What Is a Shoe Block?

The structure of the sole is quite complex. In a broad sense, it can include all materials that constitute the sole, such as the outsole, the midsole and the heel. In a narrow sense, it refers only to the outsole. The common characteristics of general sole materials should have abrasion resistance, water resistance, oil resistance, heat resistance, pressure resistance, impact resistance, good elasticity, easy to fit the foot type, difficult to deform after shaping, Insulation, easy to absorb moisture, etc. At the same time, it must also cooperate with the midsole. When walking and changing feet, there is a braking effect to prevent slipping and easy stopping. There are many types of sole materials, which can be divided into two types: natural and synthetic. Natural base materials include natural base leather, bamboo, wood, etc. Synthetic base materials include rubber, plastic, rubber-plastic composite materials, recycled leather, elastic cardboard, etc.

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The outsole is the part where the shoe contacts the ground.

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

PHYLON midsole

I do nt think a lot of people will know about sneaker midsoles, that is, PHYLON midsole and EVA midsole are the most common. In fact, both midsoles belong to the same attribute category (engineering plastics), but why are there different names? PHYLON originated in the United States. The earliest shoe midsoles were called PHYLON, and there was no distinction between EVA midsole and PHYLON midsole. Later, with the continuous development of footwear products, some of the major brand footwear research and development factories in Taiwan and South Korea were The source, the more systematic the name of the midsole, we have what we call the EVA midsole. Let me talk about the difference between EVA midsole and PHYLON midsole.

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The insole can also be regarded as a form of the bag insole. Unlike the bag insole, the structure of the insole is the sole wrapped in the outsole, such as FORCE1, even if it is an insole structure, unlike the appearance Looking at the overall rubber outsole, the inner side of the rubber outsole is actually covered with a shoe midsole. This midsole is also called MD midsole, which is a type of EVA primary foaming.

(1) The most common type of integrated sole is EVA primary foamed sole.

During the entire service life of the footwear, the sole must undergo a process of constant flexion without the formation of cracks or breaks. This article describes the test methods and equipment used to evaluate the crack resistance of shoe soles.

Due to the strain of the foot flexion, the sole may wear and crack or break. As the sharp edge cuts through the notches and punctures, cracks or fractures will also occur, and they will gradually become cracks during continuous flexion.

The boom in sole material has been a dramatic process over the past 70 years.

1. In the 1930s, sole materials were leather, wrinkled thin rubber plates and wood blocks. We can not use wooden boards as a regular material for shoemaking, despite the existence of clogs-interestingly, clogs have allowed people to relive the era of World War II when there was a shortage of commonly used materials.

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Rubber-plastic synthetic bottom

The rubber synthetic bottom is referred to as imitation leather bottom, which is a highly elastic material. It is light and comfortable to wear, without sound, non-slip and wear-resistant. It uses rubber as the base material and 10% to 30% high styrene. The sole has both good elasticity and high hardness and rigidity, and its performance is very similar to natural leather.

Beef tendon (jin)

The light yellow, translucent sole has a beautiful appearance, has good elasticity and abrasion resistance, and is comfortable to wear. The beef tendon sole can be made of rubber, plastic, or thermoplastic elastomer (TPR).

Pu bottom

From the perspective of elasticity, wearing comfort and wear resistance, Pu bottom is better. The price is the most expensive compared to beef tendon and plastic. It is made by foaming polyurethane emulsion through high temperature machine. The sole is very lightweight.

Plastic sole

There is a distinction between new plastics and old plastics in traditional sayings. The common raw material is resin powder, which is mixed with calcium carbonate to produce a sole with high density and high weight. Abrasion resistance is average. The old plastic is recycled material, including materials such as PVC, leather seat leather, luggage leather and other crushed materials, after crushing and adding black charcoal and oil. Old plastics are characterized by lightweight, low-cost shoe soles (about one-tenth of polyurethane). Finished shoes are often exported to tropical countries.

Leather sole

The leather sole is a sole that can automatically breathe and drive the feet to breathe, and can automatically release the absorbed sweat to keep the feet dry. Its main features:

Have good thermal insulation to ensure the proper temperature of the foot in the shoe;

Light weight, the weight per square centimeter between 0.95 and 1.05 grams is exactly the same as the density of water. Can be waterproof and released when the shoes are no longer wet, ensuring the shoes are comfortable;

Unique three-dimensional fiber structure, the sole does not break when bent at 180 degrees. It can quickly adapt to the shape of the foot, can effectively support the impact of the ground, and protect the foot more effectively than soles of other materials of the same thickness.