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Blog Details
Created with Pixso. 家へ Created with Pixso. ブログ Created with Pixso.

How to Eliminate Bubbles and Gels in a TPU Cast Film Lamination Line?

How to Eliminate Bubbles and Gels in a TPU Cast Film Lamination Line?

2026-08-12
  • Introduction: TPU (Thermoplastic Polyurethane) is highly hygroscopic and heat-sensitive, making it notorious for causing bubbles or "fish-eyes" (gels) during processing. If your production suffers from these surface defects, optimizing your TPU cast film lamination line is the ultimate fix.
  • The Problem: Moisture in TPU resin breaks down the molecular weight at high extrusion temperatures, leading to volatile gas bubbles, reduced transparency, and lower peeling strength.
  • GWELL’s Precision Solutions:
    • Advanced Pre-Drying System: GWELL integrates a specialized honeycomb dehumidifying hopper dryer that drops moisture content to below 0.02%. An automatic vacuum feeder ensures stable, moisture-free raw material delivery.
    • Anti-Sticking Hopper & Feed Port: Because dried TPU pellets easily stick, GWELL utilizes a uniquely designed feed throat cooling and special barrel discharge opening to ensure non-stop, smooth feeding.
    • Low-Shear Barrier Screw: Our specialized barrier single screw (GWS series) alternates mixing zones to achieve thorough plasticization without overheating the melt, eliminating the root cause of thermal gels and crystallization points. 
  • Conclusion: Eliminating defects requires precision from the feeding throat to the die. Partnering with GWELL ensures your TPU cast film lamination line delivers crystal-clear, defect-free premium film every time. 
  • 最新の会社ニュース How to Eliminate Bubbles and Gels in a TPU Cast Film Lamination Line? 0最新の会社ニュース How to Eliminate Bubbles and Gels in a TPU Cast Film Lamination Line? 1最新の会社ニュース How to Eliminate Bubbles and Gels in a TPU Cast Film Lamination Line? 2
  • Request a Tailored Quote for Your TPU Project
    Contact GWELL’s professional technical engineers today to discuss your production layout and obtain competitive pricing.
  • Contact Persons: Liam / Max
  • Email: saled@gwell.cn / salem@gwell.cn
  • Tel/WhatsApp (Liam): +86 15906224102
  • Tel/WhatsApp (Max): +86 15906227399
 
バナー
Blog Details
Created with Pixso. 家へ Created with Pixso. ブログ Created with Pixso.

How to Eliminate Bubbles and Gels in a TPU Cast Film Lamination Line?

How to Eliminate Bubbles and Gels in a TPU Cast Film Lamination Line?

  • Introduction: TPU (Thermoplastic Polyurethane) is highly hygroscopic and heat-sensitive, making it notorious for causing bubbles or "fish-eyes" (gels) during processing. If your production suffers from these surface defects, optimizing your TPU cast film lamination line is the ultimate fix.
  • The Problem: Moisture in TPU resin breaks down the molecular weight at high extrusion temperatures, leading to volatile gas bubbles, reduced transparency, and lower peeling strength.
  • GWELL’s Precision Solutions:
    • Advanced Pre-Drying System: GWELL integrates a specialized honeycomb dehumidifying hopper dryer that drops moisture content to below 0.02%. An automatic vacuum feeder ensures stable, moisture-free raw material delivery.
    • Anti-Sticking Hopper & Feed Port: Because dried TPU pellets easily stick, GWELL utilizes a uniquely designed feed throat cooling and special barrel discharge opening to ensure non-stop, smooth feeding.
    • Low-Shear Barrier Screw: Our specialized barrier single screw (GWS series) alternates mixing zones to achieve thorough plasticization without overheating the melt, eliminating the root cause of thermal gels and crystallization points. 
  • Conclusion: Eliminating defects requires precision from the feeding throat to the die. Partnering with GWELL ensures your TPU cast film lamination line delivers crystal-clear, defect-free premium film every time. 
  • 最新の会社ニュース How to Eliminate Bubbles and Gels in a TPU Cast Film Lamination Line? 0最新の会社ニュース How to Eliminate Bubbles and Gels in a TPU Cast Film Lamination Line? 1最新の会社ニュース How to Eliminate Bubbles and Gels in a TPU Cast Film Lamination Line? 2
  • Request a Tailored Quote for Your TPU Project
    Contact GWELL’s professional technical engineers today to discuss your production layout and obtain competitive pricing.
  • Contact Persons: Liam / Max
  • Email: saled@gwell.cn / salem@gwell.cn
  • Tel/WhatsApp (Liam): +86 15906224102
  • Tel/WhatsApp (Max): +86 15906227399