CE Certified Infrared Rotary Dryer + SSP system Manufacturer, Supplier

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CE Certified Infrared Rotary Dryer + SSP system Manufacturer, Supplier

Application: To increase the viscosity of rPET flakes/pellets IV increased: From 0.50dL/g to 1.2dL/g Processing time: 8-10hours Save energy 40-50% PET decontamination Efficient moisture remove - Precise viscosity increase - Low-consumption operation" CE certificate: The equipment complies with the EU Machinery Directive 2006/42/EC

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Product Description

Solid-state polymerization (SSP) is the core technology for achieving "quality upgrade" and "green recycling" in the PET industry. By integrating the Infrared Rotary Dryer with the SSP system, an advanced solution is formed: "Efficient moisture removal - Precise viscosity increase - Low-consumption operation." This approach significantly enhances rPET physical properties, thermal stability, and chemical purity, making it indispensable for high-performance production.

PET Preform Applications

High Transparency Bottle Production: Ensures PET viscosity uniformity and reduces stress cracking, ideal for carbonated drinks and cosmetics.

Heat-Resistant Bottle Development: Increases IV values above 0.85 dL/g, perfect for heat-filled packaging like tea and coffee.

Technical Process

Reaction Conditions: Temperatures are maintained at 200–240°C. Through nitrogen introduction and vacuum drawing, reaction byproducts like ethylene glycol (EG) are removed, driving polycondensation.

Chemical Mechanism: Hydroxyl and carboxyl end groups undergo condensation to form ester bonds, effectively extending molecular chains and increasing intrinsic viscosity (IV).

Engineering Plastics & Recycling

High-Performance PET: Production of high-viscosity PET (IV > 1.0 dL/g) for automotive gears, bearings, and electronic housings.

Recycled PET Quality Upgrade: Post-consumer bottle flakes undergo "drying - decontaminated - viscosity enhancement" to remove VOCs and acetaldehyde, restoring the material to food-grade standards.

Performance Overview

Advantage	Performance
Molecular Weight	IV significantly increased; strength improved by 30–50%.
Thermal Stability	Melting point increased by 5–10°C; enhanced heat resistance.
Chemical Purity	Oligomers and monomers drop below 50 ppm.
Gentle Handling	Solid-state reaction avoids oxidative degradation.
Flexibility	Precise control over temperature and vacuum time.

Frequently Asked Questions

What is the main benefit of SSP?It enables high-quality rPET production by increasing intrinsic viscosity and purity for food-grade applications.

Why use Infrared Dryer (IRD)?IRD provides rapid, uniform heating, significantly shortening pretreatment time and saving energy.

What IV level is achieved?The IV can be tailored to specific needs, reaching well above 0.85 dL/g or even 1.0 dL/g for engineering plastics.

Is this suitable for food-grade recycling?Yes, the process effectively removes VOCs and acetaldehyde, meeting stringent food-grade standards.

Does the process damage PET material?No, solid-state reactions are gentle and avoid the thermal oxidative degradation common in high-temperature melting.