Over-Stretching or Under-Stretching the Film
Over-stretching: Stretching the Hand Stretch Film too much can lead to breakage, causing the film to snap during application or transportation. While it may seem like stretching more would make the wrap tighter, it can actually result in a weaker hold because the film becomes too thin and prone to tearing. Hand Stretch Film is designed to stretch to a certain elongation point, and exceeding this can compromise its integrity. Additionally, over-stretching can reduce the elasticity of the film, diminishing its ability to return to its original form and securely hold the load. This can lead to a loss of load stability and protection, making it less effective for transport or storage.
Under-stretching:On the other hand, under-stretching the film means not applying enough tension, which can leave the load insecure and more susceptible to shifting or falling apart. A loose wrap can lead to instability during transit, increasing the risk of damage to the products being shipped. This issue can arise with both Hand Stretch Film and Machine Stretch Film. With VCI Stretch Film, under-stretching could also compromise the effectiveness of the corrosion inhibitors, as the film might not fully cover the items, allowing exposure to moisture.
Tip: Aim for the optimal elongation point (usually around 300-400% stretch) to ensure a balance between strength and stretchability. The film should feel taut but not excessively tight. Practice helps in identifying the correct amount of stretch for different types of loads.
Incorrect Film Tension Leading to Load Instability
Too much tension: Applying too much tension can cause the film to pull unevenly, which may lead to distortion or deformation of the load. Over-tightening the film can put excessive pressure on the items, causing them to shift or even break, especially when wrapping fragile products.
Too little tension: If the film is too loose, it won’t provide enough support to secure the load. The wrap will be ineffective, allowing the load to shift or fall apart, which can result in damage during transit. Under-tensioned wraps are particularly problematic when using Hand Stretch Film, as the operator needs to apply the right amount of manual force to keep the film taut. This also applies to VCI Stretch Film, as a loose wrap may result in poor corrosion protection for metal products, leaving them exposed to moisture.
Tip: Ensure the film is applied with consistent tension. For uneven or irregular loads, adjust the tension as needed to secure the load without distorting the shape or placing undue pressure on fragile items. Some stretch film dispensers come with tension control features, which can help maintain a steady, optimal tension during the wrapping process.
Wasting Material by Cutting Incorrectly
Excessive cutting: When cutting the film at the end of the wrap, leaving too much excess material can lead to unnecessary waste. While it may seem easier to cut generously, it’s important to only leave enough film to secure the end without wasting excess that doesn’t contribute to the wrap’s strength.
Incorrect cutting technique: Cutting the film improperly can cause uneven edges or jagged cuts that make it difficult to tuck the film securely or finish the wrap neatly. This can result in a weaker wrap that’s more prone to coming undone during transport. A messy cut can also lead to difficulties in handling and applying the next layer of film, as it may unravel or tear prematurely.
Tip: Always cut the film as close to the load as possible without wasting extra material. If using a stretch film dispenser, make sure to use the built-in cutter for a clean, straight cut. For a more secure finish, you can tuck the film under itself or use tape to seal the loose end neatly.