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Test for "Material analysis"

Material identification of film substances, plastic packaging materials and multi-layer film or other plastic samples

Here you will find individual methods or wise combinations of methods for identification of materials and structure of plastic packaging materials, films in general, multi-layer films, defects (e. g. gels, fisheyes etc), contaminations, etc. For example, the number of the layers and the layer thickness distributions of multi-layer structures as well as the kind of materials and if required fillers, additives can be determined by additional anlysis. The investigation depth (1st stage e. g. PE, 2nd stage PE- LLD type Buten) and consequently the resulting costs can be adapted corresponding to the requirements.

Film construction/ material characterisation- Analysis package for a fixed price
Qualitative characterization of plastic films, laminates and plastic products concerning layer construction and basic materials, excepting adhesives, tie layers, inorganic coatings e.g. metallisations. Methods: DSC- Sreening (-20- 300°C/ 2 heating runs) of the material as recieved, microtome cut for analysis and documentation of number and thicknesses of visible layer, basic material of each layer by FT-IR spectroscopy, Beilstein test for presence of chlorine. Additional tests available by appointment.

Microtome section
cross section of films, moulded forms, sealed seams, etc. incl. thickness determination of visible layers with reflected or transmitted light microscope (accredited test method)

Infrared (IR)-spectroscopy
Identification of materials, contaminations, additives, laquers, adhesives etc. with different techniques depending on sample and problem

DSC/ thermal analysis: melting- and crystallisation behavior
DSC- run (Differential Scanning Calorimetry) for determination of crystal melting point Tpm and melting enthalpy delta H (further characteristics, e. g. crystallisation temperature Tc, depending on material, available on request) by means of two heating runs.

Analysis of gels/ particles (microplastic)
Analysis package for determining the position, size and material properties of gels in films or particles (e.g. food microplastics) including photo documentation. Methods depending on the task, e.g. infrared microscopy, microscopy, microtome cross-section, thermal analysis DSC

Coating weight of adhesives, lacquers, coatings, hotmelts;cold seal
gravimetric determination according FhG Merkblatt 11 Teil 1, results in [g/m²] Note: The application weight of the cured reactive adhesives- or laquer systems (e.g. polyurethane laminating adhesive in composite films or epoxylaqueres) mostly can not be determined, because the method works only by removability of the layer to be tested, e.g. by dissolving under usage of solvents. We recommend an orienting light microscopic measurement of the adhesive or lacquer layer thickness by means of a microtome cross section in such cases.

microscopical examination by light microscopy incl. photographic documentation
microscopical examination of any samples. Payment based on the time invested.

Ash content of plastic materials (polyolefins)
Gravimetric identification for analyzing films, granules etc. on basis of polyolefines (PE, PP) for inorganic shares like fillers, pigments, antiblocking aid etc. The chalk content of white pigments can be calculated from the weight loss by carbonate cleavage at two-step annealing 600/ 950 °C. Further analytical examination of ash composition on request.

DSC/ thermal analysis: determination of glass transission temperature
In the region of glass transition temperature, there is a sudden change in the heat capacity cp, what with a sudden change in the physical and technological properties is usually accompanied. So some polymers are below the glass transition temperature suddenly hard and fragile (for example PP), others can be thermoformed very well when exceeding the glass transition temperature (for example PET). The measurement by DSC is very smart, but not feasible at all polymers. We are happy to advise you.

Beilstein test
The Beilstein test is used for rapid qualitative detection of halogens, usually the proportion of chlorine (Cl) in PVC or PVDC based polymers. For verification we usually measure an infrared spectrum of the plastic material resp. material layer to be evaluated.

Density of plastic materials
DIN EN ISO 1183-1, of monofilms, granules, moulded articles etc. PET samples must have a minimum thickness of 0.3 mm, thin PET- films can not be tested with this method.

melt index (melt mass- flow rate) MFR (MFI)
melt mass- flow rate MFR (MFI) DIN EN ISO 1133 (test parameters acc. Annex B table B 1 e.g. PE: 190°C/ 2,16 kg; PP: 230°C/ 2,16 kg). We do not perform tests with weights of 5.0 and 10 kg.

moisture content/ water content (residual moisture)
The choice of the appropriate method depends essentially on the expected moisture content. Higher water contents can be determined gravimetrically well with the drying oven technique. When lower water contents are expected, the water selective Karl Fischer titration should be chosen, as incorrect measurements, for example by other volatile matters can be excluded. The Karl Fischer method is, however, not intended for determination of higher water contents.

PET Flake Clumping Evaluation according APR PET-S-08 (Association of Plastic Recyclers)
While processing PET flake can be exposed to heat over 190°C up to 220°C. It is important that flakes of PET do not stick together to form hard clumps when exposed to high temperatures and loading in a hopper. Clumps of PET can cause bridging in feed systems that prevent material flow. This test method can be used in the laboratory to evaluate whether there is low melting polymer or other source of contamination in washed and elutriated PET flake that can create clumps of PET flake under heated conditions.

Recycling incompatibilities - Investigation of material-specific recycling incompatibilities - Analysis bundles for a fixed price
Investigation of packaging components for material-specific recycling incompatibilities according to "Orientierungshilfe zu Bemessung zur Bemessung zur Bemessung zur Bemessung der Recyclingfähigkeit von sytembeteiligungspflichtigen Verpackungen", published by Stiftung Zentrale Stelle Verpackungsregister, Osnabrück Stand 11-2018, Annex 3. The scope of the investigation can be adapted to different order scenarios. Typical methods used are e.g. DSC screenings (-20 -300°C/ 2 heating runs), microscopic examinations on microtome cross sections for the visualisation of multilayer structures, FTIR spectroscopy with different techniques for the determination of the material types of the sample or the individual layers; Beilstein tests for chlorine, density determination, etc.. Additional detailed analyses may be necessary in individual cases; these will only be carried out after prior consultation of you.

Vicat softening temperature (VST)
Heat transfer medium: silicone oil. Sample thickness must be 3,0- 6,4 mm. From the thermoplastics PE, PP, PA in sheet or granule form specimen preparation can be made by melt molding.

VA content of E/VA-Copolymers
Detemination via IR- spectroscopy in combination withthermal analysis DSC.

OIT oxidation stability as oxidation induction time or oxidation induction temperature via DSC
ISO 11357-6 Oxidation resistance as Oxidation; dynamic (OIT= oxidation induction temperature) or isothermal (oxidation induction time) by Diffential Scanning Calorimetry DSC. In the isothermal method, the sample is heated under nitrogen atmosphere at a defined temperature, then switched to oxigen or air atmosphere and the time until the onset of oxidation is determined. For the dynamic test, the sample is heated under an oxigen or air atmosphere at a constant heating rate until onset of oxidation, the temperature at which the oxidation starts is determined.

solids content of adhesives, laqueres, printing inks (gravimetric determination)
Of liquid adhesives, laqueres, printing inks by gravimetric determination.

TGA-analysis (thermo- gravimetry)
TGA-analysis (thermo- gravimetry), determination of content of inorganic fillers and additives like calcium cabonate, carbone black,polymeric phase, including standard report