Introduction Of Rubber Sole, EVA Sole And Other Soles

One. Outsole:

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

Natural rubber: The advantage of natural rubber is that it is very soft, elastic and good, and can be adapted to various sports, but the disadvantage is also obvious that it is not wearable. Indoor sports shoes are mostly made of natural rubber.

2. Synthetic rubber is divided into wear-resistant rubber, environmentally friendly rubber, air rubber, viscous rubber, hard rubber, and carbon rubber.

(1) Wear-resistant rubber: The wear resistance and toughness of wear-resistant rubber are very good, so it is very durable. This rubber material is generally used on the outsole of tennis shoes.

(2) Environmentally friendly rubber: Also known as recycled rubber, this rubber outsole contains up to 10% recycled rubber, the main purpose is to protect the environment.

(3) Air rubber: The rubber contains air and has a certain shock absorption function, but it is not very wear-resistant and the use is not very extensive.

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

(5) Hard rubber: Hard rubber is the most comprehensive rubber in the outsole rubber material. It is tough, non-slip and very wear-resistant. It is also widely used. Most of the multi-purpose shoes and basketball shoes use this rubber to make the outsole.

(6) Adding carbon rubber: Carbon is added to the ordinary rubber material to make the rubber more tough and wear-resistant. Most of the running shoes use this kind of rubber, and the BRS letters are left in the back part of the running shoe sole. Indicates that the base is made of carbonized rubber.

3. Rubberized outsole: This kind of outsole is not common. The raw material of this kind is industrial glue. It is heated by the stirring of the mixer and then into the mold. It is characterized by softness and very non-slip.

  Two. Midsole:

1. Now the sneaker midsole I think I don't say many people will know, that is PHYLON midsole, and EVA midsole is the most common. In fact, both types of midsole belong to the same attribute category (engineering plastics), but why is there a difference in the name? PHYLON originated in the United States. The earliest shoe midsole was called PHYLON. There was no EVA midsole and PHYLON midsole. Later, with the continuous development of footwear products, some big brands of footwear products in Taiwan and South Korea were developed. At the source, the name of the midsole is more systematic, and we have the EVA midsole that we are talking about now. Below I will talk about the difference between the EVA midsole and the PHYLON midsole.

Nowadays, the most used shoe midsole is the PHYLON midsole. The biggest feature of PHYLON is that it is light, flexible and has good cushioning performance. PHYLON is called secondary foaming. The EVA midsole is also very light, but the cushioning performance and flexibility are far less than the PHYLON midsole, and the cost is much lower than PHYLON. The EVA midsole is called a foaming. 

The reason why they have the same properties and different names is that PHYLON is secondary foaming and EVA is foaming.

(1) One-time foaming: The midsole of the shoe that is formed by injecting the material into the mold after being heated at a high temperature is called a foaming midsole, that is, the EVA shoe midsole.

(2) Secondary foaming: After injecting the material into the mold, it is called the secondary foaming midsole by the two high-temperature heating and then firing the finished midsole, which is what we often call the PHYLON midsole. The softness of PHYLON is also controlled by temperature. During the process of firing the PHYLON midsole, the higher the temperature, the higher the density of the burned PHYLON and the harder it is. The smaller the fire, the softer and softer the PHYLON is, so the evaluation of the midsole of the shoe cannot be measured by weight or hardness.

(3) Cloth-burning midsole: the cloth-burning midsole is also the PHYLON midsole, but the best example of a shoe-making technique used by designers to pursue the overall design feel is the shoe midsole and the body of the shoe. The same kind of fabric is used to make the overall combination of the shoe body and the sole, which is also a highlight of the shoe making process. To achieve this kind of process, the PHYLON midsole has been wrapped with the selected fabric, and the high temperature in the mold burns into the midsole of the cloth texture of the LB1 we see.

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

3. Package midsole: Many sneakers now use a built-in midsole structure, also called a midsole. Like the familiar T-MAC series, NIKE's styles are all in the middle of the bag. The bottom of the bag is composed of two parts, the outsole and the upper, but the structure is still outsole, midsole and shoes. The face is composed of three parts, but the midsole is wrapped inside the upper.

Three, Insole and integral sole:

1. Insole: The insole can also be used as a form of midsole. Unlike the midsole, the insole structure is the bottom that is wrapped in the outsole of the shoe. For example, FORCE1, even if it is an insole structure, Instead of the overall rubber outsole as seen from the outside, in fact, the inner side of the rubber outsole is covered with a midsole. This midsole is also called the MD midsole and belongs to one type of EVA foaming.

2. Integral sole:

(1) The most common sole is the EVA one-time foaming sole. This sole has a low cost and is non-slip and poor. After the sole is wet, it is like wearing roller skates. REEBOK's 3D sole is the best "spokesperson" for this EVA foam-molded sole.

(2) PU overall sole: ADI and NIKE do not use a lot of this sole, PU sole is a low-temperature molded sole. The characteristics of the PU bottom are light, but it is not suitable for water. When it encounters water, it will react chemically and the layer will corrode.

(3) Pure rubber sole: Pure rubber sole is mostly used for outdoor hiking shoes, or work shoes, electric shoes. The whole sole is composed of all rubber, and the advantage is that it is wear-resistant and non-slip. The disadvantage is that the weight is too large. CAT work shoes generally use this sole, also known as insulated soles.