the difference between "feather" and "fluff"

feathers can be slightly divided into "feather" and "velvet".

"feather" in the feather, there is a central axis called "feather axis", and there are two rows of hard "feather branches" on both sides of the "feather axis" called feathers. The main function of "feather" is to stir up air in the flight of birds, help fly and support the body of birds with high air.

"velvet" is a feather in the feather, and there is no "feather axis". It is composed of many slender and soft fiber filaments irregularly gathered at a central point and connected to the body of birds. When the fiber of each center point spreads out in the air, it looks like a flower, so it is called "velvet". The main function of "velvet" is to maintain the body temperature of birds.

birds or poultry have "feathers", only waterfowl and some birds that live in the water for part of their lives have "cashmere", such as ducks and geese. "Velvet" mostly grows on the chest, abdomen, neck and armpit of waterfowl. Mainly to maintain the body temperature of waterfowl while swimming.

"velvet" is the only natural and light heat preservation substance. The "velvet" itself cannot produce heat energy. Its heat preservation function is mainly due to the fact that each velvet has a lot of soft velvet. When the velvet spreads, it forms a three-dimensional velvet ball, which wraps the good temperature insulator air in the velvet ball. Thus, it becomes a top warm bag, which can not only prevent the leakage of body temperature, but also resist the invasion of cold air outside.

birds have long known how to use "feathers" and "cashmere" to build nests together. When human cheeks steal bird eggs, they accidentally find that the mixture of "feathers" and "cashmere" is very soft, comfortable and warm, so they begin to collect "cashmere" for warm clothing and bedding.

At present, most of the "velvet" used by human beings are collected from water poultry, such as ducks and geese. In terms of volume, the "velvet" of goose is larger and the price is higher. The main reason is that the cost of raising geese is higher.

in terms of warmth, duck down and goose down are basically the same. Because "velvet" itself cannot produce heat energy. The degree of warmth of clothing mainly depends on the following factors:

1. The fluffiness of the "velvet" itself directly affects the amount of still air that can be wrapped in a good heat preservation object.

2. The quantity of "velvet" contained in the finished product.

3. Clothing design, including the cloth, style and clothing structure used.

due to the need to protect the interests of consumers and set the degree of warmth of finished products; Different regions and countries have different specifications. It is also required that each finished product needs to clearly list the lint content and lint composition of the finished product on the label.

Under normal circumstances, the generally commercial adopted specifications are 80/20 goose down for each ounce should occupy 500 cubic inches of space under fluffy conditions. The higher the fluffiness, the better the degree of warmth. These high-quality products are embroidered with the words 600 or 700 respectively.