The characteristics of PVC are as follow: good plasticity, high temperature resistance, good acid and alkali resistance, oil resistance, water resistance, high insulation, low price, good anti-slip effect, poor air permeability, not folding resistance and easy to break at low temperature, recyclable, It is widely used in shoe materials, but it has been less used because of environmental problems. Some countries prohibit the use of shoe materials.
It has the elasticity and good physical properties of rubber, and its softness is better than PVC, high temperature and low temperature resistance, water resistance, wear resistance and bend is better than PVC, but worse than rubber. The hardness range is wide, and it can also be recycled as thermoplastic materials. It can replace the sole made of PVC, and the price is moderate.
It is a kind of polymer material, which is made of polyester foam and can be divided into oily and water-based. The characteristics of PU are Lighter, good elasticity, soft texture, good air permeability, good wear resistance, bend resistance , acid and alkali resistance and anti-skid properties, excellent tear resistance, good shock absorption, low temperature resistance, but it has poor performance on water permeability and is not water-resistant.
A kind of TPE, The characteristics of TPU are high elongation, good thermo plasticity, excellent wear resistance, high tear strength, high tension, and high tensile force, good bend resistance, hydrolysis and antibacterial resistance, nice anti-slip effect ,oil resistant and flame-retardant. It can be made into transparent or any color products. It can be 100% recyclable. It has the characteristics of both rubber and plastic, and is environmentally friendly.
Good elasticity, good wear resistance, bend resistance, anti-skid, good ductility, stable shrinkage, not easy to crack. It is the best material for soles. However, it has poor air permeability and is not resistant to oil. It is necessary to avoid places such as kitchens where there may be oil stains on the wearing path. Due to the rising awareness of environmental protection, many brands have designated a certain percentage of recycled materials in the rubber raw materials used in their production factories.
It is copolymerized by ethylene and vinyl acetate. If the content of vinyl acetate is higher, the transparency and softness will be improved. EVA has low density and light weight, good physical properties, softness, elasticity and shock absorption, which can relieve foot pressure. It is the same soft in high temperature and low temperature. It’s easy to process, but not wear-resistant and not oil-resistant. Although ethylene and vinyl acetate are non-toxic, but not easy to corrode the characteristics of environmental protection.
The company always holds on the principle of the company founder Mr. Wen Song Jiang, "Do everything better. Create newness continuously". And "Research and Create newness is our sales" to do our best to provide high quality products to meet customers’ needs. We stand the leadership in shoe manufacturing industrial for several years through practice
Kou Yi Iron Works Co., Ltd was established in 1959. In the company's early days, it mainly manufactured hydraulic press and developed a manually operated vertical injection machine that benefited early plastics product manufacturers. Kou Yi sucessfully introduced a spiral straight type injection machine. This machine was widely used by the shoe manufacturing industry in Taiwan.
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