ZHANGJIAGANG LIANDA MACHINERY CO., LTD.

Introduction

Zhangjiagang Lianda Machinery Co., Ltd. (张家港市联达机械有限公司) is a Chinese manufacturer of plastics-recycling machinery based in Zhangjiagang, Jiangsu Province. Established in 1998, the company develops and supplies equipment for plastic size reduction, washing, drying, crystallization, extrusion, and pelletizing, with applications spanning post-consumer, post-industrial, and production scrap streams.

Lianda’s principal product classes include PET bottle recycling lines, polyethylene and polypropylene film recycling systems, plastic shredders and crushers, infrared crystallization and dehumidifying dryers, and plastic granulation or extrusion lines. The company states that more than 2,680 machines have been installed since its establishment and that it supplies customized systems to customers in international markets.

The company operates within the plastics machinery segment rather than producing polymer resins or finished plastic goods. Its position in the industry is therefore connected to the development of mechanical-recycling capacity, particularly the conversion of contaminated or mixed plastic waste into reusable flakes, dried feedstock, or recycled pellets. This role has become increasingly significant as recyclers and processors seek to reduce virgin-polymer consumption, comply with recycled-content requirements, and improve material recovery.

History and Development

Lianda traces its origins to 1998, when it began developing machinery for plastic recycling and related processing operations. Its development can be understood through several stages:

Founding and initial equipment development: The company established a manufacturing base in Zhangjiagang and focused on machinery for plastic recycling and auxiliary processing.
Expansion into integrated lines: Its portfolio broadened from individual machines to complete systems for PET bottles, PE and PP films, and other waste-plastic streams, combining shredding or crushing, washing, drying, and extrusion.
Development of specialized drying technology: Lianda added infrared crystallization and dehumidifying-drying equipment, technologies particularly relevant to hygroscopic polymers and PET processing.
Internationalization: The company developed export-oriented sales and service activities, offering equipment configurations and process lines for customers outside China.

The company’s location in Zhangjiagang places it within Jiangsu’s extensive plastics-machinery manufacturing cluster. The region supports access to component suppliers, metalworking capacity, extrusion expertise, and logistics infrastructure serving both domestic and export markets.

Business Operations and Segments

Lianda’s business is organized principally around the design, manufacture, integration, and servicing of recycling and plastics-processing equipment. Its activities include:

Individual recycling machines for size reduction, drying, and material preparation.
Complete recycling lines for defined waste streams.
Extrusion and pelletizing systems for converting prepared plastic feedstock into reusable granules.
Customized equipment development for specified materials, throughput requirements, and factory layouts.

The company’s operating model combines equipment manufacturing with process-line integration. A typical project may require coordinated selection of a shredder or crusher, washing equipment, mechanical or thermal drying, filtration, extrusion, and pelletizing. The appropriate configuration depends on polymer type, contamination level, moisture content, desired output quality, and the intended application of the recycled material.

Products and Technologies

Size-reduction equipment

Lianda supplies single-shaft and double-shaft shredders, plastic crushers, grinders, and related size-reduction equipment. These machines prepare bulky or irregular feedstock for subsequent washing, separation, drying, or extrusion.

Typical feed materials include:

PET bottles and containers.
PE and PP films.
Rigid plastic articles and production scrap.
Agricultural film.
Plastic lumps and other oversize material.

Shredders generally provide coarse reduction with high torque, while crushers and grinders produce more controlled particle sizes suitable for washing systems or downstream extrusion. The selection of rotor design, knife geometry, screen aperture, drive configuration, and feeding system affects throughput, energy consumption, particle-size distribution, and maintenance requirements.

PET bottle recycling systems

PET bottle recycling lines combine several process stages to produce washed and dried PET flakes. A representative line can include:

Bale opening and preliminary sorting.
Label and cap removal.
Crushing into PET flakes.
Cold or hot washing.
Friction washing and rinsing.
Dewatering and thermal or infrared drying.
Separation and final packaging.

The process is designed to remove labels, adhesives, organic residues, metals, dirt, and other polymer fractions. Product quality depends on feedstock sorting, washing chemistry, residence time, water management, contamination control, and the final moisture level. The resulting flakes may be used in fiber, sheet, strapping, injection-molding, or further pelletizing applications, subject to the required quality and regulatory conditions.

PE and PP film recycling lines

Film recycling systems are designed for flexible materials such as post-industrial film, post-consumer packaging film, and agricultural film. These materials present particular processing challenges because they are lightweight, tend to bridge in feeding equipment, and may carry substantial quantities of soil, moisture, paper, or organic contamination.

Lianda’s film-recycling configurations may incorporate:

Film shredding or cutting.
Wet washing and friction cleaning.
Mechanical dewatering.
Thermal drying.
Film compacting or agglomeration.
Extrusion and pelletizing.

