What's the material of the safety helmet?
ABS material has good impact resistance and will not decline rapidly at low temperature. Of course, materials suitable for helmet production generally use ultra high impact ABS material, otherwise the impact test is not qualified. In addition to this part of North America, such materials do not use this material to produce helmets, which are widely used in other countries.
ABS plastic full name for acrylonitrile butadiene styrene resin, that is, in English Acrylonitrile Butadiene Styrene abbreviation, this engineering plastics with heat resistance, high surface hardness, dimensional stability, good chemical resistance. At the same time, electrical insulation has good performance, is seldom affected by temperature and humidity, and remains constant in a wide range of frequency variations. In addition, its chemical properties are very good, and have little influence on water, inorganic salts, alkalis and acids.
There are a lot of production safety cap materials, materials commonly used at home and abroad production safety helmet shell are: ABS material, HDPE material and PC material, FRP material; the cap hoop internal structure, mainly composed of LDPE, PA and other materials produced by HDPE; the top liner or sponge composite nylon material production, suction the sweat belt from PVC film, acrylic fiber or cloth towel sponge material, acrylic and polyester with cap hoop corresponding connecting piece. The main products of the main helmets in the world are briefly described as follows: (according to international practice, classification of safety helmet materials)
PC plastic is polycarbonate material (Polycarbonate). The material steel is hard and tough. It has high impact resistance, high dimensional stability, good electrical insulation and high temperature resistance. Because of its high price, other countries rarely use it except japan. Of course, because some of the PC materials have good temperature resistance, many metal smelting industries need this kind of high temperature resistant PC safety helmet.
HDPE plastic is High Density Polyethylene. This material has high surface hardness, good heat resistance, electrical insulation and dimensional stability. It is widely used in safety helmet production. But the compressive strength of the material, if the shell internal structure and the thickness of the product design is not improved, often lateral pressure test is not qualified, so this material safety cap must strengthen the anti pressure design, or in Europe, Australia, Japan and Chinese standard is difficult to get through. As the North American Standard has no side pressure, HDPE helmets are widely used in the Americas, while in Japan, South Korea and other countries, HDPE helmets are not produced.
