Acid and alkali resistant protective shoes are protective shoes with anti-acid and alkali properties that are used to protect the feet and prevent acid and alkali chemicals. It is used in operations involving acids, alkalis, and chemicals in the chemical industry (fertilizer), medicine (pesticide) and other industries. The damage of acid and alkali to the human body is mainly manifested as skin burning injury, or irritation of skin allergic reactions, resulting in folliculitis and systemic poisoning symptoms.
According to the different parts of the protection, you can use a full face mask (face screen), chemical-proof glasses, breathing protectors, acid-proof work clothes, acid (alkali) gloves, and acid-alkali-resistant protective shoes. Classification Acid and alkali resistant protective shoes can be divided into acid and alkali resistant leather shoes, acid and alkali resistant rubber boots, and acid and alkali resistant plastic molded boots according to their materials. Among them, acid and alkali-resistant leather shoes are made of waterproof leather with acid and alkali-resistant soles, which are generally used in workplaces with lower concentrations of acid and alkali. According to the production process, it can be divided into adhesive type, injection type and molded type. Acid and alkali resistant rubber boots are protective shoes made of all rubber materials through vulcanization. According to the styles, they can be divided into three types: high boots, half boots and light boots. Acid and alkali resistant rubber boots have better acid and alkali resistance. Acid and alkali resistant plastic molded boots are a kind of protective shoes molded from polyvinyl chloride and other polymer materials, which have good acid and alkali resistance.
Acid and alkali resistant leather shoesAccording to the provisions of GB12018-89 “Acid and alkali resistant leather shoes”, the upper leather is subjected to 3.7mol/L sulfuric acid solution (industrial pure), 2.8 mol/L hydrochloric acid solution (industrial pure), and 2.8 mol/L hydrogen. Sodium oxide solution (industrial pure) chemical agent impregnation, the outsole is dipped with 5.3mol/L sulfuric acid solution (industrial pure), 6.0mol/L hydrochloric acid solution (industrial pure), 6.1mol/L sodium hydroxide solution (industrial pure) chemical agent The physical and mechanical properties of the samples after immersion and treatment meet the requirements of Table 1. In addition, the appearance quality is required to have no obvious defects; the finished shoes should be acid and alkali resistant, durable, breathable, comfortable, and convenient for operation; the finished shoes should not have water permeation at the inner suture part of the 4h water; the wear resistance and peel strength of the outsole are consistent Standard requirements; shoe soles should have non-slip patterns; the overall weight of each pair of shoes should not exceed 1.5kg. Acid and alkali resistant rubber boots Acid and alkali resistant rubber boots shall comply with the provisions of GB12019-89 “Acid and Alkaline Resistant Rubber Boots”, with 5.3mol/L sulfuric acid solution (industrial pure), 6.0mol/L hydrochloric acid solution (industrial pure), and 6.1mol/L hydroxide The physical and mechanical properties of sodium solution (industrial pure) after chemical immersion meet the requirements of Table 2. In addition, the finished boots are also required to be acid and alkali resistant, durable, comfortable and easy to operate; the sole has a non-slip pattern; the finished boots are immersed in water with a depth of 50mm for 24h without soaking; the overall weight of each pair of boots does not exceed 2kg. Acid and alkali resistant plastic molded boots shall be in accordance with GB12020-89 “Acid and Alkali Resistant Plastic Molded Boots” with 5.3mol/L sulfuric acid solution (industrial pure), 6.0mol/L hydrochloric acid solution (industrial pure), The physical and mechanical properties of 6.1mol/L sodium hydroxide solution (industrial pure) after chemical agent immersion meet the requirements of Table 3. In addition, the finished boots are also required to be durable, comfortable and convenient for operation; the soles of the boots have anti-skid patterns; the overall weight of each pair of boots does not exceed 2kg.
