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The types and differences of leather
Jan 26, 2018

Leather is divided into natural leather (leather), recycled leather, leather (PU / PVC). Leather is the skin of cattle, sheep, pigs, horses, deer or some other animals peeled off the body, after processing by the tanneries, made of various characteristics, strength, feel, color, pattern leather material, is a modern leather goods Required material. The dermis is generally composed of the epidermis (removed), dermis, reticular layer, subcutaneous (removed) and so on. Among them, leather, sheepskin and pigskin leather is the raw material used in the three major types of leather.

First, the leather: leather and the first layer of skin and the distinction between the second floor. The company is located in:

①: The first layer of skin refers to the grainy (dermis) of cattle, sheep, pigskin and so on, the leather has a special natural texture effect. Import leather may still be imprinted. Full grain dough from the pore size and density to distinguish what kind of animal leather. There are many types of cowhide, such as yellow cowhide (beef skins, grazing cow skins, cow skins, bull skins, uncastrated bull skins and castrated bull skins), buffalo skins, cow skins, yak skins and cow skins, The cortex is the best of our country Shandong, Henan provinces and central China and other places, but my skin resources are scarce (the United States, Brazil and other beef exporters most abundant source). Yellow leather buffalo skin pores than the thick and dense, fine grain fine formation. Water buffalo skin thicker and more sparse, is a single, grain bumpiness strong, buffalo leather is Sichuan, Jiangxi and other parts of the better, but the relative lack of resources (India and Egypt and other regions more); sheepskin main Including sheepskin, goatskin, mixed sheep. Sheepskin pores are more detailed and more dense lines, especially copper coins. Goats and more for footwear, sheep and more for clothing. Sheep to Sichuan, Hubei and other places the best (Australia's most abundant resources, and Zhang big skin thick). Pig hair because of the rule of hair is a small handful of 3 "was" shaped distribution, it is very easy to distinguish, the general use of pig-fed pigs, as well as wild pigskin. In addition, fresh water fish (grass carp, carp and other scales fish) are also found in places such as ostriches, crocodiles, short nose crocodiles, lizards, snakes, bullfrogs and marine fish (sharks, cod, anchovies, eel and pearl fish) Raw materials to do the skin. Also used as a high-end clothing with fur skin, professionally known as the fur or fur such as: fox skin (silver fox, blue fox skin, etc.), wolf skin, dog skin, rabbit skin and expensive mink and other rare Animal skin and so on.

②: There is no dermis layer of the second layer of skin, fibrous tissue (mesh layer), the chemical material sprayed or covered with PVC, PU film processing is made, therefore, the distinction between the first layer of skin and the second layer of skin is an effective way to observe the skin The longitudinal section fiber density. The first layer of skin by the dense and thin dermal layer and closely linked together with the slightly loose mesh layer composed of a combination of good strength, elasticity and process plasticity and so on. The second layer of skin is only loose fibrous tissue layer (mesh layer), and only after spraying chemical raw materials or grinding surface can be used to make leather products, it maintains a certain degree of natural flexibility and process plasticity characteristics, but less strength, Its approach requires the same level of skin. The difference is that it has a fluff effect, can produce a series of effects different from the first layer. The general use of more cashmere and pigmeat, and another for a special process wipe velvet. There are also for the production of today's popular leather, leather processing technology is somewhat different, but the same distinction.

Second, reclaimed skin: foreign branded paper. Will be a variety of animal skin and leather scraps crushed, the deployment of chemical raw materials processing made. Its surface processing technology with the leather skin, embossed leather, which is characterized by leather neat edge, high utilization, cheap; but the skin is generally thicker, less strength, only suitable for the production of cheap briefcase, drawbars bag , Clubs and other stereotypes stereotypes products and parity belt, the longitudinal section of the fiber organization uniform, can identify the liquid material mixed fiber solidification effect.

Third, leather: also known as imitation leather or plastic materials, is PVC and PU and other man-made materials in general. It is based on the textile fabric or non-woven fabrics, PVC and PU by a variety of different formulations such as foam or film processing made of, according to different strength, wear resistance, cold and color, luster, pattern Patterns and other processing requirements, with a wide variety of colors, waterproof performance, neat edges, high utilization and relatively cheap leather features, but the vast majority of man-made leather, the feel and flexibility of the leather can not achieve the effect of its longitudinal Cut surface, you can see the subtle bubble holes, cloth or surface film and dry man-made fibers. It is a type of material that has been extremely popular in the early days and is widely used to make various kinds of leather products, or part of the leather materials. Its increasingly advanced production technology, is being widely used in the production of two-story skin. Nowadays, the leather-like leathers are produced on a production scale and their surface process is extremely base-like and their fiber structure almost reaches the dermis, which is also quite competitive. But leather and imitation leather (recycled leather and artificial leather) are incomparable: unique hygiene (natural pores and fibers) and durability.

From the grades of leather points: full grain leather> half grain dough> light dough> rebuilt dough

Hard and soft points from the leather: chrome tanned leather> semi-tanned leather> whole plant tanned leather (roasted skin)

From the leather style practices to points: oil wax leather, water dyed leather, smash leather, napa leather, waxed leather, embossed leather, skin repair, paint light skin, matte skin, film skin, printing leather, leather crack , Suede and so on. Very volatile, because you are exposed to benzene, phenol, alkane, alkenes, chemicals that are very harmful to humans. If the factory does not have good protective measures, aplastic anemia and cancer are highly likely.

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