The Dual-Line Polyethylene Film Extrusion Machine produces two polyethylene film outputs through a twin-head blown film system with one screw extruder. It is suitable for narrow-width film used in shopping bags, T-shirt bags, garbage bags and flexible packaging. The system integrates extrusion, two die heads, cooling, haul-off and winding. Configuration is based on resin grade, film dimensions, output requirements and downstream bag-making specifications. Custom options can be selected according to the required production process.
Key Advantages
Dual Film Output
Two die heads form separate film outputs within one machine setup. This arrangement suits production runs involving narrow-width film and standard bag formats.
Compact Equipment Layout
The twin-head configuration combines two film-forming positions in one production system, helping make efficient use of available factory space.
Application-Based Configuration
Film dimensions, winding requirements and auxiliary equipment can be matched to the intended product range and converting process.
Integrated Film Processing
Extrusion, bubble cooling, haul-off and winding work as connected stages. Correctly matched settings help maintain stable film formation and consistent roll handling.
Technical Specifications
|
Parameter |
Specification |
|
Machine Type |
Twin-Head Blown Film Machine |
|
Extruder Configuration |
1 Screw Extruder, 2 Die Heads |
|
Applicable Material |
LDPE |
|
Film Width |
100–254 mm |
|
Film Thickness |
0.008–0.15 mm |
|
Output |
10–25 kg/h |
|
Screw Diameter |
40/45 mm |
|
Screw L/D Ratio |
30:1 |
|
Screw Material |
38CrMoALA |
|
Main Motor Power |
7.5 kW |
|
Die Diameter |
45 mm |
|
Cooling Fan Power |
1.1 kW |
|
Winding Device Size |
300 mm |
|
Power Supply |
220 V, 60 Hz, 3 Phase |
|
Machine Weight |
1,900 kg |
|
Overall Dimensions |
2,800 × 2,400 × 2,800 mm |
Film Materials and Applications
Shopping and T-Shirt Bags
Suitable film specifications can be assessed against bag width, thickness, cutting method and the feeding requirements of the bag-making machine.
Garbage Bags
Film thickness, resin formulation and roll dimensions should match the required bag size, sealing process and finished-product specifications.
Flexible Packaging Film
Narrow polyethylene film can support selected packaging applications where the required material properties and film dimensions are compatible with the equipment.
Resin Compatibility
LDPE is specified for the standard configuration. HDPE, LLDPE and recycled polyethylene require technical confirmation based on material composition, processing conditions and screw configuration.
Production Configuration
Extrusion System
The screw and barrel melt and convey the resin to the two die heads. Screw dimensions, temperature settings and processing conditions must suit the selected material and target output.
Twin-Head Die System
The two die heads form separate film bubbles. Die dimensions and operating settings determine the achievable film range. Required film widths should be confirmed for the selected setup.
Cooling and Haul-Off
Cooling airflow and haul-off speed influence bubble stability, film formation and thickness consistency. Settings should be established through production trials using the intended resin.
Winding System
The winding system collects the finished film into rolls for downstream converting. Roll dimensions, winding tension and handling requirements should be specified before configuration.
How to Select the Right Configuration
Define Film Dimensions
Specify the required width and thickness for each output. Include target roll diameter and winding width to ensure compatibility with the next production stage.
Confirm Output Requirements
State the required hourly output and production schedule. Actual output depends on material, film dimensions, die configuration and operating conditions. Confirm the rated output basis before comparing capacity.
Identify Resin Grades
Provide the resin grade, blend and additives. Recycled content should also be stated when applicable, as it may affect processing conditions and equipment suitability.
Check Factory Conditions
Confirm available floor space, power supply, ventilation and cooling requirements. Installation dimensions and electrical specifications should be checked before final approval.
Customization Options
Extrusion and Die Setup
Screw specifications and die dimensions can be reviewed against the required material and film range.
Cooling and Winding
Cooling components and winding arrangements can be assessed according to film dimensions, roll format and production requirements.
Auxiliary Equipment
Available options include a rotary die, double winder, automatic roll change, corona treatment, screen changer, automatic loader and PLC-controlled electronic weighing. Selection depends on the required process and confirmed equipment compatibility.
Electrical Configuration
Voltage, frequency, phase and control requirements should be confirmed for the installation location and recorded in the approved technical specification.
Quality Control and Delivery
Assembly Inspection: Mechanical assembly, electrical connections and operating functions should be checked against the approved equipment specification.
Trial Operation: Agree on the resin grade, film dimensions, operating conditions and acceptance criteria before testing. Trial results can be reviewed against the specified production requirements.
Export Preparation: Confirm the equipment scope, packing method, shipping terms, required documentation and delivery schedule in the order documents.
Technical Support: Installation guidance, operating instructions, warranty coverage and technical assistance should be defined in the agreed service terms.
Frequently Asked Questions
Q: What materials can the machine process?
A: The listed configuration specifies LDPE. Other polyethylene grades and recycled formulations require technical confirmation before selection.
Q: Can the two outputs have different film widths?
A: This depends on the die-head design and available adjustments. Confirm the permitted width range and operating arrangements for both outputs.
Q: What determines the actual output?
A: Resin properties, film width, thickness, die configuration, cooling and operating speed all affect production output. Confirm the rated capacity and test conditions for the selected setup.
Q: Can the machine be customized?
A: Yes. Extrusion specifications, die dimensions, winding arrangements, auxiliary equipment and electrical requirements can be assessed against the intended application.
Q: What information is needed for a quotation?
A: Provide the resin grade, target film width and thickness, required output, roll dimensions, application and local power supply. Include any auxiliary equipment requirements to support an accurate configuration proposal.
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