The company also identifies film extrusion-drying equipment and film agglomeration equipment within its product range. Agglomeration can increase the bulk density of loose film and improve feeding stability into an extruder, although the thermal history must be controlled to limit degradation.

Drying and crystallization equipment

Lianda manufactures infrared crystallization dryers, plastic dehumidifying dryers, and related drying equipment. These systems are relevant to PET and other polymers whose processing performance is affected by moisture.

PET must generally be dried before melt processing because hydrolytic degradation can reduce molecular weight and impair mechanical properties. Crystallization before drying helps prevent amorphous PET flakes or pellets from sticking together during heating. Infrared systems transfer energy directly to the material and can be integrated with controlled air circulation and dehumidification.

Drying performance depends on:

Initial moisture content.
Polymer form and particle size.
Residence time.
Air dew point and temperature.
Material throughput.
Heat recovery and insulation.
Control of thermal exposure.

For recyclers, stable moisture control is closely linked to extrusion pressure, melt viscosity, pellet quality, and the consistency of the recycled product.

Extrusion and pelletizing equipment

Lianda supplies plastic granulating and extrusion lines, including parallel twin-screw compounding and pelletizing systems. Extrusion lines typically convert washed, dried, or otherwise prepared plastic feedstock into uniform pellets.

Core equipment may include:

Feeders and compactors.
Single-screw or twin-screw extruders.
Melt filtration systems.
Vacuum degassing units.
Strand, water-ring, or related pelletizing equipment.
Cooling, drying, and pellet conveying systems.

Twin-screw extruders are particularly suitable for blending, additive incorporation, and compounding because their screw elements can provide distributive and dispersive mixing. Melt filtration is important when feedstock contains residual paper, aluminum, wood, or other foreign material. The proper filtration arrangement depends on contamination level, polymer viscosity, throughput, and the required frequency of screen changes.

Ancillary and specialized equipment

The company’s described product portfolio also includes PET strapping production lines, XPS-type crushers, and equipment for recycling waste electrical-appliance plastics. These systems address more specialized streams and illustrate the importance of adapting recycling machinery to the physical characteristics of each waste category.

Applications and End Markets

Lianda’s machinery serves recycling and plastics-processing operations associated with several end markets:

Packaging: PET bottles, containers, films, and recycled pellets for packaging-related applications.
Textiles and fibers: PET flakes and pellets used as feedstock for polyester fiber production.
Agriculture: Recycling of agricultural films and other polyethylene-based materials.
Consumer and household products: Recovery of plastics from discarded consumer goods and appliances.
Construction and industrial products: Recycled polymers used in profiles, sheets, pipes, strapping, and molded components.
Plastics conversion: Recycled pellets supplied to injection molders, extruders, compounders, and other processors.

The suitability of recycled material depends on polymer purity, additive composition, odor, color, molecular-weight retention, moisture, and regulatory requirements. Consequently, recycling machinery is increasingly evaluated not only by nominal throughput but also by the consistency and usability of its output.

Global Presence and Market Position

Lianda is headquartered in Zhangjiagang, Jiangsu Province, at Building B11 of the Jinfeng Science and Technology Pioneering Park. The company markets equipment to international customers and describes its business as serving clients across global markets.

Its competitive position is associated with several characteristics:

A product range concentrated on plastic-recycling machinery.
The ability to supply both standalone equipment and integrated lines.
Experience with PET bottles, PE and PP films, and mixed or specialized plastic waste.
Customization of equipment for material characteristics and plant requirements.
Integration of drying, extrusion, filtration, and pelletizing with upstream preparation equipment.

The company competes in a fragmented international machinery market that includes Chinese manufacturers, European equipment suppliers, and regional engineering firms. Competition commonly centers on lifecycle cost, throughput, energy consumption, process stability, automation, spare-parts availability, commissioning support, and the quality of recycled output.

The broader market is influenced by fluctuations in virgin-polymer prices. When virgin resin prices are low, recycled material may face greater commercial pressure; when regulatory obligations, customer commitments, or waste-disposal costs increase, investment in recycling infrastructure can become more attractive.

Research and Development

Lianda’s technology development is focused on practical process engineering for plastic recycling. Its areas of technical emphasis include:

Moisture removal and crystallization of PET.
Washing and decontamination of bottles and films.
Stable feeding of lightweight film.
Size reduction of diverse plastic waste.
Extrusion, melt filtration, and pelletizing.
Adaptation of equipment to customer-specific feedstock and layouts.

The company’s product descriptions identify infrared crystallization drying and dehumidifying drying as specialized capabilities. It also describes customized machinery development for particular materials and specifications.

In recycling machinery, research and development is closely connected to operating conditions rather than to a single machine component. Improvements may involve process sequencing, control systems, knife and rotor configuration, washing-water management, drying efficiency, filtration, and the integration of sensors for temperature, pressure, moisture, and throughput.

