Frequently Asked Questions - Heat Shrinkable Tapes & Tubing

What should my taping tension be?

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Most users apply a force between 5 and 8 lbs. when taping. Regardless of your specific taping tension, it is crucial to maintain consistent and even tension throughout the process. Fluctuations in tension can lead to variations in compaction force, resulting in visual defects on the part surface and potential porosity issues within the composite layers. There are two methods for applying tape: by hand or using automated equipment. When taping by hand, a good rule of thumb is to keep the tape snug against the part surface, avoiding any loose wraps. This practice will yield a clean, consistent surface once the tape is removed. Automated equipment simplifies maintaining consistent and precise tension, as it handles this task for you. For more details on variables that affect compressive force, please refer to the relevant page or contact us with any questions about taping tension and adjustments to improve part quality.

Shrink film is a clear material used for wrapping various packages. When exposed to heat via a shrink tunnel or heat gun, this film shrinks, providing a tight and immaculate seal for packages. Shrink wrap offers tamper resistance and protection for perishable items on retail shelves, among many other applications. It is often referred to as shrink wrap or stretch film, although stretch film is a different packaging product altogether. Be sure to check our Stretch Film FAQs as well!

HOW DO I KNOW WHAT SIZE SHRINK FILM TO USE?

Many variables determine the ideal width of shrink film for your needs. Purchasing the incorrect width can lead to increased breakage and sealing issues. Selecting the right shrink film is crucial for optimal sealing and shelf appeal.

First, consider the shrink film equipment you are using, as some machines have limitations on size and gauge. The shape and size of the products to be wrapped also play a role. Irregular or sharp products may require a wider and thicker gauge film to prevent breakage during the shrinking process. Conversely, regular, smaller, and less jagged items might not need as thick a polyolefin shrink film gauge. More uniform products present a lower risk of puncture, especially when using cross-linked shrink film.

The specific equipment you use and the intended speed for your shrink wrapping can also influence the film size. For faster operations, you should opt for a thicker gauge to reduce the risk of breakage. Ensuring proper sizing for a more efficient machine direction allows you to move products quickly through the shrink tunnel, enhancing productivity.

Buying the wrong-sized polyolefin shrink film can be costly. If you are uncertain about which film to select, our shrink wrapper parts and service department can assist you in assessing your specific packaging needs. Choosing the right shrink film makes operations more efficient. Contact us for guidance on selecting the correct width and gauge of either PVC or POF shrink film, ensuring your products remain protected and visually appealing on retail shelves.

HOW DO I KNOW IF I NEED SOFT SHRINK?

Soft Polyolefin Shrink film is a highly durable and smooth shrink film suitable for various applications. If you aim for an ideal presentation on retail shelves, soft shrink is the preferred choice. It minimizes wrinkles and "dog ears" in smaller, more challenging products, plus it offers higher puncture resistance and is more forgiving when excessive heat is applied in the shrink tunnel. Consult our parts and service department to determine if soft shrink is right for your packaging needs, as soft shrink films are available in both PVC and POF, each designed for different products.

WHAT PRODUCTS ARE THE BEST FIT FOR POLYOLEFIN SHRINK?

The short answer is that polyolefin shrink wrap is suitable for nearly everything. You will find this film on almost any single item in a retail store, including food products like gels, soaps, and pizzas. These shrink films are versatile and user-friendly, making them the most common type available. For a clean retail look and ease of use, polyolefin shrink films are your best option. We recommend opting for cross-linked shrink films over non-cross-linked types as they simplify the wrapping process for both operators and machinery.

HOW DO I SELECT THE RIGHT GAUGE FOR MY SHRINK FILM?

Choosing the correct gauge for your shrink film involves several considerations. First, assess the size, shape, and type of products you plan to shrink wrap. Products with sharp or jagged edges may necessitate a thicker gauge to resist tearing during or after the shrinking process.

Another factor influencing film gauge is the speed you plan to run. Higher speeds demand thicker gauges to prevent unwanted tearing in the film.

Selecting the right gauge is crucial, though it can be challenging without trial and error. To assist our customers, we offer in-person consultations where our parts and service team assesses your individual needs. Our technicians conduct shrink film tests to ensure you are using the best film for your requirements. Our cross-linked shrink film employs 29 microlayer technology, providing optimal performance. Contact us for more information.

SHOULD I USE PERFORATED OR NON-PERFORATED SHRINK FILM?

Shrink film is available in two forms: perforated and non-perforated. Perforated shrink film contains small, uniform holes that allow for even shrinkage, creating a smooth and uniform appearance. Non-perforated film requires users to create perforations themselves using specific rollers built into their machines. The best choice depends on consumer goals.

Most customers favor perforated shrink film due to its evenly spaced perforations, which enhance the smooth appearance and reduce the likelihood of tearing. Manual perforation may produce irregular, larger holes, increasing the risk of tearing during the shrinking process.

Approximately 90-95% of our clients purchase pre-perforated shrink films. However, some still prefer non-perforated options, utilizing a perf wheel for manual perforation. Certain delicate items may require customized perforations, so evaluate the products in use carefully.

Although convenient, manual perforated shrink wrap comes with challenges. It typically requires more time to apply perforations before wrapping begins. This form also necessitates additional parts in your equipment, demanding ongoing maintenance and occupying space in your warehouse.

