At standard atmospheric pressure, at a certain temperature, the water vapor in the air reaches
At 100%, the amount of water vapor contained in the unit volume of air is constant.
It refers to the ratio of the amount of water vapor in the air to the amount of water vapor contained in the saturated state (100%).
The container is a relatively closed environment, through the gap or venting holes and the outside air
Volume exchange is limited in a short time.
During the daytime, the temperature inside the box is very high.
(38 °C), the humidity is at a relatively low level (65%); at night,
Large drop (30 ° C), but the water content in the whole air has not changed much (also
Is 27g/m3), the relative humidity rises sharply
Containers with frequent fog and rain have the following characteristics:
A. Most of the sea areas passing by the loading place or cargo ship are hot and humid, but the destination is
The temperature is relatively low, indeed.
B. A water-containing material such as a wooden box is used as a transport package.
There are several types of water in the container:
The goods are self-contained
2, the box is condensed
3, the sea water is dip
4, the fresh water is immersed,
What measures are needed for container moisture protection?
Packing goods with barrier packaging materials
Packing goods with barrier materials such as aluminum foil bags, PE bags, etc., can avoid packaging
Water vapor is emitted into the container to increase the humidity inside the container, and even if it is subject to assembly
The influence of the box mist and rain can also effectively prevent the goods from directly contacting the liquid water and causing damage.
Avoid the use of aqueous packaging materials as much as possible
Paper and wooden pallets are all aqueous packaging materials. When the moisture content of these materials is too high, no
Suspected to increase the possibility of container fog and rain, in addition, some buffering and fixing materials are also
Contains a certain amount of water, when the temperature inside the container is too high, the moisture of these materials will be large
The amount of volatilization causes the humidity inside the case to rise sharply.
Use of package desiccant