Nine Layer Co Extruded Stretch Film

1. Product introduction

In the modern packaging industry, nine-layer co-extruded stretch film, as a high-performance packaging material, is playing an increasingly important role. With its unique structure and excellent performance, it is widely used in many fields such as food, medicine, electronics, etc., to meet the strict requirements of different products for packaging.

2. Structural characteristics

1) Multi-layer co-extrusion technology

Nine layers of different polymer materials are precisely combined using advanced co-extrusion technology. Each layer has its specific function and works together from the inside out to form an organic whole. For example, the innermost layer may be in direct contact with the packaged item, has good heat sealing and chemical stability, and can prevent chemical reactions between the contents and the packaging film; The intermediate layer can provide mechanical strength and barrier performance, such as the gas barrier layer can effectively block the penetration of oxygen, carbon dioxide and other gases, and the water barrier layer can prevent the intrusion of water vapor; The outermost layer usually has abrasion resistance, puncture resistance and other characteristics to protect the packaging film from external physical damage during transportation and storage.

2) Precise layer thickness control

With advanced equipment and processes, the thickness of each layer can be precisely controlled. This precision ensures that each layer is fully functional while avoiding material waste. For example, for product packaging with extremely high barrier performance requirements, the gas barrier layer can maintain the most economical thickness under the premise of meeting the barrier requirements, which both ensures the packaging quality and reduces the cost.

3. Performance advantage

1) Excellent barrier performance

Gas barrier

The nine-layer co-extruded stretch film has excellent barrier ability to oxygen, nitrogen and other gases. In food packaging, it can effectively extend the shelf life of food. For example, for foods such as potato chips that are prone to oxidation and deterioration, the stretching film can maintain the oxygen content in the package at a very low level, prevent potato chips from oxidizing and stale, and maintain their freshness and taste.

Water vapor barrier

It stops the passage of water vapor very well. In terms of drug packaging, for those drugs that are sensitive to humidity, such as some capsules and tablets, the nine-layer co-extruded stretch film can prevent water vapor from entering the package, ensure the quality of the drug is stable, and prevent the drug from being spoiled by moisture.

2) Mechanical properties

High strength

It has high tensile strength and puncture resistance. In the transportation process, even if the packaging is subjected to a certain squeeze, collision, it is not easy to break. For example, when packaging electronic products with sharp shapes such as mobile phone chargers, it can effectively resist the puncture of the product on the packaging film and protect the integrity of the product.

Good flexibility

At the same time, it also has good flexibility and is convenient for packaging operation. Can easily fit on the surface of different shapes of products, whether square, round or irregular shape of products, can achieve tight packaging, reduce the gap in the package, improve packaging efficiency.

3) Heat sealing performance

Good heat sealing performance, able to achieve strong heat sealing at low temperatures and pressures. This not only saves energy, but also ensures the reliability of the packaging seal. In the high-speed packaging production line, the heat sealing process can be quickly and stably completed to improve production efficiency.

4. Application field

1) Food packaging

In the food industry, nine-layer co-extruded stretch film is widely used in the packaging of meat, dairy products, snack food, etc. For meat packaging, it can maintain the color and freshness of the meat; For dairy products, it can prevent spoilage and loss of nutrients; Snack foods such as nuts and candies benefit from their good moisture and oxidation resistance.

2) Pharmaceutical packaging

Pharmaceutical products have high requirements for the safety and stability of packaging. The nine-layer co-extruded stretch film can be used for the primary packaging of drugs, such as the blister packaging of tablets and capsules, as well as the outer packaging of syringes and infusion bags, etc., to ensure the quality of drugs during storage and transportation.

3) Electronic packaging

Electronic components are very sensitive to static electricity, moisture and physical damage. The barrier properties and antistatic properties of the nine-layer co-extruded stretch film (through the addition of special layers) make it an ideal choice for the packaging of electronic components, circuit boards and other products, and can effectively protect the performance of electronic equipment.

5. Environmental protection features

The nine-layer co-extruded stretch film is usually made of recyclable or degradable polymer materials, which meets the requirements of modern society for environmentally friendly packaging. Compared with traditional multi-layer composite packaging materials, it reduces the use of chemicals such as glue in the production process and reduces the risk of pollution to the environment. And in the recycling after use, it also has more advantages and can be better integrated into the circular economy system.

6. FAQ

What is a nine-layer co-extruded stretch film?

Nine-layer co-extruded stretch film is a multi-layer composite film that combines nine layers of plastic materials with different functions through a co-extrusion process to provide high barrier properties and other protective properties.

What are the main materials of nine-layer co-extruded stretch film?

The main materials include PP (polypropylene), EVOH (ethylene-vinyl alcohol copolymer), PA (polyamide), PE (polyethylene), etc. These materials provide different barrier and protection properties according to the need.

How is the high barrier property of nine-layer co-extruded stretch film achieved?

By adding high barrier materials such as EVOH into the film structure, and optimizing the interlayer structure, the high barrier effect on oxygen, moisture, odor, etc.

Is nine-layer co-extruded stretch film environmentally friendly?

Yes, the nine-layer co-extruded stretch film does not contain harmful substances, can be recycled, and meets environmental requirements.

What is the stretch forming process of nine-layer co-extruded stretch film?

Steps such as preheating, thermoforming, filling, coding, capping film, heat sealing and scuttling are included to ensure the quality and suitability of the film.

How cost effective is nine-layer co-extruded stretch film?

Compared with traditional packaging materials such as glass and metal, nine-layer co-extruded stretch film provides the same protective properties while having a cost advantage.

What is the shelf-life extension effect of nine-layer co-extruded stretch film?

Due to its high barrier property, it can effectively extend the shelf life of food and other products and reduce the use of preservatives.

What is the strength and toughness of the nine-layer co-extruded stretch film?

Through special process and material selection, the nine-layer co-extruded stretch film has high tensile strength and good toughness, suitable for various packaging needs.

Is the nine-layer co-extruded stretch film resistant to high and low temperatures?

Yes, depending on material selection and formulation adjustment, the nine-layer co-extruded stretch film can be adapted to different temperature ranges and is suitable for refrigerated and frozen food packaging.

Is the nine-layer co-extruded stretch film easy to process?

Yes, the nine-layer co-extruded stretch film has good processing adaptability and is easy to perform thermal forming, printing and cutting.

How transparent is the nine-layer co-extruded stretch film?

Depending on the material and process, the nine-layer co-extruded stretch film can offer a variety of transparency options from transparent to opaque.