Packaging material compatibility guide
Plan bottle, pouch, closure, label and film trials around the actual product, production line and acceptance criteria.
A pack can meet a material brief and still fail in filling, sealing, capping, labelling, storage or transport. Compatibility is therefore a controlled engineering decision. It combines supplier data with representative samples, an agreed trial method and acceptance criteria that reflect normal production.
Define the use case before choosing the material
Record the product, pack quantity, target shelf life, distribution route, storage and consumer use. For liquids, include viscosity, density, foaming, oils, solvents, pH where relevant and fill temperature. For powders and solids, include bulk density, particle size, dust, oil, flow and settling. Identify oxygen, moisture, light, aroma, chemical, puncture or pressure requirements.
Separate mandatory requirements from preferences. A fixed neck finish imposed by an existing capper, a maximum pack diameter imposed by conveyor guides, or a required barrier for shelf life is different from a preference for colour or finish. This helps the trial test the variables that can change without losing the essential function.
| Pack element | Compatibility points | Typical evidence or trial |
|---|---|---|
| Bottle or rigid container | Resin or material, wall distribution, dimensions, neck finish, stability, panel strength, temperature and product contact. | Drawing, material declaration, filled storage trial and line-handling trial. |
| Pouch or flexible film | Layer structure, barrier, sealant, thickness, friction, gusset, zipper, spout, valve and seal contamination. | Structure declaration, seal-window trial, leakage or integrity test and machine trial. |
| Cap or dispensing closure | Thread or finish, liner, bore seal, tamper band, torque, valve, spring, gasket and dip tube. | Component drawings, application/removal tests, leakage and dispensing trial. |
| Label | Face stock, adhesive, pack surface, curvature, application temperature, condensation, chemicals and abrasion. | Construction data, peel or adhesion observation, environmental conditioning and labeller trial. |
| Shrink film | Polymer and grade, gauge, width, fold, seal window, shrink curve, product heat sensitivity and load. | Film data, controlled sealer/tunnel settings, appearance and distribution trial. |
| Secondary pack | Case or bundle geometry, compression, containment, pallet pattern and transport route. | Packing-line trial and agreed handling or transport test. |
Sample and trial plan
- Freeze the samples. Identify the product code, batch, drawing revision and quantity of every component.
- Use representative contents. Use the actual product where safe and practical, or agree an equivalent that reproduces the relevant viscosity, density, dust, temperature or chemical behaviour.
- Set the equipment condition. Record machine, tooling, guides, recipes, temperatures, pressures, torque settings and line speed.
- Run enough cycles. Include start-up, normal running, replenishment and changeover behaviour rather than assessing only one hand-made pack.
- Inspect at defined points. Check immediately after packing and after any required conditioning, storage, transport or opening interval.
- Approve against written criteria. Retain accepted samples, results, settings and deviations.
Filling and dosing
Container opening, headspace, foam, drips, static, dust and product settling affect filling. Confirm the fill range and accuracy method under stated product and speed conditions. A change in bottle shape or pouch stiffness can affect presentation to the fill head; a change in product temperature can affect viscosity, foam or seal contamination. Measure the complete process rather than assuming the filler alone determines the result.
Capping, sealing and closure application
For screw caps, establish neck and cap compatibility, cap feeding, application torque, removal torque, liner or bore-seal performance and tamper-band engagement. For induction foils, verify bottle neck, cap, liner, foil, product and induction settings as one system. For pouches and films, define the sealing window and check the effect of product in the seal area, web tension, dwell and cooling. Record the method used to judge seal integrity.
Labelling, coding and inspection
Labels must match the pack surface and use environment. Automatic application also needs the correct roll format, label pitch and dispensing behaviour. Confirm code position, contrast, adhesion or cure and legibility after normal handling. Where cameras, barcode readers, checkweighers or metal detectors are used, include the final material and artwork in the test because reflectivity, colour, shape or foil can affect detection.
Upstream and downstream integration
Check how empty packs are fed, accumulated and oriented; how filled packs transfer between machines; and how rejects are controlled. Bottle stability, pouch presentation, cap supply, label roll changes, film threading, case dimensions and pallet pattern all influence sustained output. Define buffers and line control so that one machine stopping does not create damage or uncontrolled product.
For packaging machinery integration beyond the materials catalogue, Lancing's specialist machinery information is available from Lancing UK. The material and machinery specifications should reference the same approved samples.
Cleaning, changeover and operator access
Review contact parts, spill or dust capture, tool-free adjustments where present, access for cleaning, safe removal of rejected packs and the time required to change formats. A new pack may need different guides, stars, pucks, chucks, fill nozzles, seal jaws, label positions or tunnel settings. Include these items in the quotation rather than treating them as commissioning surprises.
Acceptance criteria
Functional
- Correct fill, dose or pack count under stated conditions.
- Seal, closure, leakage and opening performance.
- Label, code and visual presentation.
- No unacceptable product damage, contamination or loss.
Production
- Agreed output with the named product and format.
- Reject, rework and stoppage boundaries.
- Changeover and cleaning requirements.
- Operator access, controls and downstream transfer.
Every verified number should be tied to the trial conditions: product, pack, machine settings, sample quantity and inspection method. If a figure is not supported by a test or supplier specification, keep it out of the approval record and quotation.
Inputs for a Lancing review
- Pack and component samples, drawings and supplier specifications.
- Actual product or an agreed safe equivalent and its relevant characteristics.
- Existing machine details, photos or video, tooling and current accepted pack.
- Output, batch size, annual volume, changeover range and operator method.
- Quality, seal, leakage, appearance, code and transport acceptance criteria.
- Environmental evidence and proposed claim wording for the exact pack.