When arcs and splines are exported as 3D PDF and viewed those objects in Acrobat Reader, they don't appear as smooth curves.
Reproduced Steps:
1. Create arcs and splines (by Sketch or etc.)
2. PMI tab > Publish > Technical Data Package tab > Templates > Method > 3D PDF > select any template listed in template selection window > OK
3. Open the PDF in Acrobat Reader
This behavior is due to a problem that occurred in NX 2212 and lower, and has been fixed in NX 2312.
Workaround : No
The edges that make up solid or surface shapes are smooth, but this is an issue that only occurs with sketches and other wireframe shapes.
**Please refer to PL8794050 for Japanese article.