Ta vprašanja se morda zdijo nesmiselna, vendar so pravzaprav razumna . Večina ljudi si lahko misli, da kolesarske čelade nimajo roka uporabnosti, vendar to še zdaleč od resnice: kolesarske čelade imajo življenjsko dobo in to življenjsko dobo določa veliko dejavnikov
Zakaj se iztečejo kolesarske čelade
Razlog je preprost: kolesarske čelade so narejene skoraj v celoti iz plastičnih materialov, ki pogosto dajejo iluzijo trajnosti ., vendar pa se ti materiali, ki temeljijo na nafti
Različni deli kolesarske čelade so v glavnem narejeni iz plute . Tako imenovani plutovina je dejansko razširjena polistirena, sfera, ki se širi in kompakta, da tvori trdo strukturo, kadar je pod pritiskom in v stiku z vodo, ki učinkovito absorbira kakršen koli vpliv ., to pomeni tudi, da bo to tudi, kar pomeni, da bo to tudi . pomenilo, da bo to tudi ., to pomeni, da bo to tudi ., to pomeni, da bo to tudi ., kar pomeni, da bo to tudi {{2}. Polistiren lahko traja približno 5 let .
Seveda je to odvisno tudi od tega, kako in kako pogosto uporabljamo in skrbimo za kolesarsko čelado . življenjska doba čelade, ki se uporablja enkrat na teden, in čelada, ki se uporablja vsak dan
But judging the life of a helmet by this one material alone is not enough. The outer shell of the helmet is made of molded polycarbonate, which is the hardest and most durable material in a helmet, but high temperatures and continuous use (such as scratches and abrasions) can also cause it to degrade and even loosen the fit with the cork. As a result, the safety of the helmet bo tudi zmanjšan . Glavni razlog za to razgradnjo je izpostavljenost sončni svetlobi, tako da lahko zaščita čelade pred soncem, ko ga ne uporabljate
Not only that, the straps of the helmet are made of nylon, while the adjustment and fastening parts are made of very hard plastic materials. They also experience degradation. In fact, the straps are constantly in contact with one of the areas of the body that sweats most - the area around the ears, and the salt and acid in the sweat will cause a slight corrosion to the straps over čas .
Glavni razlog, da kolesarske čelade potečejo
However, the main reason why helmets fail and need to be replaced regularly is impact. When you hear the word "impact", you may think of a violent fall, but this is not the case. This refers to the small impacts that helmets are subjected to during long-term use: falling to the ground from different heights, colliding with other accessories, being hit during transportation, being hit by stones and flying objects, and large ali majhni padci .
Proizvajalci izrecno navajajo, da je najvarnejši postopek po padcu ali vplivu nadomestiti čelado . Morda si mislite, da seveda pravijo, da zato, ker morda poskušajo prodati svoj izdelek ., vendar jim tokrat zaupajte, ker študije testiranja vplivov v lastnem laboratoriju podjetja in zunanjih laboratorijev potrjujejo to {{2}. Stroj . Dejansko mora čelada zdržati vsaj dva udarna testa v dveh različnih točkah ., če čelada ne more zdržati drugega udarca, potem ne bo certificirana .
Zdaj si predstavljajte čelado, ki je že pokvarila po močnem padcu ., ko jo spet zadenete, ne bo zagotovila pričakovane zaščite, kar vam ogroža resne poškodbe . Ne prekrivajte varnostne opreme! It may be the only and most critical element in a cyclist's safety, saving thousands of lives every year. If you doubt the manufacturer's advice, don't blindly follow their recommendation to replace your helmet every 2-3 years. But be sure to listen to the science and don't continue to use a helmet that is decades old, especially one that has cracked or been dropped Pred . Ne pozabite, da je cena čelade, ki jo kupite danes
