Freeze-dried fruit packaging bags are specially designed packaging containers for preserving and selling freeze-dried fruits such as freeze-dried strawberries, mangoes, durians, apples, etc. It is far more than a simple bag; it is a key component in ensuring product quality, extending shelf life, attracting consumers, and conveying brand value. It is not only the "armor" protecting the product but also the "bridge" for communication between the brand and consumers. An excellent freeze-dried fruit packaging can stand out among the numerous products on the shelves and ultimately deliver a perfect experience of crispness, deliciousness, and nutrition to consumers.
High barrier property: Core function, ensuring the product remains crispy and retains its flavor throughout the shelf life.
Good sealing performance: Through heat sealing technology, the edge sealing is ensured to be tight, preventing outside air from entering.
Anti-puncture property: The edges of freeze-dried fruits may be relatively hard, so the packaging material must be sufficiently tough to prevent damage during transportation.
Light-blocking property: Achieved through aluminum foil layers or printed dark patterns, protecting the product's color and nutrition.
Convenience: Features such as zipper closures and easy-tear openings greatly enhance the user experience.
Printing suitability: The outer material must be able to undergo exquisite printing to attract consumers' attention and convey brand information.
A qualified packaging bag for frozen dried fruits is usually made of composite materials, composed of multiple layers of films with different functions.
Outer layer (printing layer): Usually BOPP (biaxially oriented polypropylene) or PET (polyethylene terephthalate). The material is hard, has a good surface gloss, is easy to print beautiful patterns on, and is wear-resistant and scratch-resistant.
Middle layer (barrier layer): This is the most crucial layer. Commonly used:
Aluminum foil (AL): Provides excellent light-blocking, oxygen-blocking, and moisture-proof performance.
VMPET (vacuum metallized PET): Aluminum is deposited on PET film under high vacuum, which has good barrier properties and a metallic luster, and is a common alternative to pure aluminum foil with a lower cost.
EVOH (ethylene-vinyl alcohol copolymer): A high-performance high-barrier material with excellent oxygen-blocking properties, often used in inflatable packaging.
Inner layer (heat-sealing layer): Directly in contact with food, it must be a food-grade safe material. Commonly used CPP (cast polypropylene) or PE (polyethylene), which have good heat-sealing properties, softness, and certain moisture-proof properties.
Common composite structure example: BOPP / VMPET / PE - This structure combines exquisite printing effect, excellent barrier property and practical heat sealing performance.
