Stone paper is a popular name in the society or a commercial name, which is essentially a film product made of highly filled modified plastic materials. Stone paper is not a traditional plant fiber (wood pulp) paper, nor is it a thin-film plastic (synthetic) paper. Instead, it uses the characteristics of polymer interface chemistry and polymer modification to grind limestone and other minerals into ultra-fine particles. Powder (the fineness is 800-1250 meshes, the dosage is as high as 75%), plus polymer resin (such as polyethylene, polypropylene, accounting for about 25%) and other small amounts of additives (such as paraffin, stearic acid, aluminate) Ester coupling agent, etc.) A new type of "paper product" made by the processes of mixing, extrusion, material making, film blowing or calendering, coating, and necessary secondary coating.
Stone paper began to appear in social life as early as the 1980s, and its theoretical basis and production process ideas have long been formed, and it is not a new initiative or new invention in the 21st century. At that time, the Nanya Company under the King of Formosa Plastics had an annual production capacity of 50,000 tons, and its products included "tear-proof" business cards and meal tickets. But at that time, the filling amount of calcium carbonate was only about 50%. Although the performance and appearance were good, it could not compete with fiber paper in terms of price or use effect, so it has not been greatly developed.
In the context of energy conservation, emission reduction and the development of a low-carbon economy, with the calcium carbonate filling ratio reaching more than 75%, the production technology of stone paper is becoming more mature. In particular, it was launched and used at the two sessions in 2010, which attracted widespread attention from all walks of life and became a hot topic in many media reports. However, with the poor management and closure of several stone paper manufacturing enterprises, the momentum of stone paper has been weak in recent years. However, in terms of the characteristics of stone paper, what is its development prospect? Next, the development prospects of stone paper are discussed from the characteristics, scope of application, energy saving and emission reduction, and sustainable development of stone paper.
