Custom 3-Side Sealed Bags – Reliable Flexible Packaging for Diverse Industries

As consumer demand for safe, lightweight and customizable flexible packaging keeps rising, 3-side sealed bags, also known as three-side seal pouches, remain one of the most popular packaging solutions globally. Our company, a professional manufacturer specializing in custom flexible packaging, delivers tailor-made three-side seal bags with adjustable materials, thicknesses, sizes and printing designs to satisfy varied packaging requirements from global buyers across food, beauty, pharmaceutical and daily chemical sectors.

A three-side sealed bag is manufactured by sealing three edges of a flat film roll, leaving one side open for product filling before final sealing. This simple yet mature structure brings great convenience for mass production and packing. Multiple laminate material combinations are available for our custom 3-side seal pouches. Common material structures include PET/PE, PET/AL/PE, PET/VMPET/PE, PA/PE, PET/NY/PE, PET/AL/RCPP, etc. Each material has unique features. PET offers good stiffness and excellent printing performance for vibrant artwork. AL aluminum foil layer creates full barrier against oxygen, moisture and light, ideal for products requiring long shelf life. VMPET is metallized film as a cost-effective alternative to pure aluminum foil, providing moderate barrier properties. NY (Nylon/PA) delivers strong puncture resistance for sharp or heavy contents. PE is the inner heat-sealing layer to ensure tight sealing, while RCPP can withstand high-temperature retort sterilization.

We support a wide range of customizable film thickness options. The common total thickness for regular 3-side seal bags ranges from 60 microns to 180 microns. Thin options around 60–80μm are widely adopted for lightweight products such as facial mask sachets, sample packets for skincare and small condiment packs. Medium thickness at 90–120μm works well for dry snacks, nuts, candies and tea packaging. Heavy-duty thickness from 130μm to 180μm is selected for items needing stronger puncture resistance, including frozen food, pet treats and granular seasonings. Retort-grade three-side seal bags can be produced with thicker composite films to endure 121℃ high-temperature cooking.

3-side sealed pouches cover extensive application scenarios. The most well-known use is facial mask packaging. Mask 3-side foil bags with aluminum barrier lock in essence, prevent liquid evaporation and shield active ingredients from UV damage. For food packaging, these pouches pack dried fruits, potato chips, nuts, candies, spices, tea leaves, coffee powder and small frozen snacks.

They are also widely used for pet food, pet treats and veterinary sachets. Besides food and beauty industries, three-side seal bags serve pharmaceutical sachets, medical disinfection supplies, detergent samples, seed packaging, hardware accessories and electronic component packaging.

There are remarkable advantages of 3-side sealed bags in the flexible packaging industry. First of all, the flat structure saves storage and shipping space when empty, lowering logistics cost. Secondly, the fully sealed three edges achieve outstanding leak-proof performance, protecting liquid, powder and granular goods from moisture, air and contamination. Thirdly, the whole front surface is available for high-definition gravure printing, supporting custom logos, product images and brand colors to boost shelf attraction. Compared with stand-up pouches, three-side seal bags have lower mould cost and shorter lead time for small and bulk orders. The composite materials can be customized for different barrier levels: anti-oxygen, moisture-proof, light blocking, oil-resistant or high-temperature resistant as requested.

Our core strength lies in full customization service. We do not limit clients to fixed sizes, materials or thickness specifications. Customers can freely choose composite material structures, total film thickness, bag width & length dimensions, printing colors and surface finishing (matte or glossy). Additional optional functions are available too, such as tear notches for easy opening, anti-static treatment and food-grade certification. Whether clients need tiny sample sachets or large-format heavy-load three-side sealed bags, our technical team can formulate suitable packaging solutions based on product properties, storage environment and target shelf life.

We have rich experience serving importers, brands, distributors and factories worldwide. All raw materials comply with food contact standards. Our factory implements strict quality inspection during film lamination, printing and bag making processes to avoid sealing failure, pinholes or ink peeling.

If you are sourcing reliable custom flexible packaging, welcome to send us your product details and packaging requirements for a free quotation. Our sales and engineering team will reply promptly and recommend the best material and thickness solution for your three-side sealed bag project.