Advantages and disadvantages of down jacket

1. Down jacket is light in weight. The first layer is made of nylon yarn as fabric and down as filler. The total weight is between 500 and 1000g, which is 1/6 to 1/2 of the weight of other warm clothes.

2, the texture is soft, because the down is soft, so it is used as clothing wadding and comfortable to wear.

3, good warmth retention, down is not prone to fiberboard knots, and the fabrics are mostly high-density coatings, which can keep more air in the clothes and have good warmth retention.

Disadvantages of down jacket:

1. Overweight down jackets will increase the flowing air layer between clothes and human body, and the body temperature will be lost quickly. Too thin down jacket will narrow the gap and contain less static air, thus reducing warmth.

Most down jackets are made of chemical fibers such as nylon. Because nylon fabric is extremely poor in heat resistance, it will be deformed when the temperature reaches 160℃. Therefore, when wearing down jackets, you should avoid hot chimneys, hot ashes of cigarettes and scattered objects of fireworks.

3. Although the down jacket can be completely washed, due to the poor strength of the down jacket, frequent washing will cause the down jacket to be crumpled and caked, which will reduce the warmth retention.

4. Nylon fabric is afraid of sun exposure, and long-term sun exposure will make nylon fabric fibers age.

5. Some people will have hard papules or lumps all over their bodies after wearing down jackets or duvets, which is called urticaria; Can also be manifested as nasopharyngeal itching, runny nose, sneezing, coughing, chest tightness and so on. May cause the above-mentioned phenomenon similar to allergic reaction.

Extended data

I. Key indicators

⑴. Filling quantity: Filling quantity is not an index to measure down quality, but refers to the weight of all down filled in a down jacket. Generally, the filling amount of outdoor down jackets is about 250-450g according to different goals.

⑵ Down content: Down content is the proportion of down, generally expressed as a percentage. The cashmere content of outdoor down jackets is generally above 80%. On this data surface, cashmere content is 80%, and feathers account for 20%.

⑶ Filling power: Fluffy is an important index to measure the warmth of down. If the space occupied by an ounce of down is 600 cubic inches, the fluffy degree of the down is said to be 600.

The higher the fluffy degree of down, it shows that under the same down filling amount, down can fix a larger air layer for thermal insulation, so the better the warmth retention of down. Fluffy is not a hard index in China, and the relative error of measurement is also large.

Second, the principle of keeping warm

Down has a three-dimensional structure, and good quality down jackets are generally fluffy, so the down with the same weight can fix the air better than other materials, and a large number of down filaments are intertwined to fix the air, forming a heat insulation protective layer, thus achieving good thermal insulation performance.

The down jacket stipulates that the nominal down content of the filled down should not be less than 50%, and the higher the down content, the stronger the warmth retention. We can judge the quality of down winter clothes by observing the fluffy degree of down winter clothes in daily purchase.

Birds' down is very plump. In the cold winter, they can spend the winter naked, that is, they use feathers to keep the air still and keep their temperature isolated from the outside world.

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