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Optimum safety and reliability is achieved by a comparison among different laboratories - coordinated by the Kunststoff-Institut.

By participating in the so-called proficiency test, laboratories are testing themselves and each other in order to verify their own test procedures as well as their comparability. The procedure is very simple yet highly efficient: equivalent samples are sent to the laboratories where they are then analyzed according to previously defined parameters. The results are then sent to the Kunststoff-Institut for evaluation. "As long as they are within a certain tolerance range, everything is OK. If one of the laboratories produces individual values that drastically deviate from the others, something went wrong with the test". Proficiency testing will be carried out once a year.

A large number of different laboratories is taking part each year, a total number of 114 institutes and companies from 11 countries (such as the USA, Malaysia, Spain, Denmark, etc.) took part in the proficiency test series 2009, with roughly 500 registrations for 50 procedures. Participants ranged from the automotive industry and raw material producers to engineering consultants.
This is an indicator of the high quality of the procedure. By the way, the complete results will later be made anonymous and sent out to the participants. Only the corresponding laboratories will receive their own results, so they can react appropriately. This is of particular importance to accredited and/or certified laboratories, which are subject to increased quality demands. "The proficiency test is an important and well functioning corrective."

The participation in the proficiency test will enable you to see if the mechanical testing or analyses results are comparable to those achieved in other laboratories. They are, therefore, an important instrument of external quality control for laboratories and are used to determine and/or verify the accuracy of measuring methods, in which they document the performance of your own laboratory.

Participation in the proficiency tests is recommended, in particular, for test centres and laboratories certified per an ISO 9000 QA system or accredited per EN ISO/IEC 17025.
The performance of single requires a minimum of five participants. Participation in individual test procedures is possible. Samples and materials will be supplied by the Kunststoff-Institut Lüdenscheid. For each test method two materials or samples are provided.


Timing for the Proficiency Test 2010:

Deadline for Registration: Middle of February 2010
Distribution of samples: End of March 2010
Submit the results: June 2010
Final report (evaluation): August 2010


The following test and analysis methods are offered in 2010:

Exposure to sunlight and evaluation with greyscale and Colorimetry:

  • Light fastness acc. to VDA 75202 – 3 A4 NEW !!!
  • Sun light simulation acc. to DIN 75220 D-IN1-T NEW !!!

The evaluation is performed by the participant with greyscale and at the Kunststoff-Institut with greyscale and Colorimetry.

Mechanical properties of plastics:

  • Tensile test acc. to ISO 527 (Determination of the Yield modulus)
  • Tensile test acc. to ISO 527 (Determination of the tensile strength and elongation)
  • Tensile test at higher temperature acc. to ISO 527 (Determination of the yield modulus, tensile strength, elongation at break (1 material)
  • Tensile test at lower temperature acc. to ISO 527 (Determination of the yield modulus, tensile strength, elongation at break (1 material)
  • Flexural modulus acc. to ISO 178
  • 3.5 % flexural stress acc. to ISO 178
  • Flexural strength and elongation at flexural strength acc. to ISO 178
  • Charpy flexural impact acc. to ISO 179
  • Charpy flexural impact at -30°C acc. to ISO 179
  • Izod flexural impact acc. to ISO 180
  • Dynstat (notch-) flexural impact test acc. to DIN 53435
  • 3.5 % flexural stress / Dynstat acc. to DIN 53435
  • Instrumented impact test acc. to ISO 6603-2 NEW !!!

Specimen injection moulding and mechanical properties:

  • Specimen injection moulding (1A) and tensile test acc. to ISO 527 (Yield modulus and tensile strength)
  • Specimen injection moulding (1A) and flexural test acc. to ISO 178 (Flexural modulus and Flexural strength)
  • Specimen injection moulding (1A) and Charpy flexural impact acc. to ISO 179

Manufacturing of specimen (cutting) and mechanical properties:

  • Manufacturing of specimen (1A) and tensile test acc. to ISO 527 (Yield modulus and tensile strength) NEW !!!

