HP自家的工業級3D列印機印的PA12料，目前代工過的樣品強度非常好，官方宣稱也可以過汽油測試
"For HP 3D High Reusability PA 11, PA 12, and CB PA 12, based on internal HP testing, June 2017. Tested with diluted alkalies, concentrated alkalies, chlorine salts, alcohol, ester, ethers, ketones, aliphatic hydrocarbons, unleaded petrol, motor oil, aromatic hydrocarbons, toluene, and DOT 3 brake fluid "

普立得有代工
http://www.3dprinting.com.tw/products/detail/405

但要求氣密應該很難~