If you run a bag making machine (side seal, bottom seal, or FFS machines), you know the frustration: melted plastic residue builds up on standard belts, causing poor seal quality, stuck bags, and constant cleaning stops.

The solution? A silicone belt for bag making machines — specifically designed to resist heat and release molten plastic instantly.

But not all silicone belts are equal. Below is a practical guide for bag makers to select, maintain, and source the right silicone belt for your specific OEM machine.

1. Why Silicone? The Non-Stick Advantage for Bag Making

Standard PU or PVC belts absorb heat and allow molten polyethylene (PE) or polypropylene (PP) film to stick. This causes:

• Poor bag release – bags wrap around the belt instead of discharging
• Seal contamination – burnt plastic transfers to sealing jaws
• Frequent cleaning – production stops to scrape off residue
• Premature belt failure – hardened plastic cracks the belt surface

Silicone belts solve these problems:

Bottom line: Switching to a silicone belt reduces cleaning downtime by 70–80% and extends belt life 3–5x.

2. Heat Resistance – The #1 Requirement for Bag Sealing

Bag making machines operate near sealing jaws at 150–200°C (302–392°F) . Radiant heat and occasional contact destroy ordinary belts.

What temperature rating do you need?

Machine Type	Sealing Temperature	Minimum Belt Rating
Side seal bag machine	150–180°C (302–356°F)	200°C continuous
Bottom seal bag machine	160–200°C (320–392°F)	230°C continuous
FFS (form-fill-seal)	140–170°C (284–338°F)	200°C continuous

Annilte silicone belt series:

Grade	Continuous Temp	Intermittent Temp	Best For
SI-200	200°C (392°F)	230°C (446°F)	Most side/bottom seal machines
SI-230	230°C (446°F)	260°C (500°F)	High-speed or high-heat lines
SI-FDA	200°C (392°F)	230°C (446°F)	Food-contact applications

Warning: Cheap "silicone-coated" belts only have a thin surface layer. Once it wears through (usually 2–3 months), the underlying belt fails. Annilte belts are solid silicone or full-thickness silicone compound — no coating to wear off.

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3. Surface Finish – Smooth vs. Textured for Bag Release

The belt surface finish affects how bags release and stack.

Surface	Best For	Advantage
Smooth (glossy)	Thin films (20–50 microns), high-speed lines	Maximum release, minimal drag
Fine texture	Medium films (50–100 microns), stacked bags	Prevents bag sliding, better stacking
Coarse texture	Thick films, heavy bags	Maximum grip, prevents bag wandering

Annilte standard: We offer all three finishes. Most bag makers prefer smooth or fine texture for optimal release.

Ask your supplier: Can you provide samples of each finish for testing? We can — free of charge.

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4. OEM Compatibility – Exact Fit for Your Bag Machine

Your bag making machine expects specific belt dimensions and construction. Using the wrong belt causes tracking issues, tension problems, or complete incompatibility.

Annilte maintains OEM cross-references for major bag machine brands:

Brand	Common Machine Models	Belt Type / Spec	Annilte Replacement Part #
Totani	Totani G series, N系列	Silicone flat belt, 2mm thick, 50mm wide	AN-TOT-SI-2050
Hudson Sharp	Hudson Sharp 1060, 1080	Silicone timing belt, T5 pitch	AN-HS-T5-SI
Windmöller & Hölscher (W&H)	W&H AD 2000, AD 3000	Silicone flat belt with V-guide	AN-WH-VG-SI
GN Equipment	GN 800, GN 1200	Silicone belt, 3mm thick	AN-GN-SI-3MM
Mamata	Mamata Mega, Plus series	Silicone flat belt, 1.5mm	AN-MAM-SI-15
Lohia	Lohia Star, Lohia Plus	Silicone timing belt, AT5	AN-LOH-AT5-SI
FFS machines	Various (Bosch, Rovema, Ulma)	Silicone belt, custom length	Contact Annilte