The Air Cushion Classification Of Sports Shoes Will Provide You With A Detailed Introduction Of Sole Technology.

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In the production process, air cushion used to achieve shock absorption, energy return, decoration purposes are common practice in the production of world sports shoes, and the use of air cushions is very common in the production of sports shoes in China.

However, due to the lack of deep research on the function and performance of sports shoes air cushion, the function and performance of air cushion can not be adapted to the requirements of the products, even because of the use of air cushions, it brings great sports injuries to the wearing people.

Ignoring the research on air cushion not only affects the increase of the added value of sports shoes, but also limits the use of sports shoes in China. It also restricts the deep development of China's footwear industry, and affects the status of China's footwear industry in the world and hinders the development of high-end products.

Classification by material

The influence of different materials on the performance of air cushion is very large.

At present, the most commonly used materials for air cushion are polyurethane (PU), polyvinyl chloride (PVC), thermoplastic polyurethane (TPU), etc.

The following are mainly about polyurethane insole air cushion and polyurethane hollow molding air cushion, PVC soft air cushion and PVC rigid air cushion, thermoplastic polyurethane air cushion and thermoplastic polyurethane air cushion, and their advantages and performance.

Polyurethane (PU)

Polyurethane materials have good comprehensive properties.

It not only has high strength, high elasticity, high compression strength, excellent tear resistance, wear resistance, oxygen resistance and ozone, solvent resistance, such as non-polar solvents hexane, heptane, paraffin oil, etc., has little effect on polar solvent polyurethane, even under high temperature, the swelling of polyurethane in non-polar solvents is also very small, and the quality is light, which is very meaningful for lightweight design of shoes.

However, polyurethane has poor water resistance and high internal heat generation.

Polyurethane insole air cushion is mostly hidden air cushion, fixed between the insole and the middle sole.

The overall thickness of the air cushion is thin, and the internal pressure is small. It is generally used for sports shoes with low requirements for shock absorption design.

Such as golf shoes, badminton shoes and so on, are hidden air cushion design.

Polyurethane hollow molding air cushion is the most widely used air cushion at present. The air cushions used by Nike and other famous brand air cushion series sneakers are almost all polyurethane air cushions.

It can be designed according to the specific location of different parts, different functions and age of the wearer. It can be designed into different internal pressure, different structure, different thickness and different colors. It can achieve different damping effect and different energy regression function, and it can echo with the design of other parts of the shoes, so that the visual effect and sensory effect can be synchronized.

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Polyvinyl chloride (PVC)

PVC raw materials have wide sources, low cost, mature production technology, and can produce pparent and opaque products and soft and hard products according to the different additives and additives. Therefore, the color changes can quickly echo the color changes of sports shoes.

However, the impact strength of PVC is low, thermal deformation is large, and resilience is not as good as polyurethane.

PVC soft air cushion series and thermoplastic polyurethane pull pipe series have similarities in design and use parts. They are mostly used for heel parts. Different color patterns can be designed to achieve double effects of visual effects and visual effects.

PVC rigid air cushion series is made of polyvinyl chloride with high hardness, which is designed to be compressed air cushion of various colors.

Generally used for heel parts, modeling similar to the honeycomb structure.

Thermoplastic polyurethane (TPU)

Thermoplastic polyurethane is the first polymer material that has been found to be elastic and plastic. It has excellent physical and mechanical properties, such as tensile strength and elongation.

Lower, hard (Shao 50~83) tensile strength is high, tear resistance is good, in a wide range of temperature has flexibility, wear resistance and puncture resistance is excellent; crack growth resistance is the best in all thermoplastic materials; anti longitudinal bending strength and low impact strength is high; resilience and cutting resistance is good; oil resistance and weather resistance is good, especially for mineral oil at normal temperature, diesel oil, under the action of ultraviolet light will yellowing, but has little effect on the performance, adding some UV absorbers can reduce yellowing phenomenon; sensitive to acid and alkali, easy to be eroded, test performance can be simulated immersion test. Its chemical structure is different from that of shore hardness, and the tensile strength varies from 25 MPa to 70 MPa, and soft (Shao A70 to 85).

In addition, like all thermoplastics, thermoplastic polyurethane can be recycled. Adding a small amount of leftovers to the new thermoplastic polyurethane will not have any effect on the quality of the product.

Thermoplastic polyurethane pipe air cushion mainly depends on the excellent physical and mechanical properties of thermoplastic polyurethane, high resilience, excellent penetration resistance, excellent crack growth resistance and high impact strength.

In general, the drawing pipe air cushion is used in the heel part, and the shock absorption function is remarkable.

Moreover, the color can be varied, and the rich and colorful effects add to the visual effects of the sports shoes.

The thermoplastic polyurethane air cushion, which should be called "liquid pad", should be called "liquid pad". However, because its function is mainly shock absorption, it belongs to the air cushion type, which takes advantage of the high oil resistance and high elasticity of thermoplastic polyurethane.

It is commonly used in the heel and waist parts to absorb and stabilize the foot.

Classification of parts by structure

Full palm air cushion

The outline is the same as the outline of the outsole, and the exposed air cushion is open outside the window. The thickness of the air chamber at the junction of the bottom edge is about 10-20mm, the wall thickness is 1-1.4mm, and the resilience is relatively high. In the middle part, the thickness of the air chamber is small, about 2-6mm, the elasticity is poor, and the supporting effect of the cross beam is in the middle part. The thickness of the middle solid part is about 2-3mm, which acts as a coupling.

The thickness of the front palm is thinner, generally 10 mm, the heel thickness is generally 20mm, and the whole air cushion from the back to the front is a wedge-shaped structure.

The overall thickness of the hidden palm air cushion is generally 1-1.2mm, the thickness of the air chamber is generally 2-4mm, and the thickness of the solid part is generally the same as that of the edge thickness 1-1.2mm.