PLA is biodegradable. Just only under industrial conposter conditions so yeah still a problem.
But a plastic is just a chain of polymers, it makes it difficult but not impossible to biodegradability depending on chemical and structure. Almost all plastics don’t but some do
I don’t know what you are doing in the plastics industry, but it seems that you don’t understand what words “biodegradable” and “plastic” mean.
PLA is biodegradable. Just only under industrial conposter conditions so yeah still a problem.
But a plastic is just a chain of polymers, it makes it difficult but not impossible to biodegradability depending on chemical and structure. Almost all plastics don’t but some do