Limiting Oxygen Index Testing (LOI) Service
Limiting Oxygen Index Testing (LOI) is a critical analytical method used to assess the flammability of materials, particularly polymers and plastics. This test determines the minimum concentration of oxygen required in a mixture with nitrogen to sustain combustion, providing a quantitative measure of a material's resistance to fire. The LOI value is expressed as a percentage, with higher values indicating greater fire resistance.
The LOI test is based on the principle that the combustion of a material is dependent on the availability of oxygen. By gradually adjusting the oxygen concentration in the test atmosphere, the minimum level required to support sustained combustion can be identified. This critical oxygen concentration is the Limiting Oxygen Index, which serves as a quantitative measure of the material's resistance to ignition and burning.
The test is typically performed by vertically mounting a sample and exposing it to a controlled mixture of oxygen and nitrogen. The oxygen concentration is gradually decreased until the point where the sample can no longer sustain combustion. This oxygen concentration is then recorded as the LOI value, which is expressed as a percentage of the total volume.
At CD BioSciences, we provide a specialized LOI testing service customized for clients aiming to assess the flammability of their materials. Our service is meticulously crafted to deliver precise, dependable, and expedient analysis, aiding in the advancement and validation of sustainable materials.
For accurate LOI testing, the following sample requirements and types are essential:
Block Samples
Typically, 15 parallel samples are required, with dimensions refers to the ISO standards such as 80 mm × 10 mm × 4 mm.
Textile Samples
150 x 58 mm samples are used for textiles, considering both the warp and weft directions.
Liquid and Powder Samples
These are not accepted for LOI testing due to the nature of the test method.
Our LOI testing service employs state-of-the-art equipment and methodologies to ensure precision and accuracy in the determination of the LOI value.
We understand that each project has unique requirements, and we offer customizable LOI testing services to meet specific needs, whether it's for research, development, or quality control.
If you are interested in our services, please contact us for more information.
Our products and services are for research use only and cannot be used for any clinical purposes.