The equipment equipped with acid and alkali-resistant protective shoes shall be in accordance with the national standard GB11651-1989 “Labor Protection Equipment Selection Rules” and the “Labor Protection Equipment Equipment Standards (Trial)” issued by the State Economic and Trade Commission on March 6, 2000 or local and industry standards. Relevant regulations are implemented. According to the different acid and alkali concentrations of the chemicals in the working environment, different materials of acid and alkali resistant protective shoes can be selected. If the concentration of chemicals in the working environment is low, the ground is dry and there is no obvious effusion, acid and alkali-resistant leather shoes can be used. If the working environment has a high chemical acid-base concentration, the ground is humid or there is obvious effusion, acid and alkali resistant rubber boots or acid and alkali resistant plastic molded boots can be selected. Quality The key to the quality of acid and alkali-resistant leather shoes is the use of waterproof top leather, coupled with acid and alkali-resistant soles. Good waterproof leather is both waterproof and breathable. Acid and alkali-resistant leather shoes generally use processes such as gluing, injection, and molding. The advantage of these processes is that the joint between the upper and the sole has better waterproof performance. If the leather shoes are made by the seam process, the acid-base liquid is easy to leak through the pinholes, so sticky strips should be added at the seams or waterproof glue should be used to seal the pinholes for reinforcement. At present, most acid and alkali-resistant leather shoes use adhesive rubber soles, which are cheaper and have better acid and alkali resistance. The disadvantage is that it is bulkier and less comfortable. Injectable leather shoes, because their outsoles are mostly made of new polyurethane materials, have improved water resistance, better wear resistance and folding resistance, light weight, softness, and better comfort. The disadvantages are poor high temperature resistance and more expensive prices. Acid and alkali-resistant leather shoes should not be immersed in acid and alkali solutions for a long period of time to prevent the acid and alkali solutions from penetrating into the leather shoes and corroding the feet and causing damage. For the use of acid and alkali resistant rubber boots and acid and alkali resistant plastic molded boots, high boots, half boots and lightweight boots can be selected according to the degree of water accumulation in the environment. During use, avoid contact with high temperature, sharp objects that damage the surface or sole of the boot and cause leakage, which will affect the protective function.
Since plastics and rubbers are prone to aging and affect their service life, after each wear of this type of product, the acid-base liquid on the boots should be rinsed with clean water and dried, and direct sunlight should be avoided when drying. Transportation and storage Acid and alkali resistant protective shoes should be protected from direct sunlight, rain and moisture during transportation and storage, and should not be placed together with acids, alkalis, oils and corrosive materials. The storage warehouse should be well ventilated and dry, and the storage shelves should be at least 200mm away from the ground and walls. Within 1 year from the date of production of acid and alkali-resistant leather shoes, the manufacturer shall ensure that the rubber sole is not sprayed with sulfur. The shelf life of acid and alkali resistant plastic molded boots (polyvinyl chloride material) is 1 year. It is easier for users to judge the appearance quality of acid and alkali resistant protective shoes, while the internal quality needs to check the product’s factory inspection certificate. It is best to check the inspection report issued by a third-party inspection agency recognized by the national government as a judgment. The basis of product quality. Acid and alkali resistant protective shoes belong to special labor protection products. The state implements a safety mark management and production license system for special labor protection products. Manufacturers of such products must obtain the safety mark certificate and industrial product production license issued by relevant state departments before they can produce and sell within the validity period of the certificate. In addition, the manufacturer must also print on the product and packaging a mark that meets the requirements of the standard, accompanied by a product manual and a certificate of conformity, as well as a safety mark and a QS mark. Each product of acid and alkali resistant protective shoes should have the following signs: manufacturer name, shoe number, trademark, certificate, production year and month. The small package should have the name of the manufacturer, the name of the finished product, the number of the shoe, and the trademark. Among them, the small package of acid and alkali resistant rubber boots and acid and alkali resistant plastic molded boots should also have precautions for wearing.
