EXTRUTEX EX-LH Series High-Speed Automatic LDPE/LLDPE Blown Film Line

High-Output Monolayer Polyethylene Film Extrusion Equipment

The EXTRUTEX EX-LH Series High-Speed Automatic LDPE/LLDPE Blown Film Line is designed for manufacturers seeking efficient, consistent, and flexible production of polyethylene film. Developed for high-output monolayer film extrusion, the series is suitable for processing low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE) into film with good flexibility, clarity, gloss, and practical performance for a wide range of packaging applications.

With six model configurations, screw diameters from 55 mm to 120 mm, reference film layflat widths from 1,000 mm to 3,000 mm, and stated extrusion capacities from 120 kg/h to 450 kg/h, the EX-LH Series provides options for different production scales. It can be considered for agricultural film, industrial film, shrink film, barrier-film structures where suitable, garment bags, plant bags, laundry bags, shopping bags, and garbage bags.

Designed with a focus on production efficiency, stable extrusion, film quality, and ease of operation, the EX-LH Series supports manufacturers looking to expand production capacity or establish a dedicated polyethylene film production line. The final machine configuration should be selected according to the required film dimensions, resin grades, output target, and downstream converting process.

1. Product Overview

The EXTRUTEX EX-LH Series is a monolayer blown film extrusion line. In the blown film process, polyethylene resin is melted and homogenized inside a heated extruder barrel before being delivered through a circular die. Air inflates the emerging tube into a film bubble, which is cooled, drawn through the haul-off system, flattened, and wound into rolls.

The resulting film can be used directly or supplied to downstream converting equipment for bag making, packaging, or other suitable applications. Depending on the selected resin grade and production conditions, LDPE and LLDPE can provide different balances of flexibility, toughness, clarity, gloss, and sealing performance.

The EX-LH Series includes six models to accommodate a range of film widths and production targets. Customers can select a machine based on their product specifications, available factory space, material requirements, and expected production volume.

Key Features

• High-output production options: Six models with stated capacities from 120 kg/h to 450 kg/h.
• Wide film formats: Reference layflat widths from 1,000 mm to 3,000 mm.
• LDPE and LLDPE processing: Designed for suitable grades of these widely used polyethylene materials.
• Monolayer extrusion: Produces single-layer film for applications that do not require a multilayer extrusion structure.
• Flexible film properties: Film clarity, gloss, flexibility, strength, and sealing behavior depend on the selected resin and process settings.
• Multiple product applications: Suitable for evaluating production requirements across agricultural, industrial, and flexible packaging film markets.
• Model selection flexibility: Different screw diameters and working widths support different production targets.
• Downstream integration: Film rolls can be supplied to compatible bag-making, cutting, sealing, or other converting equipment.

2. Technical Specifications

The following table summarizes the reference specifications of the EXTRUTEX EX-LH Series High-Speed Automatic Blown Film Line.

Technical note: The figures above are reference specifications supplied for the series. Actual output and achievable film thickness depend on resin grade, film width, die design, formulation, cooling conditions, operating speed, and other process parameters. The stated maximum capacity and the full thickness range may not be achievable simultaneously. Confirm the final configuration and performance requirements with EXTRUTEX before ordering.

3. Model Selection and Production Capacity

EX-LH55 Blown Film Line

The EX-LH55 features a 55 mm screw diameter, a reference layflat width of 1,000 mm, and a stated extrusion capacity of 120 kg/h. It is the entry model in the EX-LH range and can be considered for medium-scale LDPE and LLDPE film production where this working width meets the customer's requirements.

EX-LH65 Blown Film Line

The EX-LH65 uses a 65 mm screw and supports a reference layflat width of 1,300 mm, with a stated output of 160 kg/h. It offers a wider film format and higher nominal capacity than the EX-LH55.

EX-LH75 Blown Film Line

The EX-LH75 features a 75 mm screw diameter, a 1,600 mm reference layflat width, and a stated output of 220 kg/h. It is an option for manufacturers requiring a higher production rate and wider film rolls for their target applications.

EX-LH85 Blown Film Line

The EX-LH85 has an 85 mm screw diameter and a reference layflat width of 2,000 mm. With a stated extrusion capacity of 300 kg/h, it is intended for production requirements that call for wider film and increased output.

