How to identify various soles? Combination of sole components RB, EVA, TPU, air cushion and column: RB+EVA=MDRB+EVA+ air cushion RB+EVA+ column RB+EVA+TPU+ air cushion r b+ EVA+TPU+ column MD, EVA 1. 1. what is MD: model or PHYLON? MD is the abbreviation of mould pressing. EVA composite rubber outsole is molded by mold 2. So what is PHYLON: (commonly known as dragonfly) is a kind of midsole used as sole, which is a mixture of EVA foam heated and compressed. It belongs to EVA secondary high-pressure forming products. It is characterized by light weight, good elasticity and good seismic performance. The hardness is controlled by the foaming temperature. 3. So what is EVA: ethylene vinyl acetate-vinyl acetate fiber? The full name of the shoe door is ethylene vinyl acetate copolymer. 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, PVC, TPU, TPR, TR 1. What is Rb: Rb is the abbreviation of English rubber; Rubber includes natural rubber and synthetic rubber (see Appendix 1 for details). Rubber: used for soles of various sports shoes. 2. What is 2.PU? Polyurethane polymer synthetic material, which is often used as a high-density durable material with foamed rubber as the main material in the back palm? 3. What is PVC: PVC, yellowish, translucent and shiny. Whitening will appear at the bend. 4. What is TPU? The full name is thermoplastic polyurethane, which is a linear polymers material produced by the reaction of diisocyanate, macromolecular polyol and chain extender. 5. What is TPR? Thermoplastic rubber is a material with both rubber and thermoplastic properties. It has the nature of rubber and can be recycled according to thermoplastic processing. Rubber products can be made by injection molding, extrusion molding and blow molding with ordinary plastic molding machine. 6. What are the synthetic materials of 6.TR: TPE and rubber? There are many patterns in appearance, good feel, bright color and high finish. Identification and characteristics of soles made of various materials: PU is the lightest and most wear-resistant. Of course, the price is the most expensive. The sole made of PU material is easy to recognize, and it is very light to hold in your hand. The holes on the back of the sole are round. The soles made of PVC are heavier in your hands than those made of TPR. The soles made of TPR are more elastic than those made of PVC. If you hold the soles tightly, they will naturally fall off. If it can bounce, TPR's PVC soles are cheaper than TPR's. But the quality is not good, especially in winter, and it is easy to break the bottom. One feature of PVC soles is that they have no injection holes and smell with their noses. If left for a long time, it will turn white. TR's sole surface is very bright. Harder than ordinary TPR soles. TR has more injection holes than TPR. The injection hole is special. Weight: rubber is the heaviest, PU, PU. EVA and TPR are moderate, and PVC is the cheapest technology: TPR is one-time molding, and PVC needs processing. ABS is generally made of high heels, which are expensive and difficult to use: PVC is mostly used for lining or non-load-bearing parts, or for children's shoes; PU leather can be used for footwear fabrics or load-bearing parts. In bagging, PVC leather is more suitable. This is because the items in the bag are different from the feet worn in the shoes, and will not emit hot air; You don't have to bear personal weight. The difference between PU and PVC is relatively easy. From the corner, the base fabric of PU is much thicker than that of PVC, and there are differences in hand feel. PU feels soft. PVC feels hard; You can also use fire. PU tastes much lighter than PVC. Appendix 1: 1. Natural rubber mainly comes from rubber tree with three leaves. When the epidermis of this rubber tree is cut open, milky white juice will flow out, which is called latex. Natural rubber is obtained by coagulation, washing, molding and drying. Synthetic rubber is artificially synthesized, and different kinds of rubber can be synthesized by using different raw materials (monomers). 2. Universal rubber refers to rubber that partially or completely replaces natural rubber, such as styrene-butadiene rubber, cis-butadiene rubber and isoprene rubber. , mainly used for manufacturing tires and general industrial rubber products. General rubber is in great demand and is the main variety of synthetic rubber. Styrene-butadiene rubber: Styrene-butadiene rubber is polymerized from butadiene and styrene, and it is the general synthetic rubber with the largest output, including emulsion polymerized styrene-butadiene rubber, solution polymerized styrene-butadiene rubber and thermoplastic rubber (SBS). Cis-1, 4- butadiene rubber: prepared by solution polymerization of butadiene. Cis-polybutadiene rubber has excellent cold resistance, wear resistance and elasticity, and also has good aging resistance. Most of cis-polybutadiene rubber is used to produce tires, and a small part is used to make cold-resistant products, cushioning materials, adhesive tapes, rubber shoes and so on. The disadvantages of cis-polybutadiene rubber are poor tear resistance and poor wet skid resistance. Isoprene rubber: Isoprene rubber is the abbreviation of polyisoprene rubber, which is produced by solution polymerization. Like natural rubber, isoprene rubber has good elasticity and wear resistance, excellent heat resistance and good chemical stability. The strength of raw isoprene rubber (unprocessed) is obviously lower than that of natural rubber, but its quality uniformity and processability are better than that of natural rubber. Isoprene rubber can replace natural rubber to make truck tires and off-road tires, and can also be used to produce various rubber products. Isopropylene rubber: Ethylene-propylene rubber is synthesized from ethylene and propylene, which has outstanding aging resistance, electrical insulation and ozone resistance. Ethylene propylene rubber can be filled with a lot of oil and carbon black, and the product price is low. Ethylene propylene rubber has good chemical stability, and its wear resistance, elasticity and oil resistance are close to those of styrene butadiene rubber. Ethylene propylene rubber is widely used, which can be used as tire sidewall, rubber strip, inner tube and automobile parts, and can also be used as wire and cable sheath and high voltage and ultra-high voltage insulation material. You can also make light-colored products, such as rubber shoes and sanitary products. Neoprene rubber: it is made of chloroprene as the main raw material by homopolymerization or polymerization of a small amount of other monomers. For example, it has high tensile strength, excellent heat resistance, light resistance and aging resistance, and oil resistance is better than natural rubber, styrene-butadiene rubber and cis-butadiene rubber. It has strong flame retardancy and excellent flame retardancy, high chemical stability and good water resistance. The disadvantages of chloroprene rubber are poor electrical insulation and cold resistance, and the raw rubber is unstable during storage. Neoprene rubber has a wide range of uses, such as making covering materials for transportation belts and transmission belts, wires and cables, making oil-resistant hoses, gaskets and chemical-resistant equipment linings.