Down is a kind of flower-like hair that grows on the belly of geese and ducks, and the scales are called feathers. Because down is a kind of animal protein fiber, it is more insulating than cotton (plant cellulose), and as the temperature changes, feather-shaped fibers densely cover thousands of triangular pores and may shrink And swelling. Temperature adjustment function. It absorbs the hot air generated by the human body and isolates the cold air from the outside world. Down can be divided into duck down and goose down, but duck down is very common in the market.
Down cotton: Cotton with different specifications of ultra-fine fibers manufactured by a special process is called down cotton because it fills the gap in the market for down substitutes with the same quality as down. It is light and thin, has a delicate touch, is soft, has excellent heat retention, is not easy to deform, does not penetrate silk, has a soft feel, and has the same weight or higher warmth retention performance. It is widely used in down jackets, ski shirts and winter clothing. Warm products. There are two types of down cotton. One is shaped like carded cotton, similar to DuPont cotton, and is also called imitation goose down cotton. The other has no shape, similar to PP cotton, and feels like down. Ideal for down. The so-called down cotton is actually hollow cotton, but not real cotton, but hollow polyester as a filler. Because the air is insulated, it is somewhat warm.
In comparing the two, the difference is obvious.
Down is natural fiber, and down cotton (hollow cotton) is chemical fiber.
The downgrade is very high, the quality is very good, but the price is of course also very high.
Down jackets have better warmth retention properties than down cotton.