Generally, a down product has three kinds of cashmere, namely, velvet: a kind of short stalk, and at the same time, a lot of short fluff feathers are separated, which is a bit like sorghum, usually collected from the chest of a duck or goose, real down. This is the kind; one is the velvet that is broken by the flakes, which is to break the wings of the duck or goose and the long feathers with thick stalks on the tail; there is also a kind of flying silk (sorry for the spelling of English), which is In the process of processing the two kinds of velvet, the short velvet hair is detached from the stalk.
In the processing of down products, the down level is determined by the different contents of the above three kinds of velvet. The higher the level of the first type of velvet, the more the fluffiness of the piece will be reduced, and the warmth will be poor. Feisi will feel very good, very soft, but the warmth is very poor, and will be agglomerated after drying. After two years, I heard that some small down products factory recycles flying silk from the big factory, making clothing or bed linings.
As for gray velvet and white velvet, there is no need to distinguish it now. In terms of duck down, the southern part is mostly lake duck down, almost all have black hair. Many years ago, the duck down was collected near Beijing, it was white, due to small output. It needs to be mixed with other velvet, of course it is black.
Selection of down products (only for outdoor products):
Outer layer: generally used high-strength, high-density nylon, all coated, not necessarily waterproof, is for the leakage of the fleece, in the process of the outer skin processing, the line is soaked through silicone oil, is to prevent the sewing machine from going up and down Tightening and increased friction will cause the needle eye to be enlarged, resulting in a leak. Therefore, when checking the outer skin, it is necessary to see whether the needle eye is enlarged or deformed by the thread, and whether the stitching of the stitching is uniform. If it is foreign trade, the stitch length of all the stitches is the same (except for the open line of the cuff, collar and pocket).
Inside (commonly known as Lizi): It should be two layers, the layer that is close to the body does not matter what it is, the key is that there should be a layer of non-woven fabric inside it, which is specially designed to prevent the leakage of velvet, because the best is DuPont, So it is called DuPont paper. In the past two years, there have been no non-woven fabrics, but the response seems to be not particularly good.
Choosing cashmere: first hand pinch, big stems more than a lot of hair; small stems indicate that the cashmere is high; no stem is the big prize, all flying silk, do not want. Then the hands are pressed together, and the quick recovery of the expansion indicates that the fluffiness is good, and the warmth will be better.
Look at the standard: the regular product will indicate the amount of cashmere, the velvet is generally the sum of the velvet and the flakes, the flying silk is a single standard, but the velvet and the flakes are better distinguished.
Looking at the fluffiness, most of the foreign trade goose down products have a standard fluffiness, the domestic goose down is only up to 650, the imported goose down is only 775, the top level, and the high is still not yet.
In addition, some duck down will be a bit taste, the specific can buy a roast duck duck shelf, digging the oil sac on the duck butt to smell it, you know! ! !
The above is just some of my personal experience in the work, for your reference.
Men'S Injection Shoes,Breathable Men Socks,Breathable Men Dress Shoes,Men Sneakers White
Huaian sunrise shoes Co.,Ltd , https://www.xinruishoes.com