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IV Improvement Made Easy with Advanced SSP Technology

Professional manufacturer of Solid State Polycondensation (SSP) machines for PET, RPET, Nylon (PA6, PA66), Aramid, Spandex, PTT, PPS, PBS, PLA, PBT and more.

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About Rongsheng Machinery

Zhangjiagang Rongsheng Machinery Co., Ltd. is a leading Chinese enterprise specializing in the design and manufacturing of Solid State Polycondensation (SSP) equipment. With over a hundred sets of equipment in operation across more than 30 countries, we are committed to delivering reliable, energy-efficient, and highly automated solutions for polymer enhancement.

Our SSP machines are engineered for stability and ease of operation, supporting a wide range of materials including PET, RPET, nylon (PA6, PA66), aramid, spandex, PTT, PPS, PBS, PLA, and PBT—used in chemical fibers, industrial fibers, and non-woven fabrics.

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SSP Machine Factory

Our Product Range

Discover our advanced SSP solutions designed for industrial efficiency, precision, and scalability.

High Efficiency SSP Machine

High Efficiency SSP Machine

Optimized for maximum throughput and energy savings. Ideal for large-scale PET and RPET production with precise temperature and residence time control.

  • • Automated feeding & discharging
  • • Energy-saving design
  • • Supports IV increase from 0.6 to 1.2+
  • • Applicable to PET, RPET, PBT
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Common SSP Machine

Common SSP Machine

Reliable and stable performance for standard polycondensation needs. Widely used in polyester and nylon processing industries.

  • • Stable operation
  • • Easy maintenance
  • • Suitable for PA6, PA66, PET
  • • Batch or continuous processing
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Laboratory SSP Testing Machine

Laboratory SSP Testing Machine

Compact and precise testing unit for R&D and quality control. Enables customers to test raw materials before full-scale production.

  • • Small footprint
  • • Accurate IV measurement
  • • Ideal for PLA, PBS, PTT
  • • Supports sample testing
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Continuous SSP Reactor

Continuous SSP Reactor

Designed for uninterrupted production lines, ensuring consistent IV improvement with minimal downtime.

  • • Continuous feeding system
  • • Uniform heating
  • • High automation level
  • • For PET, RPET, PBT
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Batch SSP System

Batch SSP System

Flexible solution for medium-scale operations with customizable cycle times and temperature profiles.

  • • Programmable logic control
  • • Multiple batch sizes
  • • Suitable for nylon & aramid
  • • Low energy consumption
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High-Temp SSP for Aramid

High-Temp SSP for Aramid

Specialized system for high-performance fibers requiring elevated temperatures and inert gas environments.

  • • Nitrogen or vacuum atmosphere
  • • Up to 300°C operation
  • • For aramid, spandex, PPS
  • • Corrosion-resistant materials
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Energy-Saving SSP Unit

Energy-Saving SSP Unit

Eco-friendly design with heat recovery systems and optimized insulation for reduced power consumption.

  • • Heat recovery technology
  • • Smart temperature control
  • • Reduced operational costs
  • • For PLA, PBS, bio-based polymers
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Custom SSP Solutions

Custom SSP Solutions

Tailored engineering for unique materials and production requirements. From concept to commissioning.

  • • Full engineering support
  • • Pilot testing available
  • • Turnkey installation
  • • Global service network
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Why Choose Rongsheng Machinery?

Trusted by over 100 customers worldwide, we deliver innovation, reliability, and global support.

Global Expertise

With operations in over 30 countries, our team stays at the forefront of SSP technology and process optimization.

Open Collaboration

We welcome agent partnerships worldwide to ensure fast, localized service and technical support.

Testing & Validation

Our lab-scale SSP machine allows customers to test raw materials and optimize parameters before scaling up.

100+
Global Customers
30+
Countries Served
100+
Machines Installed
15+
Years Experience

Frequently Asked Questions

What is Solid State Polycondensation (SSP)?

SSP is a post-polymerization process used to increase the molecular weight and intrinsic viscosity (IV) of semi-crystalline polymers like PET, PA6, and PLA in their solid state, typically under controlled temperature and inert atmosphere.

Which materials can be processed with your SSP machines?

Our equipment supports PET, RPET, nylon (PA6, PA66), aramid, spandex, PTT, PPS, PBS, PLA, PBT, and other engineering and bio-based polymers used in fibers and non-wovens.

Do you offer testing services for new materials?

Yes, we have laboratory-scale SSP machines to conduct material testing and process optimization before full-scale production.

Can you provide turnkey solutions?

Absolutely. We offer complete turnkey projects including design, manufacturing, installation, commissioning, and training.

Do you have agents or service partners abroad?

Yes, we are actively expanding our global agent network to provide faster local support and service.

Get in Touch

Reach out to us for product inquiries, technical support, or partnership opportunities.

Sales Inquiries

Phone: +86-17779439819
Phone: +86-13962220204
Phone: +86-13776258398

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For detailed product specifications, news, and exhibition updates.

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