–21°C Cooling packs
–21 °C cooling packs – stable cooling for demanding transport processes
–21 °C cooling packs are specifically designed for temperature-controlled shipping in the deep-freeze range. They provide consistent and controlled cooling over defined periods and are particularly suitable for transporting food, pharmaceutical products, and sensitive samples. Compared to dry ice, they offer significantly easier handling, as they are neither classified as hazardous goods nor require special safety measures. By using eutectic cooling media, a reliable temperature range of approximately -21 °C is maintained throughout the transport process.
Benefits at a glance
- ✔ Defined temperature range at approx. -21 °C
- ✔ Suitable for temperature-controlled shipping in food and pharmaceutical logistics
- ✔ Non-hazardous goods – easy integration into standard shipping processes
- ✔ Reusable and cost-efficient for regular use
- ✔ Consistent cooling performance through eutectic technology
–21 °C cooling packs – stable cooling for demanding transport processes
–21 °C cooling packs are specifically designed for temperature-controlled shipping in the deep-freeze range. They provide consistent and controlled cooling over defined periods and are particularly suitable for transporting food, pharmaceutical products, and sensitive samples. Compared to dry ice, they offer significantly easier handling, as they are neither classified as hazardous goods nor require special safety measures. By using eutectic cooling media, a reliable temperature range of approximately -21 °C is maintained throughout the transport process.
Benefits at a glance
- ✔ Defined temperature range at approx. -21 °C
- ✔ Suitable for temperature-controlled shipping in food and pharmaceutical logistics
- ✔ Non-hazardous goods – easy integration into standard shipping processes
- ✔ Reusable and cost-efficient for regular use
- ✔ Consistent cooling performance through eutectic technology
How –21 °C cooling packs work
–21 °C cooling packs are based on so-called eutectic cooling media, whose freezing and melting points are precisely adjusted to a defined temperature range. In this case, the phase change occurs in the deep-freeze range, ensuring that a nearly constant temperature is maintained during the thawing process. This physical property enables controlled and uniform heat absorption, significantly reducing temperature fluctuations during transport.
In contrast to conventional cooling packs, which are typically water-based and operate around 0 °C, eutectic systems provide significantly more precise temperature control. This makes –21 °C cooling packs particularly suitable for applications where strict temperature tolerances must be maintained.
Advantages compared to dry ice
While dry ice reaches extremely low temperatures of approximately -78.5 °C, –21 °C cooling packs operate within a more moderate and controllable temperature range. This reduces the risk of freeze damage to sensitive products and allows for more targeted cooling. In addition, cooling packs do not release gases, meaning no special ventilation or additional safety measures are required.
Another key advantage is reusability: –21 °C cooling packs can be refrozen and reused multiple times, making them both more economical and more sustainable than single-use cooling solutions.
Practical use in logistics and shipping
In practice, –21 °C cooling packs are used in combination with insulated packaging systems such as EPS boxes or paper-based insulated packaging to ensure a stable cold chain over defined periods. They are suitable for both domestic and international shipments and can be flexibly adapted to different logistics requirements. Especially in standardized processes, they offer reproducible results, as cooling performance and duration can be precisely planned.
However, the actual temperature profile during transport is not determined by the cooling pack alone, but by the interaction of all components within the cooling system. A stable cold chain can only be achieved when these factors are properly aligned:
- Cooling pack (quantity, initial temperature, and placement within the package)
- Packaging (insulation performance and system design)
- Product (mass, temperature, and thermal properties)
- Environment (transport duration, ambient temperature, and logistics conditions)
A precise coordination of these parameters ensures reproducible results and guarantees that temperature-sensitive products remain reliably cooled, even over extended transport durations.
Typical applications include the shipment of frozen food, medical samples, vaccines, and pharmaceutical products. They are also widely used in gastronomy and catering to maintain consistent cooling during transport and temporary storage.
Efficiency, sustainability, and process reliability
Thanks to their robust design and durable materials, –21 °C cooling packs are suitable for long-term use. They can be easily prepared, stored, and reused, enabling efficient and standardized processes. At the same time, they help reduce packaging waste and operating costs.
In combination with suitable insulation solutions, –21 °C cooling packs provide a reliable, economical, and sustainable solution for temperature-controlled shipping in the deep-freeze range.
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