Plastics
Plastics tend to be brittle at deep freezer temperatures and boxes must be handled without physical impact while cold.
- Polypropylene (PP) is one of the most suitable plastics for cold storage and recommended down to -80C.
- Polycarbonate (PC) is recommended down to -190C.
- Polystyrene (PS) is occasionally used for cryo storage containers. It is light and can maintain structural integrity at ulta-low temperatures. The bulkiness of PS is a potential drawback.
- Eastman Tritan™ is a copolyester, engineered for superior performance in cryogenetic conditions. It is a shatter-resistant yet boasts excellent clarity and colourability.
Cardboard
Treated cardboard is resistant to moisture and more durable than regular cardboard.
No brittleness temperature effect makes cardboard superior at lower temperatures down to -80C.
Metals and Metal Alloys:
Stainless steel, aluminium and some alloys are used for constructing cryogenic storage dewars and freezer racks. This provides durability and resistance to corrosion, making it suitable for long-term storage of larger quantities of samples.
Silicone and Rubber:
These materials are used for sealing gaskets and O-rings in cryogenic containers, ensuring an airtight seal to prevent moisture and contamination.
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