Cold storage insulation panels , also known as insulation panels, are a popular line of materials used to build cold rooms. Products are manufactured according to ISO 9001-2000 quality standards. However, after a period of being put into operation, the investors realized that the construction of cold storage insulation with insulation panels encountered many inadequacies. In the following article, P69 Company will specify methods to prevent moisture contamination for cold storage insulation panels to thoroughly solve those problems.

Moisture-insulating materials in cold storage have the following requirements

– Has a large moisture resistance or has a small moisture permeability coefficient

– Not hydrated

– Must be heat stable, not harden, brittle or aging at low temperature and soften or melt at high temperature

– No strange smell, non-toxic, does not affect food and preserved products

– Does not cause corrosion and chemical effects with insulation materials during construction

– Optimal cost and easy to find.

Methods of preventing moisture contamination for cold storage insulation panels

There are 5 methods to prevent moisture contamination for cold storage insulation panels as follows:

1. Use a moisture-proof layer together with the insulation board.

Use a highly effective moisture barrier. This layer of insulation is only located on the hot side of the insulation board. If the insulation layer is placed on the cold side of the insulation board, the risk of moisture condensation in the insulation increases many times. Improve the moisture coefficient of insulation materials: Insulation materials can be mixed with binder resins or binder bitumen to increase moisture diffusion resistance.

The amount of moisture diffused from the air or the hot surface of the insulation will decrease rapidly. Meanwhile, the amount of moisture diffusing from the wall of insulation into the cold room decreases at a smaller rate. Cold storage requires that the amount of moisture diffused from the wall of insulation into the cold room is greater than or equal to the amount of moisture diffused from the high-temperature environment into the wall of the insulation. This will prevent moisture from condensing in the wall of the insulation.

2. Create positive pressure in cold storage.

Thereby, it is possible to create an air flow through the insulation wall in the opposite direction to the drop in water vapor pressure.

Artificial effect on the partial pressure of water vapor on the cold surface of the wall of insulation.

Due to the phenomenon of condensation of moisture in the wall of the insulation board of the cold storage, it is necessary to have a layer of moisture to increase the moisture resistance of the insulation board.

3. Using moisture-insulating materials in cold storage

For a long time, people have used moisture insulation with relatively high efficiency. However, the insulation layer is only arranged on the hot side. If the insulation layer is arranged on the cold side, the risk of condensation of insulation moisture increases many times.

Only the hot side of the wall should be insulated. In case the cold side is impervious to moisture (refrigeration pipelines, low pressure tanks, liquid separators), the coating of moisture insulation gradually accumulates over a long time in the insulation of pipes and equipment.

4. Increase the moisture diffusion impedance coefficient of the material

Cold storage moisture-insulating materials can be mixed with binder resins or binder bitumen to increase moisture diffusion impedance. The amount of moisture diffused in the air is increased the moisture diffusion impedance. The amount of moisture diffusing from the air or the high temperature surface of the insulation will decrease rapidly while the amount of moisture diffusing from the insulation wall into the cold storage decreases at a smaller rate. It is required that the amount of moisture diffused from the wall into the cold storage is greater than or equal to the amount of moisture diffused from the hot environment into the wall. This way, there will be no more moisture condensing in the wall.

High efficiency cold storage panel preservation method

So besides using it properly, the most important thing is to know how to store the product well. Also on this occasion, P69 will send you methods to preserve high efficiency cold storage panels.” Now let’s find out how to do it!

1. Do not expose cold storage pu panels to high temperatures

High temperatures above 40 degrees Celsius directly and continuously affect the cold storage pu panel. When the product can be stretched, changed in size and quality when we leave the material horizontally in places with too high temperature conditions. To  preserve the cold storage pu panel  , the simplest way is to put it under the roof with a temperature of 20 – 30 degrees Celsius is the most suitable.

2. Isolate the cold storage pu panel from the ground

The ground has high humidity or has a very fast growth of microorganisms, this is a favorable environment for bacteria to easily adhere to the surface of the cold storage panel. To avoid this, we should put all products on wooden shelves, pallets or wooden beams.

3. Prohibit placing large objects on the panel surface

Each cleanroom pu panel itself can only withstand a weight of 5-10kg. If the weight exceeds the allowable level, it will break the link between the steel fibers in the outer layer of the PU surface. Therefore, properly preserving the cleanroom panel is to limit placing heavy objects.

4. Isolate panel material from low pressure area

Pressure too low will easily affect the quality and chemical properties of the product against fire and effective insulation. Therefore, according to experts in the field of insulation, we should not let the panel have low pressure.

5. Avoid flammable items

Absolutely avoid contact with all equipment and materials that are inflammable and explosive such as: gas, gasoline, oil… Because when subjected to too much heat impact, the material is easily bent, wrong parameters, size and quality as well as the color of the product. Therefore, it is best to keep  the pu panel in a  safe clean room, it is necessary to isolate the area of ​​​​flammable and explosive materials.

6. Keep the cold storage pu panel clean

After production, the panels are usually stacked but must be covered with shrink film or product protection foam. This limits the product from being affected by external forces, and the other part helps the material to always be hygienic. Does not change the color and quality of the product.

Advantages of Panel panels using cold storage insulation

The advantages of cold insulation products cannot be denied  , such as:

• Good insulation ability, helps limit heat spread and high heat resistance.
• High aesthetics, easy to clean, clean. Because the product is composed of 2 galvanized steel sides, cleaning is quite easy and increases the aesthetics of cold storage.
• Bring economic efficiency. Compared with conventional sheet insulation materials on the market today, cold storage panels still bring more economic efficiency. Products are more durable and investors do not need to spend too much on disinfection equipment as well as air conditioning.
• Products are manufactured in a closed line and are designed with pre-assembled joints, so the construction is quite simple, just need to assemble these joints together.

However, the assembly of panels together will create joints and gaps that cause heat in the room to be lost to the outside. Here are the inadequacies that cold storages with insulation panels often encounter.

Disadvantages of cold storage insulation panels

Panels will be glued together, this will create small gaps. Although construction units have used silicon to extract all joints and openings, this solution is not 100% effective, and the life of silicon is not high. Therefore, after a period of operation, the loss of cold air to the environment as well as the penetration of heat inside is inevitable.

In addition, although the core layer of the Panel is made of PU material – With excellent heat and sound insulation, the actual density of PU foam to produce the Panel is quite low.

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