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Technical specifications & Properties


The economical construction of ALPET®

With the sandwich construction method, we process the insulating structural foam core based on PET and encase it in glass-fibre reinforced, semi-crystalline thermoplastic.

Empty spaces are replaced by a foam with microscopically small air chambers.

In a continuous manufacturing process, the sheathing, including dovetail connectors or grooves/flags are produced extremely economically around the foam core.

Resistant to chemicals and cleaning agents
  • Prepas 130-720 Prelitin 750-200
  • Singoli Citrus Power Cleaner
  • KABE Paints Universal Thinner 5119
  • KABE Colours Turpentine Substitute
  • White GOSMO HD-100.411/412
  • IBZ S-150 Isopropyl alcohol (substrate cleaner)
  • Bider Hauser Microdosing Spray Oil
  • Wieds Demysol 2012
  • Ateco Tobler (diluted sulphuric acid)
  • Ateco Tobler descaling aluminium
  • Ateco Tobler pickling bath (diluted nitric acid and aluminium)
  • Precap 950-006
  • Esco 2-component aluminium adhesive
Effects in case of shear load

The following figures show the investigation of stresses in different ALPET® cross-sections. They are below the values specified in the standard. Figure 20 shows the occurring stress according to Mises under tension.

FEM calculations cross-section 1

FEM calculations cross-section 2

FEM calculations cross-section 3

FEM calculations cross-section 4

Thermal behaviour checked

The thermal effects were checked with the FEM programme. The occurring stresses are below the
permissible value, the requirement according to the standard is fulfilled by far.

Shear strength ALPET® (EN 14024)
Transverse tensile strength ALPET® (EN 14024)

Worth knowing


Suitable for the new Building Energy Act GEG (as of 1 November 2020)
Suitable for Minergie (Swiss label for buildings with minimal heating-energy consumption)
Suitable for passive house (German label for buildings with no heating-energy requirement)

Sound measurement

Our insulation bar in comparison with conventional insulation bar and profile systems:

ALPET® Rw (C; C tr) = 46 (-2; -6) dB
Reference depth 80 mm Rw (C; C tr) = 46 (-2; -6) dB (Noryl-Steg)
Reference depth 70 mm Rw (C; C tr) = 47 (-2; -6) dB (Polyamid-Steg)
Fire behaviour

DIN EN 13505-1, Class E

Ageing behaviour tested

The ageing behaviour was extrapolated according to advanced scientific methods.
(stepped isostress tests)


Innovation project supported by:


Basic research and development by:


Verifications and suitability tests by

Fire behaviour (Nr. 20-001273-PR01)
Mechanical performance (Nr. 20-001273-PR04)
Thermal insulation (Nr. 20-001273-PR05)