The Second Layer: “Intelligent Crushing” of Backing Composite Materials   

The backing of synthetic turf is a composite of polypropylene woven fabric and polyurethane coating, traditionally considered the most difficult part to recycle. However, multi-layer separation technology is now changing the game for artificial turf recycling.  

Physical-Chemical Synergistic Separation System:  

1. Low-Temperature Embrittlement Separation  

   – Polyurethane coating becomes brittle at -35°C  

   – High-frequency vibration separates the coating from the woven fabric  

   – Separation purity reaches 95%  

2. Solvent-Based Selective Recovery  

   – Supercritical CO₂ extraction of polyurethane  

   – Solvent recovery rate of 99.8%  

   – High-purity polyurethane raw materials obtained  

Recycled Application Innovations:  

“Urban Sponge” Permeable Bricks:  

Mixing crushed synthetic turf backing materials (particle size: 2-5mm) with cement to produce permeable bricks with the following properties:  

– Permeability coefficient: 3.5×10⁻² cm/s (twice the national standard)  

– Compressive strength: 35 MPa  

– Water retention capacity: 12 liters per square meter of bricks  

Sports Safety Padding:  

Finely crushed synthetic turf backing materials, after surface activation treatment, are used as filler for cushioning layers:  

– Impact absorption: 65-70%  

– Service life: Over 8 years  

– Cost reduction of 40% compared to new EVA materials