Storage Conditions of Natural Rubber Products

Manufacturer: We have just received a complaint from one of our major customers regarding the shelf-life of our natural rubber products in their warehouse. We have investigated our formulation and manufacturing process and found that both are already at their optimum levels. Careful design and curatives and antioxidant system had been adhered to. We would appreciate if you could offer further assistance.

John Woon (Senior Latex Consultant): Maybe you should help your customer by advising them on the conditions of storage for your products.

Rubber products can normally be stored for many years without any loss of their inherent properties provided the following precautions are taken:

1) Do not deform the products to prevent stressing the rubber.
2) Do not expose the products to elevated temperatures for long period. If possible do not exceed 35C.
3) Do not expose the products to light i.e. direct sunlight and artificial light. If possible store the products in the dark.
4)  The products should be properly wrapped and covered also to minimize exposure to air (oxygen) and ozone. Ozone is particularly harmful. The warehouse should not have any electrical equipment that can generate ozone such as high-voltage equipment, electric motors and mercury vapour lamps.
5) Excessive humidity and moist condition especially due to condensation should be avoided.
6) Do not allow the products to come into contact with brass, copper, iron, solvents, oil, greases, etc.
7) Do not unduly store the products for too long by ensuring the stocks are used in rotation.