Garbage Bag Making Machines —
Four Technologies, Seven Models

A flat-seal bag has a single linear heat-seal running across the bottom. A star-seal bag has multiple seal points radiating from the centre of the base — typically 8 to 12 points — creating a reinforced bottom that distributes load stress across the entire base rather than concentrating it on one seam. Star-seal bags are stronger at equivalent film thickness, which is why they are the preferred format for retail bin liner rolls worldwide. The LQ-GB2L series produces star-seal bags exclusively.

Both are dual-lane star-seal machines with the same maximum speed (220×2 pcs/min), but they serve different production strategies. The LQ-GB2L-350 is a fixed-format specialist: bag width and length are fixed at 300 mm and 800 mm respectively. Its simpler mechanical structure means lower power consumption (10 kW vs 18 kW) and lower machine weight (1,800 kg vs 4,000 kg). It is the right choice if you produce one standard bin liner SKU at maximum volume. The LQ-GB2L-400 has adjustable width (80–300 mm) and length (500–1,500 mm), supports PBAT biodegradable film, and suits factories that need to produce multiple bag sizes or serve markets with biodegradable bag requirements.

A C-fold machine seals and perforates wide-format PE film in the standard way, then passes the film through a dedicated C-fold unit before winding. The C-fold unit folds the film lengthwise — a 1,000 mm wide bag becomes a 500 mm wide folded strip — before it is wound onto the output roll. This allows large-capacity bags (60–120 L) to be packaged in compact rolls that are easier to handle, shelf-stack and ship. The consumer unfolds the bag naturally when pulling it from the roll. Without C-folding, a 1,000 mm bag roll would be impractically large for retail packaging.

The LQ-DG series integrates an automatic ribbon-threading mechanism directly into the bag-making process. As each bag is formed, a continuous ribbon is fed through a channel created at the bag opening during sealing. The ribbon is threaded through this channel in a single pass — no secondary operation is required after the bag exits the machine. The finished bag comes off the line with the drawstring already in place, ready for counting, rolling and retail packaging.

Yes. The LQ-GB2L-400 processes both PE and PBAT film on the same mechanical platform. Switching between the two materials requires adjusting the sealing temperature parameters to match PBAT's different thermal sealing characteristics — no tooling changes, no hardware modifications. The compostability certification (EN 13432 for Europe, ASTM D6400 for North America) is a property of the film material itself, not the machine. You would need to source certified PBAT film and obtain the relevant certification for your finished bags separately.

No. Both LQ-GB2L models are designed to be operated by a single person. The two lanes run in parallel on one machine frame with a unified control system — one operator monitors both lanes, handles film roll changes and manages the output rolls. This is one of the primary advantages of the dual-lane design: you achieve the output equivalent of two single-lane machines with one operator and significantly less floor space.

The two models are identical in speed (50–160 pcs/min), power (18 kW), footprint and weight. The only difference is the bag width and length range. The LQ-DG-800 covers 400–700 mm width and 300–1,000 mm length — suitable for kitchen and bathroom bin sizes (typically 30–50 L). The LQ-DG-1000 covers 500–900 mm width and 500–1,000 mm length — suitable for larger household bins and outdoor waste containers (typically 50–80 L). If your product range spans both size categories, you may need both models.

Yes. The LQ-PG-260 winder unit supports both cored and coreless roll configurations. The coreless configuration is specifically relevant for municipal park dispensers and wall-mounted pet waste bag stations, which require rolls without a cardboard core. The machine's tube-core vibration plate supply system handles automatic core feeding for cored rolls; the coreless configuration bypasses this system. Contact LayerQuestar to confirm the specific winder setup for your target dispenser format.

All models in the garbage bag machine range accept flat-wound film rolls as input. The required film width equals twice the finished bag width (for folded-film machines) or the full bag width (for single-layer machines), plus sealing allowance. Film thickness must fall within the machine's specified range — see the full specification table above. If you are producing your own film on a LayerQuestar blown film machine, the output rolls feed directly into the bag machine without additional processing. Contact LayerQuestar to confirm roll diameter, core size and film tension specifications for your specific model combination.