PlasWiki
Company›WEIHAI LIANQIAO NEW MATERIAL SCIENCE & TEC

WEIHAI LIANQIAO NEW MATERIAL SCIENCE & TEC

Weihai Lianqiao specializes in modified polymer materials with a focus on heat-resistant silane-crosslinked polyethylene (PEX-b) for oil and gas pipelines and other demanding uses, alongside medical packaging, engineering plastics, and precision products, supporting import substitution and certified high-performance applications in industrial and healthcare markets.

1 views0 mentionsUpdated October 16, 2026

Introduction

Weihai Lianqiao New Material Science & Technology Co., Ltd. is a Chinese high-tech plastics materials company headquartered in Weihai, Shandong, that specializes in the research, manufacture, and sale of modified polymer materials, medical consumables, and pharmaceutical packaging materials. Founded in January 2005 and listed on the National Equities Exchange and Quotations (NEEQ) in July 2014, the company has developed a business centered on silane-crosslinked polyethylene (PEX-b), modified engineering plastics, color masterbatch, and related precision products.

Within the plastics industry, Lianqiao is notable for its work on heat-resistant crosslinked polyethylene for demanding applications such as oil and gas transportation, along with materials used in medical packaging, electronics, automotive, home appliances, and HVAC piping. Chinese government and company materials describe it as one of the country’s larger producers of heat-resistant silane-crosslinked polyethylene (PEX-b) and as a specialized enterprise with significant capabilities in import substitution for certain high-performance pipe-material applications.

History and Development

Lianqiao was established in 2005 in Weihai, Shandong, with an initial focus on modified polymer materials and related plastic products. The company later completed a corporate restructuring and was listed on the NEEQ in 2014, which marked a formal step in its development as a specialized materials manufacturer.

Several milestones have shaped its development:

  • In the mid-2010s, the company expanded its industrial profile beyond modified plastics into medical materials and precision die-cut products, building a broader product portfolio around high-performance polymer applications.
  • Industry and local-government materials indicate that Lianqiao developed a domestically produced PEX-b material for oil and gas pipeline use that helped replace imported alternatives in a technically sensitive segment.
  • By the 2020s, the company had accumulated multiple honors and management-system certifications, including recognition as a national “little giant” enterprise, alongside quality, environmental, and occupational-health certifications that support industrial and medical-materials production.

Business Operations and Segments

Lianqiao’s business is organized around two principal areas: advanced polymer materials and precision die-cut / related downstream products. Its materials business focuses on engineered polymer formulations, while its product lines extend into application-specific materials for industrial and healthcare markets.

The company’s reported core activities include:

  • Modified polymer materials
  • Heat-resistant silane-crosslinked polyethylene (PEX-b)
  • Engineering plastics and functional masterbatch
  • Medical plastics and packaging materials
  • Precision die-cut products and related processed materials

Company and market listings also associate Lianqiao with production processes such as blow molding, spraying, injection molding, and extrusion, indicating a manufacturing model that combines compounding, material modification, and plastic processing capabilities.

Products and Technologies

Lianqiao’s product portfolio is centered on modified polymer materials with performance characteristics tailored to demanding end uses. Its best-known product class is silane-crosslinked polyethylene (PEX-b), a material designed for improved heat resistance, corrosion resistance, and durability in pipe and transport systems.

Key product and technology areas include:

  • PEX-b raw materials and related pipe applications, used in oil and gas transportation, underfloor heating, and other piping systems.
  • Modified engineering plastics, used in vehicles, home appliances, building materials, electronics, and communications applications.
  • Medical-grade materials and medical packaging products, including resins and packaging films for healthcare-related uses.
  • Color masterbatch and functional additives, supporting coloration and performance tuning in polymer processing.
  • Precision die-cut products, which extend the company’s portfolio into processed materials for industrial and medical applications.

Technical descriptions from company and local-government sources emphasize that its crosslinked polyethylene products are intended to perform under elevated temperature and corrosive conditions, particularly in oil, gas, and water transport systems. The company also reports intellectual-property activity and multiple invention-related certificates, suggesting a continued emphasis on formulation and process development.

Applications and End Markets

Lianqiao serves a diversified set of end markets, with a strong concentration in industrial materials and medical packaging.

Major application areas include:

  • Oil and gas transportation, including pipelines, liners, and related infrastructure materials.
  • HVAC and heating systems, especially pipe applications associated with crosslinked polyethylene.
  • Automotive and home appliances, where modified plastics are used for molded and functional components.
  • Building and construction materials, including polymer products for piping and building-related applications.
  • Medical packaging and medical consumables, where material performance, consistency, and compliance are important.
  • Electronics and electrical appliances, which require polymers with controlled mechanical and processing properties.

