The first category: injection molding work shoes
Injection is the shoe produced by the introduction of Desma Lianbang injection molding machine. After the upper is tied to the aluminum last, the PU (chemical name polyurethane) material is directly injected by the turntable machine to form the sole at one time. Advantages: Because it is mainly machine-made, if the output is large, the price will be cheaper, and the quantity is small, and vice versa. Disadvantages: If there are many styles, and the quantity is small, it is very troublesome to change the mold, the shoes are difficult to shape, and the workmanship of cold glue shoes is not exquisite, so it is generally suitable for orders with a single sole style.
Second category: cold sticky work shoes
Cold sticky shoes are often said to be handmade. Italian and Spanish famous brand shoes belong to this category. Generally, cold-adhesive assembly line processing is used, and cold-adhesive soles are generally provided by factories specializing in the production of soles. The method is to use a plastic last to shape the upper and glue it together with the sole. Advantages: fine workmanship, better shoes. Disadvantages: The daily output is small and the price is high. Generally, only medium-sized factories can produce scale.
Materials for work shoes
1, the sole material
There are common rubber, vulcanized rubber, or polyvinyl chloride. The sole function is mainly wear resistance, chemical corrosion resistance, heat insulation and oil resistance, but due to the different characteristics of the materials, the functions are also different. The midsole of labor protection shoes is equipped with a steel sheet to prevent the sole from being pierced by nails or hard objects. In addition, shoe soles made of certain materials can reduce the generation of static electricity or slow down the speed of static electricity discharge. This can control the possibility of explosion or fire caused by static electricity.
2. The material of the shoe body
Leather, artificial leather, polyvinyl chloride and synthetic fibers are common. These materials have their own advantages. For example, the leather shoe body is more durable and wearable, and it is more comfortable to wear, but the function of resisting corrosive liquid damage is not good. Artificial leather can be used in the case of waterproofing, corrosive chemicals or other pollutants, but if its surface is damaged, its function will be affected. Polyvinyl chloride is more suitable for wet and slippery environments, and it is also easy to clean, but it can be decomposed by some chemicals. The body of synthetic fiber is easier to clean and can resist the decomposition of chemicals.