NINGBO DELILONG NEW MATERIAL TECHNOLOGY CO., LTD.

Introduction

Ningbo Delilong New Material Technology Co., Ltd. (Chinese: 宁波德立隆新材料科技有限公司), formerly known as Ningbo Delong Nylon Technology Co., Ltd., is a Chinese manufacturer of modified polymer materials headquartered in Ningbo, Zhejiang Province. Established in 2007, the company develops and produces engineering plastics, specialty polymer compounds, and post-consumer recycled (PCR) materials for industrial customers.

The company’s activities occupy the compounding and performance-enhancement segment of the plastics value chain. Rather than producing commodity polymers from petrochemical feedstocks, Delilong modifies thermoplastics through the incorporation of reinforcing fibers, impact modifiers, flame retardants, stabilizers, fillers, and other functional additives. Its stated product capabilities include reinforcement, toughening, flame retardancy, wear resistance, aging resistance, antistatic performance, hydrolysis resistance, oil resistance, and thermal conductivity.

Delilong reports three production bases—two in Ningbo and one in Hefei—with an aggregate modified-plastics capacity of approximately 150,000 tonnes per year and more than 80 high-torque twin-screw production lines. Its customer industries include automotive manufacturing, aerospace, new energy, rail transportation, and intelligent equipment. The company is listed by CHINAPLAS as a “Specialized, Precise, Special and New” enterprise, a designation used in China for qualified small and medium-sized firms with specialized products, technical capabilities, and growth potential.

History and Development

• 2007: The business was established in Ningbo under its former nylon-technology name, initially focusing on polymer modification and nylon-related materials.
• Expansion of production infrastructure: The company subsequently developed a second Ningbo production base and a facility in Hefei, Anhui Province, creating a multi-site manufacturing network.
• Broadening of material portfolio: Its activities expanded from nylon-oriented products to a wider range of modified new materials, specialty engineering plastics, and PCR high-performance environmental materials.
• Development of service coverage: Delilong established more than 20 sales and service locations, with coverage concentrated in the Yangtze River Delta and Pearl River Delta manufacturing regions.

This progression reflects a wider development pattern in China’s plastics industry, in which compounders have moved from supplying standard reinforced materials toward application-specific formulations for transportation, electrification, energy systems, and advanced equipment.

Business Operations and Segments

Delilong operates primarily as a polymer compounder and materials solution provider. Its business can be considered in three principal areas:

The company’s production model depends on formulation design, raw-material selection, compounding, pelletizing, quality control, and technical support. Its service network is intended to shorten communication and development cycles between the compounder and injection-molding or other plastics-processing customers.

Products and Technologies

Modified Polymer Compounds

The company produces modified thermoplastics designed for specific performance targets rather than general-purpose use. Typical modification routes include:

• Glass-fiber or mineral reinforcement for increased stiffness and dimensional stability.
• Impact modification for improved toughness and resistance to sudden loading.
• Flame-retardant formulations for applications subject to fire-safety requirements.
• Wear-resistant compounds for moving, sliding, or contact components.
• Stabilized grades with improved resistance to heat, ultraviolet exposure, or long-term aging.
• Antistatic and electrically functional materials.
• Hydrolysis-resistant grades for humid or water-exposed environments.
• Oil-resistant compounds for automotive and mechanical applications.
• Thermally conductive formulations for heat-management components.

Engineering Plastics

Engineering-plastic compounds are generally selected where ordinary commodity plastics cannot meet requirements for mechanical strength, temperature resistance, chemical durability, or dimensional control. Delilong identifies specialty engineering plastics as a core product category, although the available company information does not provide a complete public grade-by-grade catalogue.

The performance of such compounds depends on polymer type, reinforcement level, additive package, processing conditions, and end-use geometry. In practice, these materials are commonly converted through injection molding, with processing windows determined by melt flow, moisture sensitivity, mold design, fiber orientation, and required surface quality.

Production Equipment and Processing

Delilong reports more than 80 high-torque twin-screw production lines. Twin-screw extrusion is widely used for polymer compounding because it permits controlled feeding, melting, distributive and dispersive mixing, additive incorporation, devolatilization, and strand or underwater pelletizing in a continuous process.

High-torque equipment is particularly relevant to formulations containing substantial levels of glass fiber, mineral filler, flame retardant, or other additives that increase mixing and conveying demands. The final properties of the compound depend not only on equipment capacity but also on formulation control, residence time, temperature profile, screw configuration, feeding accuracy, and pellet quality.

Applications and End Markets

Delilong states that it serves customers in several technically demanding sectors:

• Automotive: Structural and semi-structural components, under-hood parts, interior and exterior components, electrical housings, and functional fittings.
• Aerospace: Lightweight and performance-oriented polymer components where mechanical and environmental resistance are important.
• New energy: Components associated with batteries, electric vehicles, charging systems, power electronics, and energy equipment.
• Rail transportation: Interior, electrical, and mechanical parts requiring durability and, in some cases, controlled flame performance.
• Intelligent equipment: Housings, mechanical components, electrical parts, and automation-related equipment.

These markets are influenced by several common requirements: weight reduction, component integration, resistance to heat and chemicals, electrical safety, dimensional stability, and regulatory compliance. The shift toward electric vehicles and electrified industrial systems also increases demand for materials with controlled electrical behavior, flame resistance, thermal management, and resistance to demanding operating environments.

Global Presence and Market Position

The company’s manufacturing bases are located in eastern and central China, while its commercial service network is concentrated in major plastics-processing and manufacturing clusters in the Yangtze River Delta and Pearl River Delta. These regions provide access to automotive, electronics, machinery, new-energy, and contract-manufacturing supply chains.

