The most important consideration for choosing the most appropriate safety footwear is the hazards that the user will face in the operating environment. Generally speaking, safety shoes must be soft, damp proof, moisture-proof and sweat absorption.
Uppers, rubber, or PVC can be used to prevent penetration of water, but when the safety shoes are made of this material, the wearer feels uncomfortable and unsanitary because of their breathability. There are materials that prevent water penetration but allow air to pass in and out, making the user feel comfortable and hygienic when wearing, but the price is relatively high. It is usually made of genuine leather and has good breathability.
Sole: leather shoes outsole material with rubber, polyurethane, modified PVC, leather shoes in the national industry standard in the bottom of the external folding performance, wear resistance and hardness is provided, with folding, wear testing machine and hardness test. Choose shoes sole pressing with a finger should be flexible, with hand at the end of no small loss, feels sticky, soft bending as well. The rubber outsole shoes more quality problems, and the fault block off phenomenon, this is because the sole manufacturer profit figure of the quality of products, rubber in rubber content is low, with reclaimed rubber and other fillers in excess, the decline in the quality of the sole. The sole must produce an anti-skid function, according to different working environment, the sole material and texture design can increase the friction, has better effect on the anti slip sole; also made into a shockproof and prevent electrostatic and insulation, heat insulation, anti oil etc..
Acid and alkali shoes, leather, acid and alkali shoes can only be used in the lower concentration of acid and alkali workplaces, can not be soaked in acid-base solution for a longer period of time, and its requirements must meet the GB12018-1989 standard.
When the object is falling or colliding, the stainless steel toe can be selected to prevent heavy and sharp material collision. Its requirements are up to the LD50-94 standard.Two. Anti puncture operations have nails, metal waste or other sharp object thorn, cut the soles of the feet risk, you can choose anti piercing function, and its requirements must meet the GB12017-89 standard. It is divided into Anti piercing super 1100N, class I 780N and second class 490N. When purchasing, pay attention to the specific environmental characteristics, and determine the corresponding performance level.Three. Anti-static anti-static essential body can eliminate and prevent the accumulation of static electricity supply shocks below 250V protective footwear. Must be considered the sole insulation, to prevent the harm of electric or electric shock, which is required to GB4285-1995 standard.Four. Electric insulation and electric insulation shoes are protective shoes that insulate people's feet from live objects and prevent electric shocks. Its requirements must meet the GB12011-2000 standards.
