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OLU-Preg® PDF Print E-mail

Multilayer Non-Crimp Fabrics Reinforced Thermoplastic Composite

with biaxially unidirectional reinforcement

Organic sheets for FRP components in mass production

SKM OLU-Preg Tech Icons
SKM High-Distance-Material

Thermopressed part with
four layers OLU-Preg®



View of both orthogonal reinforcement layers with plastic matrix between them

OLU-Preg 100-fach vergroessert

Sectional view 100 x magnification


Complete penetration of the reinforcement structure with matrix material

OLU-Preg 1.000-fach vergroessert

Sectional view 1,000 x magnification


Characteristics OLU-Preg®

  1. Matrix Material PP, PA
  2. Textile reinforcements, e.g. GF, CF
  3. Two UD reinforcement layers free of ondulation, separated by matrix
  4. Short Matrix flow paths during consolidation
  5. Integration of impact element, e.g. sensors
  6. Generally fabricable in all material combinations
  7. Available in matrix colours natural and black, other RAL colours possible
  8. Fabrication of thin and lightweight laminates starting at 0.4 mm sheet thickness


Advantages OLU-Preg®

  1. Fibre volume up to 50%
  2. Free of air inclusions
  3. Easy thermal forming, very good drapability, excellent deformation behavior
  4. High impact strength and collision-energy absorbtion, locally differentiated reinforcement adjustment
  5. Recyclable


OLU-Preg® – Typical Product Characteristics

OLU-Preg  Spannungs-Dehnungsdiagramm - Tensile Stress Elongation

Tensile stress / elongation diagramm
PP/GF, roving glass volume 40%

OLU-Preg  Kraft-Verformungs-Diagramm – Collision energy absorption

Collision-energy absorption

  1. Utilisation of fibre substance at tension: approx. 150%
  2. Tensile stress (in one tension member): 600 MPa
  3. Tensile modulus: 17,000 MPa
  4. Elongation: 2.5 %
  5. Notched impact strength(Form C, -20°C): 342 kJ/m2
  6. Bending stress: 250 MPa
  7. Flexural modulus: bis 20,000 MPa
  8. Lehr's damping measure: 0.01
  9. Falling Dart (penetration energy): 98.3 J


Result of collision-energy absorption of material used so far in comparison to OLU-Preg®

Stosstest Fremdprodukt

2 roving glass layers K2/1
GF/PP - 0.8 mm, φ = 38%

OLU-Preg  Kraft-Verformungs-Diagramm – Collision energy absorption

2 layers OLU-Preg® 0°/ 90°
GF/PP - 0.8 mm, φ = 40%


Composite of the Future: OLU-Preg®

SKM OLU-Preg Anwendungsbeispiele Drahtgitter – Application Examples Wireframe


Material Data Sheet

OLU-Preg® GB 400-40-1.10 Roving Glass - PP Thermoplastics - Composite

Characteristics Units 0° Direction 90° Direction


Reinforcement Fibres Roving glass
Area Weight g/m² 400
Yarn tex 300 300
Weight Ratio % 50 50
Polymer PP; textile structure
Composite Fibre Content vol% 40
Density g/cm³ 1,8
Thickness mm 0,4
Mass per unit area g/m² 625

Mechanical / Thermal

Tensile Strength MPa 330 330
Modulus GPa 17,5 17,5
Elongation % 2,5 2,5
(span-to-depth ratio 40:15. thickness 2mm)
Ultimate stress MPa 300 300
Modulus GPa 17 17
Elongation % 1,8 1,8
Impact strength notched (Form C; -20°C) kJ/m² 342
Melting temperature °C 165

Release date 02/2013. This data sheet supersedes all previous editions, which thereby become invalid. The data listed refers to a specific composition only and were tested in accordance with DIN EN ISO. The mechanical chararacteristic values depend on many factors of material used and processing parameters. Any use of this information must be clarified with SKM GmbH. SKM GmbH does not assume any responsibility for any use of this information not clarified with SKM GmbH.


Structure examples OLU-Preg®

SKM OLU-Preg Structure-Examples


Application Examples OLU-Preg®

SKM OLU-Preg Struktur-Fächer – Material Fan

Organic sheets available in various RAL colours,
thickness starting at 0.4 mm

SKM OLU-Preg   Unterbodenschutz Automotive – underbody protection

Underbody protection,

SKM OLU-Preg Schutzabdeckung für Landmaschine  – Protection cover for argicultural machine

Protection cover for
argicultural machine



In Zusammenarbeit

SKM OLU-Preg R&D Partnership

Eine gemeinsame Entwicklung mit der TU Chemnitz, Institut für Strukturleichtbau und Sportgerätetechnik