> For the complete documentation index, see [llms.txt](https://wiki.polymaker.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.polymaker.com/polymaker-wiki/polymaker-wiki-zh/ji-chu-zhi-shi/fun-3d-printing-facts/no-material-is-fda-approved-as-food-safe.md).

# 没有任何材料获得 FDA 认证为食品安全

目前，我们没有任何数据可以证实任何 3D 打印材料符合 FDA 食品安全要求。事实上，市面上没有任何 3D 打印材料持有 FDA 食品安全认证。这是因为食品安全认证不仅适用于原材料，也适用于最终打印出的物体本身。物体的形状、所使用的打印平台类型、打印环境以及整个制造过程等因素，都会影响该物体是否可被视为食品安全。现阶段，FDA 并未针对 3D 打印材料提供专门的认证。

即使耗材材料本身被认为是食品安全的，3D 打印过程通常也会削弱这种安全性。熔融沉积成型的分层特性会在层与层之间形成微小的缝隙和空隙，这些地方很容易滋生细菌和污染物。这些微小空间使得彻底清洁变得极其困难，因此，虽然该物体可能适合一次性使用，但要可靠地进行消毒以便反复接触食品则具有挑战性。此外，打印时使用黄铜喷嘴还可能带来另一项安全隐患。黄铜含有铅，在打印过程中，少量铅可能会转移到打印件表面。这种污染也会使打印部件在食品用途上存在潜在的不安全性。由于这些因素——包括材料、工艺和设备——在考虑将 3D 打印物体用于任何与食品相关的应用时，必须谨慎对待，通常还需要额外的后处理、密封或认证，以确保安全。

{% embed url="<https://www.youtube.com/shorts/DYyIM3XRGSI>" %}


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