusable hand warmers, you need to boil the pads in water, and once they are in liquid state you can use them again. These models tend to be quite common, and are fairly cheap and affordable. You can often pick up a twin or a four pack of these for under $10, which makes them great value for money.
Lighter Fuel Reusable hand Warmers
For something simple and convenient to use, look for a lighter fuel warmer. These types operate on lighter fuel, which will react with a platinum catalyst hence releasing heat by oxidation reactions. To reuse these particular types, all you need to do is refill the hand warmers. These types provide an excellent source of almost instant heat.
Battery Powered Warmers
Other types include battery powered warmers. With these particular types of hand warmers, the electrically resistive heating devices convert electrical energy in the battery to thermal energy. They can operate off rechargeable batteries and disposable batteries, although some models can be picky. Like cellphones, these can be charged and recharged hundreds of times using the same battery. This is beneficial for the user as it saves money, and is good for the environment.
Passive hand warmers
And lastly we have the passive warmers.They can also be referred to as heatbands. They are worn around your wrist, and consist of a thin band of material. The blood vessels that are close to the skins surface are insulated, and reflect the body’s own heat back to the area using the hand warmers.
Above we have discussed some of the more popular types of heat packs and warmers. Some are more affordable than others, but it all depends how often you intend to use then. Your usage patterns should give you an idea of what kind will be most suitable for your needs. If you want a good place to compare the pricing of the different models, you can head over to Amazon to see their range of models
Remember to choose wisely, and your reusable hand warmers will provide you with lovely warmth on the coldest of days.