What material is fur and what is leather

Any object is made up of atoms, which are made up of a positively charged nucleus and negatively charged electrons, which move around the nucleus. Under normal circumstances, the number of positive charges in the nucleus band is equal to the number of negative charges in the electron band outside the nucleus, and the atom is not electrically charged, so the whole object is neutral. It is difficult to change the number of positive charges in the nucleus, but the electrons outside the nucleus can get rid of the nucleus and transfer to another object, so that the number of negative charges in the electron belt outside the nucleus changes.

When an object loses electrons, it shows being positively charged when the total number of negative charges in its electron band is less than the positive charge of the nucleus; On the contrary, an object that would otherwise be neutral, when it gets electrons, it shows being negatively charged.

When two objects rub against each other, because the nuclei of different objects have different abilities to bind electrons outside the nucleus, one of them must lose some electrons and the other gain excess electrons. If a glass rod is rubbed against silk, some of the electrons of the glass rod are transferred to the silk, and the glass rod is positively charged due to the loss of electrons, and the silk is negatively charged due to the electrons it gets. Rub the rubber rod against the fur, some of the electrons of the fur are transferred to the rubber rod, the fur belt is positively charged, and the rubber rod carries the same amount of negative electricity.

The cause of frictional electricity of the same material.

By rubbing against each other with some of the same materials that are easy to generate electricity, the two friction surfaces can be electrified. Further experiments show that the charges on the two surfaces are homogeneous, and some materials can have a positive charge after friction, and some can have a negative charge after friction.

After excluding external influences (e.g., conduction of charges by other conductors), the same results can still be obtained.

Atoms are made up of two types of electrons with negative charges and a nucleus with a positive charge, the positive charge carried by the nucleus is equal in number to the negative charge derived from it, so the atom is electrically neutral, and the object made of the atom is also electrically neutral. Different substances have different abilities for binding electrons to their nuclei. When two objects rub against each other, the nucleus of which object has a weak ability to bind electrons, some of its electrons will be transferred to another object, the object that loses electrons is positively charged due to the lack of electrons, and the object that gets electrons is negatively charged because it has excess electrons.

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Leather is the material of animal skin. 1. Leather is a denatured and non-perishable animal skin made by physical and chemical processing such as hair removal and tanning. Leather is made of natural protein fibers tightly woven in three-dimensional space, and its surface has a special grain layer, which has a natural grain and luster, and the feel is also very comfortable.

2. According to the use, leather can be divided into leather, national defense leather, industrial and agricultural leather, cultural and sporting goods leather; According to the tanning method, leather can be divided into chrome tanned leather, vegetable tanned leather, oil tanned leather, aldehyde tanned leather and combined tanned leather. 3. According to the types of animals, leather can be divided into pig leather, cow leather, sheep leather, horse leather, donkey leather, kangaroo leather, etc., as well as a small amount of fish leather, reptile leather, amphibian leather, ostrich leather, etc. 4. According to the layer, the leather is divided into the first layer of leather and the second layer of leather; According to manufacturing*, leather is divided into *, recycled leather, artificial leather, synthetic leather, etc.

Leather is a type of animal skin, which is processed animal fur that has been tanned, nitrated, or otherwise treated to resist spoilage, and is soft and supple in dry weather.

Leather has properties such as flexibility and breathability, and is widely used in machine wheel belts, leather shoes, suitcases, and late leather boxes.

The leather industry covers the main industries of tanning, shoemaking, leather clothing, leather goods, fur and its products, as well as supporting industries such as leather chemicals, leather hardware, leather machinery, and accessories.

Leather: 1Leather, or leather, refers to the animal that has been tanned and processed**, and is a clothing and craft material.

Leather is a buried animal skin, which has been tanned, nitrated or otherwise treated to resist spoilage, and is relatively soft and supple in dry weather.

2.Leather has properties such as flexibility and breathability, and is widely used in machine wheel straps, leather shoes, suitcases, leather cases, etc. Commonly used natural coarse fur leather includes sheepskin, dog skin, wolf skin, leopard skin, etc. The hair is long and large, and can be used to make hats, coats, vests, liners, etc.

