We test all relevant parameters of bonded joints, including characterisation of adhesives, bonded samples and their surfaces, as well as their pretreatment. Here, testing of the bonded joints is as important as analysing the durability of bonded joints, damage analysis, mechanical tests or the assessment of surface energy, preparatory treatment of surfaces, as well as their characterisation.


Assessment of physical and chemical composition
o adhesive basis
o primers
o fillers
o trace analysis for impurities (substances impairing adhesion)
o testing of curing processes
o substance migration
o solvent composition
o trace analysis for additives (e.g. plasticisers, biocides, stabilisers, cross-linkers, etc.)
o thermal analysis, e.g. low-temperature embrittlement and glass transition, softening temperature, temperature stability and thermal elasticity
o assessment of degree of curing, curing and setting behaviour, residual monomer and solvent contents
o mixing ratios in multi-component systems and resin-hardener systems
o determination of molecular weight and cross-linking degree
o acid value, degree of saturation/double-bond, ester and OH numbers


• Dimensioning (calculation) and testing of bonded joints
• Selection and optimisation of adhesives
• Resistance of bonded joints:
o to artificial weathering (e.g. EN ISO 4892-2/3, EN ISO 16474-1/3, EN ISO 11341, DIN 75220 (solar simulation)) and to ageing, as well as to natural weathering
o to corrosive influences such as humidity (e.g. EN ISO 6270-1/2), salt (e.g. EN ISO 9227), polluting gases, cyclic weathering tests
o to different media; diffusion and migration tests
o determination of thermoanalytical parameters
   - thermogravimetric analysis (TGA)
   - differential scanning calorimetry (DSC)
   - thermomechanical analysis (TMA)
   - dynamic mechanical analysis (DMA, DMTA)
• Determination and measuring of complex bonded joints
• Damage analysis
• Mechanical tests in the temperature range from -40°C to +250 °C:
o hardness testing: Shore A and B hardness, micro IRHD, ball indentation hardness, Barcol, Brinell and Rockwell hardness
o Vickers HDT heat resistance tests
o tensile, compression and flexural tests
o puncture impact and tear tests
o peel tests (roller peel tests, 90°/180° peel tests, climbing drum peel tests)
o flexural impact and tensile impact tests
o shear tests
o vibration tests
o tear tests (dynamic module, fatigue)
o creep and relaxation tests
o alternating load, dynamic load, S-N curve (up to 20 Hz, 10 kN, distance ±6 mm), rheology
• Non-destructive tests: 3D coating structure tests by means of scanning acoustic microscopy, testing of defective areas and delamination by means of active thermography (electrical, magnetic-inductive and ultrasonic stimulation), chemiluminescence
• Assessment, testing and modification of surface energy characteristics: determination of surface energy, wettability, surface activation (e.g. corona plasma, flame pretreatment)
• Surface pretreatment (mechanical, chemical, physical) and its characterisation
• Rheology
• Material compatibilities and interactions between adhesives and bonded samples
• Topographical analysis and photo documentation by means of high-resolution optical microscopy, FTIR and RAMAN microscopy, scanning electron microscopy
• Training (further training of adhesive specialists)