How Can We Really Identify TPR Sole, MD Sole And MD Rubber?

First, explain the meaning of several abbreviations of sole materials (mainly for sole materials)
MD、EVA
1. What is MD first: general name of MODEL or PHYLON flying dragon
2. What is PHYLON: (commonly known as Feilong) is a kind of material for sole. It is a kind of mixed material made of heated and compressed EVA foam (EVA secondary high-pressure molding product) It is characterized by light weight, good elasticity and shock resistance, and its hardness is controlled by the foaming temperature.
3. What is EVA: Ethylene Vinyl Acetate - vinyl acetate A light, flexible chemical compound. Therefore: MD soles must contain EVA, and MD soles are also called PHYLON soles. For example, MD=EVA+RB or EVA+RB+TPR, and some shoes are RB+PU.
RB、PU、PVC、TPU、TPR、TR
1. What is RB: RB is the abbreviation of rubber; Rubber includes natural rubber and synthetic rubber (see Appendix I for details). Rubber: used for soles of various sports shoes.
2. What is PU: Polyurethane polymer polyurethane synthetic material, which is often used as a high-density durable material based on foam rubber in the midsole interlayer of the back palm
3. What is PVC: polyvinyl chloride? Its natural color is yellowish, translucent and shiny. Whitening will appear at the inflection.
4. What is TPU: its full name is Thermoplastic Polyurethane, which is a linear polymer material produced by the joint reaction of diisocyanate, macromolecular polyol and chain extender.
5. What is TPR: Thermoplastic Rubber, It is a material with the characteristics of both rubber and thermoplastic. It has the properties of rubber and can be processed and recycled as thermoplastic. It can be made into rubber products by injection molding, extrusion molding and blow molding with ordinary plastic molding machines
6. What is TR: The synthetic material of TPE and rubber has many appearance patterns, good hand feeling, bright color, high smoothness, high technical content, and can be 100% recycled. It is an environment-friendly sole material.

Identification and characteristics of each material sole:
Identification of PU, PVC, TPR, RUBBER, etc!
PU is the lightest and most wear-resistant Of course, the price is also the most expensive The PU soles are easy to recognize. They are light in the hand. The holes on the back of the soles are round PVC soles are heavier than TPR soles The elasticity of the TPR soles is better than that of the PVC soles. Hold the soles firmly and they will naturally fall down. If they can bounce up, the TPR PVC soles are cheaper than the TPR soles, but the quality is poor. Especially in winter, the soles are easy to break One of the characteristics of the PVC soles is that there is no injection hole, and if you smell it with your nose, it has a smell If left for a long time, there will be white things. The surface of TR's sole is very bright It is harder than the general TPR sole TR has more injection holes than TPR The injection hole is very special
Weight: RUBBER (rubber) is the heaviest, PU and EVA are the lightest, material: PU is expensive, EVA and TPR are moderate, PVC is the cheapest  
Technically: TPR is made into one shape, while PVC needs to be processed. ABS is generally made of high heels, expensive and hard  
Application: PVC is mostly used in lining or parts not bearing weight, or in making children's shoes; PU leather can be applied to the fabric of shoes or the parts bearing weight. In terms of bags, PVC leather is more applicable. This is because the items in the bag are different from the feet in the shoes and do not emit heat; No need to bear personal weight. The difference between PU and PVC is relatively easy. From the angle of view, the bottom cloth of PU is much thicker than PVC, and there are also differences in the feel. The feel of PU is softer; PVC feels harder; You can also use fire to burn. The smell of PU is much lighter than that of PVC.