So let's take a look at how the new generation of internet celebrities' helmets' were born. Why choose EPS for manufacturing EPS helmet lining? Mainly composed of three points: cheap, lightweight, and easy to use. Is it familiar? That's right, EPS is still a material for manufacturing plastic lunch boxes. In practice, one of the differences between a regular helmet and a high-quality helmet is the quality of EPS. Manufacturers can customize data according to different user needs, but different requirements also mean different prices. EPP insulated box is the best material.
　　After the shaping of the helmet lining mold is completed, there are usually many holes and channels designed for heat dissipation, drainage, pressure release, etc. Generally speaking, each mold is only suitable for one type and size of helmet. It should be noted that the EPS material used for the lining of a helmet in the EPP insulation box is not entirely the same. Depending on the collision strength required for different head parts, the EPS material on both sides and the center of the helmet may vary.
　　The helmet cushion layer plays a buffering role in the event of external impact, and is usually made of materials that can absorb collision energy, are non-toxic, harmless, sweat absorbing, and breathable. Most of them are materials such as expanded polystyrene (EPS), EPP insulated box, expanded polypropylene (EPP), and thermoplastic polyurethane (PU).
　　Due to the non-toxic and odorless nature of foamed polypropylene (EPP) EPP insulation boxes, they can be recycled and gradually replace foamed polystyrene (EPS) materials in the future. Compared to manufacturing polycarbonate helmet shells, polycarbonate helmets are heavier but harder than composite helmets, and composite helmets are often scrapped in accidents.