In the production of wet wipes, packaging film plays a decisive role in ensuring product quality and user experience. However, issues with soft plastic film can lead to sealing failures, packaging defects, and even product waste. At QianZhao, with extensive experience in packaging solutions and label stickers, we focus on identifying common problems and providing practical solutions to ensure smooth operations for manufacturers.
Common Problems in Soft Plastic Film Packaging
1. Film Quality Issues
One of the primary causes of sealing failure is poor film quality or inappropriate material selection. For example, if the corona treatment of the composite inner layer is uneven, particularly at the sealing point, the seal will inevitably fail. Although this issue is relatively rare, once it occurs, the entire batch may be scrapped.
This is why downstream processes must supervise upstream processes in the packaging industry. When problems arise, a root-cause analysis is essential, followed by corrective actions such as sourcing from a reliable supplier like QianZhao.
2. Unstable Seal
2.1 Contamination at the sealing point – The presence of water, oil, or dirt prevents the film from sealing properly.
2.2 Improper heating temperature –
- For composite films with an OPP inner layer (80–90μm), the sealing temperature should reach 170–180℃.
- For PE inner layer films (85–100 μm), the range is 180–200 °C.
As the film thickness increases, higher sealing temperatures are required.
2.3 Incorrect sealing time – When machine speed is too high, the film cools before sealing, resulting in weak or incomplete seals.
2.4 Insufficient sealing pressure – Without the right pressure, the seal remains weak, leading to leakage or packaging failure.
3. Film Deviation
If the packaging film is not installed properly, uneven tension on both sides can cause misalignment. A non-flat conveyor track or a loose guide device can also lead to deviation, affecting both sealing quality and efficiency.
Practical Solutions for Manufacturers
At QianZhao, we recommend the following corrective measures to minimize failures in wet wipes packaging film:
1. Ensuring Film Quality
- Source packaging film from reliable suppliers to ensure consistency.
- Test new film batches on the machine before mass production.
- Choose films with stable properties to ensure compatibility with sealing equipment and label stickers.
2. Optimizing Sealing Performance
- Adjust heating temperature: Set according to material type and thickness, determining the optimal temperature through experiments.
- Regulate sealing time: Modify according to machine speed and material characteristics. Too short leads to loose seals, while too long risks film damage.
- Control sealing pressure: Adjust the pressure device to secure a firm seal without damaging the film.
3. Preventing Film Deviation
- Ensure both sides of the film have even tension during installation.
- Regularly inspect and adjust the conveyor track for flatness.
- Tighten or replace guide devices to maintain accurate film alignment.
Final Thoughts
Soft plastic film failures in wet wipes production often stem from preventable issues related to film quality, sealing parameters, and equipment adjustments. By implementing systematic testing, regular maintenance, and sourcing reliable materials, manufacturers can significantly reduce defects and production losses.
At QianZhao, we not only provide premium packaging film solutions but also specialize in label stickers that enhance both branding and packaging efficiency. With our expertise, we help clients achieve consistent quality, efficiency, and reliability in their packaging processes.
👉 Contact QianZhao today to explore advanced packaging film and label sticker solutions tailored to your production needs.
