Extruded board testing service

Extruded Board Testing Service – Accredited Mechanical, Thermal, Fire and Durability Evaluation for Global Markets

Our internationally accredited laboratory delivers a specialist extruded board testing service that supplies manufacturers of plastic sheet products, construction‑material suppliers, sign and display converters, automotive component producers, and furniture fabricators worldwide with the independent, traceable data they need to verify the mechanical strength, thermal stability, dimensional accuracy, flame retardancy and long‑term weatherability of their extruded thermoplastic boards. Every measurement is conducted under the rigorous framework of ISO/IEC 17025, and each report bearing the ILAC mark is unconditionally accepted by regulatory authorities, notified bodies and supply‑chain partners in all major economies. The extruded board testing service subjects the sheet or the panel to a comprehensive suite of physical, mechanical, thermal, optical and environmental‑ageing evaluations, quantifying the flexural modulus, the tensile strength, the impact resistance, the heat‑deflection temperature, the coefficient of linear thermal expansion, the surface hardness, the colour and the gloss, and the resistance to ultraviolet radiation, humidity and chemical attack. For a producer certifying a rigid PVC foam board for the outdoor‑signage market, an automotive‑interior supplier qualifying a polypropylene sheet for a door‑panel application, or an importer verifying the conformance of a batch of ABS sheets to the ISO 15013 or the ASTM D4673 standards, this service delivers the legally robust, defensible data that underpin product certification, fabrication‑process control and the guarantee of the long‑term aesthetic and structural performance.

Product Samples We Regularly Subject to Extruded Board Testing

The universal testing machines, the pendulum impact testers, the thermal‑analysis instruments, the spectrophotometers, the accelerated‑weathering chambers and the coordinate‑measuring systems in our facility accommodate a broad variety of extruded board materials, thicknesses and surface finishes. The following categories represent the most frequently tested items:

Rigid PVC and PVC‑foam boards – the free‑foam and the celuka‑process boards used for the sign‑making, the exhibition‑stand construction, the furniture components and the building‑industry cladding
Polypropylene and the glass‑fibre‑reinforced polypropylene sheets – the solid and the corrugated extruded sheets for the automotive under‑body shields, the battery‑enclosure components and the reusable packaging
High‑density polyethylene and the ultra‑high‑molecular‑weight polyethylene boards – the abrasion‑resistant and the low‑friction sheets for the industrial‑lining, the marine‑fender‑facing and the food‑processing surfaces
Acrylonitrile‑butadiene‑styrene and the polycarbonate sheets – the thermoformable and the fire‑retardant grades for the automotive‑interior trim, the electrical enclosures, the medical‑device housings and the aircraft‑cabin panels
Polystyrene and the high‑impact polystyrene boards – the extruded sheets for the thermoformed packaging, the refrigerator‑liners and the point‑of‑sale displays
Polycarbonate and the polymethyl‑methacrylate multi‑wall sheets – the twin‑wall, the triple‑wall and the solid extruded sheets for the architectural glazing, the greenhouse coverings and the noise‑barrier panels
Co‑extruded and the laminated multi‑layer boards – the products that combine a weatherable surface layer with a rigid core, such as the ASA‑capped ABS or the PMMA‑capped PVC, for the outdoor‑cladding and the automotive‑exterior applications
Aged, weathered and the chemically‑exposed extruded board specimens – the samples that have undergone the thermal‑cycling, the UV‑radiation or the aggressive‑fluid immersion, submitted for the residual‑property assessment and the failure‑mode analysis

Mechanical and Physical Properties – Extruded Board Testing According to ISO 178, ISO 527, ASTM D638 and ISO 179

Determination of the flexural strength, the flexural modulus and the deflection at break by the three‑point bending method according to ISO 178 (Plastics – Determination of flexural properties) and ASTM D790: a rectangular specimen is supported on two rollers and loaded at the mid‑span or at the quarter‑points, and the stress‑strain curve in the outer fibre is recorded. The flexural modulus and the maximum outer‑fibre stress at the failure are reported for both the extrusion direction and the transverse direction. This extruded board testing service provides the fundamental stiffness and the load‑bearing data that the design‑engineer uses to specify the correct sheet thickness for the self‑supporting span and the wind‑load resistance of the sign‑panel or the cladding element.
Tensile strength, the elongation at break and the tensile modulus according to ISO 527‑2 (Plastics – Determination of tensile properties – Part 2: Test conditions for moulding and extrusion plastics) and ASTM D638: a dumbbell‑shaped specimen is milled from the extruded board in the longitudinal and the transverse orientations and pulled at a constant crosshead speed. The yield stress, the ultimate tensile strength, the percentage elongation and the Young's modulus are reported, providing the data that the thermoforming‑simulation engineer uses to predict the material‑distribution and the thinning during the sheet‑forming process.
Charpy and the Izod impact resistance according to ISO 179‑1 (Plastics – Determination of Charpy impact properties) and ASTM D256 (Standard Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics): the notched and the un‑notched specimens are struck by a calibrated pendulum, and the energy absorbed during the fracture is reported, quantifying the toughness of the extruded board and its ability to survive the accidental impacts during the fabrication, the handling and the service.
Shore D and the Rockwell hardness according to ISO 868 (Plastics and ebonite – Determination of indentation hardness by means of a durometer) and ASTM D785: the surface hardness of the extruded board is measured, and the result is correlated with the scratch‑resistance, the machinability and the wear‑performance of the sheet in the high‑traffic and the abrasive environments.
Measurement of the density and the basis weight according to ISO 1183‑1 (Plastics – Methods for determining the density of non‑cellular plastics) and the internal procedures: the density in the grams per cubic centimetre and the mass per unit area in the grams per square metre are determined, providing the fundamental quality‑control parameters for the incoming‑goods inspection and the batch‑release.
Tensile and the flexural creep and the stress‑relaxation testing according to ASTM D2990 (Standard Test Methods for Tensile, Compressive, and Flexural Creep and Creep‑Rupture of Plastics) and the internal procedures: a constant load is applied to the extruded board specimen at an elevated temperature, and the time‑dependent deformation and the stress‑relaxation are recorded, providing the long‑term design data for the continuously‑loaded shelving, the cladding and the structural‑panel applications.

