According to the function classification of safety shoes: toe smash-proof shoes, insulated shoes, anti-static shoes, conductive shoes, steel-making shoes, rubber boots, cold-proof shoes.
(1) Toe protection shoes. Mainly to prevent objects from hurting the feet and toes. Such as rolling drums when carrying heavy loads or loading and unloading materials, heavy pipes hitting the feet or inadvertently kicking sharp metal plates. The front head of the shoe is lined with a metal material with good impact resistance, high strength and light weight. Its strength and impact resistance should be tested and the standard can be used. Be careful to choose safety shoes of different strengths according to the weight of the work.
(2) Insulated shoes. The role of insulated shoes is to minimize the risk of electric shock. Because the current flows into the ground through the human body through the contact point when the electric shock is applied, not only the insulated gloves but also the insulated shoes are required for electrical work. According to the pressure range, there are several kinds of insulated shoes of 20kV, 6kV and 5kV, which must be selected according to the working range. Insulated shoes should be inspected and maintained frequently. If they are wet or worn, they will not be protected.
(3) Anti-static and conductive shoes. Anti-static shoes are suitable for preventing accidents caused by static electricity in the human body, and avoiding accidental electric shock to the human body caused by 220V power frequency capacitor equipment. Conductive shoes are used in places where fire or explosion may occur that is more sensitive to human static electricity. Some of these shoes are safety shoes and rubber shoes with anti-static or conductive soles. The whole shoe does not use metal to reduce the possibility of friction and fire. The shoe is tested for resistance from the beginning. It is then periodically tested to ensure that the maximum resistance of the shoe does not exceed the allowable value.
(4) Steelmaking shoes and shoe covers. These shoes are also called caster shoes, mainly to prevent the burning of the feet. These shoes are resistant to pressure and are not easy to burn. The upper is made of oil-impregnated cowhide and canvas-inlaid leather. The soles are made of tire-lined cow leather. In order to prevent the scalding of molten metal splashing liquid, the high waist is easy to take off. The shoe cover and the trouser legs can also be covered with a shoe cover, and the shoe cover is mostly made of canvas, asbestos and aluminum film.
(5) Rubber boots. According to its use, it has anti-acid boots, waterproof boots and oil-proof shoes. The acid-proof and alkali-resistant boots are suitable for the place where the ground has acid and alkali and other corrosive liquids. They are made of acid and alkali resistant rubber, and also have anti-acid and alkali pants boots with pants and boots. The waterproof boots are used for ground water or splashing. The basic materials are rubber, miner waterproof boots, special boots for aquatic products, and transplanted boots. The oil-proof shoes are used for oily work on the ground, made of rubber or polyethylene plastic, and have boots and shoes.
(6) Cold-proof shoes. It is suitable for wearing in cold and low temperature environment. It has cotton shoes, fur boots and felt boots, etc. It has good thermal insulation performance.
In addition to the above protective shoes, there are also suitable for the construction of road workers to heat the soles, suitable for the reinforcement of the soles of construction workers, protective shoes for the moisture of the soles of food and wine workers, and so on.
Functional standard
Anti-mite--Adopting industry standard (protecting toe safety shoes LD50-94), the inner lining of the toe safety shoes is made of steel toe cap, which has anti-static and impact resistance, stab-proof, anti-mite, very safe, Inspection, pressure resistance is 10KN, toe impact resistance 23KG impact hammer from 450MM height free fall impact on the toe, the shoe deformation gap >= 15MM, mainly for mining, mechanical construction safety, metallurgy, steel, port lifting and other heavy industries Used in the industry to protect the toe from the safety of leather shoes, with rubber and elastomer support, comfortable to wear, and does not affect daily labor operations.
Anti-puncture - protects the foot from stab wounds, can withstand a maximum penetration of 1100N, national special standard.
