Stone paper, also known as rock paper, mineral paper, rich mineral paper, or paper from waste marble, is a paper-like material manufactured primarily from calcium carbonate combined with a polymer binder such as high-density polyethylene (HDPE). Unlike conventional paper, which relies on plant fibers and substantial water consumption, stone paper uses mineral-based raw materials and does not require wood pulp in its production process.
The material is produced by converting finely ground limestone or other calcium-carbonate-rich mineral resources into powder or masterbatch and processing it with polymeric materials through extrusion and related forming technologies. Stone paper is recognized for properties including water and moisture resistance, tear resistance, durability, UV resistance, and suitability for writing, printing, packaging, labels, bags, and other applications.
The technology was first developed by Lung Meng Tech Co. of Taiwan during the late 1990s and has subsequently been marketed under various trade names. The report describes stone paper as an environmentally oriented alternative to conventional paper and certain plastic products, emphasizing reduced water use, the absence of wood pulp, and reduced use of conventional bleaching and paper-making chemicals.
The global stone paper market is expected to grow at a CAGR of 2.6% during 2021-2026. The report proposes a feasibility study for establishing a greenfield Stone Paper production facility with an installed capacity of 5000 Tons / Year.
| Particulars | Value |
|---|---|
| Plant Capacity | 17 Ton/Day |
| Land & Building (8755 sq.mt.) | US$ 11.66 Lac |
| Plant & Machinery | US$ 31.88 Lac |
| Working Capital for 3 Months | US$ 9.96 Lac |
| Total Capital Investment | US$ 55.48 Lac |
| Rate of Return | 19% |
| Break Even Point | 69% |
Stone paper is a paper-like material made primarily from calcium carbonate combined with a polymer binder such as HDPE.
Unlike conventional paper, its principal mineral raw material can be obtained from limestone and other calcium-carbonate-rich sources rather than plant fibers. The material is processed using polymer-based technologies, including extrusion and film-forming processes. Depending on its formulation and conversion method, stone paper can be manufactured for stationery, printing, packaging, labels, bags, wallpaper, trays, containers, and other applications where durability and moisture resistance are required.
Stone paper is manufactured by processing finely ground calcium carbonate with polymeric materials through specialized forming equipment.
The report describes stages including grinding the mineral powder, pelletizing or masterbatch preparation, extrusion, blown-film or casting operations, coating where required, and cutting and finishing. The precise process sequence depends on the intended product and formulation. This manufacturing approach differs from conventional paper-making because it does not rely on wood pulp and is designed around mineral powder and polymer processing technologies.
The principal raw material used in stone paper is calcium carbonate, typically obtained from limestone or other mineral sources, combined with a polymer such as polyethylene.
The report describes formulations containing substantial proportions of finely ground calcium carbonate together with polymeric materials and additives. One formulation cited in the report uses 85% 1500-2500 meshes super fine powder of calcium carbonate from limestone and 15% additive for masterbatch production. Other formulations described in the report use different proportions, demonstrating that composition can vary according to the manufacturing technology and end product.
Stone paper offers durability, moisture resistance, tear resistance, and reduced reliance on wood pulp compared with conventional paper.
The report identifies properties such as water and moisture resistance, UV resistance, tear resistance, anti-oil performance, resistance to cracking and corrosion, and suitability for clear-color printing. It also states that the production process does not use plant fibers and does not require the same water-intensive paper-making approach. These characteristics make stone paper relevant to applications where conventional paper may have limitations, particularly packaging, labels, outdoor materials, and products exposed to moisture.
Stone paper can be converted into a broad range of stationery, printing, packaging, labeling, and specialty products.
Applications identified in the report include office and commercial paper, leaflets, posters, books, magazines, bags, packaging, wallpaper, adhesives, tags, in-mould labels, plates, trays, and containers. It also describes specialty applications such as fieldwork paper, underwater operations paper, underground mining operations paper, and certain military uses. The material's resistance to moisture and tearing can be particularly useful in demanding environments.
Stone paper can be recycled, although its recyclability depends on the specific formulation and applicable recycling system.
The report describes stone paper as recyclable and also discusses photo-degradation under direct UV exposure. Because stone paper combines calcium carbonate with polymeric materials, its end-of-life handling differs from conventional fiber-based paper. Industrial recycling practices should therefore consider the composition, additives, coatings, and available processing infrastructure of the specific stone-paper product.
A stone paper production line can include mineral grinding, granulation or pelletizing, extrusion, film-forming, coating, rolling, cutting, and finishing equipment.
The report specifically identifies granulation machines, extruders, blowing machines, casting machines, rolling machines, and coating machines. It also refers to a corona system, edge cutting, and winder equipment. The final equipment configuration depends on the selected formulation, product dimensions, production route, surface treatment requirements, and desired output characteristics.
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