Leather Knowledge Introduction Leather Shoe Material Classification

< p > 1, help material: make < a target= "_blank" href= "http://www.91se91.com/" > shoes < /a > material is called material.

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< p > 2, natural leather for shoes: leather for boot upper is called shoe leather.

There are many kinds of shoe leather, which can be divided into two categories: natural leather, which is represented by hunting, cattle and sheep leather. < /p >

< p > synthetic leather: synthetic material is mainly < /p >.

< p > (1) natural leather (genuine leather) < /p >

< p > full grain leather: called "full grain leather" with the natural surface of < a target= "_blank" href= "http://www.91se91.com/" > leather < /a >.

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< p > modified leather: during the leather making process, the original grain of animal was lightly decorated.

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< p > suede leather: in the tanning process, the face or villi of the leather are used as the surface and collectively referred to as suede leather.

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< p > (2) < a href= "http://www.91se91.com/news/" > synthetic leather < /a > /p >

< p > artificial leather: PU artificial upper leather: < a target= "_blank" href= "http://www.91se91.com/" > textile > /a > product, with surface coating PU < /p >

< p > PVC foam: coated with polyvinyl chloride < /p > on the base of textile foam.

< p > synthetic leather: PU synthetic upper leather: with no textile as the base, the surface is coated with PU < /p >

< p > polyvinyl chloride synthetic upper leather: non-woven fabric as the base, coated with polyvinyl chloride < /p > surface.

< p > (two) < a href= "http://www.91se91.com/news/index_c.asp > > Natural Leather > /a > performance characteristics < /p >

< p > 1, the location of natural leather and fibrous tissue < /p >

< p > the location of natural leather is divided into six parts: the buttock, the back, the neck, the shoulders, the abdomen, the armpit and the limbs according to the characteristics of the animal skin itself.

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< p > buttocks: the fibrous tissue of this part is compact, high strength and good bending resistance. It is the best part of the whole leather, and its value is the largest.

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< p > back: smooth surface, fine grain, second only to the buttocks.

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< p > neck shoulder: located in the anterior part of the back, its fibrous tissue is slightly looser than its back, with rough surface and many wrinkles.

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< p > abdomen: at the abdomen of the animal, located on both sides of the buttocks, the fibrous tissue in this part is soft, thin and extensible, but lacks elasticity: its physical strength is also poor.

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< p > armpit: at the junction between the front and rear legs and the abdomen, it is a small half garden, and its quality is the worst part of the whole leather.

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< p > limb: animal legs, hard texture, small skin area is the secondary part of the whole leather.

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< p > 2, leather property characteristics < /p >

< p > skin Hunting: characterized by subcutaneous fat development, and hunting wool with three roots as a group of glyph, which is deep and penetrated through the entire dermis. The hair root is concentrated in a fat cone. After making shoes, the grain is coarser and less smooth than that of the cow skin. Secondly, the fiber bundles of the hunting leather are stronger and interweave densely. Therefore, they have greater strength and wear resistance. At the same time, the knitting pattern of their fiber bundles varies with the different parts of the skin.

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< p > > a href= "http://www.91se91.com" > cow hide > /a > yellow cattle skin: characterized by small pores, fine grain surface, thin surface, high tensile strength, uniform thickness and poor location, high utilization rate, tight fibrous tissue in the buttocks, loose fibers in the abdomen and shoulders, and more soft and thin axilla, but the occupancy ratio is very small.

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< p > buffalo skin: characterized by long hair, thick fiber, loose tissue, large part of the body, and back of the Gadfly eye or the bottom of the Gadfly.

Compared with yellow cattle skin, the fibers are thinner and slightly softer, second only to yellow cattle hide.

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< p > sheepskin and sheep skin: the sheep skin is dense, the epidermis is thin, the tensile strength is low, the elongation is large, and the fat content is large.

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< p > goat skin: the appearance is similar to coarse wool sheep skin, and its grain is smooth and meticulous.

Fiber bundles are more tightly knitted than sheep skins.

Fiber bundles are also more robust. Leather is soft and stretches. The thickness of the neck and abdomen varies greatly, and the sheepskin is more resistant to folding.

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< p > miscellaneous skin and horse hide: its parts are closely different. The horse's stock is very hard, and its water permeability and air permeability are small.

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< p > deer skin: it refers to the skin of family deer, wild deer and chamois.

The characteristics are soft, large porosity, toughness and extension.

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< p > all natural leather products have extensibility, breathability and water absorption.

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< p > 4, the performance characteristics of synthetic leather < /p >

< p > the production of synthetic leather shoes has been widely used. Its main characteristics are as follows: < /p >

< p > corrosion resistance: the surface of synthetic leather is coated with plastic. Therefore, it is not easy to contact with mild acid or alkali, chemical reaction occurs, and moth proofing is good.

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< p > Water Repellency: synthetic leather has better waterproof performance, moisture is not easy to penetrate into the inner layer, and can be scrubbed with wet cloth after surface contamination, and its luster is inconvenient.

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< p > smooth surface and uniform material: because the surface coating has no defect, the leather surface is smooth, beautiful, bright and colorful, and the material thickness is uniform.

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< p > poor air permeability: the fibrous structure of the base is sealed by the coating on the surface, so its air permeability is very poor (< /p >).