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Tell You Something About Leather Stuff.

2008/12/3 10:58:00 41920

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1. packaging technology for leather materials:

The packaging technology of leather materials: many people have used leather for many years, but they may not know how to pack the leather. They usually think that the front of the leather should be rolled inside, so that the leather can be protected.

1) Full (grain) series. The cattle and baga series must be in front of the face and face in the back, so as to keep the dermis loose, otherwise it will cause loose surface.

Although it is easy to pollute the skin surface, it is necessary to do so.

2) throw flower skin, embossed leather, paint skin: these skins basically do not exist the phenomenon of loose surface, so you can let the face roll inside the skin.

Identification of 2. layers of skin and two layers of skin

Three levels and four layers...

It is slightly different from the two level, which is temporarily divided into two levels.

1. touch

Pull the touch skin surface, soft for the first layer, hard for two layers.

The skin of the first layer is smooth, soft, plump and elastic, and the two layers of skin are dull, rigid and soft.

After pressing, there are natural wrinkles on the skin of the head and will disappear naturally.

2. eyes

At the level of impressions, we should observe the surface of the dermis when pulling the dermis vigorously. If there are obvious uneven levels, similar to orange peel, no pores are two layers.

The other layer has clear pores and patterns, and the yellow cattle skin has a uniform fine pore. The yak skin has coarse and sparse pores, and the goat skin has fish scaly pores.

3. longitudinal section

Due to the improvement of technology, many two layers of skin are orange peel and soft.

At this time, the fiber density of skin longitudinal section should be observed. There are three layers of skin on the first layer, namely, coating, papillary layer and reticular layer.

The nipple layer is thin and dense fibrous layer. The reticular layer is a thin fibrous layer, and the nipple layer changes to the reticular layer.

The two layer of skin is coated and reticulated (sparse fibrous layer).

3. commonly used leather and its properties

A. dermal series

1. benzene stained skin as described in previous 2.1.5.3

2. embossed leather: generally used shaving leather to suppress all kinds of patterns or fabrics, such as crocodile pattern, lizard pattern, ostrich skin pattern, python skin pattern, water ripple, beautiful bark pattern, litchi pattern, imitation deer stripes, and various stripes, flower patterns, three-dimensional patterns, or creative designs that reflect various brand images.

3. abrasive skin: the leather surface is polished, and the grain scar or rough fiber is worn out to reveal the smooth and smooth leather fabric, and then dyed into various popular colors.

4. repair surface: it is a poor top layer of leather, polishing the surface, grinding the surface of the scar and blood tendon marks, using a variety of popular coloring slurry spray, pressed into grain or smooth effect of the skin.

5. printing or floral skin: the material is the same as the embossed leather, but the process is different from printing or ironing the top or two layers of leather with various patterns or patterns.

6. laser skin: also called laser skin, laser technology is used to etch various leather patterns on leather surface.

7. lacquer: leather made of two layers of leather coated with various chemical raw materials, pressed or matted.

8., two Action (two LEA) skin is made of PU film.

B: regenerated leather:

In the traditional leather making process, a large number of solid wastes are produced, such as the leather blocks produced by wet wet pruning, the scraps and other wastes produced during the cutting process, and all kinds of scraps and scraps are produced in the leather processing.

The regenerated leather is then crushed into leather fibers with various animal waste materials, mixed with adhesives and other auxiliaries, and pressed to form.

The surface has two processes: finishing and PU film, and the surface effect is the same as that of leather.

Generally speaking, the longer the leather fiber in regenerated leather is, the more stable the performance is. The greater the proportion of long fiber in the raw material, the better the physical properties of the product.

If the raw material contains too much broken dandruff, the strength and overall performance of the product will be affected.

The regenerated leather is characterized by its neat edge, high utilization rate and low price, but the skin is generally thicker, fastness, water resistance, durability and hygiene performance are not as good as natural leather.

It is only suitable for making parity box, pull rod bag, universal bag, club sleeve and chair surface, etc.

Most of the low-grade leather belts sold by the big firms belong to regenerated leather.

The fabric of regenerated leather is uniform in structure and can identify the coagulation effect of liquid mixture.

C: synthetic leather (artificial leather):

It's also called imitation leather.

It is a general term for man-made materials such as PVC and PU. It is made of foam or laminating films of different formulations such as PVC and PU on the basis of textile fabric or non-woven fabric. It can be made according to different strength, wearability, cold resistance, color, gloss, pattern and pattern. It has many features, such as a wide variety of colors, good waterproof performance, neat edges, high utilization rate and relatively low price, but the majority of artificial leather can not reach the real leather effect with its handle and elasticity.

Its longitudinal section can see fine bubble holes, cloth or surface film and dry artificial fibers.

It is a very popular material from the early stage until now. It is widely used in the manufacture of various leather products. Its increasingly advanced manufacturing process is being processed by two layers of leather.

Nowadays, leather like leather has been produced in the market, and its surface technology and fiber structure of its base material almost achieve the effect of genuine leather, and its price is comparable to that of domestic made leather.

4. what is the fullness and elasticity of dermis?

The plumpness of leather is an important index of leather. Fullness refers to the feeling of sponge when hand touching leather, or the feeling of leather.

This is in the process of processing, the dispersion of leather fibers is moderate, not suffered too much loss, fiber maintains certain space form and good elasticity.

When it is not full, it means that the leather is flat and hard, shaking when it is shaking.

The elasticity of leather refers to the ability to return to its original form when the external force is removed.

For example, the leather used for clothing is kneaded into a ball, held in the hands for a certain period of time to release, and the leather is put flat. If it can be restored to its original level, it will have good elasticity while vice versa.

Leather is a very intuitive indicator of leather appearance and quality when it is plump and elastic, and its good fullness and elasticity are particularly important for leather clothing, footwear, sofas and other products.

Editor: vivi