Delilong’s market position is associated with customized polymer compounding, relatively broad formulation capabilities, and proximity to industrial customers. Its reported capacity of approximately 150,000 tonnes per year places the company within the substantial Chinese modified-plastics manufacturing sector, although the available information does not establish a specific national or international market share.

Its competitive environment includes independent Chinese compounders, polymer producers with downstream compounding operations, and multinational specialty-materials suppliers. Competition in this segment is shaped by:

• Consistency between production batches.
• Technical support during molding and application development.
• Compliance with automotive and industrial customer requirements.
• Ability to formulate recycled-content and lower-impact materials.
• Supply reliability and responsiveness to changing resin and additive costs.
• Capacity to develop grades for electrification and lightweighting.

Research and Development

Research and development at a polymer compounder typically connects formulation chemistry with processing engineering and customer application requirements. Delilong’s stated range of functional properties indicates development work across mechanical reinforcement, impact modification, flame retardancy, wear resistance, electrical behavior, chemical resistance, and thermal conductivity.

Application-oriented development may involve:

• Selecting compatible base polymers and additive systems.
• Balancing stiffness, toughness, flowability, and surface appearance.
• Controlling fiber length and dispersion during twin-screw compounding.
• Adjusting moisture sensitivity and hydrolysis resistance.
• Developing recycled-content materials that meet defined performance targets.
• Supporting mold trials, part testing, and processing optimization.

For customers in automotive, new-energy, rail, and intelligent-equipment markets, material development is increasingly linked to component design. A compounder may therefore contribute not only pellets but also material selection, processing recommendations, failure analysis, and substitution of conventional metals or higher-cost polymers.

Sustainability and Environmental Initiatives

The company identifies PCR high-performance environmental materials as one of its product categories. These materials are relevant to the plastics industry’s transition toward greater recycled content and more circular material flows. Their technical challenge is to preserve predictable mechanical, thermal, and processing performance despite variability in recovered feedstocks.

Recycled-content compounds can support environmental objectives by reducing reliance on virgin polymer feedstock and creating higher-value uses for recovered plastics. Their environmental benefit depends on factors including the source and quality of the recycled material, collection and processing methods, additive requirements, product service life, and end-of-life recovery.

The use of modified polymers also involves trade-offs. Glass fiber, mineral fillers, flame-retardant systems, and multilayer formulations can improve product performance but may complicate recycling or increase material complexity. Consequently, sustainability assessments require consideration of the full product life cycle rather than recycled content alone.

Quality Management and Certifications

CHINAPLAS lists Ningbo Delilong New Material Technology Co., Ltd. as a Specialized, Precise, Special and New enterprise, reflecting recognition under a Chinese government classification for specialized small and medium-sized industrial companies.

For compounders serving transportation, energy, and industrial customers, quality management generally encompasses incoming-material inspection, formulation control, extrusion-process monitoring, pellet inspection, traceability, and application testing. Relevant technical evaluations may include tensile and impact properties, flexural performance, melt-flow behavior, thermal resistance, flame performance, color consistency, moisture content, and aging behavior.

Specific certification systems, automotive approvals, and product-level regulatory listings should be assessed by individual material grade and application, because compliance requirements vary according to polymer type, additive package, customer specification, and intended market.

Innovations and Future Outlook

Delilong’s future development is closely connected to structural changes in the plastics industry. Important opportunity areas include:

• Lightweighting of automotive and transportation components.
• Increased use of engineering plastics in electric vehicles and battery-related equipment.
• Materials for thermal management and electrical insulation.
• Flame-retardant compounds for rail, energy, and electronic applications.
• Higher-performance recycled-content materials.
• Replacement of metal parts where polymer compounds can reduce weight, assembly complexity, or corrosion risk.
• Greater use of application-specific grades instead of standardized commodity materials.

The company’s multi-site production structure and extensive twin-screw equipment base provide a platform for serving customers requiring multiple formulations and delivery locations. Future competitiveness will depend on maintaining consistent quality across facilities, converting technical capabilities into validated customer applications, managing raw-material volatility, and meeting increasingly demanding environmental and product-compliance expectations.

Summary

Ningbo Delilong New Material Technology Co., Ltd. is a Ningbo-based Chinese polymer compounder established in 2007. Formerly associated with the name Ningbo Delong Nylon Technology Co., Ltd., it has expanded from a nylon-focused identity into a broader portfolio encompassing modified new materials, specialty engineering plastics, and PCR high-performance environmental materials.

The company reports three production bases, approximately 150,000 tonnes of annual modified-plastics capacity, and more than 80 high-torque twin-screw production lines. Its materials are positioned for automotive, aerospace, new-energy, rail-transportation, and intelligent-equipment applications, where reinforcement, flame retardancy, toughness, durability, chemical resistance, electrical performance, and thermal management are important.

Within the global plastics ecosystem, Delilong represents the increasingly important role of regional and national compounders that adapt polymer materials to the specialized requirements of downstream manufacturers. Its development will be shaped by the growth of electrification, demand for lighter components, expansion of recycled-content materials, and the need for reliable, application-specific polymer performance.

References

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  CPS+ eMarketplace. (n.d.). NINGBO DELILONG NEW MATERIAL TECHNOLOGY CO., LTD.NINGBO DELILONG NEW MATERIAL TECHNOLOGY CO., LTD.. CPS+ eMarketplace. https://www.chinaplasonline.com/eMarketplace/ExhibitorInfo?CompId=1039051Link