Safety footwear products are mainly divided into cold bonding process and injection molding (also called pouring) process, and the injection process is because the production equipment is expensive, and the equipment and technology are introduced for the pursuit of quality by the few domestic enterprises. Among them, MKsafety® It is an enterprise that introduced this equipment and technology, which is used in the production of safety shoes, protective shoes and professional shoes. The cold bonding process, as the name suggests, is that the outsole and the upper surface are bonded by special glue for footwear. The commonly used outsole is rubber sole, MD sole, and PU sole; and the injection molding process uses a special injection molding machine to complete the outsole and the upper surface. In combination, the outsole material is PU, TPU, etc.
The outsole used by the cold-adhesive leather shoe manufacturer comes from external procurement, and is directly designed by a professional outsole factory or the shoe factory provides the last type. The sole factory makes the outsole according to the design requirements of the leather shoe factory. Due to the cooperation of professional and numerous outsole supporting manufacturers, the style renovation of cold-adhesive shoes is faster and leads the trend. Most of the fashion shoes and formal shoes are produced by cold-adhesive technology. Because of the rich styles of cold-adhesive shoes, this is also the main reason why cold-adhesive shoes can become the choice of people who pursue fashion. Because cold-bonded craft shoes use adhesive to connect the upper, insole, and outsole together, the process is simple and the production is convenient, especially no requirement for mass production, and flexible production procedures for production enterprises, which are very popular among production enterprises. . However, the fatal disadvantage of the cold-bonding process is that the probability of opening the finished shoe is high, which affects the service life of the product. Shoe glues such as neoprene adhesives, polyurethane adhesives, SBS adhesives, etc. will soften or harden due to changes in temperature, humidity and other environments, causing the adhesive parts to melt and form degumming; shoes vary in pressure due to different wearing habits. It will open the glue; if the production process control is negligent, it will also cause degumming; the quality of the outsole material and the quality of the glue will also affect the adhesion fastness. , The wearing time of formal shoes is not long (calculated if each person owns 4 pairs of shoes a year, each pair of shoes should be worn for no more than 3 months, and they should be worn in turn, and new styles will be purchased with the fashion trend), so Don’t pay attention to the degumming phenomenon, focus on the style. Of course, most of the high-quality leather shoes abroad use the cold-bonding process. They have very high requirements on process details, materials, and glue. They control the output and even require workers to only produce 2 pairs of shoes a day. The price of such delicate products is not high. Philippines, a pair of up to 500-1500 US dollars.
Injection molding shoes is a process in which the outsole and the upper surface are combined at one time by using a special injection molding machine, also known as the continuous injection molding process. The sole material is poured into the outer mold from top to bottom and bonded with the upper. method, referred to as pouring. The material of the outsole is mostly PU, TPU and so on. The process is to use mechanical equipment to complete the bonding and assembly of the bottom and the bottom under manual control, without glue bonding, and the bonding is firm and does not degumming, so it has the advantages of high production efficiency and automated production, plus PU, TPU The material’s physical properties of lightness, oil resistance and slip resistance make it widely used in the production of safety shoes, labor insurance shoes, occupational shoes and sports shoes. There are health shoes specially developed for the elderly abroad. Soft, shock-resistant, wear-resistant, the elderly are not easy to slip. However, because the outsole for injection molding is developed and put into the mold by the shoe factory and installed on the injection molding machine for production, the outsole has a single color, a long product update cycle, and a lack of rich styles. In addition, it adopts semi-automatic production, which is only suitable for large-scale production orders.
The injection process was successfully developed by German DESMA company in the 1970s and used in footwear production. After decades of technological improvement and upgrading, computer-controlled automatic production has been realized. It is the current advanced shoemaking process. PUMA, ADIDAS and other internationally renowned sports shoes Manufacturers have successively purchased DESMA injection shoe machines for the production of sports shoes and running shoes, in order to reduce the weight of the shoe body, increase the rebound and anti-shock effect, be sturdy and durable, and improve the coefficient of friction. Since the whole process of DESMA injection shoe machine is controlled by computer, some unstable factors caused by manual control of the injection molding process have been changed, so the quality has been improved again. The pouring head of the domestic continuous injection shoe machine manually pours the PU/TPU material into the outsole mold from top to bottom, while the DESMA shoe injection machine injects the PU/TPU stock solution from the bottom of the shoe to the outsole mold through high temperature and high pressure. It is tightly adsorbed with the leather-polished uppers and feet, and through the action of high pressure, the PU/TPU stock solution penetrates into the leather layer to achieve a firm and non-degumming effect. Shock-resistant cushioning to improve wearing comfort. When Anbang designs safety shoes and professional shoes, in addition to meeting the safety protection performance and being picky about materials, it also takes into account the working environment, comfort, product fastness and other requirements of such professional shoe users. Only use this secondary injection process technology to improve product quality and comfort, and increase product value.