< p > as the most common safety helmet, the FRP safety helmet is made of unsaturated special polyester resin and alkali free high strength fiberglass cloth < strong > a href= "http://cailiao.sjfzxm.com/Matertial/show/material.aspx" > raw material < /a > /strong >, using modern technology and strict detection means. FRP is a good anticorrosive material. It has good resistance to atmospheric, water and common acid, alkali, salt and various kinds of oil and solvents. It has been applied to various aspects of chemical anticorrosion, and is replacing carbon steel, stainless steel, wood, nonferrous metals and so on. It is also an excellent insulating material for manufacturing insulators. Good dielectric properties can be maintained at high frequencies. In addition, FRP has low thermal conductivity, excellent insulation material and ideal thermal protection and ablative material. < /p >
< p > plastic safety > strong > a href= "http://cailiao.sjfzxm.com/Matertial/show/default.aspx" > cap > /a > /strong > the shell is made of high density polyethylene, which is a high degree of crystallinity and non-polar thermoplastic resin. The surface of the original HDPE is milky white with a translucent appearance in the thin section. PE has excellent resistance to most living and industrial chemicals. Certain types of chemicals may cause chemical corrosion and can be used for packaging purposes. HDPE has excellent electrical properties, especially its high dielectric strength, making it suitable for wire and cable. The middle to high molecular weight class has excellent impact resistance, at room temperature and even at low -40F temperature. < /p >
< p > polypropylene plastic safety helmet is mainly made of Propylene Plastics. A thermoplastic resin prepared by polymerization of propylene. There are three configurations of isotactic, random and interrelated substances. Industrial products are mainly composed of isotactic substances. Polypropylene also contains propylene and a small amount of ethylene copolymer. This material is non-toxic, tasteless, small density, high strength, stiffness, hardness and heat resistance. It is superior to low pressure polyethylene. It has higher bending fatigue strength and can be used at about 100 degrees. It has good electrical properties and high frequency insulation, which is not affected by humidity, but it is brittle, durable and easy to wear at low temperature. It is suitable for making general mechanical parts, corrosion resistant parts and insulating parts. Common acid and alkali organic solvents have little effect on them, so they are commonly used in making safety helmets. < /p >
< p > besides, adhesive tape, paper glue and bamboo weaving are all made of safety helmet < < strong > a href= > http://cailiao.sjfzxm.com/Matertial/show/default.aspx > material < /a > /strong >. Now, the national standards for safety helmet materials are more standardized and professional, and some manufacturers have developed high-tech helmet materials. < /p >