Local-government reporting states that the company’s domestically developed oil-and-gas pipeline material has been used for oil extraction, oil transmission, gas transmission, and water-injection pipelines, indicating a substantial role in industrial infrastructure supply chains.

Global Presence and Market Position

Lianqiao is headquartered in Weihai, Shandong, and operates at least two manufacturing bases, including the Lianqiao New Material Science and Technology Industrial Park and the Tianjin Road Industrial Park. The company’s marketing operations are oriented toward China’s Yangtze River Delta and Pearl River Delta regions, while also extending to overseas markets including Japan, South Korea, the Middle East, Europe, and the United States.

In domestic industry reporting, Lianqiao has been described as a major player in the niche of heat-resistant crosslinked polyethylene, with a reported domestic market share above 85% for a key oil-and-gas pipeline raw material segment. Company materials also identify it as one of China’s larger producers in the PEX-b category.

Research and Development

Research and development is central to the company’s positioning. Lianqiao states that it holds multiple invention patents and has established several R&D and technology platforms, including a Shandong Engineering Laboratory, a Shandong Enterprise Technology Center, and a Shandong “One Enterprise and One Technology” R&D Center.

The company’s technical work has focused on:

  • Crosslinked polyethylene formulations for high-temperature transport applications
  • Modified engineering plastics for industrial and consumer uses
  • Medical materials with controlled performance characteristics
  • Process optimization for compounding, die-cutting, and downstream plastic processing

Regional reporting has highlighted the company’s effort to overcome technical bottlenecks in the domestic production of pipe materials that were previously dominated by foreign suppliers. That emphasis on import substitution remains a defining feature of its R&D profile.

Quality Management and Certifications

Lianqiao reports a substantial certification and management-system portfolio, including ISO 9001, ISO 14001, QC080000, IATF 16949, ISO 45001, enterprise intellectual-property management certification, and informatization-industry integration management certification. These systems are relevant to its mix of industrial polymer materials, automotive-adjacent products, and medical-material applications.

Local-government materials also report that the company has received recognition associated with green manufacturing, including a green factory designation and a green supply chain management enterprise listing in Shandong and Weihai-level industrial programs.

Sustainability and Environmental Initiatives

Sustainability claims around Lianqiao are tied mainly to manufacturing efficiency, quality control, and the industrial value of its pipeline materials. Government reporting on the company’s crosslinked polyethylene for oil and gas transport notes that domestic substitution for imported materials can reduce losses associated with pipeline leakage and improve the reliability of industrial transport systems.

The company has also been associated with green factory and green supply chain recognition, indicating participation in regional initiatives for cleaner manufacturing and more responsible industrial production.

Financial Performance and Economic Impact

Lianqiao is a NEEQ-listed company with registered capital reported at RMB 52.8 million in local-government materials. The company had roughly 235–265 employees in the sources reviewed, indicating a mid-sized specialized manufacturing operation rather than a mass-market plastics producer.

Its economic role is most visible in three areas:

  • Import substitution in high-performance pipeline materials
  • Supply of specialty polymer materials to medical and industrial customers
  • Participation in the advanced materials segment of China’s plastics sector, which supports downstream manufacturing and infrastructure development.

Innovation and Future Outlook

Lianqiao’s future prospects are tied to the continued expansion of high-performance polymers, medical materials, and specialized industrial applications. Its combination of material modification expertise, crosslinked polyethylene production, and downstream processing places it in a segment of the plastics industry where product qualification, technical reliability, and customer-specific formulation are more important than commodity scale.

The company’s established manufacturing bases, certification footprint, and overseas market reach suggest a strategy focused on specialization, quality-based differentiation, and continued development of advanced polymer applications for industrial and healthcare uses.

Summary

Weihai Lianqiao New Material Science & Technology Co., Ltd. is a specialized Chinese plastics materials company built around modified polymers, PEX-b crosslinked polyethylene, and medical and industrial polymer products. Its development reflects broader trends in the plastics industry: technical substitution for imported materials, the rise of high-performance engineering plastics, and the growing importance of certified, application-specific materials in infrastructure and healthcare supply chains.

References

  • •

    CPS+ eMarketplace. (n.d.). WEIHAI LIANQIAO NEW MATERIAL SCIENCE & TECWEIHAI LIANQIAO NEW MATERIAL SCIENCE & TEC. CPS+ eMarketplace. https://www.chinaplasonline.com/eMarketplace/ExhibitorInfo?CompId=1001755Link