1, the dermis is woven by many collagen fibers with different thicknesses, and it is divided into two layers: granular surface layer and reticular layer. The surface layer of the particles is woven by extremely fine collagen fibers, and the reticular layer is woven by coarse collagen fibers.

2. The surface layer of polyurethane is composed of polyurethane layer similar to the grain surface layer of natural leather, and the base layer is made of superfine fiber nonwoven fabric, which is very similar to the mesh layer of natural leather, so polyurethane has very similar structure and performance to natural leather.

Second, the appearance is different.

Because genuine leather is natural leather, it has obvious defects, uneven surface brightness and irregular pores. The surface of polyurethane is regular and flawless, with uniform bright lines and no pores. Press the leather with your fingers, and there are no obvious pores and wrinkles. If there are wrinkles after pressing, they will not disappear naturally.

Third, the production process is different.

1, genuine leather is natural leather, as well as cowhide, pigskin, sheepskin, horse skin and so on.

2. Spandex is a non-woven fabric with three-dimensional structure, which is made of microfiber staple fibers by carding and needling. It is the third generation of artificial leather, which is finally made by wet processing, PU resin impregnation, reduced extraction, grinding and dyeing.

Extended data

Daily care of dermis

1, after long-term contact with the outside world, moisture will be generated inside the dermis, so it should be often dried in a ventilated place to prevent the growth of bacteria, and an appropriate amount of moisture-proof beads can also be added.

2. If the genuine leather gets wet carelessly, it should be dried with a dry cloth, and then placed in a ventilated and cool place, and naturally dried in a cool place. It should not be placed in the scorching sun or put in a hair dryer to dry, so as to avoid explosion, deformation and hardening.

3. Don't put the leather in an environment with too high temperature, too low temperature and too high humidity, otherwise it will be easy to wear.

4. Leather cleaning should not be washed with water or wiped with chemical reagents, but should be wiped with cotton cloth and soft brush.