Bag Information
A Range of Bag Types
At Kenray, we understand that the right bag style is key to both product performance and shelf appeal. Whether you need a simple pillow pack for snack foods or a premium quad pouch for speciality goods, our form-fill-seal packaging formers and tooling are engineered to deliver consistent quality, maximum efficiency and a pack that reflects the value of your product. We work with leading global brands across food, drink and household sectors to develop pouch packaging solutions tailored to their products, production lines, and markets.
Block Bottom Pouch
The block bottom pouch features a flat rectangular base, allowing the pack to stand upright on the shelf. This makes it ideal for retail display, particularly for products such as coffee, tea, flour and other dense or heavier goods. Its stable structure combines practicality with a premium appearance.
Doy Pack
Also known as a stand-up pouch, the doy pack has a base that allows it to sit upright and a single seal at the opening. Resealable closures are commonly incorporated, helping to maintain freshness when products are not consumed all at once. Doy packs are often chosen for liquids, granules and powders.
Gusset Bag
Similar in appearance to a pillow pack, a gusset bag includes additional film folded into the sides of the pack. This extra capacity allows more product to be packed into the available space, making it suitable for items that require greater volume without changing the outer pack dimensions.
Pillow Bag
The pillow bag is one of the most widely used formats, particularly for lighter products such as crisps and snacks. It is characterised by a simple A-to-B seal, which can be configured as left-over-right or right-over-left. Pillow bags are efficient to produce and remain a versatile option for high-volume snack food packaging.
Pouch Pack (3-Side Seal)
This pack format is created by sealing three sides of the film, with the artwork inverted so the pack is formed from the side. Pouch packs are a popular choice for spices, powders and liquids where a flat, efficient pack design is required.
Quad Pouch
The quad pouch is a premium packaging format featuring four vertical seals with distinct ‘fins’ on each corner. This creates a box-like shape while maintaining the flexibility of a pouch. With artwork space available on all four panels, quad pouches provide strong shelf appeal. They are widely used for high-end products such as speciality tea, coffee and cereals, often replacing traditional “bag in box” methods.
Seal Types
There are three primary types of vertical seals used in VFFS packaging: Lap Seal, Fin Seal, and True Fin (Pinch) Seal. Each has specific advantages and is suited for different applications.
Seal Type 1
Left Over Right Lap
Seal Type 2
Right Over Left Lap
Seal Type 3
Left Over Right Fin
Seal Type 4
Right Over Left Fin
Seal Type 5
Offset Left Over Right Fin
Seal Type 6
Offset Right Over Left Fin
Seal Type 7
True Fin
Seal Type 8
Left Over Right Lap & Left Over Right Fin
Seal Type 9
Right Over Left Lap & Right Over Left Fin
Find the Right Solution
The right bag type is about more than appearance – it’s about efficiency, performance and customer experience. With decades of expertise in form-fill-seal tooling, Kenray can help you choose the best format for your products. Get in touch with our experts today.
