PET film testing service

PET Film Testing Service for Global Packaging and Industrial Applications

As an ISO/IEC 17025 accredited laboratory, we deliver a comprehensive PET film testing service that verifies the mechanical, thermal, optical, barrier, electrical, and chemical properties of polyethylene terephthalate films. Our PET film testing service supports manufacturers and exporters of BOPET, APET, and specialty PET films who must demonstrate conformity to ASTM, ISO, EN, and regional packaging, electronics, and food contact regulations across the European Union, North America, the Middle East, and Asia. Every test is performed under our CNAS-accredited quality system, producing reports accepted by notified bodies, brand owners, and procurement teams worldwide.

Product Samples We Regularly Test in Our PET Film Testing Service

Biaxially oriented PET films — for flexible packaging, labels, lamination, and graphic arts
APET and CPET films — for thermoformed trays, blister packs, and food containers
Metallized and coated PET films — for barrier packaging, solar backsheets, and decorative applications
PET insulation films — for motors, transformers, capacitors, and flexible printed circuits
Anti-static and conductive PET films — for electronic packaging and cleanroom applications
Heat-sealable and shrinkable PET films — for lidding, sleeves, and tamper-evident packaging
Recycled and bio-based PET films — for sustainable packaging and circular economy verification

Physical and Mechanical Property Testing of PET Film

Tensile strength and elongation at break per ISO 527-3 and ASTM D882 — the PET film is stretched to failure in machine and transverse directions to measure breaking force, ultimate tensile strength, and percentage elongation, ensuring the film withstands printing, laminating, and packaging machine stresses without tearing.
Tear resistance by Elmendorf method per ISO 6383-2 and ASTM D1922 — the force required to propagate a tear from an initial slit is measured, verifying the film resists damage from sharp objects and handling.
Puncture and probe resistance per ASTM D5748 and EN 14477 — a probe is driven through the film at a controlled rate to determine puncture force and elongation, critical for packaging films used with sharp-edged products.
Dart drop impact resistance per ASTM D1709 and ISO 7765-1 — a weighted dart is dropped onto the film to measure the energy required to cause failure, simulating impact from product corners and sudden shock loads.
Coefficient of friction per ISO 8295 and ASTM D1894 — the static and dynamic friction of the film surface are measured to control slip behaviour on automatic filling and sealing lines and to prevent blocking.
Stiffness and secant modulus per ASTM D882 — the film's resistance to bending and initial stretching is quantified for predicting web handling, die-cutting, and lay-flat performance.

Thermal and Dimensional Stability Testing of PET Film

Differential scanning calorimetry for melting point and glass transition per ISO 11357-3 and ASTM D3418 — the thermal transitions of the PET film are measured to verify the resin grade and to define the processing window for heat sealing, thermoforming, and shrink operations.
Dimensional stability under heat per ASTM D1204 and ISO 11501 — the film is exposed to elevated temperature and the percentage linear shrinkage or expansion is recorded to ensure the film remains stable during hot filling, retort, lamination, or high-temperature storage.
Heat shrinkage and shrink tension per ISO 14616 and ASTM D2732 — for shrinkable PET films, the percentage shrinkage and the force exerted during shrinkage are measured to verify the film provides the required tight, wrinkle-free packaging.
Thermogravimetric analysis per ASTM E1131 — the mass loss profile up to 600 °C quantifies moisture, additives, and PET content, detecting any volatile contaminants that could outgas during processing or end use.
Heat seal strength and hot tack per ASTM F88 and ASTM F1921 — the force required to peel a heat seal and the strength of the seal while still hot are measured to validate sealing performance on high-speed form-fill-seal machines.
Low-temperature flexibility and brittleness per ASTM D1790 — the film is conditioned at sub-zero temperatures and flexed to ensure it remains pliable and does not crack during cold storage or winter transport.

Optical and Surface Quality Testing for PET Film

Total luminous transmittance and haze per ASTM D1003 and ISO 14782 — the percentage of transmitted light and the scattered light are measured using a spectrophotometer with integrating sphere, ensuring clarity and visual appeal for packaging, display, and optical applications.
Gloss at specified angles per ASTM D2457 and ISO 2813 — specular reflectance at 20°, 60°, and 85° is measured to quantify the surface shine and to match the aesthetic requirements of the brand.
Color measurement and color difference per ISO 7724 and ASTM E308 — CIE L*a*b* coordinates and delta E values are determined to verify color consistency and to ensure printed graphics reproduce accurately.
Surface energy and wetting tension per ASTM D2578 and ISO 8296 — dyne pen or contact angle measurement confirms that corona, flame, or chemical treatment has achieved the required surface energy for ink adhesion and lamination bonding.
Surface roughness and profile per ISO 4287 — stylus profilometry quantifies the Ra and Rz values to verify the specified smooth, matte, or textured finish.
Visual defect inspection under D65 illumination — systematic examination for gels, specks, fisheyes, streaks, and die lines against agreed acceptance criteria.

