Plastic bag testing service

Comprehensive Plastic Bag Testing Service for Global Packaging Compliance

As an ISO/IEC 17025 accredited laboratory, we deliver a thorough plastic bag testing service that verifies mechanical strength, seal integrity, barrier properties, chemical safety, and environmental durability. Our plastic bag testing service supports manufacturers and exporters of polyethylene, polypropylene, biodegradable, and multi-layer plastic bags who must demonstrate conformity to ASTM, ISO, EN, and regional packaging 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 Plastic Bag Testing Service

• LDPE and HDPE plastic bags — for retail, grocery, garbage, and industrial packaging
• Polypropylene and BOPP bags — for food, apparel, and high-clarity display packaging
• Biodegradable and compostable plastic bags — PLA, PBAT, and starch-based bags for sustainable packaging
• Multi-layer and barrier plastic bags — with EVOH, nylon, or metallized layers for oxygen and moisture protection
• Zipper, slider, and resealable plastic bags — for consumer convenience and product freshness
• Anti-static and ESD-safe plastic bags — for electronic component packaging and cleanroom use
• Heavy-duty and industrial plastic bags — for construction, agriculture, and bulk material handling

Physical and Mechanical Property Testing for Plastic Bags

• Tensile strength and elongation at break per ISO 527-3 and ASTM D882 — the plastic film is stretched to failure in machine and transverse directions to measure the breaking force and stretch, ensuring the bag withstands filling, carrying, and handling 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 plastic bag resists failure from sharp product edges and rough handling.
• Puncture and probe resistance per ASTM D5748 and EN 14477 — a probe is driven through the film at a controlled rate to determine the puncture force and elongation, critical for bags carrying sharp or heavy objects.
• 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 the impact of 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 lines and to prevent blocking during storage and stacking.
• Stiffness and secant modulus per ASTM D882 — the film's resistance to bending and initial stretching is quantified to predict handling, opening, and lay-flat performance of the plastic bag.

Seal Integrity and Closure Performance Testing for Plastic Bags

• Heat seal strength per ASTM F88 and ISO 527-3 — the force required to peel open a heat seal made under defined temperature, pressure, and dwell time is measured to verify the plastic bag provides a hermetic closure that withstands filling, transport, and consumer use.
• Hot tack strength per ASTM F1921 — the strength of the seal is measured immediately after sealing while the film is still hot, simulating the force exerted by the product on the seal during high-speed form-fill-seal packaging.
• Seal integrity and leak testing by bubble emission and dye penetration per ASTM D3078 and ASTM F3039 — the sealed bag is submerged in water under vacuum or filled with a colored dye solution to detect pinholes, channel leaks, and weak seals that would compromise product protection.
• Zipper and resealable closure performance testing per customer protocols — the opening, closing, and sealing force of zipper bags are cycled to verify reliable resealing and consumer convenience over repeated use.
• Seal through contamination testing — the seal strength is measured after introducing controlled amounts of product, oil, or powder into the seal area to verify the plastic bag can form a reliable seal under realistic filling conditions.

Barrier and Permeation Testing for Plastic Bags

• Water vapor transmission rate per ASTM F1249 and ISO 15106-2 — a modulated infrared sensor measures the moisture vapor permeability of the plastic bag film, confirming the bag provides the required moisture barrier for the packaged product and shelf life.
• 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 oxygen-sensitive foods, pharmaceuticals, and electronic components.
• Carbon dioxide and nitrogen transmission rate per ASTM F2476 — for modified atmosphere packaging bags, the permeability to CO2 and N2 is determined to predict package headspace composition changes over shelf life.
• Aroma and solvent barrier by gravimetric permeation cells — the bag film's ability to retain flavour compounds and resist penetration by organic solvents is evaluated using a sealed cup method with analytical balance or GC detection.
• Light and UV transmission through the film per ASTM E1348 and ISO 13468 — for photosensitive products, the spectral transmittance of the plastic bag film is measured to verify the specified opacity and UV blocking function.

Chemical Safety and Restricted Substance Compliance for Plastic Bags

• RoHS compliance per IEC 62321 and EU Directive 2011/65/EU — quantitative screening for lead, mercury, cadmium, hexavalent chromium, PBBs, and PBDEs in the plastic film, pigments, and printing inks to ensure the bag meets global substance restrictions.
• REACH Annex XVII and SVHC screening — targeted analysis of Substances of Very High Concern including phthalate plasticizers, organotin stabilizers, and short-chain chlorinated paraffins present in the plastic bag formulation.
• Phthalates and plasticizers per CPSC-CH-C1001-09.4 and EN 14372 — GC-MS determination of the six restricted phthalates in flexible PVC and soft polymer components, ensuring compliance with children's product and food contact regulations.
• Heavy metals in packaging per EU Directive 94/62/EC — verification that the sum concentration of lead, cadmium, mercury, and hexavalent chromium in the plastic bag and its packaging is below the 100 ppm regulatory limit.
• Overall migration and specific migration for food contact per EU Regulation 10/2011 and FDA 21 CFR — the plastic bag is exposed to food simulants under the intended use conditions, and the total extractable mass and specific migrant levels are quantified to confirm safety for direct food contact.
• Polycyclic aromatic hydrocarbons per AfPS GS 2019:01 PAK — for carbon-black-pigmented or dark-colored plastic bags, 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 for environmentally conscious packaging.

Environmental Durability and Degradation Testing for Plastic Bags

• Accelerated weathering by xenon-arc exposure per ASTM G155 and ISO 4892-2 — the plastic bag film is subjected to simulated sunlight, heat, and moisture cycles, and the retained tensile strength, color change, and surface degradation are evaluated to predict outdoor storage life.
• UV resistance by fluorescent lamp exposure per ASTM G154 — isolating the ultraviolet degradation effect on the plastic bag material to verify UV stabilizer effectiveness and to detect yellowing and embrittlement.
• Low-temperature flexibility and cold crack resistance per ASTM D1790 and ISO 8570 — the bag is conditioned at sub-zero temperatures and flexed to ensure it remains pliable and does not crack during cold storage or winter transport.
• Resistance to oils, greases, and household chemicals per ISO 175 and ASTM D543 — the plastic bag surface is exposed to common kitchen and industrial fluids to verify no swelling, softening, or loss of mechanical integrity occurs.
• Biodegradation and compostability for biodegradable bags per ISO 14855-1 and ASTM D6400 — the biodegradable plastic bag is incubated under controlled composting conditions and the CO2 evolution is measured to verify the claimed degradation rate and compostability certification requirements.
• Recyclability and material identification per ISO 11469 — the plastic bag is analyzed by FTIR or DSC to confirm the polymer type and to support recycling stream classification and labeling.

Report Recognition and ISO/IEC 17025 Compliance

All test methods described in this plastic bag 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 retailers and brand owners referencing ASTM and ISTA standards, and by customs and regulatory authorities across the Middle East, Australia, and Asia. Whether you require a complete qualification dossier for a new plastic bag design, a batch release inspection for an export shipment, or a root cause failure analysis of a packaging defect, our laboratory provides the measurement accuracy and technical expertise that the global flexible packaging industry demands.