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Surface wettability balance is a key basic performance that coordinates paper gluing, coating and composite processing effects. Unbalanced wettability is divided into two extreme defects: excessive wettability leads to rapid water and glue penetration, causing paper softening, deformation and glue overflow; poor wettability results in uneven glue spreading, coating shrinkage, hollow bonding and insufficient composite fastness. In the production of adhesive composite paper, coated paper and kraft glue-sealed packaging paper, unstable wettability directly causes a large number of bonding defective products. Most enterprises simply adjust sizing dosage to change surface wettability, which cannot achieve precise micro-regulation and often causes performance extremes. Excessive sizing reduces surface activity, while insufficient sizing loses water resistance, failing to balance wetting adaptability and waterproof performance. Shandong Ludao Energy Technology Co., Ltd. provides precise paper surface wettability optimization solutions. By micro-adjusting surface molecular hydrophilic and hydrophobic equilibrium, we realize moderate, uniform and controllable surface wettability. The solution meets the uniform spreading and bonding requirements of glue and coating materials, avoids composite hollow and overflow defects, retains basic water resistance of paper, and greatly improves post-composite processing yield and product stability.