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Laminating fastness is a key quality index for composite packaging paper, gift packaging paper and waterproof coated paper. In the post-processing laminating process, many paper products suffer from common defects such as weak lamination, edge warping and delamination, bubble generation and film peeling. These problems are mainly caused by poor paper surface activity, uneven surface sizing, residual dust and unstable surface tension. Insufficient laminating fastness leads to separation between film and paper substrate during folding, extrusion and long-term storage, seriously damaging finished packaging appearance and protective performance. For waterproof and oil-proof composite paper, poor lamination tightness will cause liquid penetration from delamination gaps, completely losing functional protection effect. Most enterprises improve laminating effect by increasing adhesive dosage and pressing temperature, which increases processing cost, easily causes paper deformation and does not solve the fundamental surface matching problem.Shandong Ludao Energy Technology Co., Ltd. launches professional paper laminating fastness optimization solutions. By activating paper surface molecular activity, homogenizing surface tension and eliminating micro impurities, we greatly improve the bonding matching degree between paper substrate and laminating film. The solution realizes tight, bubble-free and long-term stable lamination effect, avoids delamination and peeling defects, maintains intact packaging structure and functions, and improves the durability and grade of composite paper products.