EX-LH100 Blown Film Line

The EX-LH100 features a 100 mm screw diameter, a reference layflat width of 2,500 mm, and a stated capacity of 380 kg/h. This model can be evaluated for larger-volume film manufacturing operations, subject to the required material, thickness, and production conditions.

EX-LH120 Blown Film Line

The EX-LH120 is the largest model in the series, with a 120 mm screw diameter, a reference layflat width of 3,000 mm, and a stated extrusion capacity of 450 kg/h. It is designed for customers whose production plans require the widest film format and highest stated capacity within the EX-LH range.

4. Processing LDPE and LLDPE

LDPE — Low-Density Polyethylene

LDPE is widely used for flexible packaging films because it can provide softness, flexibility, and good processability. Depending on the grade and formulation, LDPE film may offer useful clarity, gloss, and heat-sealing behavior. It is commonly considered for bags, liners, packaging film, and selected agricultural applications.

LLDPE — Linear Low-Density Polyethylene

LLDPE is often selected when toughness, tensile performance, and puncture resistance are important. Depending on the grade, it may be processed alone or blended with suitable polyethylene materials to achieve the desired film properties. The formulation must be matched to the extrusion line and final product requirements.

The correct resin selection depends on the intended application. Factors such as melt flow characteristics, density, film thickness, sealing temperature, transparency, mechanical performance, and environmental conditions should be considered before production. EXTRUTEX can help customers define the equipment configuration around their target resin and film specifications.

5. Film Quality and Process Control

Producing consistent polyethylene film requires coordinated control of the extrusion and film-forming process. The screw and barrel melt and homogenize the polymer, while the die distributes the melt into a tubular shape. Bubble inflation, cooling, haul-off, and winding then influence the final film dimensions and appearance.

Film Thickness Consistency

Uniform film thickness is important for material efficiency, bag quality, and downstream converting. Resin consistency, die condition, melt temperature, bubble stability, cooling, and haul-off speed all influence thickness. The actual achievable tolerance should be established according to the machine configuration and product specification.

Clarity and Gloss

Film clarity and surface gloss depend on the resin grade, additives, melt processing, cooling conditions, and film thickness. Appropriate material selection and stable operation can help manufacturers target the appearance required for their packaging products.

Bubble Stability

A stable film bubble supports consistent width and thickness. Cooling airflow, extrusion output, inflation conditions, and haul-off speed must be adjusted together. Operators should follow the recommended setup procedure for the selected material and product dimensions.

Winding Quality

Proper winding helps maintain usable film rolls for storage and downstream converting. Winding tension, roll alignment, and the condition of the haul-off and winding systems should be checked during operation to reduce wrinkles, telescoping, or other roll-quality problems.

6. Applications of the EX-LH Series

Agricultural Film

Suitable LDPE and LLDPE grades can be used for certain agricultural film products, including covers and protective films. Requirements vary with film thickness, strength, light transmission, weather exposure, and intended service life. Specialized agricultural films may require additives or multilayer structures that are outside the standard monolayer configuration.

Industrial Film

Polyethylene industrial film can be used for protective wrapping, liners, covering materials, and selected general-purpose packaging products. The required film strength and thickness depend on the product being protected and the conditions during transport, storage, and use.

Shrink Film

Appropriate polyethylene formulations may be used for selected shrink-film applications. Shrink performance depends on resin formulation, film orientation and processing history, and the requirements of the packaging process. Customers should confirm that the chosen material and monolayer structure are suitable for the intended shrink application.

Barrier Film Applications

Polyethylene can serve as a moisture-resistant or sealing layer in packaging structures. However, applications requiring high oxygen, aroma, or other specialized gas barriers may need dedicated barrier materials or multilayer co-extrusion. The standard EX-LH Series is a monolayer line and should not be assumed to produce a complete high-barrier multilayer film by itself.

Garment Bags

LDPE and LLDPE film can be converted into garment bags and protective covers for clothing storage, retail, and transportation. Film dimensions, transparency, softness, and sealing requirements should be specified according to the garment type and packaging method.

Plant Bags

Polyethylene film can be used for suitable plant bags and related horticultural packaging products. The correct formulation and film thickness depend on the required flexibility, durability, and intended use.

Laundry Bags

Film produced by the EX-LH Series can be considered for laundry bags and similar packaging products. Bag size, material performance, and compatibility with the downstream sealing and cutting equipment should be confirmed during project planning.