Thermal Performance and Dimensional Stability – Extruded Board Testing According to ISO 75, ISO 11357 and ASTM D648

Determination of the heat‑deflection temperature and the Vicat softening point according to ISO 75‑2 (Plastics – Determination of temperature of deflection under load) and ISO 306 (Plastics – Thermoplastic materials – Determination of Vicat softening temperature): the temperature at which the extruded board deflects by a specified amount under a defined flexural load, or is penetrated by a flat‑ended needle, is measured, defining the maximum service temperature for the load‑bearing and the short‑term thermal‑exposure applications. This extruded board testing service is routinely performed on every production batch to verify the correct polymer‑grade and the absence of the contamination.
Determination of the glass‑transition temperature and the melting temperature by the differential scanning calorimetry according to ISO 11357‑2 (Plastics – Differential scanning calorimetry – Part 2: Determination of glass transition temperature and step height) and ASTM D3418: a small sample of the board is heated at a controlled rate, and the Tg and the Tm are reported, confirming the polymer identity and the degree of the crystallinity.
Coefficient of linear thermal expansion by the thermomechanical analysis according to ISO 11359‑2 (Plastics – Thermomechanical analysis – Determination of the coefficient of linear thermal expansion) and ASTM E831: the dimensional change of the extruded board with the temperature is recorded, and the CTE in the parts per million per kelvin is reported, providing the essential data for the design of the expansion joints, the fixing‑slots and the calculation of the thermal‑expansion clearances in the building‑envelope and the vehicle‑body applications.
Dimensional stability under the heat and the humidity according to ISO 23999 (Resilient floor coverings – Determination of dimensional stability after exposure to heat) and the internal procedures: a precisely measured specimen is exposed to a specified elevated temperature and the relative humidity for a defined period, and the percentage change in the length, the width and the thickness is reported, verifying that the board will not warp, bow or shrink during the storage, the installation and the service.

Fire Performance and Flammability – Extruded Board Testing According to ISO 5660, ASTM E84, UL 94 and EN 13501‑1

Determination of the heat‑release rate, the total heat release and the smoke production by the cone‑calorimeter method according to ISO 5660‑1 (Reaction‑to‑fire tests – Heat release, smoke production and mass loss rate) and ASTM E1354: a specimen of the extruded board is exposed to a defined radiant‑heat flux, and the ignition time, the peak heat‑release rate, the total heat released and the specific extinction area (the smoke parameter) are measured, providing the fundamental fire‑hazard data that the risk‑assessment engineer uses to evaluate the contribution of the board to a room‑fire scenario. This extruded board testing service is mandatory for the fire‑safety approval of the interior‑finish materials in the building and the transportation sectors.
Surface‑burning characteristics – the flame‑spread index and the smoke‑developed index according to ASTM E84 (Standard Test Method for Surface Burning Characteristics of Building Materials) and the equivalent CAN/ULC‑S102: the extruded board is mounted in the Steiner‑tunnel apparatus, and the flame‑spread and the smoke‑density are measured, providing the classification data that are required for the acceptance of the board in the North American and the Middle‑Eastern building codes.
Vertical‑burn and the horizontal‑burn testing according to UL 94 (Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances) and the IEC 60695‑11‑10 (Fire hazard testing – Test flames – 50 W horizontal and vertical flame test methods): the extruded board is subjected to a defined gas‑flame, and the after‑flame time, the after‑glow time and the dripping‑ignition of the cotton indicator are recorded, providing the V‑0, the V‑1, the V‑2 or the HB flammability rating that is required for the electrical‑enclosure, the appliance and the consumer‑product safety certifications.
Limited‑oxygen‑index measurement according to ISO 4589‑2 (Plastics – Determination of burning behaviour by oxygen index) and the internal procedures: the minimum oxygen concentration that supports the flaming combustion of the extruded board is determined, providing the comparative, intrinsic‑flammability data that the compounder uses to optimise the flame‑retardant package.

