Doypack Bag
Also called: stand-up pouch, Doy pouch, doypack pouch
A doypack bag is a stand-up flexible pouch defined by its rounded oval bottom gusset — the curved panel at the base that expands outward when the pouch is filled, pushing the bottom into a stable teardrop footprint. Once filled, the pouch stands on its own on a retail shelf without secondary packaging, which is the single feature that has driven the format's 60-year dominance of premium shelf-ready flexible packaging.
The format was invented in 1963 by French engineer Louis Doyen, whose company Thimonier originally trademarked the Doyen (and later Doypack, then Doypack) name. The patent has long since expired, and today 'doypack' is used generically across the packaging industry to describe any oval-bottomed stand-up pouch — though the trademark is still defended in some jurisdictions. In common B2B usage, 'doypack' and 'stand-up pouch' (SUP) are used interchangeably to refer to the same format.
Doypacks are produced on horizontal form-fill-seal (HFFS) premade-pouch machinery. Pre-made pouches (with the oval bottom already welded) are pulled from a magazine, opened with vacuum suction cups, filled with the product, and sealed at the top — typical cycle rates are 30 to 60 pouches per minute. The format accommodates a wide range of add-ons: zippers for recloseability, spouts and caps for pourable liquids, and one-way degassing valves for fresh-roasted coffee. That flexibility, combined with large flat front and back panels for premium graphics, has made doypack the format of choice for premium snacks, dried fruit, pet treats, coffee, nutraceuticals and baby food — anywhere a brand wants a product to stand tall and look substantial on shelf.
Specifications
| Common materials | PET/PE, PET/AL/PE, transparent + matte |
| Width range | 80–250 mm |
| Length range | 120–350 mm |
| Filling range | 50–1000 g |
| Production method | HFFS premade-pouch (with optional zipper / spout / valve) |
Common applications
- ▸Premium snacks
- ▸Dried fruit
- ▸Nuts
- ▸Pet treats
- ▸Coffee (with one-way valve)
- ▸Sauces & pastes
- ▸Nutraceuticals
- ▸Baby food
Pros & cons
Advantages
- ✓Iconic stand-up shape — teardrop footprint stands unaided on shelf
- ✓Optional zipper / spout / valve add-ons configured per product
- ✓Large flat printing area for premium branding and graphics
Limitations
- ✗Higher per-unit cost than pillow — premade pouch + HFFS cycle
- ✗Requires HFFS premade-pouch machinery, not VFFS
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Frequently asked questions
What is a doypack bag?
A doypack is a stand-up flexible pouch with a distinctive rounded oval bottom gusset that expands when filled, letting the pouch stand upright on a retail shelf. Invented by Louis Doyen in 1963 and originally trademarked under the Doyen name, the format has since become generic and is now the dominant shelf-ready flexible pack worldwide.
Doypack vs stand-up pouch — are they the same?
In common usage yes. 'Stand-up pouch' (SUP) is the generic category name and 'doypack' is the most recognizable variant within it — characterized by the rounded bottom gusset. Technically other formats (quad-seal, block-bottom) also stand up, but in B2B sourcing 'doypack' and 'stand-up pouch' typically refer to the same oval-bottomed pouch.
Can doypacks have zippers or spouts?
Yes — all three common add-ons are available. A zipper seal can be welded inside the top edge for recloseability. A rigid spout and screw cap can be sealed into a pre-punched hole for pourable liquids. And a one-way degassing valve is standard on coffee doypacks to vent CO2 without letting oxygen in. Each add-on requires a configured insertion station on the HFFS line.
What's the difference between doypack and quad-seal?
The stand-up geometry differs. A doypack uses a single rounded oval bottom gusset that pops outward when filled, producing a teardrop footprint. A quad-seal uses four vertical corner seals that push the gussets flat into a rectangular footprint. Doypack is simpler and cheaper to tool; quad-seal delivers a more box-like, premium profile with a wider stable base.