How should freeze-dried passion fruit be packed and loaded for export?

In 1–5 kg aluminium-foil bags, soft-vacuumed with a silica gel sachet inside, two to a 58 × 28 × 34 cm carton, and floor-loaded at about 550 cartons per 20ft container. Packed that way, the product holds 12 months at ≤25 °C and RH ≤60%, and 18–24 months in cool storage at ≤18 °C and RH ≤50%. Every one of those choices protects the same thing: a cube that is still crisp when your customer opens it. Passion fruit is acidic, high in fibre and very porous, so a weak bag, a crushed carton or a wet container ruins it faster than almost any other freeze-dried fruit.

What bag and carton should the specification name?

The carton matters as much as the bag. In a seven-layer floor stack, the bottom carton carries six cartons above it, roughly 40–60 kg, for a voyage of four to six weeks. A 5-ply BC-flute carton keeps its edges square under that load; a 3-ply carton bulges at the base and splits at the corners, and the bags inside take the crush.

Food-contact films and sachets have to meet Regulation (EC) No 1935/2004 on food contact materials for the EU; ask for the declaration of compliance with the film specification.

Why soft vacuum and not nitrogen?

Because an inflated bag costs you twice. A nitrogen-flushed 5 kg bag is a pillow: it takes more carton space, so you ship air, and it does not fit cleanly into the carton. Under seven layers of stacking, the trapped gas pushes against the foil, the creases crack, and humidity walks in through the crack. On passion fruit, a cracked bag is a soft, fused block within days. A soft-vacuumed bag lies flat, packs tight, and has nothing inside it pushing on the seal.

Of everything on a packaging specification, the film is the line buyers skip most and regret first. Metallised or standard snack film lets moisture through far faster than foil. If a supplier quotes a cheaper bag, ask for its water vapour transmission rate measured to ASTM F1249, with the test temperature and humidity stated. A WVTR figure without its conditions cannot be compared.

How many cartons fit in a container, and what does that do to freight per kilo?

Floor-loading is the default: cartons go in lengthwise, 8 across and 10 deep, in straight columns. Seven layers fill the container to the roof; six layers leave a gap of about 35 cm, which gives up roughly 70 cartons but keeps the top layer away from the steel roof where condensation forms. Tell us which you prefer when you book.

Freight per kilo is where the loading choice turns into money:

Freight per kg = container freight ÷ (cartons × kg per carton)

The same 550 cartons carry 3.9 tonnes at 7 kg or 5.5 tonnes at 10 kg, so the heavier pack cuts freight per kilo by about 30%. Pallets carry about 2.3 times less than floor-loading, so palletise only if your warehouse cannot unload by hand. A 40ft HC doubles the payload for well under double the freight, which makes it the natural unit for an annual programme.

What happens inside the container on the way?

Two things go wrong at sea, and both are avoidable.

Container rain. A dry container crossing from tropical heat into a cool European or North Asian winter carries warm, moist air. When the steel roof cools at night, that moisture condenses and drips onto the top cartons. Wet cardboard loses its stacking strength and the bottom layers crush. The IMO/ILO/UNECE CTU Code sets out the packing practice that prevents it. FruitBuys hangs calcium chloride desiccant poles of 1–1.5 kg each on the container wall rails, 4–6 poles in a 20ft and 8–10 in a 40ft HC, and lays a protective top sheet over the load before the doors are sealed. Calcium chloride absorbs several times its own weight in water, far more than the silica gel inside the bags, which is why it does the work at container scale. The fruit inside the foil bags stays dry either way; the aim is cartons that arrive rigid and stackable.

Port heat. A container standing on a summer quay in the Gulf or southern Europe can get far hotter inside than the air around it. Sealed foil bags protect the cubes from humidity, but long exposure to heat still dulls colour and aroma. Between June and August, the steel shell of a container standing in the sun at Jebel Ali or Dammam can reach 50–60 °C. Freeze-dried passion fruit still ships in a standard dry container, with no reefer cost; on summer routes to the Gulf, FruitBuys does two things instead. We ask the carrier for under-deck stowage, which keeps the box out of direct sun for the whole voyage. And on request we line the load with a reflective thermal blanket before the doors are closed, which slows the heat that reaches the cartons while the container waits at the port.

What does the shelf life cover?

12 months from production in the original unopened foil bag with desiccant at ≤25 °C and RH ≤60%, and 18–24 months in cool storage at ≤18 °C and RH ≤50%. Cool storage is worth it for slow-moving stock: it extends usable life and cuts the risk of writing off inventory at the end of a season.

For private label, the printed best-before should match the market’s rules and your own storage. Gulf markets set expectations for shelf life through GSO 150-1; check the entry for dried fruit before you print. If you want a date longer than 12 months on your retail pack, FruitBuys can run an accelerated shelf-life study on your final pack format first.

How should bags be handled once opened?

Open a bag, use the whole bag. Passion fruit starts pulling moisture from the air the moment the foil is cut, and a half-used bag left in a humid store cakes within days. That is why bulk bags run from 1 to 5 kg: size them to the batch your line runs in one shift, so nothing sits half-open. In a mixing room above about 50–55% RH, keep each opened bag in the dosing hopper no longer than 30–45 minutes. The natural sugars and organic acids in passion fruit are what make small cubes “sweat” in humid air: the surface turns tacky, cubes cling together and the dosing heads on an automatic line start to block. Do not move opened bags into a fridge; condensation does more damage than the room air.

Use this checklist before you book

This is the check every buyer should make on arrival, including with us: open one carton from the top layer, one from the middle and one from the floor. Bags should be flat and intact, cartons dry and square. A wet top layer points to container rain; crushed bottom cartons point to weight or carton strength. Then open one bag and feel the silica gel sachet. A sachet that is heavy and saturated inside a bag that looks sealed points to a micro-leak in the heat seal, long before the cubes themselves show it. Report it with the lot number; that is exactly what the retained sample is kept for. The lot release limits behind these checks are in what moisture and water activity freeze-dried passion fruit should meet, and the shipping documents in what freeze-dried passion fruit needs to clear customs.

What if your warehouse runs hot and humid?

Many warehouses in the Middle East, South Asia and Southeast Asia run at 30–35 °C through summer, well above the 25 °C the standard plan assumes. That changes the packing, not the product. FruitBuys can pack bulk in smaller 500 g–1 kg bags so each one is used up within a single shift, and can move to a heavier multi-layer foil laminate for a lower moisture transmission rate. Pair either with a shorter printed date on retail packs, and plan stock turns so product spends as little time as possible in the hot store.

Plan your loading with us

Send your destination port, cube size, pack size and annual volume. FruitBuys returns a packing specification and a loading plan with carton count and net weight per container, so you know your freight per kilo before you book. Product details are on the freeze-dried passion fruit page, and the buyer checklist is in what to check before buying freeze-dried passion fruit in bulk.

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FAQ

How is freeze-dried passion fruit packed for export? In 1–5 kg soft-vacuumed aluminium-foil bags with a silica gel sachet, two per 58 × 28 × 34 cm carton of 7–10 kg.

How many cartons fit in a 20ft container? About 550 floor-loaded, or 3.9–5.5 tonnes. A 40ft HC takes about 1,100.

Why not nitrogen flushing? Inflated bags waste carton space and crack under stacking. Soft vacuum keeps bags flat and sealed.

What is the shelf life? 12 months at ≤25 °C and RH ≤60%; 18–24 months in cool storage at ≤18 °C and RH ≤50%.

Does it need a refrigerated container? No. It ships in a standard dry container.