Flat Bottom Pouches Manufacturers

What We Manufacture in This Category

An eight-side seal bag is a three-dimensional pouch heat-sealed along eight surfaces: front and back panels, both side gussets, the top, the bottom and the diagonal fold intersections. That construction produces a box-shaped pouch that stands independently, resists compression and holds a high barrier against moisture, oxygen and light. We produce these bags as pre-made pouches on our own printing and lamination lines, using food-grade composite structures such as PET/AL/PE and PA/EVOH/PE.

Our standard range in this category includes three production formats that cover the most common filling weights and shelf conditions. Each format can be adapted in dimensions, film structure, closure type and print design.

Where Eight-Side Seal Bags Fit

The format suits products that need shelf presence, repeated opening and closing, and protection against moisture pickup or oxygen ingress. Coffee roasters use the 250g–1kg size because the valve releases CO₂ while the foil layer blocks light and oxygen. Chocolate and confectionery brands choose the moisture-proof version with a window or matte surface to show product texture. Pet food and dry goods producers use the 5–20kg flat bottom pouch where stacking stability and puncture resistance matter more than display.

• Barrier requirement: PA/EVOH/PE structures for oxygen-sensitive contents; PET/AL/PE where light blocking is critical.
• Closure: press-to-close zipper, slider zipper, easy-tear notch or one-way valve.
• Display: transparent window, matte or gloss finish, high-resolution gravure printing.
• Load: reinforced side ribs and wide base for 5kg and above.

Materials and Barrier Engineering

We build the film structure around the product's sensitivity and the intended shelf life. Our co-extrusion lines run 7-layer, 9-layer and 11-layer PA/PE and PA/EVOH/PE combinations, and we laminate aluminium foil or metallised layers where light and oxygen transmission must be minimised. Thickness, layer sequence and sealant grade are selected so the pouch survives filling, transport and retail handling without flex cracking or seal failure.

For brands moving toward recyclable structures, our Mono-Material Package range uses single-polymer films that keep the eight-side seal geometry while simplifying end-of-life sorting.

Configuration Options

Every eight-side seal bag we quote is configured from the same set of variables. Changing one usually affects the others, so we confirm them together before sampling.

• Dimensions: width, gusset depth, height and base panel, matched to fill weight and target shelf space.
• Film structure: PA/PE, PA/EVOH/PE, PET/AL/PE or mono-material PE, with specified total thickness.
• Closure: zipper, slider, valve, spout or plain top seal.
• Printing: gravure or digital, up to full-surface coverage, with brand colour matching.
• Finishing: matte, gloss, soft-touch, window, tear notch, hang hole.

Filling Line and Automation Integration

Eight-side seal bags run on pre-made pouch filling lines, including rotary and linear machines with pick-up, opening, filling, sealing and optional gas flushing stations. We supply the pouches with consistent seal geometry and controlled film slip so suction cups and grippers index reliably at line speed. Where the line uses MAP or vacuum, we adjust the sealant layer and seal window accordingly.

For projects that also need roll stock, our Multi-layer Co-extruded Film and Custom Printing Film Roll ranges are produced on the same co-extrusion platform, which keeps barrier performance consistent between pouch and roll formats.

Quality Control and Acceptance

Production follows ISO 9001, HACCP, BRC and GMP systems, and our raw material pellets are 100% brand-new food-grade grades. Each batch is checked for tensile strength, puncture resistance and seal integrity, with material composition and barrier testing where the application requires it. Freezing, vacuum and transport simulation tests are used for frozen and export-bound products. Inspection data is traceable from raw material to finished pouch, and batch reports can be issued with delivery.

Acceptance is normally based on agreed dimensions, print colour, seal strength, barrier values and visual defects. We confirm the inspection criteria with the customer before mass production so the first article and the final batch are measured against the same standard.

Information We Use to Configure Your Solution

To prepare an accurate structure, price and sampling plan, we need the following project inputs. Missing items are confirmed during the enquiry stage rather than assumed.

• Product type, fill weight, bulk density and any sharp or fragile components.
• Target shelf life, storage conditions and whether MAP, vacuum or frozen handling applies.
• Pouch dimensions or a reference sample, plus required closure and valve type.
• Print artwork in .pdf or .ai format, colour references and surface finish.
• Filling line type, speed and any gas flushing or sealing parameters.
• Order quantity, delivery destination and required certification documents.

Delivery, Documentation and Support

Our factory is in Songjiang District, Shanghai, about 50km from Shanghai Port, which supports sea freight for volume orders and air freight for urgent shipments. Standard delivery scope covers printed pouches, cartons and pallets, with batch inspection reports and certification copies where required. Artwork files, dielines and approved samples are retained for repeat orders so reprints match the original run.

Frequently Asked Questions

What is the difference between an eight-side seal bag and a stand-up pouch?

An eight-side seal bag is heat-sealed on eight surfaces, including side gussets and diagonal folds, giving a rigid box shape with higher compression strength. A stand-up pouch typically uses a three-side or four-side seal with a bottom gusset, which is lighter but less stable when stacked. For heavy fills or premium shelf display, the eight-side seal format holds its shape better.

Can you produce eight-side seal bags with a degassing valve and zipper?

Yes. Our 250g–1kg coffee format is built with a one-way degassing valve and a press-to-close zipper as standard options. The valve position, zipper width and seal window are confirmed against the filling line before sampling.

What materials do you use for moisture and oxygen protection?

We use PET/AL/PE and PA/EVOH/PE composite structures, with aluminium foil or metallised layers where light blocking is needed. For recyclable projects, mono-material PE structures are available. The final structure is selected from the product's sensitivity, target shelf life and storage conditions.

What is your production capacity and lead time?

We operate two printing lines with a daily capacity of 550,000 packaging bags and 2,500 tons of roll film. Lead time depends on artwork approval, structure complexity and order quantity, and is confirmed in the quotation.

Do you supply stock eight-side seal bags for trial runs?

We hold stock of plain white and black public-version bags in common coffee sizes such as 250g, 500g and 1kg. These are suitable for filling trials and small launches before committing to a custom printed run.

Which certifications apply to your eight-side seal bags?

Our production system is certified under ISO 9001, HACCP, BRC and GMP, with ISO 13485 also applicable to medical-adjacent packaging. Raw materials comply with FDA and EU food-contact standards. Certification copies and batch inspection reports are provided with delivery where required.