4 Common Shrink Film Problems & How to Fix Them 

Shrink films are flexible packaging materials that rely on two things: the right shrink film and the heat source. A simple wrap and heat can make your packaging weatherproof, tamperproof and waterproof, protecting the bulky items. However, if you want to use a shrink film, you must have come across some common issues like torn seals, burn holes, wrinkles or at times the use of excessive film. So, how to solve shrink film problems? Let’s find out!

How to Properly Use a Shrink Film? 

A shrink film or wrap is a versatile packaging solution used in various industries, including food & beverages, consumer goods and electronics. However, it is crucial to use shrink films correctly to make the most out of them. 

• Simply roll the shrink film and place the item in the centre.
• Ensure the film is tight and wrinkle-free
• Now, take a heat gun or a machine and move the evenly close to the film to avoid uneven shrinkage or damage. 
• Allow the package to cool down for the film to set properly 

4 Common Shrink Film Problems & How to Fix Them 

Wrinkles & Creases 

Wrinkles and creases appear when the shrink wrap is not applied evenly or if the film is excessive for the product wrapped. This can lead to folds in the film, making your packaging look untidy & unprofessional. 

Causes: 

• Choosing the wrong film size (using too much or too little)
• Uneven heat distribution in the shrinking process

Solution:

• Selecting the Right Size Film: The film should perfectly fit the item to be wrapped with little excess. It should not be excessive, as it could cause wrinkling. 
• Uniform Heat: Make sure the heat applied is even across the packaging by adjusting the shrink tunnel temperature. 

Burnt Holes 

Burn holes in shrink wrap happen when the material is exposed to excessive heat. This causes the films to melt or burn, which could compromise the protective barriers of the film and damage the product during transit. 

Causes: 

• Overheating the film during the shrinkage process 
• Uneven heat distribution in the shrinkage or sealing region 

Solution: 

• Proper Heat Temperature: Reduce the temperature settings to prevent the film from burning or melting. 
• Heating Equipment: Monitor your heating equipment to ensure it is working properly. 

Uneven Shrinkage 

This happens when the shrink wrap shrinks unevenly, meaning in some places more than in other areas. Uneven shrinkage makes the package look unappealing and unprofessional while also compromising the integrity of the packed item. 

Causes: 

• Uneven heat distribution during the shrinkage process
• Selecting the incorrect film size
• Improper use of the heat source 

Solution: 

• Adjust Heat Distribution: The heat source should be evenly distributed by adjusting the position of the equipment. 
• Reduce Conveyor Speed: Slow down the speed of the conveyor speed for even shrinkage around the products. 

Dog Ears 

These rectangular flaps that are excessively film forming on the corners of the wrapped item. While some warehousing or distributors may not see this as a major issue, however failure to wrap the edges properly can lead to tearing during transit. 

Causes:    

• Excessive film at the edges
• Incorrect position of the shrink wrapping machine 

Solution: 

• Remove the Excess Film: Make sure you use the right size shrink film with minimal edges around the wrapped item. 
• Adjust Equipment Setting: Ensure to adjust the setting of the shrink wrap machine for even corners and edges.

Shrink wrap packaging is an effective and versatile packaging solution to protect products from damage during handling, storage or transit. By keeping these tips in mind, one can ensure a seamless packaging for beverages, food packaging, pharmaceutical, machinery & equipment, & other industrial applications. At Shree Pragya Flexifilm Industries, we provide assistance to help you choose the right shrink film for your application. As a trusted PE Shrink Film Manufacturer in India, we offer customization in terms of film thickness, colour, width, as well as VCI, antistatic and UV protection films. Embrace secure and seamless packaging with Shree Pragya Flexifilm Industries. Call us to discuss your packaging needs.