Choosing the right shrink film is vital. Our service department is available for consultations regarding your shrink wrap and equipment. We can evaluate various shrink wraps in your warehouse to identify the best fit. In challenging scenarios, it's even possible to manually perforate pre-perforated films to provide customization. Contact us for more details.

SINGLE WOUND OR CENTERFOLD SHRINK FILM?

The distinction between single wound and centerfold shrink film is straightforward. Centerfold films are folded and ready for use upon arrival, while single wound films require folding before loading onto the machine. Your choice depends on a few factors, one of which is convenience. If you desire a film ready for immediate use, saving time and labor costs, centerfold shrink wrap is the superior option.

Single wound shrink wrap requires added components to create centerfold in-line.

For more information on heatshrink film, please contact us. We will gladly provide professional answers.

It is essential to note that single wound shrink films may often come from overseas, exposing them to various elements. This exposure can lead to film damage, particularly if the products encounter high temperatures.

WHAT IS THE DIFFERENCE BETWEEN MANUAL, SEMI-AUTOMATIC, OR AUTOMATIC SHRINK WRAPPERS?

Many automation levels exist when selecting a shrink wrapper. The equipment choice ultimately depends on customer goals and the products to be shrink wrapped. Some items require more manual handling, while uniform ones are better suited to fully automatic systems.

Manual wrappers involve the most operator labor. An operator must position the product in the sealing area and manually pull the seal head down to secure the bag. The operator then transports the item for sealing. These machines can have additional automation features like conveyors if desired.

A semi-automatic film wrapper has the operator place the film in the bay, followed by sealing the product with the head. The conveyor retrieves the finished product to move it out of the bay and into the seal panel for final sealing.

An automatic shrink wrapper operates independently. The operator simply places products on a conveyor, and the machine manages the process. This system is the easiest and safest to use, as it requires no manual intervention for sealing or film application.

Your choice of shrink wrapper model will depend on your needs and objectives. If you are unsure of the best option for your products, contact our sales department for guidance.

WHAT ARE THE MOST COMMON MISTAKES MADE WHEN SETTING UP A SHRINK WRAPPER MACHINE?

Our service department frequently assists customers experiencing issues with their shrink wrappers. Machines that fail to match accurately sized shrink film, including gauge, perforation, and width, will likely suffer from increased tearing during operation and heightened consumer frustration. That's why we emphasize the importance of ensuring our customers have the correct film for their specific needs from the outset.

For effective shrink film application, a clean and dry environment is critical. Humidity infiltrating the air dryer can compromise the film, negatively impacting the packaging process. Proper installation and maintenance of the dryer and surrounding conditions will help your shrink wrapper function optimally for an extended period.

Another common problem arises from insufficient power voltage for the machine. Many shrink wrappers need a 220-volt outlet to function correctly. Plugging them into lower-voltage outlets can lead to circuit shortages, preventing operation.

Lastly, our service department receives numerous calls about malfunctioning shrink wrappers or parts damage. Keeping shrink wrappers clean and well-maintained, especially upon installation, significantly reduces the risk of damage.

WHAT ARE THE MOST OFTEN NEGLECTED SHRINK WRAPPER MAINTENANCE ISSUES?

Maintenance for polyolefin shrink films primarily revolves around cleaning. Shrink wrappers should be cleaned after each shift to eliminate dust, debris, and carbon deposits. Customers should strictly use rags for cleaning—chemicals will corrode the bars and exacerbate issues and damage.

Another common misconception is the use of metal tools for cleaning the seal bars. Metal or wire brushes can remove the Teflon coating intended to prevent shrink wrap from sticking and will create a hot, sticky situation for users.

Always schedule preventive maintenance for your shrink tunnels and wrappers. Early detection of issues can prevent more significant problems down the line.

HOW DO I KNOW IF MY ISSUE IS FROM MY SHRINK FILM OR SHRINK FILM WRAPPER?

If you're encountering problems with your shrink film sealing poorly, a variety of factors could be the culprit. Issues could stem from the size and type of shrink film in use or from the equipment itself. Environmental factors, such as excessive humidity in the dryer or high warehouse temperatures, can also affect shrink wrap performance.

The best course of action when your shrink wrapper fails to seal appropriately is to consult our service department for assistance. If the issue is complex, our technicians can come directly to your warehouse for assessment.

MY SHRINK FILM ISN'T SEALING, WHAT DO I DO?

If your shrink film is failing to achieve a solid seal, a few points should be checked before reaching out to our service department. Start by examining the temperature settings on both the shrink wrapper and shrink tunnel. Low temperatures can cause seals to be weak, while excessively high temperatures can have the same effect.

Examine the duration the seal bar engages with the product. If it isn't pressed down long enough, or if it remains too long, the seal quality will suffer.

The pressure applied by the shrink sealer also influences the integrity of the seal around the product. All these factors can typically be adjusted over the phone, and our service department can help determine if the issue lies with the shrink wrap or the equipment itself.

ADDITIONAL QUESTIONS?

Shrink film serves as an invaluable resource worldwide for sealing and wrapping countless products, ensuring they appear fantastic on retail shelves. Selecting the appropriate polyolefin shrink film to suit your specific needs is crucial. For personalized consultations, contact us to help you identify the best film for your product's distinctive requirements.

For additional information on petg uses, feel free to reach out for assistance.