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High-Quality Protection: Blown Stretch Film

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In today’s customer-centric world, safeguarding products with top-notch protection is a must. Enter blown stretch film, a flexible and adaptable packaging material that delivers dependable and efficient solutions.

Blown stretch film provides high-quality protection for products through its versatile manufacturing process, properties such as thickness options, stretch characteristics, and puncture resistance, and advantages such as versatility, wrap quality, and cost-effectiveness. Its applications span across various industries, making it an ideal choice for securing and protecting products during transportation and storage. By following best practices for usage and storage, blown stretch film can deliver optimal performance, making it a valuable asset in the packaging industry.

Curious to learn more about this wonder product? This article dives deep into the manufacturing process, unique properties, benefits, versatile applications, and recommended practices of blown stretch film. Whether you’re a curious reader or a packaging pro, this guide packs valuable and practical insights for all.

I. Introduction

Blown stretch film is a type of packaging material used for securing and protecting products during transportation and storage. It is important to understand the different types of stretch films available in the market, including blown stretch film, to make informed packaging decisions.

II. Manufacturing Process of Blown Stretch Film

Blown stretch film is made through a process called extrusion, which involves melting resin pellets and extruding them into a thin film. The extrusion process for blown stretch film is characterized by the resin being melted and forced through a circular die, forming a tubular bubble. The tubular bubble is then cooled and collapsed, creating a flat film that is wound into rolls.

The type of resin used in the manufacturing process plays a critical role in determining the properties of the blown stretch film. Common resins used in blown stretch film production include polyethylene (PE), which is a widely used plastic material known for its excellent stretch and mechanical properties. Low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE) are the most commonly used resins for blown stretch film due to their high strength and flexibility.

III. Properties of Blown Stretch Film

  • Thickness and Gauge Options: Blown stretch film is available in different thicknesses or gauges, ranging from 40 to 120 gauge, to suit different load requirements.
  • Stretch Characteristics and Memory: Blown stretch film has excellent stretch characteristics, allowing it to be stretched and elongated during application and then recover and shrink back to its original shape, ensuring a tight and secure wrap around the load.
  • Puncture Resistance: Blown stretch film offers superior puncture resistance, protecting the wrapped products from damage due to sharp edges or rough handling during transportation and storage.
  • Cling Properties: Blown stretch film has strong cling properties, allowing it to adhere to itself and create a tight seal around the load without the need for additional adhesives or tapes.

IV. Advantages of Using Blown Stretch Film

  • Versatility in Wrapping a Variety of Products: Blown stretch film can be used to wrap a wide range of products, including irregularly shaped loads, making it suitable for various industries and applications.
  • Consistent Wrap Quality: Blown stretch film provides consistent wrap quality, ensuring that the load is securely wrapped and protected from moisture, dust, and other environmental factors.
  • Ability to Handle Irregularly Shaped Loads: Blown stretch film’s excellent stretch characteristics and memory make it ideal for wrapping loads with irregular shapes or sizes, providing stability and preventing load shifting during transportation.
  • Cost-Effectiveness and Durability: Blown stretch film is a cost-effective solution for securing and protecting products, as it reduces product damage and losses, minimizes the need for costly replacements or returns, and can be stretched to cover more area with less material.
PropertyBlown Stretch FilmCast Stretch Film
Tear resistanceHighLow
Puncture resistanceHighLow

V. Applications of Blown Stretch Film

Blown stretch film finds extensive applications in various industries where secure packaging and transportation of products are critical. Some common industries that use blown stretch film include:

  • Manufacturing: Blown stretch film is used to secure and protect finished goods and raw materials in the manufacturing process. It is ideal for packaging products such as appliances, furniture, automotive parts, and electronics, among others.
  • Warehousing and Distribution: Blown stretch film is widely used in warehouses and distribution centers to wrap and secure palletized loads for storage and transportation. It provides stability to stacked pallets, preventing load shifting and reducing the risk of damage during handling and transportation.
  • Logistics and Transportation: Blown stretch film is a preferred choice for transportation companies to secure loads on trucks, trailers, and containers. It ensures that the products are tightly wrapped and protected from moisture, dust, and other environmental factors during transit.
  • Retail: Blown stretch film is commonly used in retail operations for packing and securing products for display, storage, and transportation. It is ideal for wrapping products such as consumer goods, food and beverages, and household items.

VI. Comparison between Blown Stretch Film and Cast Stretch Film

Manufacturing Processes:

Blown stretch film is made through an extrusion process where the resin is melted and extruded into a tubular bubble that is then collapsed and wound into rolls. On the other hand, cast stretch film is made through a casting process where the resin is melted and poured onto a casting roll to form a thin film. The casting process allows for a faster production rate compared to the extrusion process used for blown stretch film.


Blown stretch film generally offers higher puncture resistance, tear resistance, and cling properties compared to cast stretch film. It has better stretch characteristics and memory, making it ideal for securing irregularly shaped loads. Cast stretch film, on the other hand, typically offers higher clarity, smoother surfaces, and quieter unwinding during application.

Pros of Blown Stretch Film:

  • Superior puncture resistance and tear resistance
  • Excellent stretch characteristics and memory
  • Strong cling properties
  • Ideal for securing irregularly shaped loads

Cons of Blown Stretch Film:

  • Lower clarity compared to cast stretch film
  • May have a higher price point compared to cast stretch film
  • Slower production rate due to the extrusion process

Pros of Cast Stretch Film:

  • Higher clarity for better visibility of wrapped products
  • Smoother surfaces for quieter unwinding during application
  • Faster production rate compared to blown stretch film

Cons of Cast Stretch Film:

  • Lower puncture resistance and tear resistance compared to blown stretch film
  • Less stretch characteristics and memory compared to blown stretch film
  • May require additional adhesives or tapes for better load stability

Table : Comparison of blown and cast stretch film properties

ApplicationBlown Stretch FilmCast Stretch Film
Heavy or irregular loadsYesNo
Sharp or pointed objectsYesNo
Outdoor storage or transportationYesNo
High-speed wrapping machinesNoYes
Clear visibility of product labels or barcodesNoYes

VII. Best Practices for Using and Storing Blown Stretch Film

To ensure optimal performance of blown stretch film, it is important to follow best practices for usage and storage, such as:

  • Using the Appropriate Film Thickness for the Load: Selecting the right gauge or thickness of blown stretch film based on the weight, shape, and fragility of the load to be wrapped. Heavier loads may require thicker films for added strength and stability.
  • Properly Applying Stretch Film: Applying the stretch film with the correct tension and overlapping layers to ensure a tight and secure wrap around the load. Avoiding overstretching, as it can cause film thinning and reduce its effectiveness.
  • Avoiding Sharp Edges: Taking precautions to avoid sharp edges on the load or the wrapping equipment, as they can puncture the film and compromise its integrity.
  • Storing Stretch Film Properly: Storing the stretch film in a dry and cool environment, away from direct sunlight, extreme temperatures, and moisture to prevent degradation and maintain its performance.
  • Training Operators: Properly training and educating operators on the correct usage and handling of blown stretch film to ensure consistent application and maximize its benefits.

By following these best practices, users can ensure that blown stretch film performs optimally, providing effective load containment and protection during transportation and storage.

Embrace the benefits of blown stretch film for high-quality protection of your products. With its versatile manufacturing process, properties, advantages, and applications, blown stretch film offers reliable and efficient packaging solutions for the customer-oriented packaging industry. Don’t miss out on the valuable insights shared in this article!

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