1. Injection Stretch Blow Molding (ISBM)

Best for: High-clarity PET bottles (Water, Carbonated Soft Drinks, Cosmetics).

• The Process: Two-stage process where a preform is injection-molded, then stretched and blown using high-pressure air.
• Key Advantage: Biaxial orientation creates glass-like clarity, high strength, and excellent gas barrier properties.

2. Injection Molding (IM)

Best for: High-clarity PET preforms.

• The Process: PET resin is dried, melted, and injected into multi-cavity molds to create preforms with finished necks.
• Key Advantage: 100% neck consistency ensuring leak-proof sealing and high-speed blowing.

3. Injection Blow Molding (IBM)

Best for: Small, high-precision containers (Pharmaceutical vials, eye drops).

• The Process: Molten plastic is injected onto a core rod and immediately blown into shape.
• Key Advantage: Zero-waste production with no trimming and perfectly finished necks.

4. Extrusion Blow Molding (EBM)

Best for: Complex and large containers (Milk jugs, detergent bottles).

• The Process: A molten plastic parison is extruded, captured in a mold, and inflated.
• Key Advantage: Allows integrated handles and complex shapes.

5. Compression Molding (Closures & Crowns)

Best for: High-volume caps and crown liners.

• The Process: Plastic gobs are compressed into shape under vertical pressure.
• Key Advantage: Dimensional stability with consistent sealing for carbonated beverages.

6. Crown Cap Making Technology

1. Metal Stamping & Forming

• Tinplate (TP) or Tin-Free Steel (TFS), 0.20–0.24 mm thick
• High-speed double-action presses producing over 5,000 caps/minute
• Blanking, drawing, and crimping into 21-tooth shells

2. In-Shell Lining (Compression Molding)

• Molten TPE/PE pellets are dosed and compressed inside the shell
• Creates V or W liner profiles for airtight sealing

3. Material Science: PVC vs PVC-Free

• PVC: Traditional but environmentally restricted
• TPE: Modern PVC-free standard with no taste impact
• Oxygen scavengers used for premium beverages

4. Coating & Lithography

• Food-grade lacquer prevents metal contact
• Offset lithography ensures distortion-free branding