Overview
ISO 9773:1998/Amd 1:2003 is an important international standard developed by the International Organization for Standardization (ISO) focused on plastics' fire performance. Specifically, it describes an amendment concerning the burning behaviour determination of thin, flexible vertical plastic specimens when exposed to a small-flame ignition source. This amendment refines the testing specimens' characteristics to ensure consistent and reliable fire behaviour evaluation.
This standard is critical for manufacturers, researchers, and safety regulators concerned with the flammability and fire safety of plastic materials under small flame exposure, offering guidance that supports compliance with fire safety regulations and aids in material selection.
Key Topics
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Specimen Preparation and Dimensions
The amendment defines precise dimensions for test specimens: a length of 200 mm ± 5 mm, width of 50 mm ± 2 mm, and a maximum thickness of 0.25 mm. Specimens must be accurately measured and free of surface dust or particles after cutting.
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Material Variability and Test Representativity
Different material properties (density, hot melt fluidity, pigment content, additives, anisotropy direction) impact fire behaviour. The standard mandates testing specimens across the entire material property range to ensure representative fire test results.
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Specimen Configuration
Specimens are to be rolled longitudinally around a mandrel to form a cylinder with a marked line 125 mm from the lower edge as a reference. Overlapping sections are secured with adhesive tape or, for rigid specimens, with nichrome wire to maintain consistent shape during testing.
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Pigment and Additive Considerations
Special attention is given to specimen pigmentation. Specimens must include those with no colorant, highest organic and inorganic pigment loadings, and pigments known to influence flammability to accurately capture the material's fire response.
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Referenced Standards Update
The amendment updates normative references, replacing ISO 1210 with IEC 60695-11-10:1999 and updating related standards to reflect current best practices in fire testing protocols.
Applications
ISO 9773:1998/Amd 1:2003 primarily serves industries relying on plastic materials where fire safety is a critical concern, including:
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Material Development and Quality Control
Manufacturers of flexible plastic films and components use this standard to evaluate and optimize materials for improved fire performance.
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Fire Safety Testing Laboratories
Ensures consistent specimen preparation and testing approaches, allowing laboratories worldwide to produce comparable and reproducible results.
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Regulatory Compliance
Assists in meeting national and international fire safety regulations by providing a validated method for assessing flame ignition and burning behaviour of thin flexible plastics.
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Product Certification
Supports certification processes that require documented proof of fire resistance or controlled burning characteristics in flexible plastic products.
Related Standards
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IEC 60695-11-10:1999 – Electric cables and components – Fire hazard testing with small flame source (reference method for flame application).
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ISO 1043-1:2001 – Plastics – Symbols and abbreviations for plastic types and additives.
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ASTM D 5207-98 – Standard test methods for flammability of plastic materials for parts in devices and appliances using small-flame apparatus.
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ISO 10093:1998 – Plastics – Methods for conditioning specimens prior to testing.
This standard amendment ensures that the testing of thin flexible plastic specimens for flame exposure is methodical and representative of real-world material variations. It enhances the reliability of fire behaviour assessments, adds clarity to specimen preparation, and maintains alignment with current fire safety test methodologies. By following this standard, stakeholders can better predict the fire risks associated with flexible plastic materials and improve fire safety across multiple industries.
Keywords: ISO 9773 amendment, plastics burning behaviour, thin flexible specimens, small-flame ignition, fire testing plastics, specimen preparation ISO 9773, plastic flammability test, fire safety standards plastics, ISO plastics fire behaviour.
Open preview (PDF)Plastics — Determination of burning behaviour of thin flexible vertical specimens in contact with a small-flame ignition source — Amendment 1: Specimens
