Frozen Durian
Normally, frozen durian is traded in whole fruit form. Durian
consumers have no idea of the inside yield or its freshness.
Today therefore, durian sellers peel the thorny skin and take
the flesh out in order to have it frozen. Durian can be frozen
by either contact freezing or individual quick freezing (IQF)
as whole fruit or seed-free aril. Freezing whole durian fruit
is less preferable because of the large freezing area and high
energy input required. Durian frozen by IQF can be kept for
a year. The process of IQF frozen durian is as follows :
Figure 1 : Individual quick freezing (IQF) process.
Most frozen durians are targeted for export to western countries,
which account for about 10% of total durian export. Frozen durian
export more than doubled over the period of 1992-1996. From
2,390 tons (6.9 million durians) in 1992, export has jumped
to 5,635 tons (11.3 million durians) in 1996 with the USA, Australia
and Canada as new emerging markets. There are 4 kinds of packaging
for frozen durian.
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Polyethylene (PS) foam package.
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Transparent polypropylene (PP) package.
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Inside wrapping with elastic film and polyethylene film.
Frozen Durian 
