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Air permeability balance is a key comprehensive performance that restricts the dual improvement of paper protection performance and processing adaptability. Many paper products have unbalanced air permeability: excessive air permeability leads to poor dust insulation, weak wind resistance and easy moisture penetration, failing to meet packaging protection requirements; insufficient air permeability causes poor ink drying, slow glue penetration, difficult heat dissipation and easy sheet adhesion during processing. Unbalanced air permeability is particularly prominent in food breathable packaging, industrial isolation paper and high-speed printing paper. Most paper mills adjust air permeability by simply changing pressing pressure or sizing dosage, which cannot achieve precise graded control. Excessive compaction will damage fiber toughness, while loose forming will reduce paper strength and surface flatness, failing to balance protection performance and processing performance.Shandong Ludao Energy Technology Co., Ltd. provides precise air permeability balance optimization solutions. By adjusting paper internal micro-pore structure and pore size distribution, we realize moderate, uniform and stable air permeability. The optimized paper maintains qualified isolation and protection ability, ensures smooth ink drying and glue penetration in post-processing, balances protective performance and processing efficiency, and meets the multi-scene application requirements of breathable functional paper.