Polymer reverse engineering: solving an industrial dual-sourcing challenge

A supply disruption affecting a resin, compound, additive or plastic part can jeopardize production continuity. The challenge is often twofold: identifying the composition of an existing material and selecting a replacement solution compatible with processing and end-use requirements.

Polymer reverse engineering makes it possible to characterize a reference sample, compare several alternatives and identify differences that may influence the expected properties: matrix type, fillers, reinforcements, plasticizers, stabilizers, pigments or contamination. This approach helps objectively assess a sourcing issue and reduce technical uncertainty before qualifying a new source.

To complete the investigation, the Filab laboratory offers plastics and polymer analysis services.

Depending on the sample and the methods selected, characterization can provide information about the polymer family, mineral fillers, reinforcing fibers, pigments, certain organic additives, as well as detectable degradation products or contaminants. The interpretation takes into account the potential heterogeneity of a part, pellet, film, coating or multi-material assembly.

Scanning electron microscopy (SEM) polymer analysis can notably contribute to observing morphology and performing localized elemental characterization of certain areas.

The analytical strategy is developed on a case-by-case basis. It may combine spectroscopic techniques to identify the matrix and organic compounds, microscopy methods to examine heterogeneities, and elemental and thermal analysis. Cross-referencing the results is essential for interpreting a complex formulation and distinguishing the main constituents from compounds present at low concentrations.

The Filab laboratory adapts the testing plan to the available quantity, sample geometry and expected decision level.

Reverse engineering provides an analytical characterization of the material under study and highlights differences or similarities between samples. It does not guarantee the identical reconstruction of an industrial formulation, because process parameters, raw material grades, compounding expertise and certain components may not be fully accessible through analysis.

Nevertheless, the results provide a robust basis for defining a material’s target profile, communicating with suppliers and prioritizing validation tests.

At the Filab laboratory, the process begins by defining the industrial need: the material to be reproduced or replaced, the part’s function, processing conditions, regulatory requirements and comparison criteria. The analysis are then selected according to the nature of the sample and the question being addressed.

The objective is not to formulate a manufacturing recipe, but to produce actionable analytical data for comparing materials, guiding the search for suppliers and defining a qualification plan. The results can notably identify detectable constituents, assess similarities between a reference and an alternative, and prioritize differences requiring further investigation.

When requirements concern regulated substances, a dedicated assessment may be considered through REACH analysis applied to polymers.

The comparison focuses on parameters suited to the intended function: chemical signature, relative filler content, presence of reinforcements, thermal behavior, elemental composition or morphological features. It helps distinguish apparent equivalence from substantiated analytical similarity.

However, an analytically similar alternative must still be validated against the constraints specific to the application: processing method, assembly, operating environment, and mechanical, thermal, aesthetic or regulatory requirements.

Thermal analysis provides useful information for comparing how a material behaves when exposed to heat: mass loss, non-volatile fraction, mineral residue and characteristic transitions, depending on the method used. This data contributes to assessing differences between a legacy material and a sourcing alternative.

The Filab laboratory performs TGA polymer analysis to support the study of thermal stability and residual fractions in polymer samples.

Material replacement must be confirmed under conditions representative of the application. Reverse-engineering data can be used to select candidates for testing, while processing, performance and compliance tests remain to be defined by the industrial company according to its specifications.

This step-by-step approach reduces the risk of selecting an alternative material with differences incompatible with the function, process or operating environment.

To prepare the study, send Filab laboratory representative samples of the reference material and, if available, alternatives for comparison. Specify the function of the part or material, operating constraints, processing method, defects observed, decision criteria, and sourcing context.

Contact Filab laboratory to define the analytical scope, compare the available samples, and receive a suitable testing proposal. Anticipate qualification lead times by integrating the analysis as soon as a supply risk is identified.