SAN RUN PLASTIC TECHNOLOGY CO., LTD.

Introduction

San Run Plastic Technology Co., Ltd. (Chinese: 东莞市三润塑胶科技有限公司), also associated with the name Dongguan Zhongyi (Sanli) Masterbatch Manufactory, is a Dongguan-based Chinese plastics-materials manufacturer specializing in black masterbatch, black color concentrates, and desiccant masterbatch. The company operates from Daojiao Town, Dongguan, Guangdong Province, one of southern China’s principal plastics-processing and manufacturing centers.

San Run’s products occupy an intermediate position in the plastics value chain. Rather than producing commodity polymers, the company supplies concentrated additives and pigments that are compounded into thermoplastics during extrusion, injection molding, blow molding, film production, pipe manufacture, and related conversion processes. Its business therefore connects polymer producers with processors seeking controlled coloration, opacity, ultraviolet protection, moisture management, and consistent processing performance.

Founded in 2005, the company has developed production capacity around the Sanli brand. Business-directory information describes a manufacturing base with multiple production lines and annual black-masterbatch capacity of approximately 40,000 tonnes, although capacity figures may vary by reporting period and source. The company’s market significance lies primarily in its specialization, manufacturing scale, and participation in the increasingly international supply chain for polymer concentrates.

History and Development

San Run was established in 2005 as a manufacturer focused on masterbatch research, production, and marketing. Its development can be outlined through several reported milestones:

2005: Establishment of the company and commencement of activity in masterbatch manufacturing.
Early expansion: The company expanded its production base from an earlier reported seven production lines to a later reported ten high-class production lines.
Capacity development: Reported annual production and sales increased from approximately 25,000 tonnes in earlier company-directory information to approximately 40,000 tonnes in later listings.
International sales: Sanli-branded products have been marketed to customers in overseas markets, reflecting the export-oriented character of Guangdong’s plastics industry.

These milestones correspond with broader changes in China’s plastics sector, including the growth of specialized compounders, increasing demand for customized polymer formulations, and the relocation of plastics-processing supply chains toward integrated regional manufacturing clusters.

Business Operations and Segments

San Run’s business is centered on the manufacture and commercialization of polymer concentrates. Its principal operating activities include:

Formulation and production of black masterbatch.
Manufacture of black color chips or color concentrates.
Production of desiccant masterbatch.
Technical support associated with the selection and processing of concentrates.
Domestic and international sales under the Sanli brand.

The company is identified in commercial directories as a manufacturer and factory rather than as a distributor or machinery supplier. Its position in the plastics ecosystem is therefore based on materials production and formulation rather than downstream conversion.

Masterbatch producers typically purchase or process pigments, carrier resins, dispersing agents, and performance additives. They then combine these materials into concentrated pellets that can be metered into a base polymer at the processor’s facility. This approach allows processors to change color or additive content without handling large quantities of fine powders.

Products and Technologies

Black Masterbatch

Black masterbatch is the company’s principal product category. It generally contains a high concentration of carbon black dispersed in a polymer carrier, together with additives selected for dispersion, processing stability, and end-use requirements.

Key performance considerations include:

Carbon-black dispersion and resistance to agglomeration.
Color strength, opacity, and jetness.
Compatibility between the carrier resin and the base polymer.
Melt-flow behavior during extrusion or molding.
Resistance to ultraviolet radiation and weathering.
Mechanical-property retention after compounding.
Consistency between production batches.

Black masterbatch is commonly supplied in pellet form for use in polyethylene, polypropylene, and other thermoplastic systems. The appropriate formulation depends on the processing method and the intended application. Film production, for example, may require good dispersion and low defect rates, whereas outdoor products may require enhanced weatherability.

Black Color Chips

Black color chips are concentrated colorants designed to provide controlled coloration in polymer-processing operations. They may be used where processors require a defined color concentrate rather than a general-purpose black formulation.

Their technical suitability depends on the carrier resin, dosage rate, pigment concentration, and processing temperature. Consistent pellet geometry and uniform pigment distribution are important because irregular concentration can produce streaking, shade variation, or localized defects in the finished product.

