Switching to a new packaging foam — whether for sustainability, cost, or regulatory reasons — is a significant decision. The right way to de-risk it is to test physical samples before committing to a volume order. Yet many packaging buyers do not have a structured process for requesting, testing, and documenting foam trials.
This guide covers the practical steps: what to ask for, which tests to run in-house, what a supplier should provide, and how to build the internal documentation that gets new materials approved.
What to ask for when requesting samples
A useful foam sample request should specify three things: the application (what product the foam will protect), the format you want (sheets, cut-to-size inserts, or moulded parts), and the performance requirement (density range, compressive strength, or a comparable incumbent material).
For initial screening, flat sheets in multiple grades are the most practical format. They allow you to compare materials side by side and cut test pieces to fit your existing packaging moulds. A good sample kit should include:
- One sheet per grade at a standardised thickness (typically 25–50 mm)
- Technical Data Sheet (TDS) for each grade with density, compressive strength, thermal conductivity, and moisture absorption
- Safety Data Sheet (SDS) for materials compliance and customs documentation
- Compostability or recyclability certification where applicable
Note on bio-based foams: If you are evaluating a material for EU PPWR compliance, ask specifically for documentation of the bio-based content percentage and the composting standard it has been tested against (EN 13432 for industrial compostability is the most common EU reference).
The four grades in a SargasFoam sample kit
SargasFoam supplies four standard grades, each optimised for a different application segment. Understanding their differences helps you run targeted tests rather than a generic evaluation:
- SF-F01 Standard Protective (18–22 kg/m³) — general e-commerce and retail void fill; equivalent to standard EPS bead board
- SF-F02 High-Density Structural (28–35 kg/m³) — electronics, heavy goods, and industrial inserts where higher compressive strength is needed
- SF-F03 Flexible Form-Fit (12–16 kg/m³) — cosmetics and beauty packaging inserts, soft goods, form-fitting applications
- SF-F04 Premium Thermal (20–26 kg/m³) — food and pharma cold-chain packaging where thermal insulation performance matters
Which tests to run in-house
You do not need a laboratory to run a meaningful first-pass evaluation. The following tests can be performed with standard warehouse or packaging-line equipment:
| Test | What to measure | Equipment needed |
|---|---|---|
| Drop test | Does the foam absorb impact without cracking or compressing permanently? Simulate a 1 m drop with your product inside. | None — manual drop from 1 m onto a hard floor |
| Compression set | How much does the foam recover after sustained load? Place a weighted object on a sample for 24 hours and measure thickness before and after. | Ruler, a weight representative of your product |
| Weight comparison | Compare the weight of a same-volume piece against your current material. Bio-based foams in the 18–22 kg/m³ range are close to standard EPS. | Kitchen or postal scale |
| Cutting / machinability | Can you cut the material cleanly with your existing foam cutter or a hot wire? Check for crumbling or edge quality. | Your existing foam cutting equipment |
| Moisture exposure | Leave a sample in a humid environment (or briefly wet the surface) and check for dimensional change, softening, or odour. | None — room humidity or a damp cloth |
Step-by-step: from request to internal approval
What a good supplier should provide
Beyond the physical samples, a reliable packaging foam supplier should be able to provide technical support throughout your evaluation. Before you commit to a trial order, confirm that your supplier can offer:
- TDS and SDS for all grades, including third-party test results where available
- EN 13432 or equivalent compostability documentation (for bio-based materials)
- A named technical contact who can answer questions about processing or performance
- Lead time and MOQ (minimum order quantity) for production volumes
- Pricing on a per-kg or per-m³ basis so you can model landed cost accurately
On PPWR documentation: From 2030, packaging placed on the EU market must meet recyclability or compostability targets. If you are building a supplier list now, ask for a written confirmation of which PPWR pathway the material meets. This saves significant work at the compliance deadline.
Ready to request your SargasFoam sample kit?
Choose from 4 grades — Standard Protective, High-Density Structural, Flexible Form-Fit, and Premium Thermal. €50 per kit, shipped worldwide, with TDS and SDS included.
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