BEFORE YOU BEGIN
Three things to take away.
- Shortlist a container format and material together.
- Specify the conditions the finished package must withstand.
- Approve the complete container and closure combination.
Begin with the product and its journey
Before asking which plastic is best, describe what will go inside it. Share the formulation or relevant compatibility information, fill volume, filling temperature, intended storage period and destinations. Explain how customers will handle and dispense the contents. A narrow-neck bottle and a wide-opening pail answer different access needs even when both hold the required volume.
Separate essential requirements from preferences. An existing capper, a customer’s dispensing connection or a fixed carton footprint may constrain the choice more than a preferred colour or silhouette.
Use material families to build a shortlist
HDPE means high-density polyethylene, PET means polyethylene terephthalate, and PP means polypropylene. These names identify polymer families, not a finished packaging specification. LyondellBasell’s container portfolio includes several polyethylene and polypropylene grades and processing routes, illustrating the choices that sit within a material family.
Within Polytainer’s published range, HDPE appears in bottles and jerrycans, PP in pails, and PET in preforms and customised bottles. Start with the format that suits the task, then ask the team to confirm the proposed grade, construction and components. Do not transfer an approval from one format to another simply because the resin name matches.
Make the filling process part of the brief
If a product is filled hot, state the actual fill-and-cool cycle and request evidence for the proposed bottle construction. Producers publish PET solutions specifically developed for hot-fill and heat-set processing. Treat that performance as a requirement to verify for the selected package, rather than something the letters PET establish on their own.
Also record how the container moves through filling, capping, labelling and packing. Give the supplier the relevant equipment interfaces and drawings so the discussion covers the production line as well as the material.
References: [2]
Turn a shortlist into an approval
Compare samples against the same written requirements. Agree who will assess compatibility, package integrity, dispensing and appearance, and under which conditions. Include the proposed closure, liner, label and secondary packaging in the review.
Record the exact combination approved and the evidence behind the decision. For food-contact or other controlled applications, request documentation covering the intended use and market. A generic material description is not a substitute for that application review.
PUT IT INTO PRACTICE
Your next-step checklist.
Bring these points to your packaging discussion.
- What is the formulation, fill volume and intended storage period?
- Which filling temperatures and equipment interfaces must be accommodated?
- How will the product be carried, opened and dispensed?
- Which container, closure and liner will be evaluated together?
- What evidence and acceptance criteria are needed before ordering?
Sources & further reading
References support the specific points noted above. Confirm the requirements that apply to your product, market and intended use.
- LyondellBasell — container resins and applications (opens in a new tab)
Describes polyethylene and polypropylene families, grades and processing routes for rigid containers.
- Eastman — PET food and beverage applications (opens in a new tab)
An example of PET materials developed for specified hot-fill and heat-set applications; it does not identify a resin used by Polytainer.
- Polytainer — published product range (opens in a new tab)
Source for the materials and container families offered in the published catalogue.
EXPLORE THE POLYTAINER RANGE
