Polyolefin Foams

There is a strong and growing demand for extruded polypropylene (PP) foam in a market which has been traditionally served by materials such as polyurethane, polystyrene and polyethylene. PP brings additional benefits to this market area, such as:

• high heat resistance,
• excellent chemical resistance,
• insulation properties.

Polypropylene-based foams include:

• thermoformed, foamed trays for packaging meat, sausages, cheese and other foods,
• high speed, direct extrusion for extrusion coating,
• insulation materials in building construction,
• material for car interiors and protecting goods during transport.

What makes our polypropylene different?

Due to its limited low melt strength and low extensibility, traditional PP is unable to become foam at densities lower than 500 kg/m³. This type of PP does not allow for controlling cell growth nor preventing the cell wall from breaking during the foaming process.

Our High Melt Strength (HMS) line of materials overcome these limitations by allowing polyolefin foams to be created at densities of 30 kg /m³. Our foams are produced with very uniform and fine cell structures.  

In addition, Borealis' PP include high temperature resistance, good chemical resistance and extended mechanical properties.

A new range of polypropylene materials for PP-based foams

Borealis has developed a new range of Daploy™ products that meet the requirements of the soft foam markets. Borealis' Daploy can also be blended with a wide range of standard extrusion polyolefins and offer:

• weight reduction and material savings,
• high service temperature,
• high stiffness or softness depending on the HMS grade used,
• low temperature impact resistance,
• excellent thermal and acoustic insulation,
• excellent recycleability and environmental friendliness.