Simple confusion about the special material of

by:LASERRPAIR     2020-02-18
Because the specific protective functions of protective glasses are destined to be different from the materials used by ordinary glasses, it is normal for such different materials to cause doubts due to unfamiliarity. Does not cause damage to vision. I. Material performance ? ??1. Strength performance. It must reach 45g at normal temperature. The steel ball can drop freely from the height of 0.6m to the center of the lens without any damage. ? ??2. Corrosion resistance. After immersing the metal parts in a boiling 10% sodium chloride solution for 15 minutes, remove them immediately, retain the remaining liquid on the parts, dry them at room temperature for 24 hours, then rinse them with warm water and wipe them dry. Observe the surface without corrosion . ? ??3. Flame retardant performance. The plastic material requires self-extinguishing within 5 seconds from the source of the fire. ? Material maintenance ? ??1. Improper use may cause deformation. Hold the glasses frame with both hands when wearing and removing the glasses. To avoid damaging the glasses with too much force with one hand. Be sure to handle it gently, with the lens facing up to avoid lens wear. ? ??2. If not used for a long time, it is recommended to store it in the glasses case. ? ??3. Do not place the glasses in a humid, high-temperature environment, avoid direct sunlight, and do not place them with chemicals, drugs, insect repellents and other odorous items. ? Third, the material impact ? If it is used normally, there should be no problem. The protective glasses are only used for protection during labor operations, and will not cause any adverse effects. . ? But if you wear it for a long time, it will hurt a lot and you need to rest your eyes often.
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