What is the difference between the material MD and EVA

1. Different properties: rubber is a highly elastic polymer material with reversible deformation. EVA is a rubber and plastic foam made of ethylene-vinyl acetate copolymer and its material.

PU is a polymer material. Polyurethane is an emerging organic polymer material. TPU is calledThermoplastic polyurethane elastomerRubber.

It is mainly divided into polyester type and polyether type.

2. Different characteristics: TPU is a special category of elastomers. PU is widely used in many fields of the national economy because of its excellent performance.

EVA is solid at room temperature, heated and melted to a certain extent into a liquid that can flow and has a certain viscosity. RB can produce large deformation under the action of a small external force, and can return to its original state after removing the external force.

3. Different applications: RB is widely used in all aspects of industry or life. EVA is used to make refrigerator conduits, gas pipes, and civil worksplates, containers and daily necessities, etc.

PU application fields involve light industry, chemical industry, electronics, textile, aviation, etc. TPU is widely used in daily necessities, sporting goods, toys, decorative materials and other fields.

Material innovation. The boom in sole materials has been a dramatic process over the past 70 years or so.

1. In the 30s of the 20th century, the sole material was only leather, wrinkled thin rubber board and woodblock. We don't think of wood as a formal material for shoemaking, despite the existence of clogs Interestingly, clogs relive World War II, when common materials were scarce.

Era. Age vulcanized rubber.

produced, post-war synthetic substances such as styrene.

Polybutadiene rubber and resin rubber began to develop. Resin rubber is a very thin sheet that is still popular for making court women's shoes.

Age polyurethane, thermoplastic substances such as polyvinyl chloride.

And with it. Thermoplastic rubber and thermoplastic polyurethane were put into use.

The era has added EVA.

The above content refers to Encyclopedia - Soles.

EVA is divided into a midsole and an outsole, the midsole is invisible on the inside, and the molded EVA refers to the midsole, which is a foaming material with a certain elasticity. MD is not a material, it refers to a method of embedding the midsole into the outsole, and the material used for the bottom surface is generally EVA plus rubber, so there is no one more wear-resistant.

To see whether a pair of shoes is wear-resistant, you can see whether the sole is made of wear-resistant rubber (non marking), which is generally marked on the sole, and this rubber will be a little worse but very wear-resistant in the outfield.

People who often study shoes or are familiar with shoe materials know that there are actually many classifications of the material of the sole, such as MD sole and EVA sole, but many people have a relatively shallow understanding of this kind of content. So, EVA or MD is better, which is better, MD or EVA material for soles? Let's find out.

The effect of different materials is also different, such as: EVA is mainly a chemical synthetic substance of vinyl acetate, which is lightweight, elastic, flexible, not easy to wrinkle, and has excellent colorability, and is often used for jogging, jogging, casual shoes, football training shoes midsoles, etc.; However, EVA also has the disadvantages of easy water absorption, not easy to corrode, not conducive to environmental protection, and easy to dirty; MD material is also made of EVA material, which belongs to EVA secondary high-pressure molded products, which has the characteristics of light weight, elasticity and good shock resistance, and is often used as the main material for the midsole of running shoes, tennis shoes and basketball shoes, and can also be used for the outsole of casual shoes. The two materials have their own advantages, there is no way to say which one is better, depending on our needs to choose, for example, if we want to choose running shoes, sneakers, etc., you can choose MD soles; If it is a normal shoe, you can choose EVA soles.

That's all for my answer to the question of whether EVA or MD is better. The effect of each different material is different, so we need to choose the right sole for ourselves according to our needs.

MD is softer, more elastic and lighter than EVA.

MD sole is a material that has the characteristics of light weight, elasticity and good shock resistance. It is also called phylon bottom, commonly known as the flying dragon. The hardness is controlled by the foaming temperature.

It can reduce the burden on the feet. EVA sole is a hybrid substance made of heated and compressed EVA foam in the midsole used in general shoemaking. EVA sole has high resilience and tension resistance, high toughness, and good shock resistance and cushioning performance.

Excellent thermal insulation and low temperature performance, can withstand severe cold, closed bubble holes, good sound insulation effect, closed bubble cell structure, no water absorption, moisture-proof, good water resistance, seawater, grease, acid, alkali and other chemical corrosion, antibacterial, non-toxic, tasteless, non-polluting.

MD bottoms have advantages over EVA bottoms and are more comfortable to wear. When the sole is too hard or too thin, the impact force of the ground directly acts on the foot, making the foot easy to fatigue and strain. MD bottom (soft, elastic, light), soft and elastic, in order to evenly disperse the impact.

For every 1 gram added to the weight of a shoe, the burden on the foot is equivalent to adding tens of grams of weight to a person's back. Therefore, it is advisable to choose shoes that are lightweight and elastic to reduce the burden on your body.

The EVA bottom is not as soft as the MD bottom, and the MD is more elastic and lighter than the EVA.

