Up to 7x longer cold-hold than standard ice — and a meaningful drop in your per-shipment refrigerant cost.
Cryophase’s reusable 4-ply dry ice packs are built to solve a specific failure mode in cold chain logistics: most gel packs are 80–90% water by mass, which means they’re heavy to freight, slow to freeze solid, and prone to sweating as soon as the internal temperature climbs back toward 0°C. Our packs ship as flat, lightweight sheets — four bonded layers of food-grade plastic and textile wrapped around a high-capacity absorbent polymer. Submerge the sheet in water and the polymer core hydrates into a dense, uniform gel that holds its shape under sub-zero conditions without the structural breakdown you get from a simple water-ice block.
Before finalising this formulation, we benchmarked a wide range of competing dry ice packs already on the market and found consistent failure points: incomplete hydration even after extended soaking, slow water uptake that made same-day activation impractical, and gel breakdown into a slimy residue partway through the thaw cycle — a genuine contamination risk when packed against food or pharmaceutical goods. Cryophase’s 4-ply construction was engineered specifically against those failure modes: rapid, complete hydration; a stable gel structure through the full freeze-thaw cycle; and a dual-sided plastic coating that lets the same pack be refrozen and reused without degrading.
That reliability is why Cryophase packs are now specified by supermarket chains, online grocery delivery operators, pharmaceutical distributors, frozen food suppliers, and seafood exporters. The food-grade laminate means direct contact with perishable goods is compliant, not just tolerated.
Thermally, these packs aren’t limited to cold-side use. Frozen in a standard domestic freezer, the gel reaches as low as –21°C and holds that temperature roughly seven times longer than an equivalent gel pack — a function of the polymer’s latent heat capacity relative to plain water ice. The same pack can be microwaved or steamed to run the cycle in reverse, making it equally useful for warm food transport or therapeutic heat application.
The mass-to-performance ratio is where the freight economics shift meaningfully: 1,000 standard 1kg gel ice packs is a full kilotonne of dead weight to ship. The same 1,000 units in Cryophase dry ice pack format weigh under 40kg combined before activation — a freight cost difference that compounds fast at scale.