Introduction
WEINAN SANLI PRINTING MACHINERY CO.,LTD. (渭南三立印刷机械有限公司) is a Chinese manufacturer of printing and packaging machinery headquartered in Weinan, Shaanxi, China. Founded in 1993, the company focuses on equipment used in flexible packaging and related converting processes, including gravure printing machines, laminating machines, slitting machines, and inspection rewinding machines.
Within the plastics and flexible-packaging ecosystem, Sanli occupies the role of a process-equipment supplier serving printers, film processors, and packaging manufacturers that convert plastic films and other substrates into finished packaging materials. Its product range and patent activity indicate a technical emphasis on electronically shafted gravure presses, solventless and dry laminating systems, and high-speed web handling and inspection equipment.
The company presents itself as a manufacturer with a long operating history, an industrial site in the Weinan economic development area, and export activity in multiple overseas markets. Public listings also associate Sanli with ISO 9001 management certification, recognition as a high-tech enterprise, and repeated inclusion in Chinese technology-oriented small and medium-sized enterprise lists.
History and Development
Sanli was established in 1993 in Weinan, Shaanxi, and later developed into a specialist manufacturer of printing and packaging machinery. Company materials describe its growth as being supported by accumulated production experience and the adoption of foreign technologies and customer feedback in product development.
A notable milestone in the company’s development was its 2013 cooperation with Japan’s Sumitomo Heavy Industries on electronically shafted printing machinery, which company and exhibition materials describe as a step toward internationally advanced equipment. This collaboration is significant because electronically shafted presses are typically associated with tighter registration control, coordinated drive systems, and improved process stability in high-speed gravure printing.
Another development milestone was the company’s reported 2020 environmental technology work, described in exhibition-related material as an independently developed air reduction and concentration enhancement technology. In the context of printing and converting machinery, such developments are relevant to emissions management and process efficiency, especially where solvent use and drying systems are involved.
Sanli’s later public recognition includes its appearance on lists of technology-oriented small and medium-sized enterprises in Shaanxi in 2022, 2023, and 2025, and its inclusion in a 2025 list of recognized high-tech enterprises in the province. These listings suggest sustained technical activity and continued regional recognition in industrial equipment manufacturing.
Business Operations and Segments
Sanli operates as a manufacturer rather than a trading intermediary. Company listings place it in the flexible packaging equipment category and identify its main customer groups as printing plants, plastics factories, and film factories.
Its commercial footprint is described as spanning domestic and overseas markets, with listed markets including mainland China, Hong Kong and Taiwan, South America, Southeast Asia, and Africa. Another company profile describes operations in more than ten countries, including South Korea, Thailand, and Indonesia.
The company’s reported scale is mid-sized by industrial equipment standards, with a site area of 38,000 square meters, a building area of 12,000 square meters, about 51–100 employees, and annual revenue listed in the range of RMB 20 million to RMB 50 million.
Products and Technologies
Sanli’s main product lines include:
- Electronically shafted gravure printing machines
- Mechanically shafted gravure printing machines
- Solventless laminating machines
- Dry laminating machines
- High-speed slitting machines
- Inspection rewinding machines
The company’s technical positioning centers on machinery used in the converting of plastic films and other roll materials into printed and laminated packaging webs. Gravure printing machines are typically used for long-run, high-quality image reproduction on flexible packaging substrates, while laminating machines bond layers such as film, foil, and paper for barrier, sealability, or structural performance.
Patent-related records associated with the company indicate additional technical work in areas such as multi-process composite lamination, solventless composite methods, and drying systems. These filings suggest attention to process integration, coating and adhesive control, and thermal-air management in web-processing lines.
A product listing on the company site also references specific models such as STC-1300 slitting machines, SA-200 dry laminating machines, SX-150 dry laminating machines, SD-300 electronically shafted printing machines, and SFJ-1300 inspection rewinding machines. Such model naming indicates a portfolio organized around web width, line configuration, and process function.