Thermal properties of plastics:

  • Determination of the melting point and the enthalpy with DSC-Analysis acc. to ISO 11357-3
  • Determination of the glass transition temperature with DSC-Analysis acc. to ISO 11357-2
  • Determination of the Oxidation Induction Time (OIT) with DSC-Analysis acc. to ISO 11357-6
  • Determination of the glass fibres and talcum content with thermogravimetry-analysis (TGA) acc. to ISO 1135
  • Vicat softening point acc. to ISO 306
  • Heat deflection temperature acc. to ISO 75
  • Coefficient of linear thermal expansion acc. to DIN 53752

Rheological properties of plastics:

  • Melt flow/volume index MFR/MVR acc. to ISO 1133
  • Determination of the fluidity of plastics using capillary rheometers acc. to ISO 11443
  • Determination of dynamic mechanical properties / Complex shear viscosity using a parallel-plate acc. to ISO 6721-10

Chemical and physical properties of plastics:

  • Density acc. to ISO 1183 part 1
  • Determination of the viscosity number (concentrated sulphuric acid) acc. to ISO 307
  • Determination of the viscosity number (m-kresol) acc. to ISO 307
  • Determination of the viscosity number on PBT (phenol/1.2-dichlorbenzol) acc. to ISO 1628-5
  • Ash content acc. to 1172

Hardness of plastics:

  • Shore-D-Hardness acc. to ISO 868
  • Ball intention hardness acc. to ISO 2039 part 1

Burning behaviour of plastics:

  • Burning rate acc. to FMVSS 302 (DIN 75200)
  • Burning rate acc. to UL 94 HB

Emission properties of plastics:

  • Odourtest acc .to VDA 270
  • Formaldehyde emission acc. to 275
  • Total carbon emission acc. to VDA 277
  • Fogging / Method A (reflectometric fogging) acc. to DIN 75201
  • Fogging / Method B (gravimetric fogging) acc. to DIN 75201

Optical properties of plastics:

  • Determination of the gloss grade with reflectometer 60° acc. to ISO 2813 (DIN 67530)
  • Determination of the colour (8°/d) ΔL Δa Δb ΔE acc. to ISO 7724 (DIN 53236-A)
  • Determination of the colour (45/0) ΔL Δa Δb ΔE acc. to DIN 53236-B NEW !!!

Electrical properties of plastics:

  • Surface resistivity acc. to IEC 60093
  • Volume resistivity acc. to IEC 60093

Properties of rubber and TPE:

  • Tensile test acc. to ISO 37 (elongation at break and tensile strength)
  • Tensile test at higher temperature acc. to ISO 37 NEW !!!
  • Compression set at ambient acc. to ISO 815 on rubber
  • Tear strength of rubber / trouser test piece acc. to ISO 34-1
  • Tear strength of rubber / angle test piece acc. to ISO 34-1
  • Shore-A-Hardness acc. to ISO 868
  • IRHD-Hardness on rubber / TPE acc. to ISO 48 (method M)
  • Determination of the solvent extract acc. to ISO 1407 NEW !!!
  • Determination of the rebound resilience acc. to DIN 53512 (ISO 4662)
  • Abrasion resistance on rubber acc. to ISO 4649

Properties of plastic films:

  • Tensile test on plastic films acc. to ISO 527-3
  • Tear strength of plastic films acc. to DIN 53356
  • Tear test on plastic films - trouser tear method acc. to ISO 6383-1
  • Tear resistance Elmendorf method acc. to ISO 6383-2
  • T-Peel test acc. to ISO 11339
  • Determination of stiffness in bending - Method according to Cantilever acc. to DIN 53362
  • Film thickness acc. to ISO 4593
  • Determination of the coefficients of friction (static friction and kinetic friction) acc. to ISO 8295

Test methods and numbers of participants of the individual years:

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