PET Preform

1. Basic Concept: PET preforms are intermediate products manufactured through injection molding of polyethylene terephthalate (PET) resin.

Characterized by their test tube-like shape with threaded neck finishes, these preforms undergo stretch blow molding to transform into various PET plastic containers. They serve as essential components in beverage, food, pharmaceutical, and consumer goods packaging.

2. Key Features
Optical Clarity: Capable of producing crystal-clear containers for optimal product visibility
 Mechanical Strength: Excellent impact resistance and structural integrity
 Lightweight Advantage: 50-70% lighter than glass equivalents, reducing logistics costs
 Barrier Properties: Effective O₂ and CO₂ barrier extending product shelf life
 Food-Grade Compliance: Meets FDA/EC1935 standards for direct food contact
 Circular Economy Ready: 100% recyclable into rPET flakes for fiber or new preforms

3. Manufacturing Process
Material Drying: Pre-drying PET resin to ≤50ppm moisture (typically 150-180°C for 4-6 hours)

Injection Molding:
– Melt temperature: 270-290°C
– Injection pressure: 800-1,200 bar
– Cycle time: 10-30 seconds depending on cavity count

Quality Control:
– Dimensional tolerance: ±0.02mm on critical dimensions
– Weight variation: ≤0.3% for premium grade
– Visual inspection: No flow lines, silver streaks, or black spots

Blow Molding:
– Reheat temperature: 100-120°C (infrared heating)
– Blow pressure: 25-40 bar (two-stage process preferred)
– Production speed: 1,500-2,500 bph for standard 500ml bottles

4. Technical Enhancements
• Inline Crystallization: For hot-fill applications (up to 95°C)
• Multilayer Technology: EVOH barrier layers for sensitive products
• Lightweighting: Achieves <9g for 500ml water bottles (vs. 12g standard)

This version maintains all technical accuracy while improving readability for international audiences, with added production parameters that industry professionals would expect. The bullet point formatting enhances scanability compared to checkmark symbols in professional documents.