Blown film

Blown Film

Blown film is a popular method in the packaging industry for creating thin plastic films. This process involves melting plastic pellets and extruding them through a circular die. The melted plastic forms a tube, which is then inflated to create a bubble.

How Blown Film Works

The process starts with plastic pellets being fed into an extruder. The extruder heats and melts the pellets, turning them into a molten state. This molten plastic is then pushed through a circular die, forming a tube.

Inflation and Cooling

Once the tube is formed, air is blown into it, creating a bubble. This bubble is stretched and thinned to the desired film thickness. The film is then cooled and flattened by passing through rollers.

Applications of Blown Film

Blown film is used in various packaging applications. Common uses include plastic bags, shrink wrap, and stretch film. It is valued for its strength, flexibility, and clarity.

Advantages of Blown Film

Blown film offers several benefits. It allows for the production of films with uniform thickness. The process is also efficient and cost-effective. Additionally, blown film can be produced in a range of sizes and thicknesses.

Conclusion

Understanding blown film is essential for anyone involved in packaging. This versatile method produces high-quality plastic films used in many applications. Its efficiency and adaptability make it a cornerstone of the packaging industry.