The role and classification of the insole
First, what is the role of the insole
1. The insole prevents the foot from slipping inside the shoe. The footbed in the shoe is flat, but the foot of the person is not, so the foot will slide in the shoe while walking, and each step will require a little more effort, and long walks will easily cause various injuries. The three-dimensional insole can fill the vacancy of the sole of the foot and the footbed to prevent the sole of the foot from sliding inside the shoe.
2, insole can provide foot support to improve the stability of the pace. The insole with the foot-shaped wrap can reduce the swing of the heel when walking, and stabilize the heel to keep the roots neutral, thus reducing fatigue and foot strain.
3, the insole can absorb shock absorption. There are two ways, one is to use a hard cup-shaped heel or a shock absorber. The fat muscle of the human heel is a natural shock absorption and shock function, as long as it is matched with a hard rubber or shock-absorbing sticker of suitable curvature. It can exert a good shock absorption and shock absorption function. The other is to use soft materials, such as GEL, air cushion, etc. to absorb the impact of the foot when landing, suitable for running, basketball and other high-running movements.
4, insole can correct walking and standing posture. This is the function that the orthopedic insole can play. Many people have natural and other factors. When standing, the spine and the leg bones cannot be 100% vertical, or they can walk left and right while walking. Various bone and joint traumas, with orthopedic insoles can correct the posture of walking and standing, thus reducing trauma.
Second, the classification of insoles
According to the material of the insole on the market, it can be roughly divided into: cotton insole, insole made of natural materials such as hemp, rattan, grass, paper, leather insole, GEL insole, EVA insole, high polymer breathable cotton insole and PU insole. Large variety.
1. Traditional cotton insoles. Pure new cotton material processed, should be classified as environmentally friendly insoles, advantages: good ventilation, can absorb some odor, no toxic side effects on the skin. Disadvantages: poor plasticity, no sweat absorption, easy deformation. During the walking process, it often slides or pulls out in the shoes, which increases the troubles of the wearer. For the person with big sweat, the whole shoe is like a heavy rain in the loess pile due to poor sweat absorption, a muddy, painful Unbearable. At the same time it does not have the function of deodorization. In addition, most of these insoles are made by hand workshops or simple factories. Most of the raw materials are from recycled waste clothes, hospitals, hotels, hotels, contaminated and worn sheets, industrial scraps, black cotton processing. Felt and so on. Such insole materials are generally made without any sterilization and sterilization, and the surface is covered with a new layer of fabric. The bacterial content of such insole is seriously exceeded, which is an important source of transmission of athlete's foot infection. The relevant department calls it a garbage insole.
2, pure natural environmentally friendly materials insole, hemp, rattan, grass, paper and other insoles. Advantages: The material is natural and environmentally friendly, and has some antibacterial effects and good ventilation performance. Disadvantages: Because workmanship is difficult to fine, which affects comfort and beauty, there are also defects in the shoe that slide easily.
3, leather insoles (faux leather insoles). Advantages: Comfortable and elegant, suitable for people with less sweating on their feet. Disadvantages: The leather insole will become stiff after aging, and the leather insole will only absorb odor, will not deodorize, and has poor hygroscopicity. Therefore, it is not suitable for those who have more sweating and have a foot odor. In addition: this kind of insole leather is generally processed and colored, mainly for pig rind and cow two layers, three layers of cattle, and the leather insole is mostly made of crushed leather and smashed and pressed. Imitation leather insole is poorly breathable, inhaling sweat can change color, and can contaminate the socks or upper lining.
4, GEL elastomer insole (silicone insole). Advantages GEL elastomer has superior shock absorption, excellent cushioning and long-lasting comfort, avoiding pain and fatigue of the feet and joints during walking and exercising, reducing the shock to the spine and hindbrain, suitable for people who are walking and exercising frequently. use. Disadvantages: poor ventilation.
5, EVA insoles. Vinyl acetate copolymer, polymer material. Advantages: light weight, good elasticity, good flexibility, not wrinkle, suitable for all kinds of climate. Disadvantages: poor air permeability, poor resilience for a long time, but high-elastic EVA can solve such problems.
6, environmentally-friendly high-polymeric breathable cotton insole, represented by "Hai Bo Li", English high-poly, also known as "Bao Li You" polyyou, the main ingredient is polyurethane, which has good breathability, super strong Water absorption rate, excellent deformation resistance, good deodorization effect, shock absorption and rebound function, conform to the stress change of the foot during the stay time, especially long-term, high-intensity exercise, is a variety of brand sports The ideal insole material for casual shoes.
7, PU insoles. Polymer polyurethane synthetic material. Advantages: high density, hardness, toughness, wear resistance, good elasticity, not easy to wrinkle, mostly used for the outsole of shoes. Disadvantages: easy to yellow, poor elongation, poor ventilation.
The role and classification of the insole