Anti-static--anti-static leather shoes are produced according to GB4385-1995 standard, and the resistance value ranges from 100K'Ω-1000M'Ω. This product has good air permeability, anti-static, wear-resisting, anti-skid and other functions, mainly suitable for aviation and aerospace. The dangerous industry has played a role in avoiding flammable and explosive accidents caused by static electricity.
Oil resistant - tested according to oil resistance standards, the volume increase is not more than 12%. If the volume does not increase, but shrinks, the reduction is greater than 0.5% of the original volume or the hardness increase is greater than 10 (Shaoer A), and the 40,000 times of cracking is not more than 7 mm according to GB/T3903.1.
Non-slip - rubber tendon bottom, excellent anti-slip performance.
Insulation--Insulated shoes can be worn as auxiliary safety equipment and labor protection articles when working on AC 50HZ, 1000V and below or DC 1500V and below.
Wear-resistant - high quality rubber sole for a variety of environments.
Cold-proof shoes are used for foot protection of low temperature workers to protect against frostbite.
Waterproof - Water shoes are used in workplaces where water or water is splashed.
Quality identification of safety shoes (labor shoes):
1. Identification of upper materials: Nowadays, the common materials for safety shoes in the Chinese market are: velvet leather, transfer leather, broken leather, leather, etc. In recent years, in order to keep pace with the EU CE standards, domestic manufacturers have begun to import. Foreign thickened buffalo that meets European standards. Since the appearance of the transfer leather material and the cowhide is very similar, many consumers cannot judge, and the two materials are now comparatively analyzed.
A look: cowhide (the type of leather, in the leather products industry is a customary name for people to distinguish synthetic leather) surface has obvious irregular patterns and natural pores, cold and folding resistance, good breathability and wicking performance; Generally referred to as natural synthetic leather, it is an artificial surface layer on the loose layer of natural leather. The grain pattern is similar to that of natural leather, but it has no pores and hard feel, but it has good waterproof performance.
Two touches: full of feel, full of elasticity, the hand touches the cold without the sense of cold, the hand feels hard, the cool feeling is mostly the transfer film leather. Three observations from the cross section: there is no obvious film layer on the dermis section. Scratching the base by hand will reveal fluff and become longer and longer, which is the most obvious performance of the fiber base (dermis base); The leather is ground on the loose layer of natural leather or fiber. It is bonded by high pressure adhesive to form a sheet and then put on the artificial surface layer. The surface layer can be scraped with a knife edge. Small pieces peel off.
2, production process: domestic safety shoes production process points: molding, injection, gluing, seams. Injectable safety shoes are light, the sole and upper are high in viscosity, and the outer sole is usually made of polyurethane material, which is wear-resistant and waterproof. Adhesive shoes are a traditional process with a long history of production. Generally, the soles are made of rubber and other materials. The upper is bonded; the price of the sewing tire and the molding process are relatively low-priced products, which are not introduced here.
3, shoes for safety shoes: protection of toe safety shoes need steel toe cap, puncture-proof safety shoes need steel floor, anti-static shoes need anti-static agent and anti-static line, etc., observe, it is necessary to conduct protective performance test to understand whether it meets The supplier is certified to the product grade and the quality of the shoe material is in compliance with the requirements.
4, product comparison: the conventional comparison is divided into 2 ways, one is the cross-sectional anatomical comparison of the finished shoes, after the appearance process is compared, the longitudinal surface of the safety shoes is cut, and the cut surface, the auxiliary material cross section, the sole cross section, and the cross section can be clearly observed after cutting The internal structure and internal process of the steel head, steel bottom plate and shoes, it is worth mentioning that the density of the single-density sole cross section is the same, the hand is harder; the cross section of the double-density sole can observe the upper and lower layers. The density is different, the upper layer density is low, the lower layer density is high, and the elasticity is good by hand; if the sole is two-color molded, but the cross-sectional density is the same, it is also a single-density type. The second is to try on, try on the comfort of the safety shoes, feel the comfort of the shoes through the action of walking, squatting, kicking, heavy stepping and so on.