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 rather than plant fibers. Calcium carbonate can be sourced from stone, limestone, waste rock, marble, and tiles, and is combined with a non-toxic, recyclable high-density polyethylene (HDPE) binder.
Stone paper is designed to provide strength, durability, water resistance, ultraviolet (UV) resistance, and high tear strength. It can be used for products such as posters, leaflets, bags, agricultural labels, coatings, and other printed applications. Some formulations contain approximately 80% limestone and 20% recycled polyethylene.
Unlike conventional paper production based on wood pulp, stone paper manufacturing does not rely on plant fibers. The technology described in the report emphasizes reduced water and energy consumption and the avoidance of chlorine and acid compounds. The resulting material is described as non-toxic and suitable for food-related applications. The report also covers stone paper types, raw materials, properties, applications, manufacturing technologies, environmental comparisons, processing equipment, formulation, product specifications, market developments, and suppliers.
| Particulars | Value |
|---|---|
| Plant Capacity | 7.00 MT/Day |
| Land & Building (3000 sq.mt.) | Rs. 3.95 Cr |
| Plant & Machinery | Rs. 14.17 Cr |
| Working Capital for 2 Month | Rs. 1.29 Cr |
| Total Capital Investment | Rs. 19.76 Cr |
| Rate of Return | 19% |
| Break Even Point | 62% |
Stone paper is a paper-like material made primarily from calcium carbonate and a polymer binder such as high-density polyethylene (HDPE). Unlike conventional paper, its main mineral content does not come from wood pulp or plant fibers. Calcium carbonate can be obtained from limestone, stone, marble, waste rock, and tiles, then processed into powder and combined with the binder. The resulting material is designed to provide strength, durability, water resistance, UV resistance, and high tear strength for a range of printing and packaging-related applications.
The principal raw materials used for stone paper are calcium carbonate and high-density polyethylene (HDPE). Calcium carbonate generally forms the mineral component and may be sourced from limestone, stone, marble, waste rock, or tiles. HDPE acts as the binder and helps provide the required mechanical properties. Depending on the specific formulation and product grade, additional processing materials or coatings may also be used. The exact composition should be selected according to the intended product specifications and manufacturing process.
Stone paper is manufactured by processing calcium carbonate into a fine powder, combining it with a polymer binder, and converting the formulation into a paper-like sheet. The report describes several processing stages, including grinding, pelletizing, extrusion, casting, coating, rolling, stretching, cutting, and finishing. Production-line configurations can include extruders, screen changers, corona systems, edge cutting equipment, winders, and coating systems. The specific sequence and equipment configuration depend on the required stone paper type, thickness, finish, and end application.
Stone paper can be used for a variety of printed, labeling, packaging, and specialty paper applications. The report identifies products such as posters, leaflets, bags, agricultural labels, and coatings. Its resistance to water and tearing can make it useful where conventional paper may have limitations, including applications exposed to moisture. Depending on the grade and formulation, stone paper may also be processed into products requiring particular surface, printing, durability, or dimensional characteristics.
Stone paper offers several technical benefits, including strength, durability, water resistance, UV resistance, and high tear strength. One notable characteristic described in the report is its ability to remain writable when wet. Because its mineral content replaces conventional wood-pulp-based paper fibers, it also has different material and processing characteristics. These properties can make stone paper suitable for demanding printing, labeling, coating, and packaging applications where resistance to moisture and physical damage is important.
Stone paper is presented in the report as an environmentally oriented alternative to conventional paper because it does not use wood pulp as its principal raw material. The described technology emphasizes calcium carbonate-based formulations and avoids chlorine and acid compounds in the stated production approach. The report also discusses water consumption, production waste, greenhouse gas emissions, and other environmental aspects. Actual environmental performance depends on raw-material sourcing, energy requirements, polymer content, manufacturing technology, recycling practices, and end-of-life management.
A stone paper production line can include equipment for raw-material grinding, pelletizing, extrusion, casting, coating, stretching, cutting, and winding. The report specifically discusses a 130/38 high torque single screw extruder, screen changer, corona system, edge cutting and winder equipment, as well as coating and processing systems. Equipment selection depends on the formulation, production method, product dimensions, required output characteristics, and degree of finishing. Proper integration of material handling and processing equipment is essential for consistent product quality.
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