In the old days when part of the scout movement, read the scout group jump windy/82, farroupilha, rs, didn’t know much about the thermal insulators, didn’t knowfor which used, used hammocks and sometimes natural shelters. when camped for the first time with tent, stretched out my sleeping bag on top of the floor of the tent, i can say with all the letters, was the longest night and stressful to all that had passed. you’re probably wondering why. answer: cold in all parts of the body, there was nothing beyond my sleeping bag and the clothes of my body to get warm.soil moisture over the floor of the tent and went into my sleeping bag turning a beautiful night of camp in a torment. the first thing i thought was that the sleeping bag he had purchased was not good enough, the temperature was to-8°, and that day it was summer, how could i sleep so badly. i decided to then search to find out why it occurred to me. after a while, through research on heat-insulating understood the reason i spent so badly that night.
What is the real use of a thermal insulator?
Stop the exchange of heat between the user and the soil, because the soil temperature is much lower compared to that of the human body.
How to use?
The correct mode for the use of thermal insulation is between the floor of the tentand sleeping bag, this insulates the body temperature and keeps your body dry, in order to have a night without discomfort.
Today there are a versatile models on the market, of the cheapest to the high priced well. It is important to know what is the difference between the cheapest and the most expensive.
It should be noted that they all have the same function, provide greater comfort to the user. The cheaper models are that rolls of E.V., usually very light, have weights between 300 and 500 g, depending on the thickness. Already the top price, are collapsible, which are generally thicker and have impact damping slices, further increasing comfort. There are still, the inflatable thermal insulators, which have reduced sizes and are usually very light and comfortable, but also have higher values.
Important to mention that inflatable mattresses in camping, do not come within the category of thermal insulation.
Many say that the mere fact of having an air mattress already makes an insulator, that is not always true. As well as the cold wind makes you spend hard time withouta good coat, the air inside the mattress will cool rapidly on contact with the cold ground and overnight will freeze your body.
An inflatable mattress is heavy (empty it weighs around 4 kg) and bulky, in addition to demand large amounts of air to be armed, making it infeasible to be portedon walks of medium and long duration.
We will present some models, which can be found on the market:
Thermal insulator E.V. the
The most common option is the insulation of E.V. (Satin Vinyl Foam). Different fromcommon mattress Expanded polyurethane foam which has open cells and allows the passage of air, the E.V. has closed cells, which helps to improve the comfort even with very thin thicknesses, but mainly increases the thermal insulation.
Thermal insulator EVA – source: Internet
The insulation of aluminized film owns E.V., as pictured above, which reflect your body heat back to you. They also have various thicknesses of 6, 8 and 10 mm, each measure has a specific application, see the following:
Thermal insulation thickness 6 and 8 mm, used for temperatures up to 0°;
Thermal insulation with a thickness of 10 mm, used for temperatures below 0° degrees.
To your weight/volume ratio is great, weighing between 300 and 500 g, approximately.
Its biggest drawback is the transport, can only be rolled up, it is not advisable to fold it, because by doing so, reduce your life span. For this reason, your transport must be done on the outside of the backpack that gets in the way while walking, especially in dense forest or hard-to-reach places, because you can get in touch withtwigs, thorns causing tears.
Approximate value: 50.00 R$
Has an interesting feature, remember a egg tray, provides a good night’s sleep, behold, greatly increases the power of isolation. It is made of various types of foam, but the most common is that of polyethylene. It’s more comfortable and has lower weight, about 200 g unless, in respect of the E.V., weighing about 300 g.
His only trouble is the same as the insulation E.V., the transport must be done on the outside of the backpack and even folded, the size is equal to the insulation ofE.V.A.
Approximate value: 160.00 R$
Collapsible insulator – source: Internet
Inflatable thermal insulator