Shopping Bags

LDPE and LLDPE film is widely used in shopping bags where flexibility, strength, and sealing performance are required. The produced film rolls can be supplied to a compatible bag-making machine for cutting, sealing, and bag formation.

Garbage Bags

Polyethylene film can be converted into garbage bags for household, commercial, and industrial use. Resin grade, film thickness, bag dimensions, and required load-bearing performance should be selected according to the intended application.

7. Integration with Downstream Equipment

A blown film line is generally one part of a complete film-converting process. After extrusion, the film is flattened and wound into rolls, which can then be transferred to compatible bag-making, cutting, sealing, printing, or other downstream equipment, depending on the final product.

When planning a production line, customers should consider the maximum roll width, roll diameter, winding arrangement, required film thickness, and the capabilities of the downstream machinery. Matching the film extrusion line to the converting process can help reduce handling problems and improve overall production planning.

8. How to Choose the Right Blown Film Line

To select the most appropriate EX-LH model, manufacturers should assess the following factors:

• Film width: Identify the required layflat width and confirm how it relates to the finished film or bag dimensions.
• Film thickness: Specify the target thickness and the acceptable variation for the intended product.
• Resin type: Confirm the LDPE or LLDPE grade and whether a blend or additive package will be used.
• Production target: Estimate the required output per hour or shift and compare it with the reference capacity.
• Application: Define whether the film will be used for bags, agricultural products, industrial wrapping, shrink packaging, or another purpose.
• Downstream equipment: Check compatibility with bag-making, printing, cutting, sealing, and winding requirements.
• Factory conditions: Confirm available installation space, electrical supply, ventilation, cooling arrangements, and maintenance access.
• Future expansion: Consider whether the production plan may require higher capacity or additional extrusion capabilities later.

9. Installation, Operation, and Maintenance

Proper installation and preventive maintenance help support stable production and equipment reliability. Before commissioning, the machine foundation, electrical supply, grounding, heating systems, cooling arrangements, and safety devices should be checked by qualified personnel.

During production, operators should monitor temperature settings, motor load, bubble stability, film thickness, haul-off speed, and winding tension. Process adjustments should be made according to the material supplier's recommendations and the machine operating instructions.

Routine maintenance should include checking heaters and temperature sensors, inspecting drive components, cleaning components according to the manufacturer's procedures, and checking cooling, haul-off, and winding systems. Safety procedures must be followed around hot surfaces, rotating equipment, moving film, and nip points. Installation, operation, and maintenance should be performed by trained personnel.

10. Frequently Asked Questions

What materials can the EX-LH Series process?

The series is specified for LDPE and LLDPE. The exact resin grade and processing window should be confirmed before production.

What is the maximum stated output?

The EX-LH120 has a stated extrusion capacity of 450 kg/h. Actual output depends on the material, film thickness, film width, die configuration, and operating conditions.

What film widths are available?

The reference layflat widths range from 1,000 mm for the EX-LH55 to 3,000 mm for the EX-LH120.

Can this line produce multilayer barrier film?

The EX-LH Series is a monolayer line. Specialized multilayer barrier film generally requires a suitable co-extrusion configuration and compatible barrier materials.

Can the line produce film for shopping and garbage bags?

Yes, suitable LDPE and LLDPE film can be used for these applications. Final performance depends on resin selection, film thickness, bag design, and downstream converting conditions.

How do I select the correct model?

Provide your required film width, thickness, resin grade, target output, application, and downstream equipment details so EXTRUTEX can help determine a suitable configuration.

11. Request a Quotation from EXTRUTEX

The EXTRUTEX EX-LH Series High-Speed Automatic LDPE/LLDPE Blown Film Line offers six model options for manufacturers requiring monolayer polyethylene film production at different widths and output levels.

To request a quotation, please provide the following information:

• Preferred model or required film width
• LDPE or LLDPE resin grade
• Target film thickness
• Required production capacity
• Film application and finished product details
• Downstream bag-making or converting equipment
• Factory location and electrical supply requirements

Contact EXTRUTEX to discuss your production requirements, confirm technical specifications, and request a quotation for the EX-LH Series blown film extrusion line.

EXTRUTEX — Austrian design, with manufacturing in China and design, laboratory, and R&D capabilities in Austria.