What are the fire-retardant additives used in PVC outdoor benches?

PVC outdoor benches are popular for their durability and low maintenance, but ensuring fire safety is crucial. To enhance flame resistance, manufacturers incorporate specific fire-retardant additives into PVC materials. Common additives include:

1. Antimony Trioxide: Often combined with halogenated compounds to create a synergistic flame-retardant effect.

2. Aluminum Hydroxide (ATH): Releases water when heated, cooling the material and diluting flammable gases.

3. Phosphate Esters: Act as plasticizers while also providing flame resistance.

4. Chlorinated Paraffins: Halogen-based additives that inhibit flame spread.

5. Boron Compounds: Effective at high temperatures and environmentally friendly.

These additives help meet safety standards while maintaining the bench's structural integrity. Choosing the right combination depends on factors like cost, environmental impact, and performance requirements. Always verify compliance with local fire safety regulations when selecting PVC outdoor furniture.