The industry is currently shifting away from traditional media toward functional and sustainable materials:

If you are looking for specific pet-related products that might use durable paper or fiber materials (like heavy-duty cat toys), retailers like Repounce offer items designed for "heavy chewers" that focus on material durability.

The phrase likely refers to a specific stock market classification or a business analysis framework regarding the paper production industry, though it is not a standard industry term. Based on common business descriptors for the sector:

This includes technical papers used in medical diagnostics, filtration, and high-end retail packaging.