3.Leather is a denatured and non-perishable animal skin obtained through physical and chemical processing such as hair removal and tanning. PVC leather refers to a method of wall decoration that is packaged with flexible materials on the surface of interior walls.

The materials used in it are soft in texture and soft in color, which can soften the overall atmosphere of the space, and its deep three-dimensional sense can also enhance the grade of the home. In addition to the function of beautifying the space, it is more important that it has the functions of sound absorption, sound insulation, moisture resistance, and collision resistance.

How to distinguish real leather from artificial leather:

1.Feel. If the surface of the leather is smooth, soft, plump and elastic, and slightly warm, it is genuine leather;

2.Look. Eyes are mainly used to identify the type of leather and the quality of the leather grain.

The surface of genuine leather has more obvious pores and patterns, while synthetic leather is not clear, although it also mimics pores. In addition, there is a layer of textile on the reverse side of synthetic leather as the bottom plate, which is used to increase its tensile strength, while the reverse side of the leather does not have this layer of textiles, which is a relatively simple and practical way to identify.

3.Smell. All genuine leather generally has a special smell of leather, but it is not a pungent odor. Synthetic leather usually has no odor.

4.ignition (which is difficult for the average consumer to do).

The smell of the dermis after ignition is similar to the smell of hair after ignition, and it does not form pimples after burning, and can be pinched into powder with fingers; Artificial leather emits a pungent smell after ignition, and it forms pimples after burning, and consumers sometimes can't tell which are genuine leather shoes and which are made of synthetic leather when buying leather shoes. Generally speaking, genuine leather fabric is a natural material made of animal skin through a series of chemical and physical mechanical processing; Synthetic leather, on the other hand, is made up of synthetic fabrics. There are obvious differences between the two in terms of hand feel and adaptability.

Leather is a denatured and non-perishable animal skin obtained through physical and chemical processing such as hair removal and tanning. The leather industry covers the main industries such as tanning, shoemaking, leather clothing, leather goods, fur and its products, as well as supporting industries such as leather chemicals, leather hardware, leather machinery, and accessories. The upstream and downstream have a high degree of relevance, rely on the market to pull, slow down the evergreen products, and integrate the characteristics of earning foreign exchange, enriching the people and employment.

Leather is a denatured and non-perishable animal skin obtained through physical and chemical processing such as hair removal and tanning. The leather industry covers the main industries such as tanning, shoemaking, leather clothing, leather goods, fur and its products, as well as supporting industries such as leather chemicals, leather hardware, leather machinery, and accessories. The upstream and downstream have a high degree of relevance, rely on the market to pull, the products are evergreen, and the characteristics of earning foreign exchange, enriching the people and employment are integrated.

The main leathers are pig leather, cow leather, sheep leather, horse leather, donkey leather and kangaroo leather, etc., and a small amount of fish leather, reptile leather, amphibian leather, ostrich leather, etc. Among them, cow leather is divided into cattle leather, buffalo leather, yak leather and calf leather; Sheep leather is divided into sheep leather and goat leather.

Among the main types of leather, cattle leather and sheep leather, its surface is flat and fine, the hair eye is small, the internal structure is fine and compact, and the leather body has a relatively good plump and elastic body, and good physical properties. Therefore, high-grade cattle leather and sheep leather are generally used as high-grade leather materials, which is a higher category of bulk leather.

It belongs to materials such as leather.

Sheepskin contains water, protein, fat and inorganic substances, the latter two contain very little, and the protein extract that constitutes the epidermal layer of sheepskin is mainly keratin; The dermis is mainly composed of collagen and reticulin, in addition to elastin, albumin, globulin and mucin. The epidermis often contains melanin, which is a metabolite of tyrosine.

Reticulin is the main protein that makes up the reticulum, and together with collagen, it makes up the majority of the skin. The fat content of goatskins is similar to that of other animals (e.g. cattle), but the fat content of sheepskins is particularly high.

Sheep leather features:

The pores of the leather grain are flattened and obliquely deep into the leather, and the pores are arranged in a group like scales or serrations.

The pattern is characterized by the shape of "water ripple".