Retail ice substitute packs: formulation and label claims
What goes into a gel ice pack, why the glycol and polymer ratio decides thaw time, how freeze-thaw cycling exposes cheap packs, and which claims invite trouble.
What goes into a gel ice pack, why the glycol and polymer ratio decides thaw time, how freeze-thaw cycling exposes cheap packs, and which claims invite trouble.
A 420 g/g SAP shed 8.4 percent of its water after 40 freeze-thaw cycles; a 280 g/g grade shed 1.9. What to specify instead of free-swell absorbency.
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