Drying and Crystallizing Machine for Pet Pelletizing or Sheet Extrusion

Drying and Crystallizing Machine for Pet Pelletizing or Sheet Extrusion

### **PET Drying & Crystallizing Machine for Pelletizing/Sheet Extrusion**  

**—Precision-Engineered System for Enhanced Polymer Performance**  

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#### **Core Technology**  

1. **Integrated Process Flow**  

  - **Simultaneous Crystallization & Drying**: Combines **fluidized-bed preheating** (120–160°C) and **desiccant dehumidification** (-45°C dew point) in a single unit, reducing total process time by 40%.  

  - **Crystallinity Control**: Achieves 25–50% crystallinity via **three-stage thermal profiling** (ramp/soak/cool), optimized for pelletizing or sheet applications.  

2. **Advanced Moisture Management**  

  - **Dual-Layer Adsorption**: 4A+13X molecular sieves ensure residual moisture **≤40 ppm** (meets ASTM D6868 standards).  

  - **Self-Diagnostic Sensors**: Real-time monitoring of:  

    - Pellet surface temperature (±0.5°C)  

    - Moisture gradient across material bed  

    - Desiccant saturation level  

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#### **System Configuration**  

| Module | Key Innovations |  

|--------|-----------------|  

| **Pre-Treatment** | Magnetic separator removes metallic contaminants (≥99.9% efficiency) |  

| **Crystallizer** | Corrosion-resistant 316L stainless steel chamber with anti-static coating |  

| **Drying Tower** | Rotary valve system minimizes heat loss during material transfer |  

| **Control Hub** | IoT-enabled PLC with predictive maintenance alerts and energy analytics |  

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#### **Technical Specifications**  

| Parameter | Pelletizing Mode | Sheet Extrusion Mode |  

|-----------|------------------|-----------------------|  

| Capacity | 1–8 tons/hour | 0.5–4 tons/hour |  

| Crystallinity | 35–45% | 25–35% |  

| Residual Moisture | ≤30 ppm | ≤50 ppm |  

| Energy Use | 0.18 kWh/kg | 0.22 kWh/kg |  

| Thermal Uniformity | ±1.2°C | ±1.8°C |  

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#### **Critical Advantages**  

1. **Dual-Process Optimization**  

  - **For Pelletizing**: Prevents bridging/sticking with **variable-frequency vibration** (5–25 Hz adjustable).  

  - **For Sheet Extrusion**: Maintains consistent melt flow index (MFI) within ±2g/10min.  

2. **Eco-Smart Features**  

  - Regenerative thermal oxidizer (RTO) reduces VOC emissions by 95%.  

  - 85% waste heat recovery through integrated heat pipes.  

3. **Material Versatility**  

  - Processes virgin PET, rPET (recycled), and PET-G blends without cross-contamination.  

  - Handles varied geometries: pellets (2–5mm), flakes (0.5–3mm), or regrind materials.  

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#### **Certifications & Compliance**  

- **CE Mark** (EN 61439-1 low-voltage directive)  

- **FDA 21 CFR §177.1630** (food-contact compliance)  

- **ISO 50001** (energy management system)  

- **ATEX Zone 22** (optional explosion-proof design)  

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#### **Operational Benefits**  

- **For Pelletizers**: Reduces IV drop to ≤0.03 dl/g, enabling high-clarity bottle-grade resin production.  

- **For Sheet Lines**: Eliminates bubbles/streaks, achieving ≤5 defects per 100m² in APET/CPET sheets.  

- **Energy Savings**: Cuts annual CO₂ emissions by 120+ tons (vs. conventional dryers).  

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**Case Study**:  

A European PET sheet manufacturer achieved:  

- 22% faster line speed (from 12m/min to 14.6m/min)  

- 98.5% yield rate (previously 89%)  

- ROI within 14 months through reduced scrap and energy costs.  

This system is globally deployed in 60+ PET processing plants, delivering ≤50 ppm moisture consistency across 99.2% of production batches. (Word