Desiccant Masterbatch

Desiccant masterbatch is used to reduce the effects of moisture in hygroscopic or moisture-sensitive recycled and virgin polymers. During processing, residual moisture can generate bubbles, surface defects, voids, reduced mechanical performance, and other quality problems.

A desiccant concentrate generally incorporates moisture-absorbing components into a compatible polymer carrier. Its performance is influenced by:

Moisture content in the feedstock.
Dosage and residence time.
Polymer type.
Processing temperature.
Storage conditions before processing.
The degree of moisture protection required by the final product.

Desiccant masterbatch can be relevant to film, injection-molded articles, packaging, and recycled-polymer applications. It does not replace appropriate drying and storage practices in every process, but it can form part of a processor’s moisture-control strategy.

Processing Compatibility

Masterbatch products must be matched to the host polymer and processing equipment. Important variables include extrusion temperature, screw configuration, shear level, residence time, dilution ratio, and the required surface quality of the final article.

For processors, equipment compatibility may include:

Single-screw or twin-screw compounding and extrusion lines.
Film-blown and cast-film equipment.
Injection-molding machines.
Blow-molding systems.
Pipe and profile extrusion lines.
Fiber and filament-processing equipment.

The company’s commercial role is consequently not limited to pigment supply. Product selection also involves formulation compatibility, dispersion behavior, dosing accuracy, and the production conditions of the customer.

Applications and End Markets

San Run’s product categories serve a broad range of plastics applications, particularly those requiring black coloration, opacity, weatherability, or moisture control. Likely application areas associated with these materials include:

Flexible and rigid packaging.
Agricultural and industrial films.
Pipes, fittings, and cable compounds.
Household and consumer products.
Automotive and electrical components.
Construction materials.
Plastic bags and liners.
Recycled-polymer products.
Injection-molded and blow-molded articles.

Black masterbatch is especially important in products where visual uniformity, light blocking, and outdoor durability are required. In recycled plastics, black concentrates may also help standardize the appearance of feedstocks with varying colors, although color adjustment does not remove the need to control contamination, polymer degradation, or additive compatibility.

Global Presence and Market Position

San Run is located in Dongguan, a major manufacturing center with dense links to polymer suppliers, compounders, mold makers, machinery companies, packaging producers, and export logistics networks. This location can support short supply chains for customers in southern China and facilitate access to international markets through the wider Guangdong manufacturing region.

Company-directory information describes Sanli products as being sold worldwide. The available business information does not establish a specific global market share, revenue ranking, or comparative position against larger multinational additive and masterbatch producers. San Run is more appropriately understood as a specialized Chinese manufacturer competing through product focus, manufacturing capacity, formulation expertise, and customer responsiveness.

Its competitive environment includes:

Large international masterbatch suppliers with broad technical portfolios.
Chinese regional producers serving specific polymer-processing clusters.
Integrated compounders that manufacture both base compounds and concentrates.
Lower-cost suppliers competing primarily on standard black formulations.

The company’s ability to compete internationally depends on consistent quality, reliable lead times, formulation customization, regulatory compliance, and technical support. These factors have become increasingly significant as plastics processors manage volatile raw-material prices, stricter product regulations, and more demanding requirements for recycled content.

Research and Development

San Run describes its activity as including technical research and development in black masterbatch, color concentrates, and desiccant masterbatch. Directory information also identifies an internal research and development team of approximately five to ten personnel.

For a masterbatch manufacturer, research and development generally involves:

Optimizing pigment loading and dispersion.
Selecting carrier resins for different polymer families.
Improving color strength and dilution efficiency.
Adjusting flow behavior for extrusion and molding.
Developing formulations for recycled or mixed-quality feedstocks.
Improving moisture-absorption performance in desiccant grades.
Testing compatibility with customer processing conditions.

The practical value of this work is measured not only by laboratory properties but also by stable performance on production equipment. A formulation that produces the required shade while minimizing filter blockage, surface defects, pressure variation, or mechanical-property loss can reduce waste and improve processor productivity.

