A Complete Garbage Bag Production Line,
Configured for Your Bag Type and Market.

A star seal bottom is formed by sealing the bag base with multiple radiating seal lines rather than a single straight seal across the full width. This distributes load stress across several seal points instead of concentrating it at one line, significantly reducing the risk of the bag splitting under weight. The star seal also allows the bag to open into a round shape that conforms to a round bin — which is why it became the standard for household and retail bin liners worldwide. The LQ-GB2L-350 and LQ-GB2L-400 both produce star seal bags in a dual-lane configuration.

Both machines are dual-lane star seal bag making machines running at up to 220 pcs/min per lane (440 pcs/min combined). The key differences are: the LQ-GB2L-350 handles bag widths up to 300mm and runs standard PE resins (LDPE/HDPE) at 10 kW, weighing 1.8T with a compact footprint of 5.8×1.2×1.65m. The LQ-GB2L-400 handles the same bag width range but adds PBAT biodegradable resin compatibility, runs at 18 kW, weighs 4T and has a larger footprint of 5.8×1.9×1.8m. Choose the LQ-GB2L-350 for standard PE bin liners; choose the LQ-GB2L-400 if you need PBAT compostable compatibility or plan to expand into biodegradable bag production.

Yes, the same blown film machine can produce film for both bag types since both use LDPE or LLDPE resins. However, drawstring bags typically require thicker film (20–50μm for LDPE) compared to star seal bin liners (8–18μm), which means different screw speed settings and output rates. If you plan to run both bag types, confirm the blown film machine's screw diameter and L/D ratio can handle the full thickness range efficiently. LayerQuestar's technical team can advise on the optimal configuration for a mixed-product factory.

It depends on your sales channel. Supermarket private-label bin liners typically require printing — brand name, bag size, bag count and barcode are standard. Pet waste bags almost always require printing since the brand print is the primary margin driver in that category. Industrial and municipal refuse sacks, plain black construction bags and unbranded bulk supply generally do not require printing. If you are unsure, start without a printer and add it when your retail channel requires it — the blown film and bag making stages are independent and a printer can be added to the line later.

LDPE produces soft, flexible film with excellent seal strength and good clarity — it is the standard resin for household bin liners and hotel amenity bags. LLDPE produces tougher film with significantly higher puncture resistance, making it the preferred choice for heavy-duty refuse sacks, construction bags and industrial waste applications. In practice, many factories blend LLDPE into LDPE (typically 20–40% LLDPE) to improve puncture resistance on household liners without sacrificing seal quality. Both resins run on the same blown film machines and bag making machines in the LQ-GB series.

Yes — both the LQ-GB2L-400 and LQ-PG-260 are confirmed PBAT-compatible. PBAT processing requires adjusted temperature profiles and screw speed settings compared to standard LDPE. The melt flow characteristics of PBAT differ from PE, and running PBAT on a machine not configured for it risks thermal degradation and inconsistent seal quality. Buyers targeting regulated markets (EU, Australia, California) should confirm specific process parameters with LayerQuestar's technical team before ordering to ensure the blown film machine screw design is also matched to their specific PBAT resin grade.

The LQ-GB2L-350 and LQ-GB2L-400 both run at up to 220 pcs/min per lane, giving a combined maximum of 440 pcs/min. Under standard 8-hour shift conditions at approximately 80% operational efficiency, the machine can produce an estimated 168,000–190,000 bags per shift. Over a 20-working-day month on a single shift, that equates to approximately 3.4M–3.8M bags per month. Actual output varies depending on bag size, film thickness, resin grade and operator experience. Running two shifts increases monthly output proportionally.

The LQ-PG-260 is purpose-built for small-format roll bags — specifically pet waste bags (dog poop bags) and small biodegradable garbage bags in roll format. It differs from a standard garbage bag machine in three key ways: first, it handles a much narrower bag width (under 235mm) suited to park dispenser and retail roll dimensions; second, it includes an integrated automatic labeling unit, eliminating the need for a separate labeler; third, it supports both coreless and cored roll configurations, which is essential for park dispenser compatibility. It runs at 150–180 pcs/min on PE or PBAT film at 0.008–0.03mm thickness.

Yes. LayerQuestar Machinery supplies bag making machines as standalone units. If you already have a blown film machine, provide your existing film roll specifications — width, thickness range, core diameter and roll weight — and LayerQuestar's technical team will confirm compatibility with the bag machine models and advise on any infeed adjustments needed. Buying the bag machine alone is a common configuration for factories that already have blown film capacity and are adding a new bag format to their product range.

As a general reference: production lead time is typically 60–90 days after order confirmation, sea freight transit is 15–35 days depending on destination port, and on-site installation and commissioning takes approximately 7–14 days. Total time from order to first production run is typically 90–130 days. [NEEDS CLIENT VERIFICATION — confirm current lead times with LayerQuestar directly, as production schedules vary by order volume and season.] Contact LayerQuestar at info@layerquestar.com for a current lead time estimate specific to your configuration and destination.