Materials guide
Laser cutting, engraving and marking of composites
A composite combines several constituents with different properties. A fiber-reinforced polymer and a multilayer signage panel are not necessarily processed in the same way. Before considering laser cutting, engraving or marking, it is necessary to know the exact composition and check the limits specified by the material and equipment manufacturers.
Identify every layer, not just the reinforcement
The designation “composite” does not constitute authorization to process the material. Ask for the material reference, the type of matrix or resin, the type of reinforcement, coatings, adhesives and any additives. Gather the technical data sheet and safety data sheet, where available. If the formulation is unknown, do not run a trial to find out how it reacts to the laser.
To prepare a project with NWS LASER, exclude PVC and materials containing halogens from your laser trials. Also check the exact composition of flame-retardant products, including their additives. For carbon-fiber composites or composites made with epoxy or phenolic resins, do not transfer a validation from another material: a specific assessment of emissions and risks is required before any trial, provided the applicable documentation allows the material to be processed. This does not constitute material or machine validation. Extraction alone does not make an excluded material acceptable.
Three operations, three results to qualify
Cutting aims to separate the part through its thickness. Engraving removes material from the surface; marking primarily aims to produce readable information, such as a serial number, barcode or logo. A satisfactory surface result therefore does not demonstrate that cutting is feasible. The choice of laser source and wavelength must be validated for the actual assembly, thickness and intended result, rather than inferred from the material name alone.
For a multilayer signage panel, specify to NWS LASER whether the goal is contrast between layers, deep engraving or through-cutting. The composition of each layer must be checked; the word “acrylic” does not validate the entire panel. A result on such a panel cannot be applied to a structural laminate, a different resin or another machine configuration.
Arrange a representative trial before production
Once the material has been identified and its processing is permitted by the applicable documentation, provide a representative sample of the final part, with the same layers and coatings. Define the acceptance criteria before the trial. A readable logo is not sufficient to qualify the integrity of a functional part. Keep a record of the material reference, tested configuration and results; a change in formulation requires a new check.
- For cutting: check dimensions, edges and signs of heat damage.
- For a multilayer assembly: examine layer adhesion and check for any delamination.
- For engraving: check the required depth and surface condition.
- For marking: check contrast, code readability and durability under the intended conditions of use.
Assess emissions and fire risk
INRS points out that laser equipment presents chemical risks and that Class 4 lasers may also present a fire hazard. In its statement on handheld laser equipment, it recommends capturing pollutants, supplemented by suitable general ventilation. This document does not characterize emissions from your composite: their nature and the means of capture and treatment must be assessed for the selected material and process.
Plan this assessment before trials, together with fire prevention measures and equipment-monitoring instructions. Follow the manufacturer's documentation for use, maintenance and protective measures. INRS recommends containing the radiation where the application permits and training operators. Do not disable any interlock; neither an enclosure nor an extractor eliminates the need to assess other risks.
Prepare your inquiry to NWS Laser
Pour discuter de la faisabilité, transmettez la référence et la documentation du composite, son épaisseur, un plan et l’opération souhaitée. Précisez les tolérances, les contraintes fonctionnelles et la quantité envisagée. Contactez NWS Laser à info@nwslaser.fr ou au +33 4 81 68 04 04. Une demande ne constitue pas une validation matière ou machine.
Frequently asked questions
- Can all composites be processed with a laser?
- No. The composition of each layer and the manufacturer's restrictions are decisive. A material grade documented for engraving is not automatically validated for cutting.
- Can a carbon/epoxy composite be cut like an acrylic laminate?
- No, these materials are not equivalent. The fibers and epoxy matrix require a specific assessment of emissions and risks, as well as the integrity of the part. A result on an acrylic panel does not validate a carbon/epoxy composite. Prepare your inquiry to NWS LASER with the exact reference and material documentation; no trial should take place before this assessment or circumvent a manufacturer exclusion.
- Is a successful trial enough to move to production?
- No. Functional criteria, expected repeatability and risk control must also be checked. The trial does not replace material documentation or override a manufacturer exclusion.
Sources and documentation
NWS LASER
Your context, before the solution.
Specify the material, model or need, operating constraints and available documentation. The NWS Laser team will help you identify the next useful step.