Question about fuzes for small rounds (20 to 57mm)

i have a question
i would know if exist plastic or bakelite fuzes for high explosive shell for 20mm to 57mm
thank in advance for your responses

Not that I have seen any being made entirely of plastic but some existed with combined materials, in particular the 40 and 57mm VT fuzes.
Of course there is a lot of room for experimental stuff but many automatic gun systems cause an extreme high feeding stress on the cartridges and in particular on the fuzes which may touch gun parts during the feeding and ramming process so plastic would not be the first choice.

You may show us images or the document stating on this and we may say a bit more after viewing.

thank for your response
now i know the reason for because they not exist plastic fuzes for these calibers (i forgot the automatic fire of these weapons)