For us laymen, we should be confused when it comes to EVA, and we don't know what it is and what it is used for. In fact, it is very common around us, as long as you pay attention to it, you will see its figure, but when we see its finished product, we don't know what material EVA is, it is inevitable that we will feel that our knowledge is shallow, today I will take you to seriously understand what EVA is and its use and function, I hope you can gain something.

1. What kind of material is EVA?

EVA is a material that is rubber-elastic at room temperature and can melt and flow at high temperatures. EVA material is made of ethylene and acetic acid copolymerization, EVA application field is still quite extensive, and China's annual market consumption is also increasing, especially in the shoe industry, is used in high-end tourist shoes, hiking shoes, slippers, sandals soles and interior materials.

EVA is characterized by good softness, rubber-like elasticity, good flexibility at -50, transparency and surface gloss, good chemical stability, good anti-aging and ozone resistance, and non-toxicity. It has good mixability, colorability and molding processability with fillers. EVA is widely used in foam shoe materials, functional shed films, packaging molds, hot melt adhesives, wires and cables, toys and other fields.

Second, the main role of EVA.

1. EVA materials generally have very good flexibility and strong chemical corrosion resistance, in addition, EVA materials also have strong elasticity, so EVA materials can make a variety of footwear products, which can make us feel more comfortable in the process of using EVA products, and the service life will be increased.

2. EVA material has a good inclusiveness and cross-linkable type, which is not available in other materials, so it can be used in the industrial field and can also be used in some production supplies.

Third, the use of EVA material.

1. EVA material can be used to make household appliances and daily necessities such as conduits, gas pipes, civil construction plates, containers and other household appliances for household refrigerators.

2. EVA material can be used to make packaging films, gaskets, medical equipment, hot melt adhesives, cable insulation, etc.

3. EVA materials are widely used in wireless binding of books, structural parts of digital product shells, furniture edge banding, assembly of automobiles and household appliances, shoemaking, carpet coating and anti-corrosion coating of metals.

1. Foam shoe materials are the most important application fields of EVA resin in China. Because EVA resin blended foam products have softness, good elasticity, chemical resistance and other properties, they are widely used in the soles and interior materials of medium and high-end tourist shoes, hiking shoes, slippers and sandals. It is often used for cosplay prop making and model making.

2. The main purpose is to produce functional shed film, adding a certain amount of EVA resin to make the shed film, which not only has a high light transmittance, but also has a great improvement in anti-fog drop performance, which can generally exceed 4 months.

EVA is a footwear industry, photovoltaic material.

EVA is made of ethylene and acetic acid copolymer, Chinese chemical name: ethylene-vinyl acetate copolymer (ethylene-vinyl acetate copolymer). EVA has a wide range of applications, and China's annual market consumption is increasing, especially in the footwear industry, which is used in the soles and interior materials of high-end tourist shoes, hiking shoes, slippers, and sandals.

It is also widely used in the field of new energy, such as photovoltaic materials, solar cell adhesives, etc.

Generally, the content of vinyl acetate (VA) is 5%-40%, compared with polyethylene (PE), EVA is widely used in foamed shoe materials, functional shed films, packaging molds, hot melt adhesives, wires and cables, toys and other fields due to the introduction of vinyl acetate monomer in the molecular chain, which reduces the high crystallinity, improves toughness, impact resistance, filler compatibility and heat sealing performance.

EVA: Vinyl acetate copolymer, polymer material. It is often used in jogging, jogging, casual shoes, and foot training shoe midsoles.

Advantages: lightweight, good elasticity, good flexibility, not easy to wrinkle, excellent colorability, suitable for various climates.

Disadvantages: easy to absorb water, not easy to corrode, not conducive to environmental protection, easy to dirty. tpr：

It is injection molded with TPR pellet after hot melting, and is commonly used for jogging, jogging, casual shoe midsoles, and outsoles.

Advantages: easy to shape, cheap;

Disadvantages: heavy material, poor abrasion (not wear-resistant), poor softness, poor bending (not resistant to bending.

Poor shock absorption.

PHYLON (MD): It is an EVA secondary high-pressure molded product, the main material used in the midsole of running shoes, tennis shoes and basketball shoes in the world, and can also be used for the outsole of casual shoes.

Advantages: lightweight, elastic, fine appearance, good softness. Easy to clean, good hardness, density, tensile strength, tearing, elongation.

Disadvantages: not easy to corrode, not conducive to environmental protection, easy to wrinkle and shrink at high temperatures. Rubber: used in the outsole of various sneakers.

Advantages: good wear resistance, anti-slip, elastic, not easy to break, good softness, good elongation, stable shrinkage, good hardness, good bendability.

Disadvantages: heavy weight, easy to vomit frost (a quality problem), not easy to corrode (environmental protection problem).

MD is phylon

EVA is EVA

I don't have a non-slip message for these two materials.

However, MD is more wear-resistant and better shock absorption.

However, the substrate may be rubber.