Below are the technical indicators and reference values you provided, formatted in EU/NA-style terminology and units.
3.1 Match-play interaction (ball + player)
- Ball rebound ratio (FIFA Basic reference window in your text):0.75–0.85
- Vivaturf reference: 0.78–0.83
- Long-term intent: keep rebound behavior close to natural-grass expectations with minimal drift.
- Rolling friction coefficient (reference):0.45–0.55
- Vivaturf reference: 0.48–0.52
- Ball roll distance deviation: ≤2.5% (reference in your text)
- Slide/traction behavior (sliding resistance reference):0.42–0.58
- Vivaturf reference: 0.45–0.55
- Design intent: support quick stops/turns while maintaining controlled slide characteristics for football actions.
3.2 Safety and athlete load management
- Shock absorption (Force Reduction):
- FIFA Pro reference in your text: 55%–65%
- Domestic professional reference: 52%–68%
- Vivaturf reference: 58%–63% (with low variance emphasis)
- Vertical deformation (reference in your text):2.5–3.8 mm
- Vivaturf reference: 2.8–3.5 mm
3.3 Weathering + hygiene stability
- Temperature tolerance: −30°C to +85°C
- UV aging: 2,000 h, colour fastness ≥ Grade 7.5, colour difference ≤ 1.5
- Mold resistance: ASTM G21 rating 0
These targets are intended to reduce the risk of performance drift from UV embrittlement, color degradation, and humidity-related issues.
3.4 Wear and structural integrity for dense calendars
- Fiber linear density: 14,000–15,000 dtex
- Tuft density: 19,000–20,000 tufts/m²
- Single-yarn tensile breaking force: ≥150 N
- Elongation at break: 45%–60%
- Tear resistance: ≥32 N/mm
- Lisport XL wear test: ≤2.5% fiber breakage after 30,000 cycles
- Backing bonding strength: ≥2.8 MPa
- Seam strength: ≥2,000 N / 50 mm
3.5 Drainage for match continuity
- Permeability: ≥12 L/(m²·min)
- Backing perforation density: ≥30 perforations/m²
Design intent: reduce downtime after rain events when base drainage is correctly specified and installed.
3.6 Environmental and user exposure indicators
- TVOC emission rate: ≤0.18 mg/(m²·h)
- Formaldehyde: not detected
- Heavy metal migration: ≤0.2 mg/kg
- Antibacterial rate: ≥99.5%
- Stain adhesion rate: ≤4%
These metrics support low-odor, low-emission expectations in high-occupancy sports environments, consistent with sustainability-led procurement trends.
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