From UL94 classification to the Glow Wire Test and thermal indices: discover the standards that govern flame resistance in polymers and their impact on industrial applications.
If you're reading this article, you probably have one of two needs: to make your products flame-retardant but don't know where to start or which supplier to choose, or to understand which tests certify the flame resistance of plastic materials.
Polymers are widely used in appliances, automotive, and consumer electronics, and their fire behavior is a critical safety parameter. To assess their suitability, specific standards are applied—such as UL94, Glow Wire Test (GWT), and Relative Thermal Index (RTI).
Let’s explore how they work and why they are essential to your products.
UL94 is the leading standard for evaluating the flammability of plastic materials. Developed by Underwriters Laboratories (UL), it classifies polymers based on their flame resistance and ability to prevent fire spread.
Tests are performed on samples of various thicknesses, depending on the geometry of the certified part. Results are divided into four main categories:
This classification is critical for applications in electronics and electrical engineering.
In household appliances—often operating without supervision—flame safety is essential.
The Glow Wire Test simulates an electrical fault by assessing the reaction of plastic materials in contact with a heated metal wire.
Passing this test is often required for materials used in electric motors, switches, connectors, and high-voltage components.
At LATI, we design materials with outstanding flame-retardant performance. If you need a tailor-made polymer for your application, we're here to help.
Another key factor is thermal stability over time.
Thermal indices define the maximum temperature a plastic can withstand before significantly degrading in mechanical, electrical, or flame-retardant performance.
Now you know what lies behind the safety of flame-retardant materials. As seen, polymers used in high-risk sectors undergo stringent testing before market release.
At LATI, we specialize in flame-retardant compounds, including those based on recycled raw materials both mechanical and chemical. Our solutions ensure safety, compliance, and perfect adaptability to your product requirements.
Why not share your project with us? Contact us here for a personalized consultation with our materials experts.
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