The following figures reflect the performance framework and parameter ranges provided in your source text, rewritten in a more standardized international style.
3.1 Impact protection and cushioning
For youth training, impact attenuation needs to be carefully balanced with stability.
Reference targets for youth use
- Shock absorption: 55%–65%
- Vertical deformation / cushioning deflection: 4–7 mm
- Fiber elongation at break: ≥35%
- Backing thickness: ≥2.0 mm
- Backing tensile strength: ≥18 MPa
- Peel strength: ≥2.8 N/mm
- Cushioning performance decay after 10,000 simulated loading cycles: ≤8%
Vivaturf youth-training configuration
- Shock absorption: 58%–62%
- Cushioning deflection: 5–6 mm
- Fiber linear density: 6,000–8,000 dtex
- Fiber breaking strength: ≥32 N per filament
- Elongation at break: ≥40%
- Three-layer ecological cushioning backing thickness: ≥2.5 mm
- Backing tensile strength: ≥20 MPa
- Tear strength: ≥30 N
- Peel strength: ≥3.0 N/mm
- Cushioning decay after 10,000 high-frequency loading cycles: ≤5%
These values are intended to give young players a softer and more forgiving landing response while still preserving enough support for stable movement and skill development.
3.2 Underfoot feel and movement suitability
Youth training surfaces need to be soft and supportive at the same time.
Reference targets
- Fiber length: 30–50 mm
- Fiber thickness: 0.25–0.30 mm
- Fiber density: 10,000–12,000 tufts/m²
- Surface friction coefficient: 0.70–0.80
- Rolling friction coefficient: 0.72–0.78
- Tuft pull-out resistance: ≥3.0 N/mm
- Fiber layover after 10,000 repeated loading cycles: ≤5%
- Surface feel consistency deviation: ≤0.5 mm
Vivaturf youth-training configuration
- Fiber length: 35–45 mm
- Fiber thickness: 0.28–0.30 mm
- Fiber density: 11,000–13,000 tufts/m²
- Three-dimensional spiral profiled fiber with micro-grooved surface
- Surface friction coefficient: 0.73–0.77
- Rolling friction coefficient: 0.74–0.76
- Fiber layover after 10,000 high-frequency loading cycles: ≤3%
This configuration is designed to feel more natural and forgiving underfoot while giving young players reliable support during passing, dribbling, turning, and shooting drills.
3.3 Durability and maintenance practicality
Youth football surfaces must tolerate high daily use without requiring excessive maintenance.
Reference targets
- Wear resistance: ≥10,000 cycles/m²
- UV color fastness: ≥ Grade 7
- Performance decay after 800 h UV aging: ≤5%
- Operating temperature range: −10°C to +60°C
- Water permeability: ≥6 L/(m²·min)
- Service life: ≥8 years
- Annual maintenance cost: ≤8 RMB/m²
Vivaturf youth-training configuration
- Wear resistance: ≥12,000 cycles/m²
- UV color fastness: ≥ Grade 7
- Performance decay after 1,000 h UV aging: ≤5%
- Operating temperature range: −15°C to +65°C
- Water permeability: ≥8 L/(m²·min)
- Heavy-rain drainage recovery: typically around 20 minutes under correctly designed drainage conditions
- Expected service life: 8–10 years
- Estimated annual maintenance cost: 5–7 RMB/m²
Compared with natural grass and many conventional infilled systems, this can significantly reduce maintenance complexity while keeping the field more consistently available for training.
3.4 Environmental and health indicators
Because youth players are especially sensitive to surface hygiene and air-quality-related concerns, environmental control is a major part of the system.
Reference targets
- Heavy metal content: ≤100 mg/kg
- lead ≤50 mg/kg
- cadmium ≤10 mg/kg
- Formaldehyde: ≤0.1 mg/L
- VOC release: ≤0.5 mg/m³ (24 h)
- No noticeable odor
- Environmentally oriented content share: ≥25%
Vivaturf youth-training configuration
- Composite formulation: PBAT + PLA + HDPE
- Environmentally oriented material share: ≥30%
- Heavy metal content: ≤80 mg/kg
- lead ≤40 mg/kg
- cadmium ≤8 mg/kg
- Formaldehyde: ≤0.08 mg/L
- VOC release: ≤0.4 mg/m³ (24 h)
- No noticeable odor under normal use conditions
- No need for pesticides, fertilizers, or irrigation during operation
These values support a cleaner and lower-emission training environment that is especially suitable for schools, academies, and youth sports centers.
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