What types of films are suitable for ABA blown film machine to produce

1、 Overview of ABA blown film machine

ABA blown film machine is a special structure plastic film production equipment, named after its three-layer co extrusion structure (A-B-A), which means that the inner and outer layers are made of the same or similar materials (A layer), and the middle layer is made of different materials (B layer). This structural design endows the ABA blown film machine with unique advantages, enabling it to produce a variety of high-performance composite films, which are widely used in packaging, agriculture, medical and other fields.

The working principle of ABA blown film machine is to melt different materials through three independent extruders, and then form concentric cylindrical thin film bubbles through co extrusion die heads. The thin film is then produced through processes such as blowing, cooling, pulling, and winding. This structure not only improves production efficiency, but also achieves performance combinations that cannot be achieved by a single material.

2、 ABA blown film machine is suitable for producing the main types of films

1. Barrier film

The ABA blown film machine is particularly suitable for producing films with excellent barrier properties, which are usually used for packaging products that require long-term preservation such as food and medicine.

Oxygen barrier film: EVOH (ethylene vinyl alcohol copolymer) or PVDC (polyvinylidene chloride) is commonly used for the middle layer (B layer), and PE or PP is used for the inner and outer layers (A layer), which can effectively block oxygen permeation and extend the shelf life of food

Water vapor barrier film: The middle layer uses high moisture resistant materials such as PVDC, which is suitable for moisture-proof packaging of dry food, electronic components, etc

Fragrance barrier film: prevents the leakage of fragrance inside the packaging or the infiltration of external odors, commonly used in products such as coffee and tea

2. High strength film

Through ABA structural design, films with excellent mechanical properties can be produced:

Heavy packaging film: The middle layer uses high-strength materials such as nylon or special LLDPE, and the inner and outer layers use ordinary PE, which ensures strength and controls costs

Stretch wrap film: The middle layer is made of highly elastic material, which endows the film with excellent tensile properties and self-adhesive properties

Agricultural greenhouse film: three-layer structure can endow anti ultraviolet, anti-aging and high strength characteristics respectively, with a service life of 3-5 years

3. Functional composite film

The ABA structure provides broad space for the development of functional thin films:

Antibacterial film: The middle layer is coated with antibacterial agents, while the inner and outer layers maintain food contact safety

Anti fog film: The middle layer contains anti fog agent to prevent condensation inside the packaging from affecting product visibility

Anti static film: Intermediate layer with added anti-static agent, suitable for electronic component packaging

Heat sealing film: Different heat sealing materials are used for the inner and outer layers to meet different sealing temperature requirements

4. Environmentally friendly film

With the increasing environmental requirements, ABA blown film machines have also adapted to the trend of green packaging:

Degradable film: The middle layer uses biodegradable materials such as PLA or PBAT, and the inner and outer layers use traditional PE for easy processing

Reduced film: By optimizing the three-layer structure, the material usage is reduced while maintaining performance

Recycled material film: Recycled material is used for the inner and outer layers, and new material is used for the middle layer to ensure key performance

5. Special purpose films

Shrinkage film: Control the shrinkage rate and shrinkage temperature through a three-layer material ratio

Breathable membrane: The middle layer has a microporous structure and is used for hygiene and medical products

Printing base film: The middle layer provides dimensional stability, while the outer layer optimizes printing adaptability

3、 Material combination for producing thin films with ABA blown film machine

The core advantage of ABA blown film machine lies in the flexibility of material selection, and common material combinations include:

PE/Adhesive Resin/EVOH/Adhesive Resin/PE: High Barrier Food Packaging Film

PP/PE/PP: Packaging film that balances heat sealing and rigidity

PE/Nylon/PE: High strength puncture resistant packaging film

PE/Recycled PE/PE: Environmentally friendly packaging film

PE/EVA/PE: Soft and elastic film

The selection of materials should consider the following factors:

Matching of melting temperature of each layer of material

Interlayer adhesion performance

Physical performance requirements for the final film

cost control

machinability

4、 Advantages of ABA blown film machine in producing thin films

Compared to single-layer blown film machines, ABA blown film machines have the following advantages:

Performance optimization: By combining different materials, achieve performance that cannot be achieved by a single material

Cost savings: Expensive functional materials only need to be used for necessary layers (usually intermediate layers)

High production efficiency: One time molding of multi-layer structure, avoiding subsequent composite processes

Flexible design: The film properties can be changed by adjusting the thickness ratio and material of each layer

Stable quality: strong interlayer bonding, without the risk of delamination of traditional composite films

5、 Application fields of ABA blown film machine thin film

Based on the above types of films, the films produced by ABA blown film machines are mainly used for:

Food packaging:

Meat and cheese vacuum packaging

Snack and dried fruit packaging

Liquid packaging (milk, juice)

Frozen food packaging

Medical packaging:

Drug blister packaging

Medical device sterilization packaging

Moisture proof packaging for pharmaceutical intermediates

Industrial packaging:

Anti static packaging for electronic components

Chemical product anti-corrosion packaging

Precision instrument shockproof packaging

Agricultural applications:

agricultural film 

Greenhouse film

Silage feed packaging film

Packaging for daily necessities:

Detergent packaging

cosmetic packaging

Sanitary product packaging

6、 ABA blown film machine selection and precautions for film production

To fully leverage the advantages of ABA blown film machines, attention should be paid to:

Equipment selection:

Select the appropriate die diameter based on the target film width

Consider matching the power and plasticizing capacity of the three-layer extruder

Choose a temperature control system that is suitable for the material characteristics

Process control:

Accurately control the thickness ratio of each layer (usually 5-15% as the barrier layer)

Optimize the inflation ratio and traction ratio to balance the film performance

Adjust the cooling system to ensure good bonding between each layer

Quality Control:

Regularly check the interlayer adhesion strength

Monitor changes in barrier performance

Ensure thickness uniformity

The ABA blown film machine, with its unique three-layer co extrusion structure, can produce a wide range of products from ordinary packaging films to high-performance specialty films. Its core advantage lies in the clever combination of materials science and process technology to achieve "customization" of film properties. With the advancement of material technology and changes in market demand, the application scope of ABA blown film machine will continue to expand, providing more innovative solutions for the plastic film industry. For film manufacturers, choosing a reasonable ABA blown film machine and material combination can enhance product competitiveness and meet increasingly diverse market demands.