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The Material Surface Of Sole

2008/7/10 9:40:00 41972

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Sole material: the structure of the sole is rather complex. In general, it can include all the bottom materials, such as the outsole, the middle sole and the heel.

In a narrow sense, only the outsole, the general characteristics of sole materials should be wearable, water resistant, oil resistant, heat-resistant, pressure resistant, impact resistant, elastic, easy to fit for foot type, easy to shape after molding, heat preservation, easy to absorb moisture and so on. At the same time, it must cooperate with the middle sole, and have various functions such as braking, sliding and easy stopping when walking and changing feet.

The structure of the sole is rather complex. In general, it can include all the bottom materials, such as the outsole, the middle sole and the heel.

There are many kinds of materials for shoe sole, which can be divided into two kinds: natural base material and synthetic base material.

Natural base materials include natural leather, bamboo, wood and so on. Synthetic base materials include rubber, plastic, rubber and plastic materials, regenerated leather, elastic cardboard and so on.

(1) natural leather

Natural leather is a special leather for making shoes, boots and sole.

According to their different raw materials, they can be divided into yellow cattle hide leather, buffalo leather bottom and pig skin leather. According to their different uses, they can be divided into outer leather, inner leather, main leather and inner Baotou leather. According to their different tanning methods, they can be divided into chrome tanned leather, vegetable tanned leather and tanned leather. According to their different levels and positions, they can be divided into leather, leather, ox side leather and cattle shoulder leather.

The characteristics of natural base leather: because of the different Tanning Methods of natural leather, they have different properties and have their own characteristics.

(1) the characteristics of vegetable tanned leather are: leather is thick, hard bottom is big, nail force is big, and water absorption is small and plasticity is strong.

However, the resistance of vegetable tanned leather is poor.

The characteristics of chrome tanned leather are: good wear resistance, high water absorbency, high strength and good heat resistance.

Combined with the characteristics of tanning bottom, the surface properties are basically the same as those of vegetable tanned leather, but the heat resistance and wear resistance are improved.

(two) synthetic base material

1. Rubber base material

Raw rubber can be divided into two categories: natural rubber and synthetic rubber.

Natural rubber: the raw rubber material produced by the processing program of impurities, solidification, smoking, drying and so on, collected from the cutting edge of the rubber trunk.

Natural rubber comes from tropical and subtropical rubber trees.

Synthetic rubber: a byproduct of the petrochemical industry, which produces different physical properties of raw rubber according to different needs.

Commonly used such as: SBR, NBR, EPDM, BR, IIR, CR, Q, FKM and so on.

However, due to the difference of synthesis methods, the same kind of rubber can separate several kinds of raw rubber, and by setting the formula, any type of rubber material can be changed into hundreds of raw rubber materials that meet the needs of the products.

Rubber materials used in shoemaking are characterized by abrasion resistance, high elasticity, waterproof, acid and alkali resistance.

A: Ingredients: natural rubber, synthetic rubber.

1), natural rubber: the advantage of natural rubber is that it is very soft, elastic and suitable for all kinds of sports, but the disadvantages are obvious.

Indoor sports shoes are mostly made of natural rubber.

2), synthetic rubber: it is also divided into wear-resistant rubber, environment-friendly rubber, air rubber, sticky rubber, hard rubber and carbon rubber.

(1) wear resistant rubber: wear resistant and toughness of wear resistant rubber are very good, so they are very durable. This rubber material is generally used on the sole of tennis shoes.

Environmental rubber: also known as recycled rubber, this rubber outsole contains up to 10% of recycled rubber, mainly for environmental protection.

Air rubber: Rubber contains air, which has a certain damping function, but it is not very wearable. It is not widely used.

Sticky rubber: sticky rubber is characterized by good flexibility, and very skid resistant, generally used in indoor sports shoes.

Hard rubber: hard rubber is the most comprehensive rubber in the material of the rubber, which is tough, skid resistant and wearable, and has a wide range of uses.

Carbon rubber: carbon is added to ordinary rubber materials to make the rubber more tough and wearable.

B: according to the finished product, it can be divided into: rubber sheet, strip material, rubber compound, molding base and so on.

Rubber sheet material: rubber sheet material refers to the rubber material processed into a certain thick base.

For example, the outsole, the middle sole and the surface of the women's shoe, shoe and shoe.

