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is a passive packaging? |
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To
maintain a certain temperature of goods during an air
freight transport, two kind of
ways can be used, being an active packaging or a
passive packaging. An active packaging has an
electrical or mechanical cooling unit which generates
chilled or conditioned air flow to maintain the
temperature of the goods. A passive packaging has no
electrical or mechanical colling unit so the
insulation quality of the packaging will be in charge
of maintaining the temperature of the goods. In the
air freight or air cargo industry the envirotainer is
a well known active packaging which has a cooling unit
generating a certain air flow. Thermal blankets and
thermal covers are used as a passive packaging to
maintain the temperature of the goods and protect them
against external temperatures of extreme temperature
fluctuations. The insulation quality of the used
material will determine the temperature result of the
goods.
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Example
temperatures in Air freight: (Brussels -
Dubai - Singapore) with passive packaging
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The
graphic above shows a possible temperature flow (blue
line) of outside temperatures that can occur during an
air freight transport. The brown line represents the
ideal temperature for your goods. The green zone
represents the maximum and minimum limits of the
temperature. The temperature of your goods has to be
within this green zone to maintain the quality of your
goods. The goal of a passive packaging is to insulate
your goods in such a way so the temperature stays
within the green zone during the total air freight
transport time (black line).
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| Passive
packaging and Temax insulation |
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Temax
insulation is a new revolutionary insulation
material which is being used in several applications like
transport insulation, building insulation, packaging
insulations, etc which has proven its insulation quality,
even in extreme conditions. The Temax insulation is
flexible and foldable, easy to use, waterresistant and
100% recycleble which makes it also very atractive for
one-way purposes. The Temax insulation has a unique
build-up to offer resistance against the three heat and
cold transfer items being: UV-radiation, conduction and
convection. |
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1.
Temax4000 versus UV radiation
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To
offer resistance against the most important element of
the warmth transfer, UV radiation, a special
reflective film was developed, which has a reflecting
capacity of 98%. On this special reflection film the
reflection takes place on both sides of the film.
Effective reflection can only happen when the
reflective film is not in direct contact with an outer
material or the product that is being packed. To
protect against the possible reflection blockades by
direct contact,
the Temax 4000 insulation has bubble foils on
the inside and outside that keep an ideal distance
between the packed products (or outer material) and
the reflection film. This results in a maximum
reflection capacity. |
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2.
Temax4000 versus Conduction
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Conduction
is heat transfer through the material which depends on the
raw material composition of the material in itself.
Therefore for reducing the conduction a material is chosen
with a lambda value as low as possible for decreasing the
temperature flow in each material layer. The Temax 4000 is
built of 14 layers; these 14 layers are separately put on
each other and not fixed to each other. Air between these
layers becomes an insulator and also a separator of heat
transfer between the several layers. These
layers are put on a specific order and direction on each
other for reducing enormous the surface contact between the
upper and the lower layers, whereby heat transfer between
these layers are reduced.
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3.
Temax4000 versus convection
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Convection
is heat transfer by air current. Warmth rises and cold falls
whereby heat transfer arises on the lower and upper layers.
This is reduced by air which is captured in the individual
bubbles of the bubble film. These individual bubble
dimensions are precisely produced so that each bubble has a
optimal internal air flow and circulation. All air bubbles
on the layers or films are produced with a certain gap for
avoiding heat transfer between the several air bubbles.
Hereby the convection warmth of one bubble can’t influence
another neighbor bubble. Heat or cold created by convection
can easily escape through the several separated layers of
bubble film whereby the individual bubbles can obtain there
own temperature. This
technology also helps decreasing eventual condense which is
a common problem with other insulations products.
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Technical
specifications TEMAX: see page Temax
insulation
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