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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.
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

Blog Details

Do domu Blog

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.
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

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Obiekty pomocnicze

Linia do wytłaczania arkuszy z tworzywa sztucznego

Linia do wytłaczania płyt

Linia do wytłaczania folii

Linia do wytłaczania folii słonecznej Eva

Maszyna do wytłaczania arkuszy zwierząt domowych

Linia do produkcji membran hydroizolacyjnych

Linia do produkcji podłóg

Wytłaczanie profili pustych

Wytłaczanie termoformujące

Maszyna do wytłaczania arkuszy PCV

Linia do produkcji włóknin typu meltblown

Linia do wytłaczania folii stretch

Obiekty pomocnicze

Blog Details

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?

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?