Twin-Head Garbage Bag Film Production Machine

The Twin-Head Garbage Bag Film Production Machine uses one single extruder connected to a dual-channel diversion system and two die heads to produce two polyethylene film streams simultaneously. It is designed for efficient, narrow-width film production utilized in garbage bags and general-purpose plastic bag applications. The integrated production line combines extrusion, film blowing, air cooling, haul-off, and dual winding. With a specified output of 10–25 kg/h and individual film lay-flat widths of 100–254 mm, it supports small-to-medium format film production. Resin grade, target film thickness, width, and final roll specifications determine the optimal machine configuration.

Dual Film Streams
Two die heads fed by a single extrusion system produce two film streams simultaneously. This layout optimizes output for production schedules requiring two narrow-width film rolls concurrently.

Independent Winding Management
Each production line features its own independent haul-off and winding unit. While the primary extrusion rate is governed by the shared extruder, the individual film winding tension and roll handling can be managed according to the selected configuration and target roll format.

Integrated Equipment Layout
The extrusion, cooling, haul-off, and winding sections are compactly combined into a single machine footprint. This streamlined design optimizes factory floor space utilization for film converting operations.

Garbage Bag Film
Suitable for producing polyethylene film intended for household garbage bags, commercial waste liners, and related waste collection formats within the specified working parameters.

Shopping and T-Shirt Bags
The machine is capable of producing compatible narrow-width tubular film for retail shopping bags, T-shirt bags, and flat bags, subject to the selected resin grade and film dimensions.

Film Rolls for Bag Making
The dual-winder setup supplies uniform film rolls directly for downstream bag-making and sealing equipment. Roll width, diameter, winding tension, and film thickness must align with conversion equipment requirements.
 

Resin Selection
LDPE is the specified standard processing material. The utilization of HDPE, LLDPE, recycled polyethylene, or custom polymer blends requires prior technical confirmation to verify thermal and extrusion compatibility.

Film Width and Thickness
The standard single-stream film width range is 100–254 mm, with a single-side film thickness range of 0.008–0.15 mm. Final width and thickness must match the target finished bag dimensions and selected resin melt strength.

Film Consistency
Bubble stability, gauge uniformity, and consistent winding tension are critical for downstream bag conversion. Resin melt index, extrusion temperatures, cooling airflow, and haul-off speed must be properly coordinated during setup.

Winding and Roll Changing
Advanced double-winder mechanisms and automatic roll-changing devices can be integrated based on specific roll format requirements and production efficiency goals.

Material Feeding
An automatic material loader and PLC-controlled electronic weighing/dosing system can be added to streamline resin handling and mixture consistency.

Film Processing
Optional accessories such as a rotary die, corona treatment unit, and manual/hydraulic screen changers are available depending on specific application demands, downstream printing, or converting requirements.

Confirm Bag Dimensions: Determine the finished bag width, length, and required lay-flat dimensions to establish the proper die size and film width parameters.

Define Resin and Thickness: Specify the exact resin grade, target thickness in microns, and any blended or recycled content to ensure thermal compatibility.

Calculate Required Output: Estimate hourly film consumption based on targeted bag production volume, film weight, and operating hours, matching it against the 10–25 kg/h output capability.

Specify Roll Format: Confirm target roll width, maximum roll diameter, core size, and unwinding direction to ensure seamless compatibility with downstream bag-making machinery.

Extrusion and Cooling
The single extruder melts and pumps the polymer melt through the diversion system to the two die heads. Controlled air rings ensure stable bubble cooling before the film is drawn upward by the haul-off units.

Winding and Bag Conversion
Finished rolls transfer smoothly into conversion machinery. Roll dimensions, core sizes, and winding directions must be coordinated with the downstream sealing and cutting equipment.

Factory Installation
Verify factory floor space, ceiling height clearances, electrical power availability, ventilation, and material flow pathways prior to equipment delivery and installation.

Equipment Configuration: Custom winding setups, specialized automation feeders, and auxiliary film treatment accessories can be incorporated upon request.

Film Specifications: Tailored machine setups can be engineered to accommodate specific resin grades, target output rates, and unique roll dimensions.

Technical Coordination: All custom options, auxiliary integration, and electrical standard adaptations are subject to final engineering review and confirmation of technical compatibility.

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