Continuous Roll Bag Making Machine

A standard bag making machine severs the film completely between each bag, producing individual bags that are stacked and counted for output. A continuous roll bag machine — like the LayerQuestar LQ-CRB series — perforates the film between bags instead of cutting through it. The bags remain physically connected on a roll, with a tear-off perforation line between each one.

The practical result is a roll of bags that can be placed on a retail shelf dispenser, loaded into a supermarket bag holder, used in a hotel amenity kit, or fed into a factory production line — all without any secondary packaging step. If your product needs to be dispensed from a roll, the LQ-CRB series is the correct machine. If you need individual stacked bags, see the Flat Bag Making Machine.

Yes. The bags-per-roll count is operator-programmable via the microcomputer control panel. You enter your target count before the production run begins. The machine tracks the count automatically and signals the operator when the preset number is reached so the output roll can be changed.

This makes it straightforward to produce rolls of different counts for different products or customers — for example, 20-bag rolls for household garbage bags and 100-bag rolls for supermarket produce bags — simply by changing the count setting on the panel between runs.

The LQ-CRB series uses flat-seal technology and produces bottom-sealed open-top bags in continuous roll format. Typical products include: household and commercial garbage bags on a roll, supermarket produce bags on a roll, product packaging sleeves on a roll for factory production lines, and sanitary bags for hotel or medical use.

The machine does not produce bags with handle punches, zipper closures, or star-seal (drawstring-style) bottoms. For those bag types, LayerQuestar offers separate machine models.

The integrated winding station is standard on all four LQ-CRB models — it is not an optional extra. Every machine ships with the winding unit installed and configured. This is what distinguishes the LQ-CRB series from other LayerQuestar bag making machines, which output individual stacked bags and do not include a winding station.

The stepping motor is the standard drive system and is suitable for most plain (unprinted) film applications — garbage bags, produce bags, plain packaging sleeves. It provides reliable fixed-length feed control at a lower cost.

The servo motor is an optional upgrade that provides higher positioning accuracy, better performance with pre-printed film registration, and reduced film waste during startup and speed changes. It is recommended for branded printed roll bags where the seal and perforation must align precisely with the printed design on every bag in the roll. Specify the servo motor option at order stage — it cannot be retrofitted easily after delivery.

Yes. All LQ-CRB models include a photoelectric eye registration system that detects printed registration marks on the film and automatically adjusts the feed length to keep the seal and perforation positions aligned with the printed design. This is essential for branded roll bags where logo and text positioning must be consistent across every bag on the roll.

For the most demanding printed film applications — particularly high-speed runs with tight registration tolerances — the servo motor upgrade is recommended over the standard stepping motor for improved accuracy and reduced startup waste.

All four LQ-CRB models are identical in speed, bag length capacity, film thickness range and machine length. The only difference is maximum bag width: 480 mm (CRB-500), 580 mm (CRB-600), 680 mm (CRB-700) and 780 mm (CRB-800).

Select the model whose maximum bag width matches or exceeds your widest required bag format. You can always run narrower bags on a wider model — there is no performance penalty for running a narrower bag on a larger machine. If you produce multiple bag widths, specify the model that accommodates your widest format.

The LQ-CRB series accepts pre-wound flat film rolls as its input — tubular or centre-folded film in the correct width for your bag specification. These rolls can be purchased from a film supplier or produced in-house.

For in-house film production, the recommended upstream sequence is: (1) Blown film machine to extrude and wind HDPE, LDPE or PP film rolls; (2) Optional flexographic printer to add branding before bag making; (3) LQ-CRB machine to convert film into finished bags on a roll. LayerQuestar supplies all three machine types and can configure the complete line as a turnkey solution.