Because glass fiber can lead to an occupational disease called pneumoconiosis, excessive inhalation of glass fiber will accumulate in large quantities, which will eventually lead to pulmonary fibrosis. Users are advised to do personal protection at work, such as wearing masks, ventilation and other protective measures. Of course, this is hard to say. Everyone's constitution is different, so allergies are different. How often you do it depends on the physical condition of the user.
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In the production of magnesium oxide products, medium-alkali or alkali-free glass fiber should be used, but attention should be paid to choosing wax-free reinforced glass fiber or glass cloth, because the wax wetting agent contains paraffin, vaseline, stearic acid, transformer oil, surfactant and water. Their adhesion to the fiber surface will weaken the adhesion of magnesium materials.
The use of this kind of glass fiber generally needs to remove wetting agent, and there are two dewaxing methods. One is solution washing, that is, boiling with soapy water for 4 hours, washing with clear water, and drying before use. The other is heat treatment, that is, continuous heat treatment is adopted after heat treatment, that is, 350℃/6s, or 350 ~ 450℃/3 ~ 6 min, until the glass fiber is golden yellow. This method has obvious effect and is a common dewaxing method.
The abrasion resistance, abrasion resistance and folding resistance of glass fiber are very poor. After rubbing and twisting, fibers are easily injured and broken. The existence of water on the fiber surface will accelerate the propagation of microcracks when the fiber is rubbed, further reducing the wear resistance and torsion resistance of the fiber. Due to the above shortcomings of glass fiber, it should be noted that the glass fiber and fabric used should avoid friction and moisture during storage and transportation.
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