Many people do not know that moisture -proof pads are also important items for outdoor travel. The importance of moisture -proof pads is no less important than sleeping bags. It is an insulator of the ground and the human body.It is important to prevent the influence of cold and humid gases on the body, prevent cold, and play a role in insulation and moisture.
The function and principle of moisture -proof pads
Moisture -proof pad function:
First: anti -硌.
Because it is difficult to find a flat place when camping in the wild, I feel uncomfortable when I sleep. If you use moisture -proof pads, the situation will be much better.
Second: keep warm.
Because the body generally contacts the ground directly with the ground when camping in the wild (the thermal insulation effect of the bottom of the tent is minimal), if there is a layer of moisture -proof pad between the body and the ground, the warmth effect will be much better.
Third: moisture -proof.
When camping in the wild, the ground is usually very tide at night. Because the moisture -proof pad is waterproof, it can play a role of moisture.
Principles of moisture -proof pads:
Like the working principle of filling bags and clothing in clothing, moisture -proof pads are also the heat exchange between the cold air between the body and the outside world (ground).She has a layer of non -circulating dead air between her body and the ground, and gradually increases the temperature of this layer of dead air with the heat of the body, making it a barrier to the heat between the body and the ground.Effect.The efficiency of moisture -proof pads depends on how much the dead air she can save and the ability to prevent air convection.
Material classification of moisture -proof pads
1. Foam plastic moisture -proof pads
The most common variety is made of high -pressure polymerization materials. After foaming, it is cut into a certain thickness sheet according to different specifications.It is characterized by closing and no water absorption. It is usually cut into 0.8-1.0 thickness with 45 times bubbles. The price is relatively low and the weight is extremely light (neglectable).This disadvantage is poor durability. For the first time, it has a odor (mainly toxic gases released by polymer materials). It is not good for health and long time. Although the taste is gone, the toxic substances are still being released slowly.
From its name, we can know the materials it choose. EVA is also called back force glue. Compared with the closed pads of closed foam foam, it has good elasticity and strong toughness. Therefore, the price is also large.It has nearly double the cost, but it has been greatly improved in terms of comfort and durability.But from its appearance, it is difficult for consumers to distinguish between the difference between the two. The real EVA material moisture -proof pads are rare in the domestic market.
Also known as a half -hole bubble film pad, use ultra -high pressure polymerization.Although this material is not as high as pure EVA materials, the strength, toughness, and tensile resistance are much better than the closed foam material. The manufacturer can make skin care through high temperature and rigidity. This approach can enhance beauty and water refusal.It also improves the toughness, and it feels better. It has no toxic chemical components. The price is slightly higher than the closed -hole foam material. The comfort used has obvious superiority. It can be said that it is an ideal variety in low -end moisture -proof pads.
4. Inflatable moisture -proof pads
This kind of moisture -proof pad called a gas bed was first used in water floating pads in China. Later, some people used as camping moisture -proof pads. This kind of gas bed made of cotton scraped fabrics is moisture -proof.Not bad, but because the size is large and the quality is heavier (it may reach more than 7 kg), and the inflation and exhaust are more troublesome, it is an unusual variety in the outdoor moisture -proof pad family.
Key point for selection of moisture -proof pads
1. Climate factor
If the weather conditions are very stable, there will be no low temperature, and the requirements for comfort should be more important than the essence. If you cannot master the factors of the weather change, choosing a high moisture -proof pad with high exception is a more insurance choice.
2. Comfort during rest
Some people only have a cushion when they sleep. They dont care much about the comfort of the moisture -proof pads. Naturally, they will choose a cheaper and lighter moisture -proof pad.Spend some budget to buy more expensive moisture -proof pads.
3. Weight
The more comfortable moisture -proof pads are usually thick and the weight is relatively heavy. If you want to engage in long -distance passing or hiking, the weight of moisture -proof pads is bound to be an important factor that needs to be considered.
4, volume
The volume of the moisture -proof pad is best not to be too large, especially the backpacking space is not much.
5. Use environment
(1) If you are engaged in outdoor activities in the harsh environment, the moisture -proof pad is important. If a good sleeping bag does not have a moisture -proof pad, the degree of warmth will be greatly reduced.Therefore, the high -density moisture -proof pads or high -quality self -charging air cushions are often selected in mountaineering activities.
(2) In ordinary outdoor activities, if the ground floor is a grassland or a beach, all kinds of moisture -proof pads and places can be dealt with; if it is an uneven mountain, it is best to choose a thicker moisture -proof pad.If the load is not a problem, you can put the ground in the tent, and then use the moisture -proof pad, the effect is excellent.The bottom of the tent is easy to enter the mud water, and the seat seat can have a good sanitary cleaning effect due to the large area.

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