Three-side seal bags are one of the most classic and widely used bag types in flexible packaging. Their structure is simple: multiple layers of film are laminated together to seal the left, right, and bottom sides, leaving only an opening at the top for product filling.

Key Features and Advantages

• Sealing and Preservation: Three-side heat sealing provides excellent airtightness and moisture resistance, effectively isolating oxygen and moisture.

• Cost and Efficiency: Simple structure, making it one of the most economical bag types, and highly compatible with automated packaging equipment.

• Space and Display: The flat design without a flat bottom maximizes storage and logistics space; the smooth surface also provides a perfect printing canvas for effective brand information display.

• Functional Expansion: Easy-tear openings, zippers, and carrying handles can be added as needed to enhance convenience.

• Safety and Durability: The material is non-toxic and odorless, meeting food contact standards; it is also highly adaptable, able to withstand extreme environments from -70℃ freezing to 135℃ high-temperature sterilization.