It's too complete. . . Classification and characteristics of sole materials The main materials of soles are rubber, PU, PVC, MD, TPR, EVA, etc. 1, EVA(E ethylene, VA vinyl acetate): The more vinyl acetate, the better the elasticity. 2, rubber: divided into natural cloth and synthetic cloth, wear-resistant, elastic, heavy, high cost. 3.TPR(T-heat, P-plastic, R-glue): It has rubber properties, wear resistance and low cost, but it will slip when it comes into contact with engine oil and solvent. 4.PU: Excellent abrasion resistance and repeated bending performance, good tear strength and elasticity, excellent oil resistance, acid resistance, alkali resistance and low temperature resistance. The waste PU bottom can be automatically degraded, which is beneficial to environmental protection and more suitable for platform shoes, which requires impact resistance and wear resistance. However, there are some problems such as yellowing, hydrolysis, cracking and easy to open glue. Air cushion shoes and football shoes are commonly used materials. 5, PVC: synthetic resin, medium resistance to the bottom, less used because of ecological and environmental problems, commonly used materials for air cushion shoes and football shoes. 6, MD (Huailongdi): EVA foam molding, good flexibility, high elasticity, good warmth retention, but poor wear resistance, generally high-top shoes are more suitable. 7. thimble plate: also known as outsole bracket, it has the functions of super support, deformation prevention and shock absorption. Generally divided into three types: a, carbon fiber injection tablets: high hardness and high density. B, the material of the projectile: it is a relatively soft material. C, micro-injection PVC: generally used to make small LOGO trademarks. In addition, the basic knowledge of soles was published on September 3, 2008. Source: International Footwear Network I. Outsole:

1. The material of the outsole is simply natural rubber or synthetic rubber.

(1) Natural rubber: The advantage of natural rubber is that it is very soft and elastic, which can be suitable for all kinds of sports, but the disadvantage is also obvious, that is, it is not wear-resistant. Indoor sports shoes mostly use natural rubber.

2. Synthetic rubber is divided into wear rubber, environmental protection rubber, inflatable rubber, viscous rubber, hard rubber and carbon rubber.

Wear rubber (1): wear rubber has excellent wear resistance and toughness and is very durable. This rubber material is generally used on the outsole of tennis shoes.

(2) Environmentally friendly rubber: Also known as reclaimed rubber, this rubber outsole contains reclaimed rubber as high as 10%, mainly for environmental protection.

(3) Air rubber: Rubber contains air, which has a certain damping effect, but it is not very wear-resistant and has not been widely used.

(4) Viscous rubber: Viscous rubber is characterized by good flexibility and very anti-slip, and is generally used for indoor sports shoes.

(5) Hard rubber: Hard rubber is the most comprehensive rubber in the outsole rubber material, which is tough, non-slip and wear-resistant, and has a wide range of natural uses. Multifunctional shoes and basketball shoes mostly use this rubber as soles.

(6) Carbonized rubber: carbon is added to ordinary rubber materials to make rubber more tough and wear-resistant. Most running shoes use this kind of rubber, and the letters BRS will be left on the back of the sole of running shoes, indicating that the outsole is made of carbon rubber.

3. Glued outsole: This kind of outsole is not common. The raw material of this outsole is industrial glue, which is stirred with a blender and then heated in a mold. It is characterized by being soft and very non-slip.

Two. Midsole:

1. Now, I don't think many people know the midsole of sports shoes, that is, PHYLON midsole and EVA midsole are the most common. In fact, both kinds of midsole belong to the same attribute category (engineering plastics), but why do they have different names? PHYLON originated in America. The earliest shoe midsole was called PHYLON, and there was no difference between EVA midsole and PHYLON midsole. Later, with the continuous development of footwear products, the name of the midsole became more systematic, starting from some well-known brand footwear product research and development factories in Taiwan Province Province and South Korea, so what we now call EVA midsole came into being. Let me talk about the difference between EVA midsole and PHYLON midsole.

At present, the most commonly used midsole in shoes is PHYLON midsole. The biggest feature of PHYLON is its lightness, good elasticity and good shock absorption. PHYLON is called secondary foaming. EVA midsole is also very light, but its cushioning performance and elasticity are far less than those of PHYLON midsole, and its cost is far lower than that of PHYLON midsole. EVA midsole is called primary foaming. The reason why the performance is the same, but the name is different, the performance is different, because PHYLON is secondary foaming, while EVA is primary foaming.

(1) Primary foaming: the material is injected into the mold, and the midsole formed by high-temperature heating is called primary foaming midsole, that is, EVA midsole.

(2) Secondary foaming: After the material is injected into the mold, it is fired at high temperature twice, which is called secondary foaming midsole, which is what we often call PHYLON midsole. The hardness of PHYLON is also controlled by temperature. In the process of firing PHYLON midsole, the higher the temperature, the greater the density and hardness of PHYLON. The smaller the heat, the lighter and softer the naturally burning PHYLON will be, so the evaluation of the midsole cannot be measured by the weight or hardness.

(3) Cloth midsole: Cloth midsole is also a PHYLON midsole, which is just a shoe-making technique adopted by designers in pursuit of overall design. The best example is that the midsole and the shoe body use the same fabric, which makes the shoe body and sole combine into a whole, which is also a bright spot in the production process of this shoe. In order to realize this process, the molded PHYLON midsole is wrapped with the selected fabric and fired in the mold at high temperature, which becomes the shoe midsole with fabric texture that we saw in LB 1.

2.PU midsole: In addition to PHYLON midsole and EVA midsole, PU midsole is also very common. The biggest advantage of PU midsole is its good elasticity and toughness.

3. Midsole: Nowadays, many sneakers adopt the built-in midsole structure, also called midsole. Like the familiar T-MAC series, NIKE's style series belongs to the midsole structure, which consists of outsole and upper, but the structure is still composed of outsole, midsole and upper, but the midsole is wrapped inside the upper.

3. Insole and integrated sole:

1. Insole: Insole can also be made of acid as a form of midsole. Unlike the midsole, the insole structure is wrapped around the bottom of the shoe, such as FORCE 1. Even the insole structure is not the all-rubber outsole it looks like. Actually, the insole is wrapped in a rubber outsole. This midsole, also called MD midsole, belongs to.

2. One-piece sole:

(1)EVA one-step foaming is the most common sole. This kind of sole has low cost and poor skid resistance. When the sole is wet, it is like putting on roller skates. Reebok's 3D sole is the best "spokesperson" for this kind of EVA disposable foam sole.

(3)PU sole: Adi and Nike don't use this kind of sole very much, and PU sole belongs to low-temperature forming sole. PU bottom is light, but it is not suitable for water. When it meets water, it will have a chemical reaction and corrode layer by layer.

(4) Pure rubber soles: Pure rubber soles are mostly used for outdoor hiking shoes, or work shoes and electrician shoes. The whole sole is made of rubber, which has the advantages of wear resistance and non-slip, but is too heavy. Work shoes of cats generally uses this kind of sole, which is also called insulating sole. Air cushion is a cushioning technology for midsole, but it has shortcomings and is not practical for high-density impact. Basketball shoes are generally carbon rubber outsole with EVA or PHYLON midsole, wrapped with cushioning rubber or air cushion, and twisted with carbon plate or TPU.