How should recognize pu sole?

Release time:

2018-06-14

The sole of PU should be one of the wear-resistant soles.

PU foam is dissolved into a gelatinous model and then heated to make it foam. The surface of the finished product is smooth, and it will turn yellow and corrode after a long time. It has certain shock absorption and stability.

Now I don't think many people will know the midsole of sneakers, that is, PHYLON midsole and EVA midsole are common. In fact, the two midsole belong to the same attribute category (engineering plastics), but why do they have different names? PHYLON originated in the United States. The early midsole of shoes was called PHYLON, and there was no distinction between EVA midsole and PHYLON midsole. Later, with the continuous development of footwear products, taking some major brand footwear product research and development factories in Taiwan and South Korea as the source, the name of midsole was divided more systematically, and what we now call EVA midsole was born. Below I will talk about the difference between EVA midsole and PHYLON midsole.

At present, the midsole of shoes is mostly PHYLON midsole. PHYLON is characterized by light weight, good elasticity and good cushioning performance. PHYLON is called secondary foaming. EVA midsole is also very light, but the cushioning performance and elasticity are far less than PHYLON midsole, and the cost is much lower than PHYLON. EVA midsole is called a foam. The reason why they have the same attributes, but different names and different properties is that PHYLON is a secondary foam, while EVA is a foam.

(1) a foaming: the material is injected into the mold and heated by high temperature after a forming of the shoe midsole, it is called a foaming midsole, that is, EVA shoe midsole.

(2) Secondary foaming: After the material is injected into the mold, the shoe midsole is fired after two high-temperature heating. The hardness of PHYLON is also controlled by temperature. In the process of firing PHYLON midsole, the higher the temperature, the greater the density of the fired PHYLON, and the harder it is. The smaller the temperature, the lighter and softer the PHYLON will naturally burn out. Therefore, the evaluation of the quality of the midsole cannot be measured by the weight or the degree of hardness.

(3) cloth burning midsole: cloth burning midsole is also PHYLON midsole, but designers use a shoe-making technology in order to pursue the overall design feeling. For example, the shoe midsole and the shoe body use the same cloth, which makes the combination of the shoe body and the sole as a whole, which is also a bright spot in the shoe manufacturing process. The realization of this process is to wrap the formed PHYLON midsole with the selected cloth and burn it at high temperature in the mold to become the shoe midsole with cloth surface texture like LB1 we see.

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

3. Package midsole: Now many sneakers use built-in midsole structure, also called package midsole. Like the familiar T-MAC series, NIKE's style series all belong to the structure of the bag midsole. From the outside, the bag midsole consists of two parts: the outsole and the upper, but the structure is still composed of the outsole, the midsole and the upper, except that the midsole is wrapped inside the upper.

4.PU overall sole: ADI and NIKE do not use this kind of sole very much. PU sole is a low-temperature forming sole. PU bottom is characterized by light, but not water, encounter water will occur after the chemical reaction and a layer of corrosion.

5. Considering the shoes wear better, try to choose PU,NR,BR,SBR and so on.

Aging is mainly weather resistance, oxygen resistance, UV resistance. If it is to export shoes, taking into account the high temperature of about 80 degrees. (temperature of container)

Sole is more color products, additives to choose no pollution. The filler is mostly white carbon black.

Considering the impact of cost, the traditional vulcanization system is used.

Key words:

Strengthening Our Safety Foundations: Jinyi Footwear Materials in Action

Application of elastomer TPE in artificial turf

Recommend News