The chipper/conveyor setup description is kind of a simplification but it isn't too far from reality. Meeting spec for plastics processors usually means going through their partners and only. Except for baled material, no plastic recycler I know of will buy any amount of "pre-processed" stuff from a collector like you or me. The 3D printer filament makers are especially touchy, since the applications are so fine-tuned and their customers are very discerning.

Can you reach out to Blue Planet as a representative of the corporation which bought the medical equipment and gave it to you? If you present as a "services technician" or "contracted waste specialist," they may be more inclined to deal with you, since you won't technically be on your own.