Application of Glass Fiber in Safety Shoes

FRP is a kind of glass fiber composite material, and its comprehensive performance is relatively good. Therefore, the product is widely used, involving more than 20 industries and covering almost all industrial sectors of the national economy. Among them, the largest number of applications are in the chemical, construction, power, light industry, petrochemical, electromechanical, and automotive industries. China's sophisticated fiberglass composites have been widely used in the aviation industry. Currently, this composite material is used on both civilian and military aircraft.

The reason why glass fiber is favored in this field is because it is a new type of functional material and structural material, and has a series of excellent characteristics such as high temperature resistance, corrosion resistance, high strength, small elongation, and good insulation. Glass fiber is an inorganic non-metallic material with excellent performance. It is based on natural ore. After scientific calculation and reasonable ratio of various raw material components, it is homogenized by high-temperature melting, drawing, winding, weaving Cloth and other processes finally formed a variety of products. The diameter of glass fiber monofilaments ranges from a few micrometers to more than 20 micrometers, which is equivalent to 1/20-1/5 of a hair filament. Each fiber bundle has hundreds or even thousands of monofilaments.

The outstanding characteristics of glass fiber are high strength, high elastic modulus, low elongation, electrical insulation, corrosion resistance, etc., and are widely used as reinforcing materials, electrical insulation materials, and thermal insulation materials in composite materials. In all areas of the national economy. FRP is a composite material in which a thermoplastic resin is combined with glass fiber, carbon fiber, and polyamide fiber. Usually, the mixture of these materials is melted and kneaded to form pellets and molded by injection molding. There are also molded sheets made of long fibers and pressed into press molded sheets. The former is aimed at improving the properties of various resins such as heat resistance, dimensional stability, impact strength, or electrical conductivity by using fiber-reinforced materials. The latter aims to produce large-sized products and focuses on the influence of the orientation and content of fibers. The thermoplastic resins used are various, such as AS, ABS, PA, PBT, PC, PET, POM, PPS, etc., and high performance engineering resins, which are used according to their different characteristics.

The application of glass fiber in safety footwear has caused the safety of steel shoes to be replaced by other non-magnetic materials in recent years because of the troubles of security inspection. The application of glass fiber reinforced plastic as the safety toe is an ideal choice, and many companies are currently developing it. The fiberglass safety toe cap, through a large number of experimental research and development, and final product testing, finally screened out the ideal formula to create a high-quality explosion-proof glass fiber safety toe cap.

The indicators of explosion-proof fiberglass safety shoes completely comply with the requirements of the EN-CSA-ANSI standard for safety shoes. It can be heat-resistant at 200°C, cold-resistant at -40°C, and is also resistant to acids and alkalis. It can meet the needs of the footwear production process and is suitable for wearing environments with harsh climate. Experiments show that the fiberglass safety toe is very environmentally friendly, no recycling, long-term exposure to ultraviolet light can be naturally decomposed; with anti-static function, and anti-bacterial, non-toxic, non-volatile objects. In addition, there are advantages such as ultra-lightweight, ultra-thin, and no deformation, which can absorb and decompose the impact force. When encountering a great impact, the toe cap will be cracked radially, and it will not sag and deform like a steel head, so it will not hurt the foot, and thus play an excellent role in protection.

In the production of safety toe caps, steel toe caps use steel molds, and the cost of molds required to change shapes is higher, but the cost of molds for fiberglass toe caps is lower. For the shoe factory, the process does not need to be changed, so it can be easily applied. And compared to steel, aluminum and other alloy toe, fiberglass toe more easily bonded with the material, processing more convenient. In terms of end-user applications, in addition to enjoying the basic safety features, because of the lighter weight of the fiberglass toe, the wearer will feel more comfortable and will not lose balance due to the heaviness of the head.

In addition, some fiberglass elastic cushions have also been developed using the good resilience of fiberglass, and the fiberglass elastic cushions can be used alone or combined in ordinary insoles. The fiberglass stretch pad is molded in a standard foot shape and has a good ability to correct walking posture. The shock-absorbing midsole elastic insole is treated with moisture wicking technology and has excellent shockproof, antibacterial, odor-removal, perspiration, breathability, and comfortable foot feel. It is suitable for all types of shoes. The biggest advantage is its rebound function, so that the wearer's feet are evenly distributed, and because the fiberglass in the glass fiber is arranged in a crisscross pattern, with a strong anti-nail puncture effect.

At present, the global environmental protection concept has been further strengthened. The steel toe cap cannot be separated due to its close fit with the leather or lining material. It is difficult to separate and recycle waste during waste disposal. However, the fiberglass toe cap and shoe upper material can be naturally decomposed and is extremely environmentally friendly. trend. FRP elastic insoles also play a stab-resistant effect on the lumbar iron in safety shoes. Their corrosion resistance, oxidation resistance and excellent springback-free deformation characteristics are bound to be more and more popular in the industry.

China Labor Insurance Network