What are bike helmets made of?
Bike helmets take polystyrene, polycarbonate, nylon, sewing thread and polyurethane directly. Trace them back and you pass 27 made things on the way to 11 raw materials.
How bike helmets are made See it on the map
What goes straight in
From the ground: 11 raw materials
- Water through polyurethane
- Crude oil through polystyrene, naphtha
- Natural gas through polystyrene, ethylene
- Air through polycarbonate, acetone
- Rock salt through polyurethane, chlorine
- Coal through nylon, benzene, toluene
- Sulfur through polyurethane, chlorine, sulfuric acid
- Corn through sewing thread, polyester, PET plastic, ethylene glycol, carbon dioxide
- Limestone through sewing thread, polyester, PET plastic, ethylene glycol, carbon dioxide
- Sugarcane through sewing thread, polyester, PET plastic, ethylene glycol, carbon dioxide, baker's yeast, molasses
- Sugar beet through sewing thread, polyester, PET plastic, ethylene glycol, carbon dioxide, baker's yeast, molasses
Made along the way: 22 things
Chemicals and fuels 18
NaphthaEthyleneBenzeneStyrenePhenolPropyleneAcetoneCaustic sodaChlorineNitric acidAmmoniaHydrogenTolueneSulfuric acidPara-xyleneEthylene glycolOxygen gasCarbon dioxide