Frequently Asked Questions

1. How does Dry Bag help to solve moisture problems?

Dry Bag contain calcium chloride that aggressively capture and absorb moisture from the air. They dry the air. When the air is dry, there are no moisture problems.


2. What are the most common problems caused by moisture?

Moisture in containers causes problems such as mold, fungus, mildew, rust decay, lumping, caking, agglomeration and decomposition. Moisture can also cause electronics to malfunction.


3. Can Dry Bag solve all moisture problems?

Most, but not all. Some cargoes may be so wet that any reasonable number of Dry Bag get overwhelmed. But Dry Bag can reliably protect even very difficult cargoes that may contain tons of moisture, such as coffee beans, wood products or paper.


4. What is a desiccant and what does it do ?

A desiccant is a hydrating agent which attracts moisture from the atmosphere. It adsorbs and holds Particles of water to itself.


5. What is Relative Humidity (RH)?

Relative humidity measures the amount of moisture in the air. It is expressed in a percentage of how much moisture the air could possibly hold. The wetter or damper the air is, the higher the relative humidity. The drier the air feels, the lower the relative humidity. Thus, 100% humidity is actually rain.


6. I load my container under dry conditions and it is very tightly sealed. How come I still experience moisture problems?

Your cargo or the packaging, including container floors, pallets and crates, contain moisture that can evaporate into the air during transport. Wet packaging material is the most common cause of unexpected moisture problems.


7. I have shipped the same cargo for years with Dry Bag without any trouble, but now I suddenly have damage. Have you changed the Dry Bag?

Check your container and your packaging material. Did you just start to store your pallets outdoors? Does your forklift drive into the container with snow on the wheels? Did you just change supplier of crates? You cannot tell by looking whether wood or cartons are dry. The moisture properties of wood and cartons have an exponential character. It makes a huge difference if your pallets have a moisture content of 20% instead of say 15%.


8. I ship consumer goods in tubes/cans/jars etc that contain no moisture, yet I still have problems.

Consumer goods are often shipped with a lot of cardboard packaging. Even if the boxes seem dry they could literally hold hundreds of liters of water.


9. Each container of my cargo of peanuts/coffee/cocoa/nuts contains tons of moisture. What difference does it make that Dry Bag absorb a few litres during a voyage?

Moisture processes have an exponential character. That means that even a small change in circumstances can have a huge effect on the outcome. Dry Bag create circumstances that allow almost all of the moisture to remain in the cargo even while the level of humidity in the air is lowered by a crucial amount, sufficient to prevent damage. It is a question of ”leverage”. This is by absorbing moisture from the air and reducing the relative humidity.


10. Does it make a lot of difference that my cocoa beans have a moisture content of 8% instead of 7%?

Yes, such a difference could be all the difference between no damage and disaster. The moisture behaviour of most agricultural products have a strong exponential character.


11. My cargo of peanuts had suffered damage in the centre even though the outside of the cargo looked fine and there was were no signs of condensation?

Much, if not most, damage to cargoes is caused by prolonged periods of elevated humidity without any condensation (Container rain, Container sweat, Super Saturation Event). It is common that cargoes loaded at a cool temperature and then moved into warm conditions suffer damage in the centre of the cargo. This is a result of a difference in temperature between the outside and the centre of the cargo. Warm air from the outside of the cargo becomes humid as it moves into the cooler centre. Dry Bag protect against this effect even though they are mounted on the container walls.


12. I had damage to my cargo even though I used lots of silica gel and there was no condensation. Would it help to switch to Dry Bag ?

Calcium chloride absorbs moisture even when the humidity is not very high. This protects the cargo against damage caused by prolonged periods of elevated humidity. Some kinds of steel start to corrode at 70% relative humidity, moulds can grow at 80% relative humidity and at near 90% relative humidity lots of things can go wrong. Yet, Dry Bag are also at their most efficient protecting against condensation. Most other products, such as silica gels, are only effective in very humid conditions and for a short time period before they become over-saturated.


13. What is so great about Dry Bag anyway?

Well, they will not fall off the wall, get punctured during loading and unloading, leave a wet puddle on the cargo or run out after half the voyage. They are installed in seconds without ladders and take up no cargo space. The capacity of each Dry Bag is big, so fewer are required. The cost of an installation is very competitive, even against much inferior alternatives.


