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A Brief Discussion on the Characteristics and Application of Stone Paper-1

Stone paper is a common name or a business name. In essence, it is a film product made of highly filled modified plastics. Stone paper is not traditional vegetable fiber (wood pulp) paper, nor film plastic (synthetic) paper. Instead, it grinds limestone and other minerals into ultra-fine powder (fineness is 800-1250 meshes, dosage is as high as 75%), together with macromolecule resin (such as polyethylene, polypropylene, accounting for about 25%) and other small amounts of assistance, using the characteristics of macromolecule interface chemistry and macromolecule modification. A new type of "paper product" is produced by mixing, extrusion, material making, film making by blow molding or calendering, coating and necessary secondary finishing processes such as paraffin wax, stearic acid, aluminate coupling agent, etc.

Stone paper has appeared in social life as early as the 1980s, and its theoretical basis and production process ideas have already taken shape. It is not a new creation or invention in the 21st century. Previously, Taiwan Plastic King's South Asia company had an annual production capacity of 50,000 tons, and its products included business cards, meal tickets and so on. But at that time, the filling capacity of calcium carbonate was only about 50%. Although its performance and appearance were good, it could not compete with fiber paper in terms of price and use effect, so it had not been developed greatly.

Under the background of energy saving, emission reduction and development of low carbon economy, the filling ratio of calcium carbonate is more than 75%, and the production technology of stone paper is becoming more and more mature. Especially in 2010, the introduction of stone paper at the two sessions has attracted wide attention from all walks of life and has become a hot topic in many media reports.

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