When using laminating film to encapsulate documents, photos, or certificates, many people encounter a common problem: edge warping.
As an experienced manufacturer of thermal laminating film, we've summarized the main causes of edge warping and their solutions, hoping to help you easily resolve this issue.
1. Why does laminating film warp?
Low temperature
If the laminator temperature is insufficient, the adhesive layer in the thermal laminating film won't fully melt, resulting in a loose bond around the edges and warping.
Uneven pressure
Insufficient pressure during encapsulation or uneven force applied to the machine rollers can also cause a loose seal and uneven edges.
Excessive encapsulation speed
Excessive speed causes uneven heating of the laminating film, resulting in incomplete fusion of the adhesive layer in some areas, causing warping at the edges.
Poor quality laminating film
Low-quality laminating film has uneven adhesive layer thickness or unstable coating, which can easily cause edge warping after encapsulation.
Humid Storage Environment
If encapsulated products are stored in a humid environment, thermal expansion and contraction may cause deformation or warping.
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2. Solutions for Warping in Laminating Film
Adjusting Temperature and Speed
Adjust the temperature appropriately based on the thickness of the laminating film:
80μm: 100–110°C
100μm: 110–120°C
125μm: 120–130°C
A moderate temperature and a slightly slower speed will allow the adhesive layer to fully melt and form a secure bond.
Check the laminator rollers
Ensure they are clean and evenly applied. Clean any dirt or residual adhesive promptly.
Use High-Quality Laminating Film
High-quality laminating film provides an evenly distributed adhesive layer, resulting in a smooth, flat, and less warping effect after encapsulation.
Keep it dry and store.
Encapsulated finished products should be stored in a dry, cool place to avoid moisture and deformation.
3.How to Find the Right Laminating Film Supplier
The following points can help you choose the right laminating film factory:
Experienced Production
Choose a supplier with many years of manufacturing experience. They are more consistent in material selection and process control, ensuring product consistency.
Strict Quality Control
High-quality factories will establish inspection processes during coating, cutting, and packaging to ensure the laminating film is flat, bubble-free, and does not warp.
OEM/ODM Services Available
Customizable film thickness, width, length, packaging, and other specifications help you better meet the needs of your target market.
Reliable Production Capacity and Delivery
Check whether the supplier has multiple production lines and sufficient production capacity to ensure timely delivery of large orders.
Experienced Exporting
Suppliers with international export experience are more familiar with the quality standards and packaging requirements of different countries.