أيّ 24-Cell Dry Ice Pack Fits Your Container Best?
اختيار الحق 24-cell dry ice pack can make or break your shipment’s success. Within the first few minutes of reading, you’ll know exactly how to size, علية, and handle dry ice sheets—no guesswork. A single 24-cell sheet typically cools 5–8 L of container space for 24 ساعات, but proper planning can double that duration while reducing waste and ensuring safety.
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Identify the best dry ice pack size and number of 24-cell sheets for any container.
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Estimate dry ice weight (5-10 رطل/يوم) للممرات المجمدة.
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يتبع safe packing and venting practices.
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Learn hybrid cooling strategies for cost efficiency.
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يتقدم 2025 الاتجاهات in smart packaging and eco-design.
How many 24-cell dry ice packs do you need?
ابدأ مع 1 sheet per 5–8 L of internal volume for ~24 hours of hold time. ل 20 L shipper, use three sheets; ل 30 ل, four sheets. Each sheet delivers roughly 8–12 hours of chilled performance—extend by wrapping around the payload or combining with solid CO₂.
| Container Volume (ل) | Starting Sheets | عقد نموذجي (مبردة) | ماذا يعني هذا بالنسبة لك |
|---|---|---|---|
| 5-10 | 1 | 8–24 h | Small mailers or compact boxes |
| 15-20 | 2–3 | 24-48 ح | Most DTC food or pharma parcels |
| 25-30 | 3–4 | 36-60 ح | Large payloads needing extra margin |
| 40+ | 4–6 | 48-72 ح | Extended lanes or high ambient routes |
قاعدة سريعة: Add one sheet for every extra 24 hours of shipping or every +10 °C ambient increase.
Fast sizing formula (for SOPs)
مثال:
أ 20 L insulated box on a 36 h route in summer:
20 L ÷ 7 ≈ 3 أوراق + 1 (hot weather) = 4 المجموع.
How does insulation affect your dry ice pack count?
كلما كان العزل أفضل, the fewer packs you need. EPS foam maintains cold longest, while cardboard liners need extra help.
| Container Type | Insulation Rating | Recommended Dry Ice | Real-World Insight |
|---|---|---|---|
| EPS (الستايروفوم) | ممتاز | 5 رطل / 24 ح | Ideal for biopharma & الأطعمة المجمدة |
| Plastic Crate | جيد | 6-7 رطل / 24 ح | Works for DTC food delivery |
| كرتون + بطانة | معتدل | 8–9 lb / 24 ح | Add 1–2 sheets for warm lanes |
نصيحة: Pre-chill your box before packing. Cold walls keep sheets efficient.
How to calculate dry ice weight for frozen shipments
For frozen lanes (−20 °C or colder), يستخدم solid CO₂ dry ice measured by weight:
صيغة:Dry Ice (lb) = Hold Days × 7.5 (lb/day) × (1 + 0.2 reserve)
مثال: 2 days × 7.5 = 15 رطل + 20% = 18 lb total.
| عقد الوقت | Tight EPS Shipper | Typical Cooler | Loose Cooler |
|---|---|---|---|
| 24 ح | 5 رطل | 7.5 رطل | 10 رطل |
| 48 ح | 10 رطل | 15 رطل | 20 رطل |
| 72 ح | 15 رطل | 22.5 رطل | 30 رطل |
استخدم lower end for dense EPS foam and the higher end for thinner boxes or hot climates.
When to use 24-cell sheets vs. CO₂ الصلبة
| استخدام الحالة | Best Refrigerant | لماذا يعمل | Watch Out For |
|---|---|---|---|
| 0–8 °C chilled goods | 24-cell dry ice pack | مرن, non-hazmat, قابل لإعادة الاستخدام | Shorter hold time |
| ≤ −20 °C frozen lanes | CO₂ الصلبة (الثلج الجاف) | Deep cold, long duration | Requires labeling & تنفيس |
| 36–60 h mixed loads | Hybrid setup | Combine sheets + small CO₂ slab | Needs training & SOP |
Real-world case: A biotech shipper swapped block ice for 24-cell sheets in EPS boxes and cut spoilage 22% while reducing packing time 40%.
Safe packing SOP for 24-cell dry ice sheets
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Hydrate fully in warm water until bubbles stop.
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تجميد شقة for 24–48 h at ≤ −18 °C.
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Pre-chill both product and shipper.
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Wrap & cap: line sides and top for 360° coverage.
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Vent properly—never seal solid CO₂ airtight.
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ارتداء القفازات to avoid frost burns.
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Label UN 1845 if any solid CO₂ is included.
دراسة حالة: A meal-kit brand reduced summer warm-arrival issues by one-third after adopting wrap-and-cap packing.
2025 trends in dry ice packaging
The cold chain industry is embracing ذكي, مستمر, and hybrid designs:
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Reusable cut-to-fit sheets reduce waste and trim along seams.
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Precision sublimation control improves CO₂ efficiency (3–8% loss/day).
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Smart temperature sensors send alerts for temperature excursions.
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Hybrid packouts mix sheets + CO₂ slabs for cost-balanced performance.
نظرة السوق: Brands adopting seasonal validation logs have cut spoilage 30–60% while lowering material waste.
الأسئلة الشائعة
س 1: Is a 24-cell dry ice pack the same as solid dry ice?
لا. 24-cell packs are polymer sheets cooling near 0 درجة مئوية; solid CO₂ reaches −78.5 °C.
Q2: How long does one 24-cell sheet last?
Around 8–12 hours per sheet; wrap with 2–4 sheets for 24–36 hours.
س 3: هل يمكنني الطيران بالثلج الجاف؟?
نعم-≤ 2.5 كجم (5.5 رطل) per passenger with venting and UN 1845 وضع العلامات. Cargo follows ها هو بي 954 for higher limits.
س 4: Can I reuse dry ice packs?
Hydrated polymer packs can be refrozen; solid CO₂ cannot—it sublimates to gas.
س 5: What’s the safe way to dispose of leftover dry ice?
Let it sublimate in a ventilated area—never seal or dump in sinks.
ملخص & التوصيات
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يستخدم one 24-cell sheet per 5–8 L of volume for 24 h chilled control.
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Add 30–40% for longer or hotter shipments.
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يستخدم 5-10 رطل/يوم of solid CO₂ for frozen lanes.
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دائماً تنفيس, ملصق, و monitor درجة حرارة.
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Validate every lane with a two-box PQ test.
الخطوة التالية: قياس الحاوية الخاصة بك, apply the formula, and test one shipment. For precise results, request a free packout review from Tempk’s specialists.
حول Tempk
مهندسي Tempk validated cold chain solutions—from flexible 24-cell dry ice sheets to hybrid CO₂ packouts. Our systems are tested for real-world lanes across food, فارما, and biotech logistics. نحن نركز على أداء, أمان, والاستدامة, helping clients reduce spoilage and cost while meeting all IATA PI 954 and UN 1845 متطلبات.
تحدث إلينا for a lane-specific dry ice strategy or a print-ready SOP today.