Sustainability and Environmental Considerations

Masterbatch products can contribute to material efficiency by allowing pigments and additives to be delivered in concentrated form. Concentrated dosing may reduce the handling and transport of bulk pigment powders and can help processors achieve consistent color with controlled additive quantities.

Desiccant masterbatch may also support the processing of recycled polymers by helping manage residual moisture in certain feedstocks. Its effectiveness, however, depends on the condition of the recycled material and the overall process. It should be considered one component of a broader quality-control system that includes sorting, washing, drying, filtration, and appropriate storage.

The environmental profile of black masterbatch depends on the pigments, carrier resins, additives, energy consumption, production waste, packaging, and end-of-life treatment of the finished plastic article. Carbon black itself is not a substitute for circularity measures, and black coloration can affect the ability of some optical sorting systems to identify polymers for recycling. Consequently, sustainability assessments must consider the complete product and recycling pathway rather than the concentrate alone.

The company’s participation in the broader plastics industry places it within several major transition themes:

Greater use of recycled polymers.
Demand for lower-waste and higher-yield processing.
Development of formulations compatible with recycled feedstocks.
Pressure to improve production energy efficiency.
Increasing scrutiny of additive composition and product traceability.

Quality Management and Certifications

Commercial directory information lists ISO 9001 and ISO 14000 management-system certifications for the company. ISO 9001 concerns quality-management systems, while the ISO 14000 family addresses environmental-management practices. Certification indicates the use of structured management procedures, but it does not by itself guarantee identical performance across every product or application.

For masterbatch customers, quality assurance typically includes:

Incoming inspection of pigments, polymers, and additives.
Controlled formulation and batch records.
Melt-flow and dispersion testing.
Color and opacity evaluation.
Moisture-performance testing for desiccant grades.
Batch traceability.
Retention samples and corrective-action procedures.

End-use approvals and regulatory compliance must be evaluated according to the specific formulation and destination market. Requirements can differ substantially for packaging, food-contact materials, toys, electrical products, automotive components, and construction applications.

Innovations and Future Outlook

San Run’s future development is likely to be shaped by the technical and commercial pressures affecting the masterbatch industry. Important opportunities include:

Higher-performance black formulations for demanding outdoor and automotive applications.
Products designed for recycled polyethylene and polypropylene.
Improved dispersion at lower addition rates.
Desiccant masterbatch for variable-quality recycled feedstocks.
More precise color control and digital quality monitoring.
Formulations designed to support recyclability and regulatory compliance.
Expansion of technical services for overseas customers.

The company’s established concentration in black masterbatch provides a clear specialization, but specialization also exposes manufacturers to fluctuations in carbon-black costs, polymer-carrier prices, construction and packaging demand, and international trade conditions. Future competitiveness will depend on maintaining product consistency while adapting to changing requirements for recycled content, chemical transparency, and environmental performance.

Summary

San Run Plastic Technology Co., Ltd. is a Dongguan-based plastics-materials manufacturer established in 2005 and associated with the Sanli brand. Its principal activities are the production of black masterbatch, black color concentrates, and desiccant masterbatch for thermoplastic processors.

The company occupies a specialized position in the plastics value chain, supplying materials used to control color, opacity, weatherability, and moisture during extrusion, molding, film production, and related processes. Reported expansion from seven to ten production lines and annual capacity figures rising from approximately 25,000 to 40,000 tonnes indicate substantial manufacturing development, although such figures should be interpreted according to the reporting period.

Its longer-term prospects depend on technical consistency, international market access, compatibility with recycled polymers, quality management, and the ability to respond to increasingly stringent sustainability and regulatory expectations across the global plastics industry.

References

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CPS+ eMarketplace. (n.d.). SAN RUN PLASTIC TECHNOLOGY CO., LTD.SAN RUN PLASTIC TECHNOLOGY CO., LTD.. CPS+ eMarketplace. https://www.chinaplasonline.com/eMarketplace/ExhibitorInfo?CompId=1009293Link