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©Copyright 2016 JOYFUN Food
Views: 100 Author: Site Editor Publish Time: 2026-05-12 Origin: Site
For frozen spring rolls and similar frozen snacks， great taste at the factory is only the beginning. Whether consumers finally enjoy a “crispy， intact wrapper” largely depends on temperature control during cold chain logistics. This “last mile” is often the most overlooked yet most problematic link for many exporters.
I. Why Is Temperature Control So Critical？
Spring roll wrappers are mainly made of flour and water. After quick‑freezing， countless tiny ice crystals form. The ideal frozen temperature （-18°C or lower） keeps these ice crystals stable， supporting the crispy structure.
Once temperature fluctuates：
Rise above -12°C： Small ice crystals melt and recrystallize into larger ones， puncturing the wrapper‘s structure.
Consequences： Cracked wrappers， oil absorption and sogginess after frying， sticky texture.
Even worse： Repeated freeze‑thaw cycles encourage microbial growth， making the product unusable.
Simply put： Unstable temperature = lost crispiness.
II. 6 Key Nodes in the Full Cold Chain
| Node | Requirement | Common Risk |
|---|---|---|
| 1. Factory quick‑freezing | Below -35°C, core temp reaches -18°C | Insufficient freezing → oversized ice crystals |
| 2. Cold storage | -18°C constant, deviation ≤±2°C | Frequent door opening, equipment failure |
| 3. Refrigerated truck | Pre‑cool to -18°C before loading, full temp recording | Long loading time, truck not pre‑cooled |
| 4. Port yard | Frozen container plugged in, temp maintained | Port congestion, power outage |
| 5. Sea freight | Reefer container set to -18°C | Equipment failure, wrong temperature setting |
| 6. Destination delivery | Customer cold room → supermarket freezer → home freezer | Last link has the highest break rate |
III. Three Most Common Temperature Loss Scenarios
Scenario 1： Excessive loading time
A refrigerated truck left open for one hour can warm from -18°C to -5°C. Even if it cools down again after closing， the product surface has already undergone partial melting.
Solution： Adopt “pre‑cooled truck + fast loading”。 Stage cargo on the cold dock beforehand and complete loading within 30 minutes.
Scenario 2： Wrong container temperature setting
One exporter set frozen spring rolls to -18°C， but the carrier mistakenly set it to -10°C. The entire container was scrapped upon arrival.
Solution： Request a temperature confirmation from the carrier and install independent data loggers inside each container for full traceability.
Scenario 3： Supermarket freezer temperature below standard
Many open‑display supermarket freezers actually run at -10°C to -12°C， not meeting the -18°C standard.
Solution： State “Keep below -18°C” on the packaging and advise the use of doored freezers. Also consider developing a “freeze‑thaw resistant” wrapper formula.
IV. Three Actions to Protect the Last Mile
Invest in temperature monitoring devices
Place at least two data loggers per container （one in the product center， one at the door）。 Ensure data is exportable and tamper‑proof for quality traceability.
Choose a professional cold chain logistics partner
Don’t focus only on freight rates. Evaluate whether the logistics provider has frozen food experience， offers temperature reports， and has emergency response plans.
Include temperature responsibility clauses in contracts
Clearly allocate liability： logistics provider is responsible for temperature issues during transit; importer is responsible after discharge at destination. Avoid finger‑pointing disputes.
Final summary：
Cold chain is not a cost – it is an investment. Controlling temperature protects the crispiness of your spring rolls， and with it， the reputation of your brand. The last mile deserves serious attention from every exporter.
