Protective eyewear is a special role to play in the glasses , using the different needs of different occasions glasses . Such as hospital surgical glasses , welding glasses when using welding , laser engraving laser protective glasses, and so on. Protective glasses , also known as labor glasses, safety glasses and protective mask is divided into two categories, the main role is to protect the eyes and face from UV , infrared and microwave electromagnetic radiation , dust , soot, metals and gravel debris and chemical solutions sputtering damage.
First, the types of safety glasses and use:
1 pieces are solid proof protective glasses, mainly for defense and other metal debris or gravel mechanical damage to the eyes . Glasses and eyeglass frames should be rugged , anti- shock. Cover fitted around the edge of the frame , on which there should be vents. Protective lenses can be used tempered glass, glass or copper mesh glial adhesion HENGDA fire goggle .
2 anti-chemical solution protective glasses, mainly for defense irritation or solution corrosive chemical damage to the eyes . Can use an ordinary plain lenses , frames should be covered to prevent splashing into the solution . Typically used in laboratories , hospitals and other places , the general medical glasses GM.
3 . Radiation protection glasses, too strong for defensive ultraviolet radiation damage to the eye. Lenses using radiation can be reflected or absorbed , but it can be made visible through a special glass. Lens bright chromium plated , nickel , mercury or silver metal thin film numbers , may reflect radiation ; blue lenses absorb infrared , yellow lenses absorb ultraviolet and infrared, colorless lenses absorb X -rays and lead γ rays. For example, common welding glasses, the lens transmittance requirements are relatively low, so the lens color ink mostly dominated ; laser protective eyewear , by definition, can prevent the laser radiation on the glasses , so the lens is demanding, such as for select the decay rate of the light source , the light reaction time, optical density , light effects, different nanometer (nm) laser wavelength requires different lenses .
Second, protective masks are the following :
1 anti- bodies late cuttings and chemical solution splashed into eyes and damage to facial HENGDA fire hood , plastic overlay on both sides and the lower production of transparent plastic with a lightweight , multi-use polycarbonate , respectively, under the ears and toward the lower amount of neck extension , so that the mask can be more fully coated face to enhance the protective effect.
2 heat addition heat protective clothing mask mentioned foil mask , the metal can also be single or double mesh made , but double as well, part of the radiation is blocked and can heat the air. As can be chrome or nickel , can enhance the effect of heat reflection , and to prevent rust .
3 metal mesh mask can also be anti-microwave radiation.
4 welders mask , with a thickness of cardboard fiber, light , heat , and has good electrical insulating mask.