Brief introduction and characteristics of various safety helmet materials

The FRP safety helmet is made of unsaturated special polyester resin and alkali free high strength glass fiber cloth with modern technology and strict testing methods. FRP is a good anti-corrosion material, which has good resistance to atmosphere, water, general concentration of acid, alkali, salt, a variety of oils and solvents. 1t has been applied to all aspects of chemical anticorrosion and is replacing carbon steel, stainless steel, wood, non-ferrous metals, etc. 1t is also an excellent insulating material for making insulators. Good dielectric property can be protected at high frequency. 1n addition, FRP has low thermal conductivity and is an excellent thermal insulation material, which is an ideal thermal protection and ablation resistant material

the shell of plastic safety helmet mostly adopts high density polyethylene, which is a kind of thermoplastic resin with high crystallinity and non polarity. The original HDPE is milky white in appearance and translucent to some extent in the thin section. PE has excellent resistance to most domestic and industrial chemicals. Some kinds of chemicals can cause chemical corrosion and can be used for packaging. HDPE has good electrical properties, especially high dielectric strength, which makes it suitable for wire and cable. Medium to high molecular weight grade has excellent impact resistance at room temperature or even at – 40F low temperature

polypropylene plastic safety helmet is mainly made of propylene plastic. A thermoplastic resin obtained by polymerization of propylene. There are three configurations of isotactic substance, random substance and syndiotactic substance. 1sotactic substance is the main component of industrial products. Polypropylene also includes copolymers of propylene with a small amount of ethylene. This material is non-toxic, tasteless, low density, strength, stiffness, hardness, heat resistance are better than low-voltage polyethylene, has high bending fatigue strength, can be used at about 100 degrees. 1t has good electrical properties and high frequency insulation, not affected by humidity, but brittle at low temperature, not wear-resistant, easy to aging. 1t is suitable for making general mechanical parts, corrosion-resistant parts and insulation parts. The common acid and alkali organic solvents have little effect on it, so they are commonly used in the production of safety helmets

in addition, adhesive tape, paper glue and woven bamboo are the raw materials for making safety helmets. Now, the national standards for safety helmet materials are more standardized and professional, and some manufacturers have developed high-tech safety helmet materials

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