Header PE foam profiles


Extruded PE foam profiles

Polyethylene foam is a closed-cell material with excellent properties, e.g. low density, superior age
and weather resistance, very good thermal and acoustic insulation rates as well as high resilience to
acids, bases and other chemicals.


>>  closed cell structure
>>  excellent insulation properties
>>  thermal conductibility coefficient < 0,036 W/mK
>>  low density
>>  excellent age resistance
>>  high chemical resistance
>>  very low water absorption and water vapor permeability
>>  environmentally neutral, no labeling obligation, no hazardous material


We manufacture your custom-made product according to your wishes and demands.

Production specials:
>>  additional fire protection
>>  lamination (self-adhesive tape & aluminum foil)
>>  laser imprint
>>  post processing & finishing

*When "extruded" the raw material is being molded under pressure and endorsed with foaming agents into an extrusions die. After leaving the die the polyethylene foam expands into the desired shape.

Contact info

ratioSystems® Germany Ltd.
Konrad-Zuse-Allee 13
21337 Lüneburg

Tel.: + 49 (0) 41 31 / 26 664 20
Fax: + 49 (0) 41 31 / 26 664 10
E-Mail: info@windowsafe.de



You need a profile that doesn't need to meet special technical demands? Please ask for one of our standard solutions.

Please contact us for more information: info@windowsafe.de

PE foam profiles standard types

Cellular polyethylene is a highly versatile material suitable for a wide range of applications:

PE foam profiles 1

Thermal insulation
Profiles made of PE foam provide very low U-values (low heat conductivity in W/mK) and thus high thermal insulation rates. They are therefore of great import when it comes to energetically sustainable building.

Thanks to their closed-cell structure and a smooth surface profiles made of extruded PE foam are water tight and especially suited for sealing tasks.

Standard PE foam profiles, e.g. U- or L-shaped, are often used as edge protection in the glass, metal working or furniture industry.

Because of its low density and its mechanical properties PE foam is a very suitable filling material. In this area additional properties like its acoustic insulation rate are of particular interest too.

PE foam profiles 2

Energy efficient construction and reconstruction with windowSafe® PE foam profiles

When it comes to the construction as well as the reconstruction of buildings saving energy has become a dominant topic over the last few years.

This is due to ecological as well as economical reasons and thus nearly all branches of the building sector are included in energy saving efforts.

Due to their excellent insulating properties polyethylene foam profiles have become more interesting in recent years. Today they are a vital part in of window and facade systems.

PE foam profiles are able to lower the thermal transmission coefficient of a window or a facade significantly. Energy costs can be saved and pollutant emissions can be lowered.

PE foam profiles 3


Cellular polyethylene - the windowSafe® standard material



grey, blue, white, anthracite


FCKW- and HFCKW-free, 100% recyclable


25 to 35 kg/m³

Thermal conductibility:

< 0,036 W/mK

Water absorption:

< 1%

Compression set:

< 30%

Water resistance:


Temperature resistance:          

-40°C to +90°C

Cell structure:

regular and closed

Further information:

excellent insulation properties
very low water vapor permeability
excellent age and weather resistance

Profiles can be endorsed with divergent or additional properties (colors, density, flame resistance and many more) by using foam supplements during the extrusion process. Please send us your request: >> Send request

Read more on "PE and PE foam"


Polyethylene – the material

Like polypropylene (PP) and ethylene vinyl acetate (EVA) polyethylene is a polyolefin. Among all synthetic materials polyolefins are the ones most commonly used.

The history of polyethylene started in 1933 in the ICI laboratories in Great Britain. Little quantities of a certain white powder were found in an autoclave which was later identified as polyethylene. A few years later the first manufacturing facility was put into operation. The process used high pressure for converting ethylene into polyethylene. Because of that the material was than named “high pressure polyethylene”.

Today polyethylene is classified and named according to its density. High pressure polyethylene is therefore now called LDPE (low-density polyethylene). The designation change was required mainly because in 1953 chemists in Germany (Max-Planck-Institute, Essen-Mühlheim) as well as in the US (Phillips Petroleum Comp.) were able to polymerize ethylene under low pressure with the help of certain catalysts. The resulting “low pressure polyethylene” exhibits a higher density and is thus called HDPE (high-density polyethylene).

Today various methods of production result in different types of polyethylene with varying properties:


>> HDPE („high-density polyethylene“)
… is produced under low pressure and with the help of catalysts. HDPE has a low degree of branching and thus low intermolecular forces and tensile strength. HDPE is used in packaging products such as milk jugs, detergent bottles or garbage containers. According to Wikipedia one third of all toys are manufactured from HDPE.

>> LDPE („low-density polyethylene“)
… is produced under high pressure and temperatures which results in strongly branched molecules and a low density. LDPE is used for example for plastic bags and film wrap but also for rigid containers.

 >> LLDPE (“linear-low-density polyethylene“)
… is a polymer with a significant number of short branches and very low density. LLDPE has higher tensile strength as well as higher impact and puncture resistance than LDPE. Due to its toughness, flexibility and relative transparency LLDPE is predominantly used in film applications such as saran or bubble wrap.

>> MDPE („medium-density polyethylene“)
… is either produced as a mixture of LDPE and HDPE or via copolymerization. It has good shock and drop resistance properties and is less notch-sensitive than HDPE.

>> PEX or XLPE
… PE X is a medium to high density polyethylene containing cross-link bonds introduced into the polymer structure which creates thermosetting properties. Both temperature and chemical resistance are enhanced.


There is a wide range of processing methods when it comes to polyethylene. The most common ones are:

>>  injection molding

>>  extrusion

>>  blow molding


PE foam or cellular polyethylene

PE foam is a closed-cell material with a very low density and excellent mechanical properties. The different types are distinguished according to their manufacturing. There is cross-linked and non cross-linked foam (PEX and PEE). Cross-linked materials contain bonds between the polymer molecules and thus exhibit a three-dimensional network. The non cross-linked types do not have any links between the molecular strings.


>> PE foam, chemically cross-linked
Here the hydrocarbon molecules are being bonded by a chemical process resulting in macromolecules. The thermal and mechanical stability is effectively improved.

>> PE foam, physically cross-linked
Here the bonding process is achieved in a highly energetic field of electron beams. The manufacturing process is only applicable to very thin foams (meter gods).

>> PE foam, non cross-linked
The molecular strings are not linked to each other in any way. During PE foam extrusion for example the molten polyethylene is expanded with the help of a propellant (e.g. pentane or CO2) and high pressure. The missing bonds result in lower thermal and mechanical stability.


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