"Leather" is for people to distinguish a synthetic leather and natural leather on the habit of name. Leather eco leather is a product made by chemical treatment of animal skin in the natural environment. It is mainly made from the skin of animals. There are many kinds of leather, variety, structure, quality, and the price is different. Therefore, the leather is not only a general designation of all natural leather, but also a vague logo on the commodity market.
In view of the physiological character, any animal skins were hair, epidermal and dermal parts. Located in the hair epidermis, close to the top of the leather, leather is located below the epidermis, between epidermis and subcutaneous tissue, is an important part of raw hide.
2, the raw material of leather
Tanning is the raw material of animal skin, although in our life is the most common pigskin, cowhide, sheepskin, but in fact most of the animal skins can be used for tanning. Only the quality of the leather, pigskin and sheepskin and high yield, is the main raw material of leather.
Although the raw material of leather leather variety, according to the International Animal Protection Ordinance issued a series of laws and regulations, really for the production of raw materials are limited to some extent, the commonly used leather are cattle leather, sheep leather, pig leather and horse leather. In the use of the specification, please see "leather logo eco leather product specification"
To distinguish between the 3, pig, cattle leather, sheep leather, Ma Ji
Different types of leather, its characteristics and uses are also different. For example, the cow leather surface fine and high strength, the most suitable for leather shoes; light, thin and soft, is the ideal material for leather clothing; pig leather breathable water vapor performance is good, is suitable for the production of underwear and children's products; horse leather fiber structure is relatively close, the intensity is relatively high, for the production of leather pants and boots good effect.
In general, the leather surface pores of the thickness, density and distribution is the main basis to distinguish between cattle leather, pig leather, horse leather and sheep leather.
Pig: a circle on the surface of the coarse pores, inclined into the leather. The pores are arranged in a group of three, and the surface of the leather is presented with a number of small triangles.
Beef: yellow cattle and buffalo leather are known as cattle leather, but there are some differences between the two. Cattle leather surface pores were round, straight into the leather, compact and uniform pores. Irregular arrangement, as if The sky was covered with stars. Water buffalo leather surface of the pores than the yellow cattle leather detail.
Ma Ji: the surface of the pores of the oval shaped, slightly larger than the yellow cattle leather pores, arranged more regular.
Sheep leather grain leather: the surface pores of oblate, pores clear, several members of a group, arranged in color like mud
The method is: a look at the pores, three to see the brightness, three by hand. Its specific features are:
(1) leather. Cowhide leather surface pores small, round, uniform and tight, skin bright and smooth, plump texture, delicate, soft and smooth appearance, touch the solid texture and elasticity. The selection, such as squeeze leather, fine wrinkle. For leather products, leather processing production, such as do not look carefully, almost invisible bristles eyes. At the same time, because of the thick leather wear is very crisp.
(2) sheep's clothing. Sheepskin leather surface pores pores clear, oblate, several members of a group, scaly arrangement. By making sheepskin leather products, leather and delicate, soft, although the surface luster, but not as bright as the cattle products, squeeze leather, have obvious wrinkle. The clothing of the clothing is comfortable.
(3) pigskin. Pigskin leather surface pores round and thick, three tied into a group, the triangular arrangement, each separated by distance, uneven surface of leather. Even after polishing, it can be identified. The leather surface is rough leather, feel hard.
(4) horsehide. Rough look at horse skin and some similar, the appearance of smooth and delicate. But careful observation, the brightness as cowhide and horsehide, color is dim, the pores were oval, loose and soft leather. Compared with sheepskin, horse and sheepskin is close to. The thickness of leather, sheepskin and similar size brown eyes. The key distinction is that the horse cortex than the sheepskin hard, feel bad, uneven gloss leather. Squeeze the leather, no pleats produced. Horse wear long easy to break. Leather and other natural leather is thick, in the process of leather in order to improve the utilization rate of leather, usually cut into two or more layers. The first layer of leather by profile coating used in the manufacture of high-grade leather leather, second layer and lower profile leather (referred to as the two layer of skin) without surface texture layer, beautiful and practical than the first layer of leather, a detailed look at the characteristics and differences of "eco leather leather". In the past by sanding, two layer leather dyeing "suede", which is what we call the two layer suede leather, it belongs to low grade products. Later polyurethane (PU) artificial leather production principle is applied to the production of leather production, according to the production method of PU transfer to the two layer of skin surface and a layer of PU, so that the leather has the moisture absorption, dimensional stability, and has PU artificial leather waterproof and wear resistance. The leather used in this way is called the moving film leather. Leather is thick and has good mechanical strength and dimensional stability, so the use of leather production is the most cattle two layer skin. It is obvious that the moving film leather is the product of the combination of PU leather and leather. The grade of the moving film is superior to synthetic leather and artificial leather, and the price is lower than the leather leather made from the first layer of leather, it is suitable for making shoes, belts, handbags, bags, etc..
4, the health performance of leather