Choosing the Right Extruder for GAG Decorative Sheets: Single-Screw vs. Twin-Screw for the Indian Market

In the production of high-quality GAG (PETG/APET/PETG) co-extruded decorative sheets, the machinery configuration dictates your product capability. While the main extruder handling the core APET layer is universally a twin-screw system, choosing the right co-extruder for the PETG skin layer requires careful consideration of your target product mix.

Currently, three distinct finishes dominate Indian interior trends: High Gloss (Glossy), Skin Matt (Super Matt), and Sparkle (Metallic Flake).

The Tech Showdown: Twin-Screw vs. Single-Screw for PETG

Depending on your business model, GWELL offers two highly optimized configurations for the PETG layer co-extruder:

The "Sparkle" Factor: Why Single-Screw Wins for Metallic Finishes

The Sparkle finish is exceptionally popular across Indian modular kitchen catalogs. To achieve this, a metallic sparkle masterbatch must be blended into the PETG layer.

If a twin-screw extruder is used, its intense, high-shear screw structure will crush the metallic flakes into a dull powder, ruining the reflective glitter effect. GWELL’s specialized single-screw co-extruder uses a gentle, low-shear design that preserves the masterbatch integrity, ensuring a flawless, shimmering Sparkle finish that commands premium pricing in Mumbai, Delhi, and Bangalore.