Barrier and Permeation Testing for PET Film

Oxygen transmission rate per ASTM D3985 and ISO 15105-2 — the oxygen permeability is measured using a coulometric sensor to verify the oxygen barrier needed for shelf-life extension of oxygen-sensitive products.
Water vapor transmission rate per ASTM F1249 and ISO 15106-2 — a modulated infrared sensor measures the moisture vapor permeability to confirm the film provides the required moisture barrier.
Carbon dioxide and nitrogen transmission rate per ASTM F2476 — for modified atmosphere packaging films, the permeability to CO2 and N2 is determined to predict package headspace composition changes.
Aroma and solvent barrier by gravimetric permeation cells — the film's ability to retain flavor compounds and resist penetration by organic solvents is evaluated.
Light and UV transmission through the film per ASTM E1348 and ISO 13468 — for photosensitive products, the spectral transmittance is measured to verify the specified opacity and UV blocking function.

Electrical Insulation and Dielectric Testing for PET Film

Dielectric strength and breakdown voltage per ASTM D149 and IEC 60243-1 — the voltage at which electrical failure occurs through the PET film is measured to verify its insulation capability for motors, transformers, and capacitors.
Volume and surface resistivity per ASTM D257 and IEC 60093 — the electrical resistance through and across the film is measured under controlled humidity to confirm it meets insulation resistance requirements.
Dielectric constant and dissipation factor per ASTM D150 and IEC 60250 — the relative permittivity and loss tangent are determined at specified frequencies to qualify the film for high-frequency and signal integrity applications.
Comparative tracking index per IEC 60112 — the resistance of the film surface to tracking under voltage and contamination is evaluated for safety in electrical insulation.
Insulation resistance after thermal and humidity conditioning — the PET film is conditioned in a damp heat environment and the insulation resistance is remeasured to ensure dielectric stability under environmental stress.

Chemical Safety and Restricted Substance Compliance for PET Film

RoHS compliance per IEC 62321 and EU Directive 2011/65/EU — quantitative screening for lead, mercury, cadmium, hexavalent chromium, PBBs, and PBDEs in the film, pigments, and coatings.
REACH Annex XVII and SVHC screening — targeted analysis of Substances of Very High Concern including specific phthalate plasticizers and organotin stabilizers.
Overall migration and specific migration for food contact per EU Regulation 10/2011 and FDA 21 CFR — the PET film is exposed to food simulants and the total extractable mass and specific migrant levels are quantified to confirm safety for direct food contact.
Heavy metals in packaging per EU Directive 94/62/EC — verification that the sum concentration of lead, cadmium, mercury, and hexavalent chromium in the film and its packaging is below the 100 ppm limit.
Polycyclic aromatic hydrocarbons per AfPS GS 2019:01 PAK — for carbon-black-filled or dark-colored PET films, the 15 restricted PAHs are extracted and quantified.
Halogen content by combustion ion chromatography per EN 14582 — the total fluorine, chlorine, bromine, and iodine content is measured to support halogen-free declarations.

Environmental Durability and Aging Testing for PET Film

Accelerated weathering by xenon-arc exposure per ASTM G155 and ISO 4892-2 — the PET film is subjected to simulated sunlight, heat, and moisture cycles, and the color change, gloss loss, and retained mechanical properties are evaluated to predict outdoor service life.
UV resistance by fluorescent lamp exposure per ASTM G154 — isolating the ultraviolet degradation mechanism to detect yellowing and embrittlement.
Damp heat and humidity conditioning per IEC 60068-2-78 — the film is exposed to 85 °C and 85% relative humidity followed by mechanical and barrier retests to confirm no hydrolytic degradation.
Resistance to oils, greases, and household chemicals per ISO 175 and ASTM D543 — the film surface is exposed to common kitchen and industrial fluids to verify no swelling, softening, or loss of mechanical integrity.
Biodegradation and compostability for biodegradable PET alternatives per ISO 14855-1 and ASTM D6400 — for bio-based or compostable films, the degradation rate is measured to support environmental claims.
Recyclability and material identification per ISO 11469 — the PET film is analyzed by FTIR or DSC to confirm the polymer type and support recycling stream classification.

Report Recognition and ISO/IEC 17025 Compliance

All test methods described in this PET film testing service are included within our ISO/IEC 17025 scope of accreditation. Our technical reports are accepted by European notified bodies for food contact materials and packaging compliance, by North American brand owners and electronics OEMs referencing ASTM and IEC standards, and by customs and regulatory authorities across the Middle East, Australia, and Asia. Whether you require a complete qualification dossier for a new PET film, a batch release inspection for an export shipment, or a root cause failure analysis of a film performance defect, our laboratory provides the measurement accuracy and technical expertise that the global flexible packaging and industrial film industries demand.