REINFORCED PLASTICS COMPOSITES, GDP KORAL s.r.o.

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Section Material Properties

Contact

If you have some question, request or suggestion, you will contact us by e-mail, phone or on-line contact form.
If we can, we will readily answer.

Phone:
+420 549 410 189

Fax:
+420 549 410 086

E-mail:
marketing@gdpkoral.com

Quick overview

GDP KORAL s.r.o.

It´s a partnership of French company GDP SA, which are engaged in pultruded profiles and load-carrying constructions, and Czech company KORAL s. r. o., supplier of full range of materials and things for lamination. We are section of company GDP Group, which proposes, produces and supplies solutions on the basis of plastics composites by production plants in France, Spain and Czech Republic.

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Technology of manufacturing

Plastics composites are produced by many various technologies. Company GDP KORAL is specialized in highvolume continual technologies, mainly pultrusion and pressing.

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What are composite materials?

Composites are defined as materials, which are consisted of two or more components variant physical and chemical properties.

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ISO 9001, ISO 14001

Material Properties

Comparative properties:

Strength (MPa)

  • Reinforced plastics 250 - 900
  • Steel 480 - 600
  • Stainless steel 630 - 650
  • Aluminium 290

Modulus of elasticity (GPa)

  • Reinforced plastics 17 - 45
  • Steel 206
  • Stainless steel 210
  • Aluminium 69 - 75

Thermal conductivity (W/K.m)

  • Reinforced plastics 0.0 - 0.7
  • Steel 52 - 63
  • Stainless steel 33
  • Aluminium 84 – 170

Density (g/cm3)

  • Reinforced plastics 1.6 - 2.0
  • Steel 7.85
  • Stainless steel 7.70
  • Aluminium 2.7

General properties of reinforced plastics composites:

Mechanical properties

  • Modulus of elasticity 17 – 45 GPa
  • Tensile strength 250 – 900 MPa
  • Tensile failure elongation 2%
  • Bending strength 750 MPa
  • Compressive strength 400 MPa

Thermal properties

  • Coefficient of linear expansion 8–10.10-6 K-1
  • Thermal conductivity 0,2 – 0,4 W/m.K

Pultruded profiles can be used without restriction between -20 and +80°C, in the cases of special resins -20 and +150°C.

Dielectric properties

  • Dielectric constant 6 – 12 kV/mm
  • Specific resistance 1012 Ohm/m

Physical properties

  • Density 1.6 – 2.0 g/cm3
  • Barcol hardness 40 – 55

Chemical resistance

 Methyl-methacrylateIsoftalic polyesterVinylester
Acids ** ** ***
Bases * * **
Chlorinated solvents - - *
Organic solvents - - *
Sea water  ** ** ***
Petrol/Diesel oil ** ** ***
Industrial detergents *** *** ***
Weather *** *** ***

- not recommended | * resistant | ** very resistant | *** excellent resistant 

 

Data sheet are sent at request.