When we pick up a fast food, we may rarely notice that thin sealing film. However, this seemingly simple film is a crucial barrier to ensure the quality and safety of fast food. Today, Leadtra Packaging will introduce several core characteristics of fast food sealing film to you. 

1. Sealing performance: the first line of defense for food

The primary task of fast food sealing film is to prevent leakage. High quality sealing film adopts a multi-layer composite structure, usually including a heat sealing layer, a barrier layer, and a printing layer. The heat sealing layer can quickly bond within 0.5-1.5 seconds, forming a reliable seal. The specially designed edge structure can withstand bumps and compression during transportation, and does not leak even when tilted at a 45 degree angle. 

2. Temperature resistance characteristics: adaptability to both hot and cold consumption

From scalding 70 ℃ hot soup to chilled 4 ℃ cold drinks, fast food sealing film needs to cope with extreme temperature changes. Modern sealing film adopts a special polymer formula, with a temperature resistance range of -20 ℃ to 120 ℃. When heated in a microwave oven, it does not melt or deform; When refrigerated, it will not crack. Some high-end products can even withstand an instant high temperature of 140 ℃, fully meeting the reheating needs of modern fast food. 

3. Safety and environmental protection: a reassuring guarantee for direct contact with food 

Food grade sealing film must pass the national food safety standard GB 4806 testing to ensure that no harmful substances migrate. Nowadays, biodegradable sealing films are made of materials such as PLA (polylactic acid), which can decompose over 90% within 180 days under industrial composting conditions. Some leading brands have started using water-based ink printing to avoid solvent residue and provide consumers with greater peace of mind. 

4. Functional Design: Detail Reflection of Smart Catering 

There are many clever designs hidden on the fast food sealing film: the microporous breathable film can allow the heat to be moderately discharged, preventing the packaging from expanding; Easy to tear design ensures effortless opening; Transparent windows facilitate viewing of content; The anti fog coating remains transparent and visible on hot food packaging. The latest technology can even integrate smart elements such as QR codes and temperature sensitive color changing prompts into it. 

5. Freshness retention performance: extending the scientific protection of delicious food 

Through multi-layer composite material technology, modern sealing films can effectively block oxygen, water vapor, and light. Data shows that high-quality sealing film can control the oxygen permeability below 10cc/m ² · day and the moisture permeability below 5g/m ² · day. This means that food can remain fresh and crisp for an additional 2 hours, and the aroma of hot food can be more long-lasting. 

6. Brand Value: Silent Marketing Ambassador 

Sealing film has become an extended carrier of brand image. High definition printing technology can achieve over 90% color reproduction, while UV coating makes patterns more durable. Some brands will print fun copy or interactive games on the sealing film, transforming simple packaging into a communication bridge between the brand and consumers. 

Leadtra Packaging is a professional manufacturer and global service provider of aluminum foil sealing film, providing one-stop services for sealing film, sealing gasket products and solutions. We are stationed in the factory for debugging, solving your sealing problems, and ensuring your production cycle. If you are interested in or have any questions about us, please feel free to call us for consultation.