<p>I am in college and am doing a team competition to print PPSU filament, and get the best results. This is being put on by the Solvay company, who makes the material. Our team signed up and the university bought us an <a href="https://www.intamsys.com/" rel="nofollow noreferrer">Intamsys</a> <a href="https://www.intamsys.com/funmat-ht-3d-printer/" rel="nofollow noreferrer">Funmat HT</a> 3D Printer, which said it was capable of printing PPSU. However, the company doing the competition did not release the information that the bed plate must be a high temperature to avoid warping (Greater than 200 °C). However, our plate only reaches a temperature of 160. Does anyone know of any aftermarket heaters that would work with this printer?</p>

<p>Maximum temperatures according to Intamys: Chamber 90 °C, Magnetic Build Plate 160 °C, Extruder 450 °C</p>

If you're a brave individual you might try insulating the bottom of your heated bed. You're going to want to get fiberglass or something that can actually withstand the temperatures you're trying to reach; anything past about 230 °C and you'll get organic things like cork and cotton starting to smoke. 200 °C is pretty absurd for a print bed temperature unless you're printing some pretty exotic materials.
Aside from insulating the bottom of the bed to aid in heat retention, you might also try getting an external FET chip for your heated bed, like is recommended for the RAMPS1.4 boards since their connectors don't handle high amperage loads well. External FET plus a 24 V PSU might give you the kind of temperature range you're apparently aiming for. Best of luck with that, and try not to set your entire setup on fire, 200 °C really is kind of absurd for an entire print plate.
TL;DR:
Insulate
External FET chip
24V PSU