Strip material: strip material is a rubber material that has been processed into a certain specification and shape.

Such as the outer rubber strip, seam shoes with the bar and so on.

Rubber base material: rubber base material is a kind of unstable rubber compound in the raw rubber condition. When making the outsole, it adopts mould pressing technology, so as to achieve the standard of helping the bottom.

Forming base: molding degree is rubber material which is pressed and vulcanized after the rubber mixing.

Such as the whole palm molding bottom, with the forming bottom and rubber front palm.

2. Rubber and thermoplastic elastomers.

Rubberized and thermoplastic elastomers are new materials made of rubber and plastics after physical blending or chemical methods. They overcome some shortcomings of the two materials and are the ideal synthetic materials for shoes. They are lightweight, waterproof, anti-corrosive and wear resistant. They are widely used in shoemaking technology, such as imitation leather bottom, EVA rubber base and so on.

Rubber and plastic is a general term for rubber and plastics industry. They are all subsidiary products of petroleum.

They are all the same in origin, but in the process of making products, their physical properties are different, and their uses are even more different.

Rubber is widely used in tires. Plastics are becoming more and more widely used in technology and market.

Simply speaking, the most essential difference between plastic and rubber is plastic deformation when plastic occurs, while rubber is elastic deformation.

In other words, plastic deformation is not easy to restore the original state, and rubber is relatively easy.

The elasticity of plastic is very small, usually less than 100%, and rubber can reach 1000% or more.

Most plastic forming processes are finished after molding process, and the vulcanization process is needed after the rubber forming process is finished.

Plastic and rubber belong to polymer materials. They are mainly composed of two atoms of carbon and hydrogen, and others contain a small amount of atoms such as oxygen, nitrogen, chlorine, silicon, fluorine and sulfur.

At room temperature, plastics are solid and hard to stretch and deform.

The rubber has low hardness, elasticity, stretches and becomes longer, stops stretching and recoveries.

This is due to their different molecular structures.

Another difference is that plastic can be recycled and reused many times, while rubber can not be recycled directly. It can only be processed to make reclaimed rubber before it can be used.

The morphology of plastic at more than 100 degrees to 200 degrees is similar to that of rubber at 60 to 100 degrees.

Broadly speaking, rubber (synthetic rubber) is actually a kind of plastic, including rubber (synthetic rubber).

Thermoplastic Elastomers, or TPE, is a new type of polymer material between rubber and resin. It also has the function and properties of traditional heat reversion rubber (soft, elastic and touch), and has the double advantages of easy processing, rapid and recyclable use of general thermoplastics.

TPE is a thermoplastic plastic whose function and properties are rubberized. Therefore, some people call it Thermoplastic Rubbers, or TPR.

It has the features of environmental protection, innocuity and safety, wide hardness range, good coloring and soft touch. It has good weatherability, fatigue resistance and temperature resistance, and excellent processability. It does not need vulcanization. It can be recycled to reduce cost. It can be molded in two times and can be bonded to PP, PE, PC, PS, ABS and other matrix materials.

TPE thermoplastic elastomers (TPE) can be summarized as two types of general TPE and engineering TPE. The industrial TPE produced in the world is: styrene (SBS, SIS, SEBS, SEPS), alkenes (TPO, TPV), dienes (TPO, HCl), vinyl chloride (acetonyl), urethane (ester), ester (acetamide), amide (HCl), organic fluorine (hexane), organosilicon and ethylene, etc., covering almost all fields of synthetic rubber and synthetic resin.

Styrene TPE, also known as TPS, is a block copolymer of butadiene or isoprene with styrene, and its properties are closest to SBR rubber.

It accounts for about half of all TPE.

The representative variety is styrene butadiene styrene block copolymer (SBS), which is widely used in the shoe making industry. It has replaced most of the rubber. Meanwhile, its use in rubber products such as rubbers and rubber sheets is also expanding.

SBS is also widely used as impact modifier for PS plastics. It is also an excellent modifier for asphalt pavement asphalt pavement with wear resistance, crack resistance, soft resistance and anti skid resistance.

The advantages of thermoplastic elastomers are:

(1) it can be machined by a general thermoplastic molding machine, such as injection molding, extrusion molding, blow molding, compression molding, die forming, etc., which can be vulcanized by rubber injection molding machine. The time can be shortened from 20min to 1min.

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