Quad-Seal Bag Packaging
Four sealed edges give the bag a sharp, upright shape. Our VGT series makes quad-seal bags with or without a back seal, and with a one-way degassing valve.
Made on: VGT Series
What Is a Quad-Seal Bag?
A bag with all four vertical edges sealed, formed from rollstock film.
How it is made
- 01
Film
Film unwinds from the roll
- 02
Bag forming
The film is formed into the bag shape
- 03
Vertical edge seals
All four edges are sealed
- 04
Filling
Product drops in from the weigher or filler
- 05
Horizontal sealing
Top and bottom seals
- 06
Finished quad-seal bag
Ready for inspection and packing
The exact bag shape depends on the version you choose: with or without back seal, with or without a valve.
Machine and Bag Versions
Three versions run on the VGT series.
With back sealQuad-seal bag
Without back sealQuad-seal bag
One-way valveQuad-seal bagWhy the VGT
Built for quad-seal bags. Front panel 70–300 mm, side gusset 30–100 mm, bag length 100–400 mm, up to 80 bags/min.*
View VGT*Machine maximum. Actual output depends on product, fill weight, bag size, film and configuration.
Options, chosen for the project
- Gas flush
- Product settler
- Static elimination
- Bag deflators
- Degassing valve applicator
- Zipper applicator
- Ultrasonic sealing jaws
- Flat-bottom bag assembly
Where Quad-Seal Bags Fit
Products already running in this format on our machines.
Nuts
Breakage, oil and seasoning, and giveaway on a costly product.
Snacks
Fragile, light chips, seasoning and the right headspace in the bag.
Powder
Flow, dust in the seal, dripping after the dose and air in the bag.
Grains and Cereals
Many products on one line: small seeds, dust and carryover between products.
Rice
Broken grains, dust and large fill weights, in pouches or bags.
Dry Pet Food
Dust, broken kibble, fat-coated pieces and large fill weights.
Whole and ground coffee are also listed for the VGT. Each product is tested before the setup is fixed.
Define the Real Package
Send the product and the package you want. We test them before the configuration is fixed. The test is free; you cover the shipping of your samples.
What to define
Product
Target fill weight
Bag version
Front panel, gusset and length
Film
Options you need
Required output
What the test checks
Bag forming
Edge seal quality
Product drop and settling
Product in the seal
Horizontal seal quality
Options, if fitted
Sustainable good output
Photo: quad-seal bag from a VGT run in our workshop.
Output Depends on More Than the Bag
80 bags/min is the VGT's machine maximum, not a quad-seal line result. The line runs at the pace of its slowest stage, so we check every stage.
We set the final line target from product tests and agreed FAT conditions.
Request a Packaging Test- 01
Product feed
A steady flow to the weigher or filler
- 02
Dosing
Enough sustainable doses per minute
- 03
Bag forming
Stable bag shape
- 04
Edge sealing
Clean, consistent edge seals
- 05
Product settling
Product down before the top seal
- 06
Horizontal sealing
Enough good bags per minute
Other Packaging Formats
Choose the package around the product and how it will be sold.
Related Pages
The machines, industries and services behind this format.
Which machine makes quad-seal bags?
The VGT series.
Do I need a back seal?
Both versions run on the VGT. The choice follows the look of the pack and the film.
Does every quad-seal bag need a degassing valve?
No. The valve is fitted only where the product needs it.
Is a quad-seal bag the same as a flat-bottom bag?
No. The flat-bottom bag assembly is a separate option on the VGT.
Which options are available?
Gas flush, product settler, static elimination, bag deflators, degassing valve and zipper applicators, ultrasonic sealing jaws and a flat-bottom bag assembly. They are chosen for your product and package.
Start With Your Product
Send the product, target weight, package, film and required output. We use them to define the packaging route and the test plan.
- 01Product
- 02Target weight
- 03Bag version
- 04Output
We reply within 1 working day.
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Quad-Seal Bag Packaging
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