Lime Desiccant [RAYM]

Characteristics& Performance

Lime desiccant has a high humidity absorption rate compared to physical absorbing desiccant, especially at low humidity. It is economical desiccant and has good absorption ability for long time stock.
The main composition of lime desiccant is calcium oxide (CaO), which absorbs moisture by a chemical reaction. The chemical equation is usually expressed as:
Its moisture absorption has nothing to do with the external humidity condition, the moisture absorption capacity is about 30% of its own weight, after absorbing the moisture, it will change into powder, so it is very easy to judge whether it has absorbed moisture or not. Meanwhile, the moisture that has been absorbed will release vapor.

Comparing with the physical absorptive desiccant, especially at the state of low humidity, it is a desiccant that has high moisture-absorption rate, excellent long time moisture-absorption property, and with lower cost.

Moisture-absorption property(Charts omitted)

Moisture-absorption property

Composition(test value)


※The above-mentioned are not guarantee value but test value.

Packaging material

The packaging material conforms to the strength standard of Japanese Desiccant Association (NSKK) which is imported from Japan. It is made of three layers—-waterproof paper layer, strengthened fiber layer (claf) and micropore polyethylene layer. To achieve the best moisture-permeability of the desiccant, we use the special processing technology, only perforate in PE layer. 
①Using the new strengthened polyolefin fiber which is 23g/m2. Comparing with the goods before, the physical parameters, such as rupture strengthen, are promoted a lot.
②Do not contain harmful substance( ROHS 6 substance etc.).
③Using printing ink which is decomposed from natural material and not contains toluene, it conforms to the food and additives standards. Refer to Notice 370 of Japanese Ministry of Health.
④After waterproof processing, it has a good waterproof property, and the danger of heat-releasing is reduced.
⑤Using special ventilation processing technology of our company, we only perforate in PE layer. There are total 80,000 holes per square meters so that the desiccants can have the best moisture-permeability.

Strength standard of NSKK

Testing Item Standard value
Tensile strength(JIS-P-8113) MD(KN/m) 2.62
Stretching(%) 2.5
CD(KN/m) 1.96
Stretching(%) 2.5
Tear strength(JIS-P-8112) KPa 250
Sealing strength(JIS-P-8112) N/15mm 6


Nori, rice crackers, dehydrated vegetables, shiitake mushroom, candy, etc.


It is not the food, but the lime is not only used as the dietary supplement, but also used as the decontaminating agent of impurities and coagulant.
The packaging material contains no harmful materials and with good strength, so please rest assured to use it.
Notice for use:
①After absorbing moisture, the lime desiccant will expansion, and if your container has no expanding room, it would cause the bag broken. Besides, while using, please avoid bearing, flexing and kneading etc.
②If it is used for the food with high humidity, we suggest you to do the actual packaging test firstly.
③If the content in the desiccant is still effective, don’t let it contact water, because if the lime contacts the water directly it will generate heat immediately.