14. How many Dry Bag do I need?

The number of Dry Bag required to protect the cargo depends on the cargo, the temperature conditions during the voyage, the length of the voyage – and just how safe you want to be. For some really dry cargoes 2-3 Dry Bag are enough. For most ”normal” goods 4-6 Dry Bag is Sufficient. Some cargoes with very difficult moisture properties on long voyages may require up to 16 Dry Bag.


15. Do I need to line my container with Kraft paper?

Many containers are lined with Kraft paper primarily for reasons of hygiene or to simply isolate the cargo from direct contact with the container walls. The liner will act as a kind of sponge, catching and absorbing any droplets of water and then re-evaporating the moisture into the air. If a liner is used without Dry Bag it could contribute to a kind of pumping effect, drawing moisture out of the cargo and then releasing back into the air. When used together with Dry Bag the liner will act as a buffer in extreme conditions, this will prevent any container rain from reaching the cargo. Much the same can be said for so called dew cloths.


16. My container is absolutely filled with cargo. Will the Dry Bag still work?

Moisture diffuses very effectively, even through a seemingly compact cargo. Experience shows that Dry Bag will make a difference even to mould growth inside cartons in the cargo. It is, however, necessary that some free space is left in front of the grille of each Dry Bag. If some Dry Bag have absorbed less moisture than others inside a container, there may be a problem with air access to those Dry Bag.


17. I have problems with mould growth inside my shrink-wrapped pallets. Will Dry Bag help?

Yes, so long that there is some access of air through the top and bottom of the pallets. If this is not possible, a spiked roller may be used to tear holes in the shrink wrap.


18. My shipments of metals, machinery etc arrive corroded, stained or miscoloured despite heavy packaging. Will Dry Bag help?

You can forget about your tectyl, coatings, oil-paper and plastic wraps that are expensive both to apply and remove. Your container can probably be equipped with a sufficient number of Dry Bag to protect against any damage at less cost than your present packaging.


19. I got some brine on my hands while removing used Dry Bag . Is it dangerous?

No it is not. Calcium chloride is non-toxic and environmentally safe. The brine is somewhat similar to very salty seawater, and may cause irritation and rashes if left to dry on the skin. We recommend that you wear gloves and goggles when handling used Dry Bag. But should you get splashed by brine just wash off immediately with plenty of fresh water.


20. Does Dry Bag comes ready to use?

Yes. The Dry Bag does not need to be 'generated' before use. It is always sold in a dry condition, ready for use.


21. How long does Dry Bag be stored?

Almost infinitely long time. Practical experience has shown that it can often far exceed this.


22. Is Dry Bag dangerous?

Dry Bag is non-toxic and non-flammable, it is very inert with a very high melting point.and thus can safely be sent by any means of transport.


23. Is moisture damage always instantly visible when handling the cargo?

Dry Bag is non-toxic and non-flammable, it is very inert with a very high melting point.and thus can safely be sent by any means of transport.


24. Is moisture damage always instantly visible when handling the cargo?

Unfortunately not. Though common forms of moisture problems such as corrosion, mold or fungus are visible on the cartons, surfaces etc there are some kinds of damage that is not visible. Mostly these damages are internal and visible only when the customer opens the shipments. In the case of devices, they often cease to function the way they should.


25. My cargoes are outdoor furniture with brass parts on it. When the goods arrive at the destination the wooden part is in perfect condition but the brass part has slight stains on it. What should I do to avoid this? Should I use more units of Dry Bag?

In some cases, it can happen. I can suggest adding one or two more units and wrapping it properly with only single face carton.


26. I notice that two kinds of containers available in the market right now, which are steel and aluminium types. If I shipped the same commodity inside of steel and aluminium containers should I used same numbers of Dry Bag or not?

There is not much difference between those containers, so you don’t have to adjust the number of units.


27. Can I recycle my used Dry Bag

The Dry Bag are made by PP/PE plastic, and it is readily recyclable. Each part of the Dry Bag is appropriately marked for optimum recycling. Any remaining calcium chloride is easily removed by soaking the Dry Bag in fresh water.



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