The origin of leather is to simulate the composition and structure of natural leather and the plastic products that can be used as its substitute material. It is usually made of impregnated non-woven fabric as mesh layer and microporous polyurethane layer as particle surface layer. Its front and back sides are very similar to leather and have certain air permeability, which is closer to natural leather than ordinary artificial leather. PU synthetic leather is widely used in making shoes, boots, bags and balls.

　　In 1964, DuPont made synthetic leather with the trade name of coffin. The synthetic leather is based on the non-woven fabric of synthetic fiber, reinforced by fabric in the middle, and immersed in polyurethane elastomer solution similar to that of natural leather collagen fiber. The projectile solidifies in water, and its solvent is replaced by water, thus forming tiny holes in the shell.

　　When was wet leather born?

　　These pores are connected with each other to form a tough and elastic microporous layer from the surface to the inside, forming the surface layer of synthetic leather and forming a whole with the base. Due to the capillary effect formed by interweaving non-woven fibers, which is conducive to the absorption and migration of moisture, PU synthetic leather can partly show the respiratory characteristics of natural leather.

　　In 1965, the PU synthetic leather with two-layer structure was developed by Keli company of Japan. The intermediate fabric was eliminated to improve the softness of the finished product. In modern times, there are many kinds of synthetic leather. In addition to the common characteristics of synthetic fiber non-woven fabric substrate and polyurethane microporous surface layer, the variety and processing technology of non-woven fabric fiber are different.

　　For example, styrene butadiene or latex base impregnation solution is used to obtain the special combination between non-woven fabric fiber and polymer; there are three-layer, two-layer and single-layer structure in different structural levels; suede PU synthetic leather is manufactured by surface embossing and tanning process.

　　When was wet leather born?

　　Skin refers to the state (chemical structure) in which collagen fibers of skin are still in the body of animals; leather refers to the state in which the chemical structure of collagen fibers in the skin changes after physical and chemical treatment to remove useless components from the skin. In addition, leather is soft and easy to bend in dry state, and it is not easy to rot in wet state. Leather is the raw material of leather making, and leather is made of leather.

　　If the difference between leather and leather is confused with the difference between "natural leather" and "artificial leather", it is easy to confuse the concept of layman consumers and increase their difficulty in identifying leather products.

　　Dongguan Quanhong Sports Goods Co., Ltd. produces wet PU, PU synthetic leather, leather, sweat absorption belt, badminton racket line, fishing rod sweat absorption belt, bicycle strap, golf grip belt, yoga mat and other sports goods and accessories.

　　Jiangmen Pu sand leather /