How to store leather hot melt adhesive film properly?

Leather hot melt adhesive film is a versatile and essential material in various industries, especially in leather processing and manufacturing. As a professional leather hot melt adhesive film supplier, I understand the importance of proper storage to maintain its quality and performance. In this blog, I will share some scientific and practical tips on how to store leather hot melt adhesive film properly.

Understanding the Characteristics of Leather Hot Melt Adhesive Film

Before discussing storage methods, it's crucial to understand the basic characteristics of leather hot melt adhesive film. This type of adhesive film is typically made of thermoplastic polymers, which means it softens when heated and solidifies when cooled. Its performance can be affected by various factors such as temperature, humidity, and exposure to light and air.

Temperature Control

Temperature is one of the most critical factors in storing leather hot melt adhesive film. Extreme temperatures can cause the film to lose its adhesive properties or even become damaged.

• Optimal Temperature Range: The ideal storage temperature for leather hot melt adhesive film is between 20°C and 25°C (68°F - 77°F). This temperature range helps to maintain the chemical stability of the adhesive and prevents premature aging.
• Avoiding High Temperatures: High temperatures can cause the adhesive to soften or melt, leading to sticking and clumping. If the film is stored in an environment above 30°C (86°F) for an extended period, its adhesive strength may decrease significantly. Therefore, it's essential to keep the storage area away from direct sunlight, heating sources, and other high - temperature equipment.
• Preventing Low Temperatures: Low temperatures can make the film brittle and reduce its flexibility. When the temperature drops below 10°C (50°F), the adhesive may become too hard, making it difficult to use. In cold climates, it's necessary to ensure that the storage area is properly heated to maintain the appropriate temperature.

Humidity Management

Humidity can also have a significant impact on the quality of leather hot melt adhesive film. Excessive moisture can cause the film to absorb water, which may lead to delamination, mold growth, and a decrease in adhesive strength.

• Ideal Humidity Level: The recommended humidity level for storing leather hot melt adhesive film is between 40% and 60%. This range helps to prevent moisture absorption and maintain the integrity of the film.
• Using Dehumidifiers: In areas with high humidity, such as coastal regions or basements, it's advisable to use dehumidifiers to control the moisture level in the storage area. Dehumidifiers can effectively remove excess moisture from the air and keep the environment dry.
• Proper Packaging: To further protect the film from humidity, it should be stored in air - tight packaging. Most leather hot melt adhesive films are supplied in sealed plastic bags or containers, which can help to prevent moisture from entering. However, it's still important to check the packaging regularly for any signs of damage or leakage.

Protection from Light and Air

Exposure to light and air can cause the leather hot melt adhesive film to oxidize and degrade over time.

• Light Protection: Ultraviolet (UV) light can break down the chemical bonds in the adhesive, leading to a loss of adhesive strength and color change. Therefore, the film should be stored in a dark place or in opaque packaging to minimize exposure to light.
• Air Sealing: Oxygen in the air can also cause oxidation of the adhesive. To prevent this, the film should be stored in air - tight containers or sealed bags. If the film is stored in an open environment for a long time, its adhesive properties may gradually deteriorate.

Storage Space and Organization

Proper storage space and organization are also important for maintaining the quality of leather hot melt adhesive film.

• Clean and Dry Storage Area: The storage area should be clean, dry, and free from dust, dirt, and other contaminants. Regular cleaning of the storage area can help to prevent the film from being contaminated.
• Proper Shelving and Racking: The film should be stored on clean, flat shelves or racks to prevent bending, folding, or damage. It's also important to stack the film neatly and avoid over - stacking, which can cause pressure on the lower layers and lead to deformation.
• Inventory Management: Keeping track of the inventory is essential to ensure that the oldest stock is used first. This helps to prevent the film from being stored for too long and losing its quality.

Special Considerations for Different Types of Leather Hot Melt Adhesive Film

There are different types of leather hot melt adhesive film available in the market, such as Metal Bonding Hot Melt Adhesive Film, Thermoplastic Hot Melt Adhesive Film For Laminating The Aluminum, and 0.01 - 0.05mm Ultra Thin Hot Glue Melt Film For Laminating The Textile Fabric. Each type may have specific storage requirements.

• PES - based Adhesive Film: PES (Polyester) - based leather hot melt adhesive film is relatively stable and can tolerate a wider range of temperatures and humidity. However, it still needs to be stored in a cool, dry place to maintain its performance.
• EVA - based Adhesive Film: EVA (Ethylene - Vinyl Acetate) - based adhesive film is more sensitive to temperature and humidity. It should be stored at a lower temperature and humidity level to prevent softening and sticking.
• TPU - based Adhesive Film: TPU (Thermoplastic Polyurethane) - based adhesive film is known for its flexibility and durability. But it can be affected by UV light and oxygen, so proper protection from light and air is crucial.

Conclusion

Proper storage of leather hot melt adhesive film is essential to ensure its quality and performance. By controlling temperature, humidity, and protecting the film from light and air, you can extend its shelf life and maintain its adhesive properties. As a leather hot melt adhesive film supplier, I am committed to providing high - quality products and professional advice on storage and usage. If you have any questions about leather hot melt adhesive film or need to purchase our products, please feel free to contact us for more information and to start a procurement negotiation.

References

• "Handbook of Adhesive Technology", Second Edition, edited by Andrew Pizzi and K. L. Mittal
• "Adhesives and Sealants Technology: Chemistry and Applications", by Robert L. Patrick