Sustainability and Environmental Initiatives

Lianda’s environmental relevance derives primarily from the machinery it supplies for mechanical plastic recycling. Its systems are intended to support the recovery of materials that might otherwise be landfilled, incinerated, or lost from productive use. Recycling can reduce demand for virgin polymer and retain material value, although environmental performance varies according to collection systems, contamination, energy use, water consumption, transport, and the final application of the recycled product.

The company’s equipment addresses several sustainability objectives:

Recovery of PET from post-consumer bottles.
Recycling of PE and PP films.
Processing of agricultural-film waste.
Reuse of industrial and production scrap.
Conversion of prepared waste plastics into recycled pellets.
Reduction of material losses through integrated washing and drying systems.

A balanced assessment must also account for the environmental burdens of recycling operations. Washing lines can require significant water and energy; contaminated feedstock may generate wastewater and reject streams; and thermal drying and extrusion consume electricity. Effective plants therefore require water treatment, process-water recirculation, energy management, contamination control, and responsible handling of residues.

The commercial value of Lianda’s machinery is consequently linked not only to recycling capacity but also to the ability of operators to produce consistent material at acceptable energy, water, and maintenance costs.

Quality Management and Certifications

Lianda’s public company and marketplace materials identify certification and international compliance as elements of its business profile, while third-party supplier information has associated the company with ISO-related quality management and CE, SGS, or BV documentation. The specific certification scope and validity should be evaluated at the level of the relevant legal entity, machine model, and project documentation.

For recycling machinery, quality assurance typically involves:

Verification of fabricated frames, vessels, and pressure-bearing components.
Inspection of electrical and control systems.
Testing of motors, gearboxes, heaters, sensors, and safety devices.
Trial operation using representative feedstock.
Documentation of operating parameters and maintenance requirements.
Conformity assessment for the destination market.

Actual line performance depends on the interaction between machine design, feedstock preparation, operator practices, utilities, and installation quality. Certifications therefore complement, but do not replace, process trials and customer-specific acceptance testing.

Financial Performance and Economic Impact

Lianda is a privately held machinery manufacturer, and detailed public financial statements are not broadly presented in the company materials referenced for this article. Its economic significance is better understood through its role in supplying capital equipment to recyclers and plastics processors.

The company contributes to the plastics economy by:

Supporting investment in domestic and export recycling capacity.
Supplying machinery to small and medium-sized recycling businesses.
Creating demand for fabricated metalwork, electrical equipment, controls, and engineering services.
Enabling the production of recycled flakes and pellets for downstream manufacturers.
Connecting Chinese plastics-machinery manufacturing with international recycling markets.

Revenue prospects in this sector are shaped by project financing, recycled-resin demand, waste-collection infrastructure, resin-price cycles, environmental regulation, and customers’ ability to secure reliable feedstock.

Innovations and Future Outlook

Future opportunities for Lianda are linked to the increasing need for more reliable and economical recycling of difficult waste streams. Several developments are likely to influence its market:

Greater automation of sorting, feeding, washing, and process control.
Higher-efficiency drying and heat-recovery systems.
Improved melt filtration for contaminated feedstock.
Better odor, color, and contaminant management.
Processing systems for multilayer, flexible, and agricultural-film waste.
Integration of digital monitoring for throughput, energy, moisture, and equipment condition.
Greater compatibility with recycled-content requirements and traceability systems.

The company’s established focus on PET, PE, PP, drying, shredding, and extrusion provides a foundation for serving these developments. Its future competitiveness will depend on process reliability, energy and water efficiency, after-sales support, compliance with destination-market requirements, and the ability to demonstrate consistent recycled-material quality.

Mechanical recycling is likely to remain the principal application area for Lianda’s equipment, although chemical recycling, advanced sorting, and new packaging materials may alter the composition and quality of available feedstock. The company’s ability to adapt machinery to changing waste streams and to integrate equipment into more automated plants will be central to its longer-term position.

Summary

Zhangjiagang Lianda Machinery Co., Ltd. is a Jiangsu-based Chinese manufacturer specializing in plastic-recycling and auxiliary processing equipment. Founded in 1998, it supplies shredders, crushers, PET and film recycling lines, washing and drying systems, infrared crystallization equipment, extruders, pelletizers, and related customized machinery.

Its principal contribution to the plastics industry is the provision of equipment that converts discarded or process-generated plastics into flakes, dried feedstock, and recycled pellets. The company’s significance is therefore tied to the expansion of mechanical recycling and to the practical requirements of processors seeking stable, economical, and technically consistent recycled materials. Its future development will depend on technological adaptation, international service capability, resource efficiency, and the changing economics and regulation of the global plastics-recycling market.

References

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CPS+ eMarketplace. (n.d.). ZHANGJIAGANG LIANDA MACHINERY CO., LTD.ZHANGJIAGANG LIANDA MACHINERY CO., LTD.. CPS+ eMarketplace. https://www.chinaplasonline.com/eMarketplace/ExhibitorInfo?CompId=1035869Link