Three-Side Seal Bags are a widely used basic packaging format in the field of flexible plastic packaging. Characterized by a three-sided heat-sealed structure, precise edge trimming and sealing result in a flat, lightweight appearance, suitable for various materials such as powders, granules, and blocks. Common material structures include multi-layer composite films such as PET, PE, and VMPET. Combined with printing processes, this achieves a stable appearance and good barrier properties. Its simple overall structure facilitates efficient manufacturing and allows for convenient filling, sealing, and transportation by the user. It is suitable for both standard product packaging and multi-size combination packaging, making it an entry-level flexible packaging solution adopted by many brands.

1. Economic Structure

The Three Side Seal Bag features a three-side heat-sealing design, reducing material waste and achieving a production efficiency of 180–220 bags per minute, typical of the industry, suitable for high-volume processing. The flat structure reduces unit material consumption by approximately 10%–15%, contributing to overall packaging cost savings. Conventional composite structures such as PET/PE or OPP/VMPET/PE offer good stability and are the basic form chosen for most food and daily chemical products. For customers seeking cost-effective solutions, this structure meets most standard packaging requirements.

2. Diverse Materials

The Custom Versatile Three Side Seal Bag supports a variety of composite film materials, including PET/PE, PET/VMPET/PE, OPP/VMPET/PE, and Paper/PET/PE, with material thicknesses typically ranging from 60–150 microns, adjustable according to industry standards. Different material combinations achieve different levels of barrier properties; for example, structures with oxygen permeability of 0.5–2.0 cc/m²·day are more suitable for products requiring extended shelf life. This material diversity allows brands to precisely configure packaging according to different product categories.

3. Flexible Sealing

This product offers multiple sealing options, including standard zippers, pocket zippers, and Velcro zippers. The zipper system meets ASTM F88 standards, ensuring a seal strength of 12–18 N/15mm, facilitating repeated opening and closing. Combined with highly stable heat-sealing, it enhances product storage security and reduces leakage risk. Different sealing methods can be customized to suit different product types, improving the user experience.

4. Excellent Printing Performance

The Three Side Seal Bag offers a more complete front and back display area, allowing for high-quality custom printing. The PET substrate supports up to 8–10 colors of gravure printing, with a color abrasion resistance rating of ≥4. Its flat structure facilitates corona treatment, improving ink adhesion and ensuring consistent pattern clarity during transportation and storage. For product packaging requiring strong brand visual presentation, this bag type offers excellent display space.

5. Versatile Compatibility

The Custom Versatile Three Side Seal Bag boasts a stable structure, suitable for a variety of materials including powders, granules, dry goods, snacks, and electronic components. The bag type is compatible with most filling and heat-sealing equipment, allowing factory production lines to maintain an adaptation speed of 160–210 bags per minute. The material's stiffness and strength meet industry standards, satisfying the filling requirements of different materials and helping to reduce finished product deformation. This type of bag is a common choice for enterprises engaged in large-scale production.

1. Supermarket Retail Shelves

Three-Side Seal Bags are ideal for packaging snacks, treats, or condiments on supermarket retail shelves. The flat bag shape allows for uniform display, provides a large display area, and clearly showcases product information. The multi-layered composite film structure maintains the product's basic freshness, resulting in a more stable shelf life. Brands can achieve higher visual recognition on shelves through custom printing, enhancing sales competitiveness.

2. Cafes and Bakeries

Baked goods and coffee bean products often require lightweight, well-sealed packaging, and Three-Side Seal Bags meet the needs of small-portion products. Choosing PET/VMPET/PE structures enhances light and air resistance, keeping baked goods in good condition during short-term storage. Their lightweight nature facilitates bulk packaging, saving packaging costs and improving overall processing efficiency.

3. Pharmaceutical and Health Product Stores

Trial packs, granule bags, and powder repackaged products often use Three-Side Seal Bags as the basic packaging form. The composite film thickness can be adjusted according to the type of pharmaceutical product to help maintain the stability of the contents. The flat design clearly displays information, improving user convenience in identification. Professional printing also enhances label clarity and improves management efficiency.

4. Beauty and Personal Care Industry

Beauty masks, sample creams, or shampoo and conditioner refill packs are well-suited to Three Side Seal Bag packaging. The flat bag shape facilitates easy opening and storage for customers. The material provides basic barrier properties, reducing quality changes caused by light and air exposure. Different zipper types allow for reuse, making the packaging both convenient and practical. Its customizable features support various brand visual styles.

5. Industrial and Electronic Component Stores

Screws, electronic components, and small parts require convenient, sturdy, and easily categorized packaging. Three Side Seal Bags offer suitable structural strength. The use of PET/AL/PE composite structures improves puncture resistance and reduces damage during transportation. The flat bag shape facilitates labeling and numbering, aiding in inventory management. This packaging is suitable for the sales needs of small industrial products of various sizes.