Gel Packs vs Dry Ice vs PCM Packs: How to Choose the Right Coolant for Cold Chain Shipping
Choosing a coolant is one of the most important decisions in cold chain packaging. حزم هلام, الثلج الجاف, and PCM packs can all protect temperature-sensitive products, لكنها ليست قابلة للتبديل. The right choice depends on the product temperature range, كتلة الحمولة, مدة الطريق, allowable freeze risk, قواعد الناقل, احتياجات التوثيق, and customer receiving experience. للمشترين B2B, the goal is not to choose the coldest coolant. The goal is to choose the coolant that keeps the product inside its required temperature range for the required time, under realistic handling conditions, with acceptable safety, يكلف, امتثال, وتجربة العلامة التجارية. Quick answer Gel packs are usually the starting point for chilled and refrigerated shipments. FedEx describes gel coolants for products that should remain between 34°F / 1درجة مئوية و50 درجة فهرنهايت / 10درجة مئوية. Dry ice is used when products must remain frozen, but it sublimates at -78.5°C / -109.3°F and requires venting, وضع العلامات, وضوابط التعامل. PCM packs are used when the packout...