Acid and alkali resistant safety shoes are safety shoes that have acid and alkali resistance and are used to protect the feet and prevent acid and alkali chemicals. Used in chemical (fertilizer), pharmaceutical (pesticide) and other industries involving acid, alkali, and chemicals.
Acid and alkali damage to the human body is mainly caused by skin burning damage, or irritating skin allergic reactions, causing folliculitis and systemic poisoning symptoms. According to different protection parts, you can use full face mask (face screen), chemical glasses, respiratory protector, acid-proof overalls, acid-resistant (alkali) gloves and acid-resistant safety shoes.
Classification
Acid and alkali resistant safety shoes can be divided into acid and alkali resistant shoes, acid and alkali resistant rubber boots and acid and alkali resistant plastic molded boots. Among them, the acid-resistant leather shoes are made of waterproof leather with acid and alkali resistant soles, which are generally used in workplaces with lower concentration of acid and alkali. According to the production process, it can be divided into adhesive type, injection type and molding type. The acid and alkali resistant rubber boots are safety shoes that are vulcanized and formed of all rubber materials. According to the style, they can be divided into high boots, half boots and light boots. Acid and alkali resistant rubber boots have good acid and alkali resistance. The acid-resistant plastic molded shoe is a safety shoe molded by using a polymer material such as polyvinyl chloride, and has good acid and alkali resistance.
Acid and alkali resistant shoes
Acid-resistant leather shoes according to GB12018-89 "acid-resistant leather shoes" regulations, leather 3.7mol / L sulfuric acid solution (industrial pure), 2.8 mol / L hydrochloric acid solution (industrial pure), 2.8 mol / L sodium hydroxide solution ( Industrial pure) chemical agent impregnation, the bottom is impregnated 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, after treatment The physical and mechanical properties of the samples are in accordance with Table 1. In addition, the appearance quality is required to have no obvious defects; the finished shoes should be resistant to acid and alkali, wear-resistant, breathable, comfortable and convenient to work; the finished shoes should not have water permeability in the seams within 4 hours of soaking; the outsole wear and peel strength are in accordance with Standard requirements; the sole should have a non-slip pattern; the overall weight of each pair of shoes does not exceed 1.5kg.
Acid and alkali resistant rubber boots
Acid and alkali resistant rubber boots should be in accordance with GB12019-89 "acid and alkali resistant rubber boots", 5.3mol / L sulfuric acid solution (industrial pure), 6.0mol / L hydrochloric acid solution (industrial pure), 6.1mol / L sodium hydroxide solution (industrial The physical and mechanical properties of the pure chemical agent after impregnation are in accordance with Table 2. In addition, the finished boots are also required to be resistant to acid and alkali, durable, comfortable and convenient to operate; the bottom of the boot has a non-slip pattern; the finished boots are immersed in water of 50 mm depth for 24 hours without wetting; the overall weight of each pair of boots does not exceed 2 kg.
Acid and alkali resistant plastic molded boots
Acid and alkali resistant plastic molded boots shall be in accordance with GB12020-89 "acid and alkali resistant plastic molded boots", 5.3mol / L sulfuric acid solution (industrial pure), 6.0mol / L hydrochloric acid solution (industrial pure), 6.1mol / L hydrogen peroxide The physical and mechanical properties of the sodium solution (industrial pure) chemical agent after impregnation are in accordance with Table 3. In addition, the finished boots are required to be durable, comfortable and convenient to operate; the soles have an anti-slip pattern; the overall weight of each pair of boots does not exceed 2 kg.
Equipment
The equipment for acid and alkali resistant safety shoes shall be in accordance with the National Standard GB11651-1989 "Rules for the Selection of Labor Protection Products" and the "Standards for the Provision of Labor Protective Equipment (Trial)" issued by the State Economic and Trade Commission on March 6, 2000 or related to local and industry. Regulations are enforced. According to the different acid and alkali concentrations of the working environment chemicals, acid and alkali resistant shoes of different materials can be selected. If the working environment chemical acid and alkali concentration is low, the ground is dry and there is no obvious effusion, acid and alkali resistant shoes can be used. If the working environment chemical has a high acid-base concentration, the ground is damp or there is obvious effusion, you can use acid-resistant rubber boots or acid-resistant plastic molded boots.
Quality
The key to the quality of acid and alkali resistant shoes is the use of waterproof leather, coupled with acid and alkali resistant soles. Good waterproof leather is both waterproof and breathable. Acid-resistant leather shoes generally use adhesive, injection and molding processes. The advantage of these processes is that the joint between the upper and the sole has better waterproof performance. If the leather stitching process is used to make the leather shoes, the acid-base liquid easily leaks through the pinholes, so the adhesive strips should be added at the seams or the pinholes should be sealed with waterproof glue. At present, acid-resistant leather shoes are mostly made of adhesive rubber soles, which are cheaper and have better acid and alkali resistance. The disadvantage is that it is cumbersome and has poor comfort. Injectable leather shoes, due to the use of new polyurethane materials in the outsole, have improved water resistance, good wear resistance and folding resistance, light and soft, and good comfort. The disadvantage is that the high temperature resistance is poor and the price is relatively expensive. Acid-resistant leather shoes can not be immersed in acid and alkali for a long time to prevent acid and alkali solution from infiltrating into the shoes to corrode the feet and cause damage.
The use of acid and alkali resistant rubber boots and acid and alkali resistant plastic molded boots can be used according to the degree of water accumulation in the environment, using high boots, half boots and lightweight boots. During use, avoid contact with high temperature, sharp damage to the boot or the bottom of the boot, causing leakage and affecting the protective function. Since plastics and rubber are prone to aging and affect the service life, after each use, the product should be washed with water to wash the acid and alkali liquid on the boot and dry. When drying, avoid direct sunlight.
Transportation and storage
Acid and alkali resistant shoes should be kept away from direct sunlight, rain and moisture during transportation and storage, and should not be placed together with acid, alkali, oil and corrosive materials. The storage should be well ventilated and dry, and the storage shelves should be more than 200mm away from the ground and walls. The acid-resistant leather shoes shall be guaranteed to not spray sulfur at the bottom of the rubber within one year from the date of production. The acid and alkali resistant plastic molded boots (polyvinyl chloride) have a shelf life of 1 year.
Purchase
The user's appearance quality of the acid and alkali resistant safety shoes is relatively easy to judge, while the intrinsic quality needs to check the factory inspection certificate of the product. It is best to check the inspection report issued by the third party inspection agency approved by the national government department as the quality of the product. The basis of good and bad.
Acid and alkali resistant safety shoes are special labor protection products. The State implements a safety mark management and production license system for special labor protection articles. The production enterprises of such products must obtain the safety mark certificate and industrial product production license issued by the relevant state departments before they can produce and sell during the validity period of the certificate. In addition, the manufacturer must also bear the mark on the product and packaging in compliance with the standard and the product specification and certificate, as well as the safety mark and QS mark.
Acid and alkali resistant safety shoes should have the following marks for each product: manufacturer name, shoe size, trademark, certificate, production year and month. The small package should have the name of the manufacturer, the name of the finished product, the shoe number 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.
When purchasing the above products, the company shall require the dealer to produce the test report of the batch of products, as well as the safety mark certificate and production license of the manufacturer of the product, and file the record.