Weathering, UV Resistance and Environmental Durability – Extruded Board Testing According to ASTM G154, ISO 4892 and ISO 175

Accelerated weathering and the UV‑radiation resistance according to ASTM G154 (Standard Practice for Operating Fluorescent Ultraviolet Lamp Apparatus for Exposure of Non‑Metallic Materials) and ISO 4892‑2 (Plastics – Methods of exposure to laboratory light sources – Part 2: Xenon‑arc lamps): the extruded board is exposed to a cycle of the UV‑A or the UV‑B radiation, the heat and the condensation, and the colour‑change, the gloss‑loss, the surface‑chalking and the retained tensile and the flexural strength are evaluated, predicting the outdoor‑storage and the exposed‑service life of the board in the building‑façade, the sign‑panel and the marine‑decking applications. This extruded board testing service is the cornerstone of the Qualicoat, the AAMA and the ISO 12944 weathering‑durability certifications.
Resistance to the chemical reagents – the acids, the alkalis, the solvents, the oils and the cleaning agents – according to ISO 175 (Plastics – Methods of test for the determination of the effects of immersion in liquid chemicals) and ASTM D543: the extruded board specimen is immersed in the test liquid at the elevated temperature for a defined period, and the change in the mass, the dimensions, the tensile properties and the appearance is reported, certifying the compatibility of the board with the graffiti‑removers, the industrial‑cleaners and the process‑fluids.
Water‑absorption and the resistance to the hydrolytic degradation according to ISO 62 (Plastics – Determination of water absorption) and ASTM D570: the board specimen is immersed in the distilled water at 23 °C and at 100 °C, and the mass‑gain versus the time is recorded, providing the equilibrium‑water‑content and the diffusion‑coefficient that are used to predict the dimensional‑stability and the mechanical‑property changes in the humid and the submerged environments.
Resistance to the mould and the fungal growth according to ASTM G21 (Standard Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi) and the internal procedures: the extruded board is inoculated with the spores of the Aspergillus niger, the Penicillium funiculosum and the other common indoor fungi, and the extent of the mould coverage after the incubation is rated, providing the data that the specifier uses to approve the board for the humid, the condensation‑prone and the healthcare environments.

Surface Quality and Optical Properties – Extruded Board Testing for Aesthetic and Functional Surfaces

Measurement of the specular gloss at 20°, 60° and 85° according to ISO 2813 (Paints and varnishes – Determination of gloss value at 20°, 60° and 85°) and ASTM D523: the gloss meter is placed on the extruded board surface, and the gloss value in the gloss units is reported for the three angles, providing the data that the quality‑assurance team uses to verify the consistency of the finish and to detect any die‑lines, the melt‑fracture or the surface‑imperfections. This extruded board testing service is a mandatory batch‑release test for every production run of the architectural and the sign‑panel boards.
Colour measurement and the colour‑difference evaluation according to ISO 7724‑3 (Paints and varnishes – Colorimetry – Part 3: Calculation of colour differences) and ASTM D2244: the CIELAB colour coordinates L*, a* and b* are measured by a spectrophotometer, and the total colour difference ΔE* relative to the master standard or the approved colour‑chip is calculated. The result must be within the agreed tolerance to guarantee the colour harmony across the different batches and the building‑elevation panels.
Surface‑roughness measurement by the stylus‑profilometry according to ISO 4287 (Geometrical Product Specifications – Surface texture: Profile method) and the internal procedures: the arithmetic mean roughness Ra and the mean peak‑to‑valley height Rz are measured on the extruded surface, providing the data that the paint‑adhesion, the printing‑ink‑receptivity and the adhesive‑bonding performance are optimised.

Report Acceptance and Global Regulatory Compliance

All measurements performed within our extruded board testing service are executed under the fully accredited scope of our ISO/IEC 17025 quality management system. Each test report that carries the ILAC mark is therefore automatically recognised by regulatory authorities, notified bodies, customs offices and supply‑chain partners in all major economies. For extruded‑board manufacturers, sign‑panel converters, construction‑product suppliers, automotive‑component producers and furniture‑board importers anywhere in the world, the report constitutes legally robust, internationally accepted evidence that the mechanical strength, the thermal stability, the fire performance, the weathering resistance, the surface quality and the long‑term durability of the extruded board have been determined in accordance with the applicable ISO, ASTM, EN and customer‑specified methods. The documentation can be directly used to support CE marking under the Construction Products Regulation, the issue of inspection certificates according to EN 10204 or equivalent national standards, the compilation of the technical file for the type‑examination, and the resolution of commercial and technical disputes concerning the quality and the long‑term performance of any extruded thermoplastic board.