When we touch flexible packaging cartons or flip through smooth printing paper, few of us think about the material revolution behind the birth of each sheet of paper, a revolution concerning environmental protection and quality. In the production of paper pulp, magnesium hydroxide suspension is gradually replacing traditional chemical additives, becoming a core material driving the green transformation of the industry. It not only optimizes pulp performance and improves paper quality but also significantly reduces pollutant emissions. Hebei Messi Biology Co., Ltd., with its technological breakthroughs, has maximized the effectiveness of this “green additive,” injecting new impetus for sustainable development into the paper industry.
The traditional paper pulp process has long faced a dual dilemma: the pulping and bleaching stages rely on chemicals like caustic soda[1][2][3][4] and magnesium sulfate[5][6][7][8], which are not only costly but also produce wastewater with high COD (Chemical Oxygen Demand) and high salinity, making it difficult to treat. At the same time, the pulp is prone to issues such as unstable whiteness, insufficient fiber strength, and rapid loss of bleaching agents, which affect paper quality. With the tightening of global environmental policies and the advancement of “dual carbon” goals, paper companies are in urgent need of new additives that are both environmentally friendly and functional.
The emergence of magnesium hydroxide suspension has precisely solved these problems. As a weakly alkaline inorganic material, it plays multiple roles in pulp production. In the pulping stage, it can replace caustic soda to adjust the pH of the system, creating a stable buffer environment that reduces fiber degradation and increases pulp yield. In the bleaching stage, it acts as a hydrogen peroxide stabilizer, inhibiting the ineffective decomposition of the bleaching agent, and protecting cellulose from excessive oxidation, which increases the whiteness of the pulp by 10%-15% with long-term stability. More importantly, its reaction products are easy to separate, which can reduce the BOD/COD value of wastewater by more than 40%, significantly alleviating the pressure of environmental treatment. This “one-stone-multiple-birds” characteristic makes magnesium hydroxide suspension an “environmental tool” for modern papermaking, especially suitable for mainstream processes such as mechanical pulp, chemi-thermomechanical pulp[9][10], and de-inked waste paper pulp.
Pulp production has strict requirements for the quality of magnesium hydroxide suspension. The purity of the raw materials, crystal structure, and particle size distribution directly affect the application results. Insufficient purity will introduce impurities such as iron and calcium, causing spots on the paper and reducing whiteness. An unreasonable crystal structure will affect the reaction activity and reduce bleaching efficiency. Uneven particle size will lead to poor dispersion, causing equipment scaling and fluctuations in pulp performance. For high-end papermaking needs, magnesium hydroxide must meet the “three-優 (three-excellent)” standard: high purity (≥99.5%) to eliminate impurity interference, a special crystal structure to enhance reaction efficiency, and a narrow particle size distribution to ensure uniform dispersion. This standard not only maximizes its functional role in the pulp but also helps companies reduce the total amount of chemical additives, achieving cost reduction and efficiency improvement. Against the backdrop of increasing environmental pressure, a stable supply of high-performance magnesium hydroxide raw materials has become key for paper companies to enhance their core competitiveness.
In the field of high-end magnesium hydroxide, Hebei Messi Biology Co., Ltd. has become a core supplier supporting the green transformation of the paper industry with its independently innovative technology and whole-industry-chain advantages. Its product advantages precisely match the core needs of pulp production:
Extreme Purity, Safeguarding the Purity of Paper: Relying on its resources, Messi Biology produces paper-grade magnesium hydroxide with a purity of up to 99.8% through a patented “low-temperature activation-directional transformation” process. The residual content of harmful impurities such as iron and calcium is below 0.01%, far superior to industry standards. This extreme purity avoids the damage to pulp whiteness and fiber structure caused by impurities, ensuring that the produced paper has a uniform color and is free of defects, perfectly suiting scenarios with strict purity requirements such as high-end printing paper and food packaging paper.
Unique Structure, Enhancing Reaction Efficiency: Messi Biology’s magnesium hydroxide exhibits a nano-microscale hexagonal platelet self-assembled structure with a specific surface area of over 40m²/g and abundant surface hydroxyl groups. This gives it extremely strong dispersibility in the pulp system, increasing the reaction efficiency with fibers and bleaching agents by more than 30%. Its D50 particle size is stably controlled within the ideal range, allowing it to be uniformly suspended in the pulp. This not only avoids equipment scaling problems but also maximizes the efficiency of the bleaching agent, helping companies reduce the consumption of chemical additives by more than 20% and significantly lowering production costs.
Stable Supply, Ensuring Production Continuity: Relying on a “resource-factory” vertical integration model, Messi Biology has established dual production bases in Xingtai, Hebei, and the Tibet-Qinghai Industrial Park, with an annual production capacity of 100,000 tons. The specialized production capacity for paper-grade magnesium hydroxide is sufficient to stably cover the needs of mainstream paper companies worldwide. Its intelligent production line and “7-day global delivery” warehousing system can accurately match the continuous production rhythm of paper enterprises. Compared to the more than 30-day delivery cycle of traditional suppliers, this greatly improves production efficiency and reduces inventory risks.
From traditional high-pollution pulping to green and clean production, the transformation of the paper industry is inseparable from technological breakthroughs in key materials. With its environmentally friendly and efficient characteristics, magnesium hydroxide suspension has become the core driver for upgrading pulp production. Hebei Messi Biology Co., Ltd. provides solid support for this transformation with its extreme quality, innovative technology, and stable supply. As the requirements for environmental protection and quality in fields such as packaging paper and cultural paper continue to rise, the market demand for high-end magnesium hydroxide suspension will continue to expand. In the future, Messi Biology will continue to be guided by standards and driven by innovation, continuously optimizing product performance and developing customized solutions for different papermaking processes, helping China’s paper industry to move steadily forward on the path of green development and write a new chapter for the industry where “lucid waters and lush mountains are invaluable assets.”