Fraunhofer FEP has established a set of proven workflows to characterise plastic web surfaces regarding their surface quality to evaluate the performance of the plastic web for different use scenarios, e.g.:
- Permeation barrier coatings
- Using the web as substrate for flexible electronics
- processabiliy at higher temperature
Therefore, we use a set of multiple characterisation methods such as:
- Surface properties and imaging (including defects, particles, surface morphology and roughness analysis)
- Optical and Confical Microscopy
- White Light Interferometry
- Atomic Force Microscopy
- Scanning Electron Microscopy
- Hyperspectral imaging
- Mechanical and Thermomechanical properties
- Adhesion testing (cross-cutting test; peeltest according to IPC-TM650)
- Abrasion resistance test, pencil hardness test and nano indentation
- Linear strain test, and evaluation of Young’s modulus
- Temperature dependent Young’s modulus
- Optical Properties
- Transmittance and Reflectance Spectra from 300 nm … 2500 nm wavelength (UV-VIS-Spectrometer)
- Directed, scattered and total transmittance and reflectance
- Visual Light Transmittance, Reflectance and Absorbance
- Haze and Glare
- Chemical and structural Properties
- Organic bonds (Infrared Absorption Spectroscopy)
- Atomic Composition (GD-OES)
- Crystallinity (X-ray diffraction analysis)
- Wettability and surface energy
- Accelerated Ageing Testing
- Outdoor weathering tests
- Damp-Heat-Storage (85°C/85% r.h.)
- Permeability
- Water vapor tranmsission rate (10 … 85°C)
- Oxygen transmission rate (at 23°C/0% r.h.)