3 Side Seal Packaging refers to a flat packaging bag with a three-side seal structure. This involves heat-sealing or high-frequency sealing the top, left, and right sides of the packaging material to create a stable planar structure. This structure maintains good airtightness and basic support after packaging and preserves a neat appearance during the filling process of different contents. Because of its flat shape, it occupies less space, resulting in higher placement efficiency during transportation and warehousing. 3 Side Seal Packaging offers high flexibility in structural design, allowing the length and width ratio of the bag to be adjusted according to the size and specifications of the contents, meeting the basic packaging needs of products of different sizes. The material combination can be configured according to the packaging objectives; a conventional PET layer can provide structural rigidity, while a PE layer can achieve heat-sealing compatibility, making the product more adaptable. Its appearance can be presented in various visual effects through conventional printing processes, making it suitable for categories that require basic brand display.

1. Lightweight

3-Side Seal Packaging utilizes a flat bag structure with a customizable thickness ranging from 60–150 μm, effectively reducing material usage while maintaining a tight seal. This lightweight design results in lower per-bag weight, thus reducing overall packaging costs. Multi-layer composite materials such as PET/PE and OPP/VMPET/PE maintain excellent barrier properties while maintaining lightweight construction. Combined with the product name "Customized Size Flat 3 Side Seal Packaging," its flat structure facilitates large-scale stacking, increasing packing volume and providing customers with higher transportation efficiency.

2. Sealing

The three-side seal structure provides stable seal strength, with a heat-sealing width typically set at 6–10 mm, ensuring a good seal after filling. Composite structures such as PET/AL/PE achieve superior oxygen and moisture barrier properties, maintaining the basic quality of the contents during transportation and sales. For Customized Size Flat 3 Side Seal Packaging, weak sealing edges are less likely to occur, maintaining bag integrity in standard drop and tensile tests, making it suitable for products with high sealing requirements.

3. Multiple Materials

Customized Size Flat 3 Side Seal Packaging offers a variety of material options. PET/VMPET/PE can be selected for enhanced metallic sheen, while OPP/VMPET/PE can be chosen for increased stiffness. Material thickness can be set according to industry standards from 70–130μm to meet different barrier requirements. A paper/PET/PE structure is suitable for brand display needs, offering a more natural texture. The diverse material combinations allow 3 Side Seal Packaging to find suitable solutions across different product lines, balancing visual appeal and basic protective performance.

4. Accessories

This product can be paired with various common industry opening structures, such as standard zippers, snap zippers, and Velcro zippers. The zipper seal can withstand 20–30 or more opening and closing cycles, giving the packaging better reusability. The installation width and position of the zipper can be finely adjusted according to the bag size, making Customized Size Flat 3 Side Seal Packaging more convenient in practical use. During transportation, this structure also helps prevent accidental spillage of contents.

5. Economy

Customized Size Flat 3 Side Seal Packaging requires fewer material layers in production; the composite structure typically only needs 2-3 layers, allowing for more flexible cost control. Flat bags do not require complex three-dimensional forming processes, and the sealing process is highly standardized, making them compatible with high-speed bag-making machines and improving production efficiency. The cost per bag for 3 Side Seal Packaging is lower than that of stand-up pouches of the same size, making it suitable for mass production and providing customers with a more practical solution within their packaging budgets.

1. Supermarket Retail Area

3-Side Seal Packaging is suitable for packaging various granular, powdered, and lightweight food products. Its neat, uniform shape ensures good flatness on supermarket shelves, making it easy to place. Customized Size Flat 3-Side Seal Packaging can be customized to product dimensions, enhancing product visibility and cleanliness at the retail level, increasing consumer attention.

2. Coffee Shop Storage Area

Coffee beans and small packages of coffee powder can be stored in airtight containers using 3-Side Seal Packaging. Materials such as PET/AL/PE offer excellent oxygen barrier properties, helping to maintain flavor during short to medium-term storage. The flat design of Customized Size Flat 3-Side Seal Packaging allows coffee shops to maximize shelf space within limited areas, keeping the storage area tidy.

3. Pharmaceutical Packaging Area

Medical consumables and disposable reagent kits are suitable for individual sealing using 3-Side Seal Packaging. The PET/PE or PET/AL/PE structure maintains stable tear resistance under normal conditions. Customized Size Flat 3 Side Seal Packaging can be precisely customized to specifications, making the categorization of items within pharmaceutical packaging clearer and facilitating batch management.

4. Frozen Food Processing Plants

In frozen semi-finished product packaging, the PE heat-sealing layer of 3 Side Seal Packaging maintains flexibility at low temperatures and is not easily broken. The three-side seal structure of Customized Size Flat 3 Side Seal Packaging can withstand common frozen handling processes, providing excellent adaptability for packing and transportation, allowing frozen food plants to maintain the neat appearance of products.

5. Cosmetic Manufacturing Lines

3 Side Seal Packaging is often used for trial packaging of liquid masks, small-packaged serum samples, etc. The PET/VMPET/PE structure has a good gloss, which can enhance the product display effect. Customized Size Flat 3 Side Seal Packaging can precisely match the content volume, enabling cosmetic factories to achieve rapid filling on the production line and improve overall production efficiency.