Collect the material and format information needed to feed, open, form and seal the intended pouch without guessing from appearance alone.
A pouch specification should identify both the physical format and the material construction. Two pouches with the same nominal dimensions may separate, open, grip and seal differently because stiffness, surface friction, zipper bulk, spout position, sealant and supplier tolerances are different.
Provide the supplier reference, flat width and height, gusset dimensions, usable mouth below any zipper, top trim, seal band, tear notch, spout or cap position and filled reference shape. Measure more than one production pouch and retain the supplier tolerance.
Provide construction, thickness, web width, print repeat, registration mark, print and unwind direction, core dimensions, reel diameter and winding quality. State the intended longitudinal and cross-seal style and finished bag dimensions.
Ask the packaging supplier for the laminate construction, sealant layer, intended sealing guidance, food-contact declaration where applicable, barrier or product-compatibility information and any restrictions associated with printing, coatings, mono-material design or recycling claims.
The machine supplier needs enough information to identify handling and sealing risk before trial materials are ordered.
| Field | Premade pouch | VFFS reel | Machine relevance |
|---|---|---|---|
| Dimensions and tolerance | Width, height, gusset, usable opening and feature positions. | Web width, repeat and finished bag dimensions. | Magazine/former, grippers/guides, jaws, sensors and change parts. |
| Construction | Layer structure, sealant, thickness and surface finish. | Layer structure, sealant, thickness and print/coating. | Separation, tracking, forming, friction and seal process. |
| Closure feature | Zipper, spout, valve, cap, tear notch or shaped outline. | Any inline zipper or special forming requirement where applicable. | Opening, clearance, product path, top seal and station layout. |
| Print control | Preprinted pouch reference and code area. | Repeat, registration mark, print direction and code area. | Orientation, sensors, cut position, printer and inspection. |
| Supplier variation | Samples from normal production and more than one batch where possible. | Representative reels and winding condition. | Robust setup window rather than one ideal sample. |
The layer presented to the jaw and opposing seal surface determines how the package seals under the selected temperature, pressure and dwell conditions. Overall laminate thickness or the outer printed layer does not identify the correct process window by itself.
Request the pouch or film supplier’s sealing guidance and confirm it using the real machine, product and pack. Product contamination, folds, zipper ends, spout fitments, jaw condition, line speed and cooling can all affect the finished result. Do not assume that a nominal material description from another supplier will behave identically.
For seal acceptance, continue to the pouch seal-integrity and leak-testing guide.
Record zipper position, top trim, usable opening and whether production pouches arrive fully closed. The machine must open the pouch without damaging the zipper and place product below the final top-seal band.
Record spout location, angle, neck and cap geometry, pouch support point and whether filling occurs through the spout or an open top. The feature changes presentation, gripping and nozzle access.
Identify the datum used by the magazine and grippers. Confirm the outline and folds remain within tolerance when flat and filled so the pack clears every station and downstream guide.
Handling evidence is developed further in the premade pouch opening and gripper guide.
No. Dimensions are essential, but opening, stiffness, friction, laminate, sealant, zipper or spout features, supplier tolerance and product behaviour also affect the configuration and trial.
The packaging supplier and food business should confirm that the material is suitable for the intended product and conditions of use. UK guidance on food-contact materials is available from the Food Standards Agency.
Production samples include the real seals, zipper or spout application, surface finish and manufacturing variation that the machine must handle. Mock-ups can help with early layout work but should not replace the final trial material.
Any material change should be treated as a new packaging condition until forming, handling, sealing, code adhesion and finished-pack performance have been confirmed. Claims should be supported by the packaging supplier and the applicable assessment route.
Use change control. Record the new construction and batch, compare it with the approved material and repeat the checks affected by friction, stiffness, forming, sealing, coding or integrity.
Include drawings, samples, supplier information and the intended quality method so Lancing can identify handling and sealing questions before the trial.
