Processing Method and Performance Evaluation of Flame-Retardant Corrugated Sandwich Panel

Area of Science:

• Materials Science
• Polymer Chemistry
• Fire Safety Engineering

Background:

• Thermoplastic corrugated sheets have limitations in engineering applications due to flammability.
• Previous research indicated potential for flame retardant modifications.

Purpose of the Study:

• To develop flame-retardant thermoplastic corrugated sheets for expanded engineering use.
• To evaluate the impact of varying flame retardant concentrations on material properties and fire performance.

Main Methods:

• Flame-retardant prepreg tapes were prepared with 15%, 20%, and 25% flame retardant addition.
• Thermoplastic molding was used to create flame-retardant corrugated sandwich panels.
• Limiting oxygen index, vertical combustion, cone calorimetry, and mechanical tests were performed.

Main Results:

• A 25% flame retardant addition achieved a V0 fire safety rating.
• Compared to the control, flexural strength and modulus decreased by up to 19.9% and 21.9%, respectively.
• Total heat release and maximum heat release rate were reduced by up to 34.1% and 37.4% with increasing flame retardant content.

Conclusions:

• Flame-retardant thermoplastic corrugated sheets can achieve V0 rating with 25% additive.
• The addition of flame retardants effectively reduces fire hazards (heat release).
• There is a trade-off between flame retardancy and mechanical properties (strength and modulus).