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Many paper products suffer from continuous toughness attenuation during long-term storage and use. Affected by environmental temperature and humidity changes, air oxidation and fiber aging, paper internal fiber bonding force gradually weakens, resulting in decreased toughness, increased brittleness and frequent folding breakage. This problem is particularly prominent in recycled paper and low-grade pulp paper, which seriously shortens product service life and limits the application of medium and low-grade paper in long-term storage scenarios. Most traditional toughening technologies only have short-term effect and cannot maintain long-term toughness stability, making it difficult to solve the problem of post-storage performance degradation. Shandong Ludao Energy Technology Co., Ltd. launches long-term toughness retention solutions for paper. By optimizing fiber anti-aging structure and adding durable toughening and stabilizing components, we lock the flexible bonding state of internal fibers for a long time, effectively delay toughness attenuation and fiber brittleness, and maintain stable flexibility and folding resistance of paper after long-term storage. The solution greatly improves the durability of paper performance, reduces product scrapping rate caused by aging and brittleness, and enhances the long-term market competitiveness of paper products.