The majority of food packaging that has to prevent 'grease bleed' is cover through a printing process to coat the material. The industry refers to this chemical as ink because of how it's applied.
The package that has the highest amount that I'm aware of is microwavable popcorn packages. Of course if you used this you would probably recycle the package and then this innocent move pollutes the downstream products.
The only other grease barrier would be in the wax mixtures but their use ends in the 125df range.
The company I've been very involved with in Az is dealing with this head on. They're in a spac deal right now.
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