What's the hardness of the cap after ABS material expires?
General ABS is not long-term climate resistance, that is to say ABS helmet due to the outdoor long-term withstand ultraviolet radiation, can lead to aging performance of the material itself, the main performance is the fade, white, anti scourability, hard and brittle hair down.
It must be expired. The performance of the expired safety helmet has declined rapidly. The unqualified safety helmet is not allowed to be worn.
