Improper storage of laminating film can affect the sealing effect! Understanding the correct temperature, humidity, and light requirements, and mastering professional storage techniques for laminating film, will ensure your laminating film always maintains optimal performance.
1. Why is proper storage crucial?
For wholesale buyers and end-users, the storage of laminating film may seem simple, but it directly affects the final sealing effect and the product's lifespan.
Laminating film is mainly composed of substrates such as PET and PVC and a hot melt adhesive layer. These materials are highly sensitive to environmental factors.
Consequences of improper storage:
• Poor sealing effect: The adhesive layer becomes damp or deteriorates, leading to bubbles, incomplete sealing, or blurry results after lamination.
• Film deformation: High temperatures or heavy pressure cause the film to curl, stick, or change size, causing jamming.
• Shortened lifespan: Premature aging of the film affects its transparency and protective performance.
2. Four Core Principles of Laminating Film Storage
The ideal storage environment for laminating film can be summarized by four key elements: constant temperature, dryness, protection from light, and flatness.
2.1. Temperature Control: Avoid Extreme Temperatures
• Ideal Temperature Range: It is recommended to store laminating film in a constant temperature environment between 15°C and 25°C.
• Avoid High Temperatures: Keep away from heat sources such as radiators, direct sunlight, and boilers.
• Avoid Low Temperatures: Extremely low temperatures can make the film brittle, affecting its flexibility and making it more prone to cracking or unevenness during lamination.
2.2. Dryness: Humidity is the Number One Killer of Quality
Moisture is the number one enemy affecting the quality of laminating film. Once the hot melt adhesive layer absorbs moisture, the moisture will quickly vaporize when heated in the laminating machine, resulting in a large number of bubbles in the laminated product.
• Ideal Humidity Range: Maintain the relative humidity of the storage environment between 40% and 60%.
• Moisture Protection: Avoid placing laminating film directly on the ground, especially on the ground floor or in the basement. It is recommended to use pallets or shelves and ensure good ventilation.
• Packaging Protection: Keep the laminating film in its original moisture-proof packaging bag or carton. Unopened packaging provides optimal moisture protection.
2.3. Light Protection: Prevent UV Aging
Prolonged exposure to direct sunlight will accelerate the aging of the laminating film substrate (such as PVC) and adhesive layer, causing the film to yellow, become brittle, and reduce its transparency.
• Storage Location: Must be stored in a cool, dark warehouse or storage room.
• Light Influence: Avoid prolonged exposure to strong fluorescent lights or UV light.
2.4. Flatness: Prevent Physical Deformation
• Proper Stacking: Laminating film should be laid flat on a firm, flat surface.
• Avoid Heavy Pressure: Avoid stacking excessively heavy items on the laminating film. Heavy pressure can cause permanent deformation of the film, making it prone to wrinkles or jamming during lamination.
• Roll Film Storage: If it is roll film, it should be stored vertically or as recommended by the supplier to prevent edge damage or curling deformation.
3. Storage Recommendations for Wholesalers
For wholesalers making large-volume purchases, proper storage management is crucial to ensuring inventory quality:
3.1 First-In, First-Out (FIFO): Prioritize using the earliest received laminating film to avoid inventory buildup leading to film aging.
3.2 Regular Inspections: Regularly check warehouse temperature and humidity records to ensure the environment meets standards.
3.3 Original Packaging: Before use, always keep the laminating film in its original factory cartons and moisture-proof packaging.
Further Reading：Yidu High-Quality Laminating Film Series