In brief
With flow-pack packaging you gain:
• a steady rate at high speeds,
• low unit costs on large volumes,
• a reliable seal even when the fill weight varies over time,
• a large communication area (front + side), an optional window and easy-open notch.
Doypack with a zip — when convenience and display matter
You choose doypack packaging with a zip (zip/slider) when repeated opening, standing display and a premium 'feel' matter. This solution often competes with flow-pack — but it differs in function and in user expectation.
Doypack with a zip vs. flow-pack — a quick comparison
• Cost/output: flow-pack — cheapest and fastest
• doypack — pricier, but with a re-seal function.
• Use: doypack — convenient reclosing (granola, pet food, powders)
• flow-pack — an easy-open notch.
• Appearance: both give a strong front; a doypack makes a window, matt/soft-touch and premium accents easier.
• Barrier: depends on the structure (BOPPmet, coatings, PET); we will match it in both formats.
Stability on the line — COF, SIT and hot-tack in practice
Regardless of the format:
• we set the COF for your web path (rolls, tables, tube) to reduce micro-stops.
• SIT/hot-tack (usually through CPP in the seal layer) guarantee that the seal grips at a lower temperature and holds under the pull.
Thicknesses and tolerances: an even wind, clean edges, less waste at start-up.
Flow-pack packaging: roll-out step by step
• Brief: product, barrier (OTR/WVTR), speed, the expected 'look'.
• Structure proposal: mono PP/PP or barrier; add-ons (anti-fog, perforation).
• Prepress: no-print, white, matt/gloss; a proof for approval.
• Pilot: a short run on your settings; adjustment of COF/SIT/hot-tack.
• Delivery start: consistent batches, consistent colour, full traceability.
Summary — flow-pack packaging and doypack with a zip.
Do you need maximum speed and low cost (flow-pack) or the convenience of re-seal and premium display (doypack with a zip)? We will design the material for your product and line: from mono PP/PP through barrier versions to multi-colour print and matt/gloss finishes. We will set the COF, SIT and hot-tack, run a pilot and supply stable batches.
Take the next step:
• Order a free consultation and specification (structure, barrier, COF, features).
• Order samples and a test run to confirm the parameters on the machine.
• Get a fast quote and a delivery schedule that keeps to the calendar.
Write or call — we will reply quickly and to the point.
Frequently asked questions
Flow-pack packaging is flexible packaging made most often from single- or multi-layer films, formed and closed with a longitudinal seal and transverse seals. This type of solution makes it possible to achieve high packing output, good tightness and matching of the pack parameters to the properties of the packed product.
The production of flow-pack packaging uses, among others, PET, PE, PP and BOPP films and multi-layer laminates with barrier layers. The choice of material structure depends on the requirements for mechanical resistance, barrier against moisture, oxygen, grease or aromas, and on the type of packaging machine and the sealing method.
Flow-pack packaging can be designed with specific barrier properties that protect the product against external factors. Depending on the structure used, it is possible to increase the barrier against oxygen, water vapour, light or odours, which is particularly important for food products that need to keep their freshness and stability.
Yes, flow-pack packaging can be printed using flexographic technology, which makes it possible to achieve high graphics quality while maintaining suitable production parameters. Flexographic printing allows the application of product markings, brand identity elements, codes, legal information and graphics matched to the requirements of a specific sector.
The correct choice of flow-pack packaging depends on many technical parameters, such as the weight and shape of the product, its sensitivity to moisture and oxygen, the required durability, the transport method and the storage conditions. The operating parameters of the packaging machine, the seal temperature, the packing speed and the requirements for the aesthetics of the finished pack also matter.
Sounds like your project?
Write or call — our technologist will advise on the structure and quote your volume within 24 hours.
Free quote +48 731 819 963