Performance and Failure Mechanism of Fire Barriers in Full-Scale Chair Mock-ups

Area of Science:

• Materials Science
• Fire Safety Engineering
• Polymer Chemistry

Background:

• Residential upholstered furniture poses significant fire risks.
• Fire barriers are implemented to mitigate furniture flammability.
• Understanding fire barrier failure mechanisms is crucial for improving safety.

Purpose of the Study:

• To investigate the effectiveness of commercial fire barriers in upholstered furniture.
• To identify the failure mechanisms of fire barriers under realistic fire conditions.
• To evaluate the impact of fire barriers on the flammability of upholstered chairs.

Main Methods:

• Full-scale flaming tests were conducted on upholstered chair mock-ups.
• Six commercial fire barriers were tested with polyurethane foam and polyester fiber padding.
• Ignition was achieved using an 18 kW propane burner, simulating realistic fire scenarios.

Main Results:

• All tested fire barriers significantly reduced peak heat release rates (up to 64%).
• Fire barriers delayed the onset of peak heat release by up to 19 minutes.
• Failure was consistently triggered by the ignition of percolated liquid padding products beneath the barrier.

Conclusions:

• Fire barriers demonstrate effectiveness in reducing initial fire growth in upholstered furniture.
• The primary failure mechanism involves the ignition of molten or pyrolyzed padding materials that breach the barrier.
• Further research should focus on preventing liquid product percolation and ignition to enhance fire barrier performance.