Quad-Seal Bags: Pet Food Uses & Format Comparisons
Choosing quad-seal bags for your product
Quad-seal bags have side gussets and four longitudinal corner seals that define the front, back and side panels. They suit dry products such as pet food when a structured pack is useful. The bag drawing sets the base construction, filling opening and closure for the intended pack.
Quad-seal pouch specifications
Parameter | Specification |
|---|---|
Bag construction | Side gussets with four longitudinal corner seals. |
Material structures | PET/VMPET/PE; PET/NY/PE. |
Load and handling | Filled weight and handling conditions determine the laminate stiffness, puncture resistance and seal construction for larger packs. |
Dimensions | Finished front width, height and side gusset depth include the sealed edges. Corner seals and folds define the usable panel areas. |
Opening and closure | The bag drawing identifies the filling opening, final seal and any zipper, reclosure or handle. |
Gravure printing MOQ | 6,000 linear metres of printed film, measured along the roll. Bag quantity is calculated from the print repeat, bags per repeat and conversion allowance. |
Quotation | Itemized quotation within 24 business hours. |
Structure and filled-pack checks
Side gussets expand during filling, and four longitudinal corner seals define the front, back and side panels. Specify the base finish and opening arrangement on the drawing.
Construction details
Use the details below to review the drawing, filling process and filled sample.
1. Corner seals
Four longitudinal corner seams define a quad-seal bag. Show these seams and the base construction on the bag drawing.
2. Side gusset
Check the expanded side depth. The folded side expands as the bag fills. Compare the front width, gusset depth and filled sample with the intended product volume and handling method.
3. Filled-pack checks
Review seals under the intended load. Filled weight and product edges affect the demands on the seals and film. Agree appropriate filled-pack and handling checks before approving a heavier fill.
Common applications
Coffee and specialty dry foods
The side panels can carry product information while leaving a broad front for branding. Confirm degassing requirements separately from bag shape, and check how the buyer opens and stores the pack after first use.
Pet food, grains and larger fills
Quad-seal bags suit dry products that need a structured filled profile, including larger fills. Set the corner seams, base, puncture protection and transport packaging for the filled weight.
Powders and ingredient packs
Gussets provide filling volume. Keep dust clear of folds and final seals, and set nozzle access and settling time for the filling line.
Advantages
Panel definition
Corner seals give front, back and sides distinct areas for artwork and information.
Expandable side volume
Gussets allow a compact empty profile to expand around the contents. Capacity must be established using the real product.
Configurable opening
Choose the opening and reclosure system for the way customers fill, open and use the pack.
Practical considerations
Base construction
Side-gusset bags can have different bottom closures and standing behaviour. Specify the base construction on the drawing.
Seal and fold intersections
Local layer build-up and product contamination can affect the final closure. Trial the intended filling and sealing conditions.
Filled-weight and handling requirements
Set the corner seals, base and secondary packaging for the intended filled weight and handling requirements.
Compare bag types
Compared with flat-bottom bags
Flat-bottom bags generally offer a more defined base and box-like shelf footprint. Quad-seal bags provide a structured side-gusset profile with four corner seams. Select the construction around the shelf and filling brief. Read the flat-bottom bags guide.
Compared with stand-up pouches
A stand-up pouch often presents a broad front and convenient zipper opening for smaller repeated-use packs. Compare quad-seal where side profile and filled volume are more important. Actual size and closure choices can change that balance. Read the stand-up pouches guide.
Compared with back-seal pillow bags
Back-seal pillow bags work well on form-fill-seal lines and suit products displayed lying flat or in an outer carton. Read the back-seal pillow bags guide.
Specifications for your quote
Provide the specifications you know and mark any open items as "to confirm".
Specification | What to provide or verify |
|---|---|
Corner and bottom seals | Provide a drawing of all seals and the required filling opening. |
Gusset convention | Specify whether the stated gusset dimension is folded depth or full expansion. |
Product and protection | State contents, target fill, storage and distribution. Identify barrier, puncture, chemical or thermal requirements that need verification. |
Material and thickness | Choose the material structure and thickness for the application and agreed trials. |
Artwork and quantity | Provide print files or artwork status, finish, quantity per design and size, destination and required schedule. |
Sampling and documentation | Agree sample type, machine or filling trials, acceptance criteria and relevant supporting documents before order approval. |
Questions before ordering
What distinguishes quad-seal bags from side-gusset bags?
Side gussets are the expanding side folds; quad-seal adds four longitudinal corner seams. Specify both features on the drawing.
How do I specify a bag for a heavier fill?
Specify the filled weight and handling conditions, then check the proposed film and seals with filled-pack tests.
Which reclosure options are available?
Add the selected zipper or reclosure system when the bag needs to be opened repeatedly.
What are the MOQ, sample lead time and production schedule?
For gravure-printed packaging, the MOQ is 6,000 linear metres of printed film. Normal production takes 15 working days for a first order and 10 working days for a repeat order, counted from signing the formal contract. Shipping time is additional. Send your material, dimensions, quantity per design and artwork status so we can confirm the sample plan.
What evidence should be agreed before approval?
Confirm the specification, sample approval, relevant trial results and acceptance criteria. For regulated applications, identify the market, intended use, document issuer and scope.
Prepare your packaging request
Send the product, target fill, storage or shipping conditions, filling method, quantity per design and destination. Include a sample or drawing if available. Configure quad-seal bags and request a quote.
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