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What are the characteristics of down
What is down
Down (DOWN) refers to geese and ducks and other waterfowl in the neck to the chest and abdomen between the soft down, other parts of the feathers are not included, which is also the English "DOWN" word origin.
Because these feathers need to be immersed in water frequently, their insulation ability is the crown of the whole body feathers, and they are quite waterproof. Because these feathers do not have hair stalks, they are very soft and have a low folding capacity, making them the ideal material for down comforters and sleeping bags.
Down is a natural product, so the quality varies greatly. High-quality down has the ability to insulate itself, and it is currently the crown of all insulation materials. However, the down of poor quality is often lower than the insulation of synthetic fibers. Therefore, high-quality down has been the production of insulation clothing of the best choice.
In addition, the price of high-quality down is also very expensive. Under the current technological limitations, all down products are more or less filled with small hair stalks. It is very difficult to find down with an 80% down content. Higher composition because of the human hand to separate the down and stalks, so it is very expensive, but also very rare, the purity of up to 90%, already belongs to the very best.
Because down is a natural product, the quality of down produced by different species of waterfowl in different regions varies greatly, and the way to measure the quality of different down is to use its fluffiness (FillPower) as a standard. The common specification is how many cubic meters of down can be filled with one ounce of down. In the market, the high quality is around 450, 550 is already quite high, and anything higher is the best. When it comes to distinguishing the quality of down, all high-quality down products are labeled with their composition and filling capacity. If not, you can still use your hand to gently caress the pressure, but also roughly feel how many hair stalks contained, in addition to the weight and volume is also another measure of the quality of the pointer.
What are the characteristics of down
1, down is characterized by a breathable.
Unlike other warm materials, down has good moisture absorption and dispersion properties. According to scientific research, adults in the night will be about 100 grams of sweat, which is the body's physiological phenomenon when people sleep, and the characteristics of the down is able to continuously absorb and discharge the sweat released by the people, so that people do not have no damp and stuffy feeling. Therefore, the down comforter is the best choice for sleeping. The softness of the duvet makes it easy to sleep without a sense of pressure, and it also normalizes blood pressure, stabilizes the central nervous system, and makes it easy to fall asleep.
2. The second characteristic of down is lightweight.
In down products, if the warmth effect with cotton, down only a few hundred grams will be enough to keep out the cold and cotton needs thousands of kilograms, the volume of visible down can be fluffy several times. What is also known is that down products can be compressed, making the volume smaller, which helps to carry or transport.
Man-made fiber materials compared to down products, down products, the warmth of man-made fibers is three times, and down products, the ability to fluff better, more durable, more uniform. At the same time down products both breathable, making the body comfortable than the comfort of man-made fibers higher and better.
3, the characteristics of down three is warm.
The warmth of the material has four major natural systems, respectively, cotton, wool, silk and down. On the degree of warmth down performance is the best. China's great physician Li Shizhen in the "Compendium of Materia Medica" has said: "choose goose belly down for clothing, being flotsam, soft and new sex cold, especially suitable to solve the baby's shock pain." Visible down products are health care functions, which is determined by the down unique light and soft warmth and moisture absorption and dispersion of good performance. Through scientific research institutions found that down has a stellar structure, each filament shows the shape of fish scales and have countless tiny pores. Down can contain a large amount of static air. What we need to know is that the coefficient of conductivity of air is the lowest, so it is not difficult to understand that down has good warmth.
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