Preface

Under the dual drivers of the global environmental wave and industrial upgrading, Nanjing Sumino Precision Machinery Co., Ltd. remains committed to advancing high-end equipment manufacturing as its core engine, driving disruptive innovation in the field of new materials. Leveraging a self-developed matrix of core equipment—including casting machines, stretching machines, laminating machines, and coating machines—we provide full-chain technical support for the industrial production of stone paper, a revolutionary material, empowering a new future of green intelligent manufacturing.

Industry Innovation ·Environmental Pioneer
The production process of stone paper generates no wastewater, exhaust gases, or waste residue, posing zero pollution to the environment. As a green, eco-friendly paper harmless to humans and animals, it features waterproofing, oil resistance, fold endurance, and light degradability. Suitable for standard printing, its functionality approximates traditional wood pulp paper while serving a vast array of applications.

As a representative of new eco-friendly synthetic paper, stone paper is centered on a scientifically formulated organic-inorganic composite system:
Substrate Innovation: The base layer employs eco-friendly resins such as polylactic acid (PLA) or polypropylene (PP), combined with lightweight calcium carbonate and lithopone in a golden ratio, balancing the flexibility of polymer materials with the structural strength of inorganic minerals.
Process Refinement: A homogeneous raw material system is constructed through thermal drying and dehydration, intensive mixing and kneading, and precision granulation. Subsequent high-temperature extrusion via calendering machines, coupled with corona surface activation technology, ensures efficient bonding between the substrate and coating layers.

Practicing Dual-Carbon Goals · Enabling an Intelligent Future
Stone paper production boasts simplified processes, high investment returns, low energy consumption, and zero reliance on plant fibers or deforestation, preserving natural ecosystems. Free from strong acids, alkalis, bleaching agents, and toxic emissions, it stands as a fully green product.

Universal Printability – Stone Paper
Full-Scenario Coverage:
Breakthrough applications span six major fields—cultural paper, industrial paper, packaging paper, household paper, informational paper, and specialty paper—establishing an eco-friendly "full paper industry chain" solution.

Cultural Creativity:
Applications include premium calendars, art albums, children’s pop-up books, and museum-grade posters.

Commercial Packaging:
Food-safe certified shopping bags, oil-resistant restaurant menus, waterproof cosmetic labels, and foldable gift boxes.

Education & Publishing:
Stone paper-printed textbooks enhance weather resistance for outdoor maps, while its mothproof properties ensure long-term preservation of archival documents.

Core Technologies · Forging Excellence
Our production line features a proprietary substrate composite process, combining polypropylene (organic component) with lightweight calcium carbonate and lithopone (inorganic components) in precise ratios. Through self-developed systems—thermal dehydration units, intensive mixing and kneading units, and precision casting forming equipment—we enable fully automated production from raw material pretreatment to finished product coating. After forming uniform film layers via multi-layer co-extrusion casting, innovative corona surface treatment technology significantly enhances coating adhesion, ensuring exceptional physical performance.

Professional Manufacturing · Sustained Excellence
With 15 years of expertise in equipment manufacturing for stretching, cast film, laminating, and coating systems, Nanjing Sumino Precision Machinery Co., Ltd. has built a device ecosystem and full-industry-chain matrix serving high-tech fields such as new energy, healthcare, and industrial packaging:

TPU hot melt adhesive film production lines

CPP/CPE cast film production lines

EVA photovoltaic encapsulation film systems

PE breathable film complete equipment

PVDF specialty film production lines

Medical purification film intelligent manufacturing systems

3D embossed film production lines

Multi-layer barrier film systems

LLDPE stretch film production lines

We steadfastly uphold the philosophy of "material innovation driving industrial upgrading," offering global clients end-to-end services—from equipment selection to process optimization—through continuous technological iteration and innovation.

Conclusion
From mineral ore to eco-friendly paper rolls, from the meshing of precision gears to the synergy of intelligent systems, Nanjing Sumino Precision Machinery Co., Ltd. remains dedicated to its mission: "Making manufacturing more efficient, materials greener." With cutting-edge equipment as our pen and technological innovation as our ink, we collaborate with global partners to script a sustainable future for industry.

Technical Consultation Hotline: +86-025-5183 9686
VIP Consultation Hotline: 189 1445 1617
Official Website Access (1): www.suminojp.com
Official Website Access (2): www.susumino.com
Address: 116 Suyuan Avenue, Jiangning District, Nanjing, Jiangsu Province, China