When designing custom gaskets, silicone foam rubber and polyurethane are popular choices among customers. Some customers think that they’re one and identical. While they are similar in certain aspects, the two materials are very different. If you’re a design engineer or technical buyer, you must know the distinctions between the two materials before you buy or use them.
Understanding the basics
The following points outline the standard features of the two materials.
- Both polyurethane and silicon offer resistance to fire as well as UV radiations.
- They are foam rubbers, and they provide cushioning and insulation.
- Depending on the intended use, they can be constructed with either closed or open cell design.
Differentialities in Foam Sponge Rubber and Foam Sponge Rubber
The following tips help you understand the distinctions between these two materials.
Polyurethane Foam Rubber Gaskets
Polyurethane gaskets are typically designed as free-cell polyurethane. They have interconnected pockets that permit water, air, and other chemicals to flow even if the material isn’t compressed. Because of this, the gaskets are highly cushioned. Gaskets made of polyurethane are suitable for medical, research packaging, electronic, and other industries.
Silicone Foam Gaskets
Silicone foam gaskets are available in various firmness levels based on the compression requirements. They can be soft, medium, or even stiff. Silicone is renowned for its excellent flame resistance, low set of compression, and temperature stability. Silicone foam rubber offers the benefits of chemical inertness and is non-toxic. Therefore, they are used in applications focusing on sterilization and sanitation. Because of this, they are usually made as closed cells of silicone foam. The cells there are filled with gases that prevent the absorption or passage of water, air, and other chemicals under low pressures.
As you will see, these two materials share a few similarities but also have distinct differences in their characteristics and use. The choice of silicone or polyurethane gaskets varies based on the specific requirements for the application. Therefore, you must know the requirements before utilizing any material. It is also possible to seek advice from an expert in seal manufacturing to determine the ideal solution.
PU Gasketing Machine for enclosure sealing strip
PU Gasketing Machine is utilized in enclosures/cabinets, lighting, and other sealing areas. Sensors and actuators based on advanced technology ensure the safety of the dispensing machine. Material, information, and the process parameters of the machine could be recorded to ensure that users can dial one by their requirements while using the machine. The PU foam gasket is provided in any size that ranges from 10x5mm to 36x18mm. Golconda Energy can dispense gasket on job sizes up to 2000x1000mm in any shape. Golconda Energy also offers gaskets in a separate package for customers to apply the same on jobs as per their specifications.
