F.A.Q.
What is Rotomolding?

Rotational molding is a simple low-pressure process in which the mold is charged with plastic powder, heated until the powder spreads on its inner surface, cooled until the plastic solidifies and finally opened to remove the finished product. For more information on the process please follow the link.

 

What materials are used in rotomolding?

The primary material used in rotomolding is polyethylene (PE). There is a wide range of PE . Low Density PE (LDPE), which is soft and flexible, High Density PE (HDPE), which is hard and brittle, Linear Low Density PE (LLDPE), which combines the strength of HDPE with the flexibility of LDPE, cross-linked polyethylene and metallocene polyethylene. However, a variety of other materials can be rotomolded, including PVC, nylon, polypropylene, plastisols etc.

 

What are the advantages of rotomolding over other processes?

Because Rotomolding is a low-pressure process the tooling cost is much lower, than the cost of tools used in other processes. This makes rotomolding a more cost effective method, especially for smaller quantities.

Powder in the mold melds gradually, under no pressure, giving a stress free product, carrying no internal stresses which is the main cause of cracking.

The process has virtually no size limitations. Small balls to huge containers can be produced by rotomolding.

Complex shapes with molded in handles, graphics, threads, and inserts can all be part of the design, saving you time and money by eliminating secondary operations.

Different colors or materials can be processed one after the other without the need of cleaning the mold or the machine.

Multi layer products can easily be produced. This gives a very big flexibility to the product to satisfy different requirements of the inner layer, the outer layer and possibly any intermediate layers like insulating foam, or less expensive materials.

 

Is Rotomolding a fast or a slow process?

Rotomolding is a slow process. The cycle time varies from 30 minutes to 2 hours depending on the complexity of the mould, the wall thickness of the product and the material used.

 

What can be produced with Rotomolding?

Toys and Playground equipment

Tanks and Containers

Sea Items like Boats, Kayaks, Floats, Chairs etc.

Ducts

Medical equipment

Panels

Pallets

Insulated Products

Housings and furniture

Car accessories

 

With which material the Tanks are made off?

The Tanks are made of Linear Low Density Polyethylene (LLDPE). This material combines the strength of HDPE with the flexibility of LDPE.

 

Why Water Tanks are made of more than one layers?

Light external color reflects sun rays, thus keeps the water cool. Another essential requirement, is to prevent the formation of fungi. Fungi is formed when sunlight enters the tank. A dark layer (Black is ideal) does not allow sunlight to enter the tank, thus prevents the formation of fungi.

 

Is it possible to store chemicals in the tanks?

There is a huge variety of chemicals which can be stored in Polyethylene tanks. For specific application check the list of chemicals.

 

Is Polyethylene affected by environmental conditions?

No. The material used is UV stabilized and it has an extended life period under the sun.

 

At which temperature range the products maintain their properties?

From -20°C to 70°C

Vita Construction (Cyprus) completed its first construction project in 2009, the residential complex SmartHome® at Tseri, Nicosia (comprises 7 detached houses) using “smart” manufacturing methods and ensuring

significant energy efficiency. The second SmartHome® project, Vita Court 2 a residential block comprises 6 luxury flats at Palouriotissa, Nicosia) continue reading...