Applications and End Markets
Sanli’s equipment is used in industries that convert flexible webs into finished packaging materials, especially:
- Flexible packaging
- Plastic film processing
- Printing and converting
- Composite packaging manufacture
The company’s stated customer base includes color printing plants, plastics factories, and film factories. In practical terms, that places its machinery in upstream and midstream packaging manufacturing, where gravure printing, lamination, slitting, and inspection are critical steps before final pouch, bag, or rollstock production.
Global Presence and Market Position
Sanli is headquartered in Weinan, Shaanxi Province, with company listings placing it in the city’s economic development area or Weibei industrial area. Its market presence extends beyond China, with public materials describing export and business activity in multiple regions, including Southeast Asia, South America, Africa, and neighboring Asian markets.
Within the plastics-related machinery sector, the company is positioned as a specialized regional manufacturer rather than a diversified conglomerate. Its profile is typical of Chinese equipment suppliers that compete through customization, application-specific engineering, and cost-performance balance in flexible packaging machinery.
Sanli’s appearance in industry exhibition and network listings, including CPRJ/Adsale-related directories and China Plastics Online exhibitor information, reflects its participation in the broader plastics and packaging machinery market.
Research and Development
Company and exhibition materials emphasize a development model built on absorbing foreign advanced technology and adapting products to customer production experience. This approach is consistent with machinery suppliers that refine line stability, registration accuracy, web handling, and energy efficiency through iterative engineering.
Patent records associated with Sanli indicate work in fields including solventless laminating, multi-layer composite machinery, drying systems, and oxidation-related equipment design. In the packaging machinery context, such filings indicate attention to productivity, adhesive performance, drying uniformity, and process integration.
Sustainability and Environmental Initiatives
Sanli’s sustainability profile is most clearly reflected in its association with solventless laminating machinery and an independently developed air reduction and concentration enhancement technology reported in 2020. Solventless lamination is relevant to packaging manufacturers because it can reduce solvent-related emissions compared with solvent-based systems, depending on the application and operating conditions.
Its product range also includes process equipment that can support material efficiency through better web control and lower waste, such as inspection rewinders and slitting machines. These systems are important for quality control and can reduce scrap by identifying defects earlier in the converting process.
Financial Performance and Economic Impact
Public company listings describe Sanli as having fixed assets of about RMB 30 million and annual output value of about RMB 60 million in one corporate profile. Another listing gives annual revenue in the range of RMB 20 million to RMB 50 million. These figures place the company in the category of a modestly sized industrial equipment manufacturer with regional manufacturing significance.
The company’s economic impact is tied to the support it provides for downstream flexible packaging production, a sector that depends on specialized machinery for printing, lamination, slitting, and inspection. Its technology development, export activity, and employment base also contribute to the industrial economy of Weinan and Shaanxi.
Quality Management and Certifications
Sanli is listed with ISO 9001 management certification in company directory material. It is also associated with provincial recognition as a high-tech enterprise and repeated inclusion in technology-oriented SME lists in Shaanxi.
These qualifications are relevant in machinery manufacturing because they indicate formalized quality management and a recognized technical development profile, both of which are important for customers purchasing production-critical equipment.
Innovations and Future Outlook
Sanli’s recent trajectory suggests continued emphasis on process automation, multi-functional web converting equipment, and environmentally improved laminating systems. Its product portfolio and patent activity indicate that future competitiveness is likely to depend on tighter process control, energy efficiency, emissions management, and customization for flexible packaging applications.
In the broader plastics machinery market, these priorities align with industry demand for equipment that can handle lighter-weight films, higher line speeds, improved defect control, and lower environmental impact. Sanli’s specialization in printing and converting machinery places it at the intersection of packaging modernization, regulatory pressure on emissions, and the ongoing shift toward more technically demanding flexible-packaging formats.
References
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CPS+ eMarketplace. (n.d.). WEINAN SANLI PRINTING MACHINERY CO.,LTD.WEINAN SANLI PRINTING MACHINERY CO.,LTD.. CPS+ eMarketplace. https://www.chinaplasonline.com/eMarketplace/ExhibitorInfo?CompId=1028030Link