Fire Retardant Laminated Tarpaulin

Reevoo Industry achieves flame retardancy for PVC laminated tarpaulin through formula design and process control, leveraging its PVC film + polyester base fabric laminated structure to deliver consistent flame performance (flame-retardant uniformity error ≤5% across the entire width).

Flammability of PVC laminated tarpaulin primarily stems from flammable plasticizers in the PVC film. Formula modification is the core solution:

2.1 Flame-Retardant System Addition for PVC Laminated Tarpaulin

Add flame-retardant systems: During PVC plasticization (150-170℃), Reevoo incorporates 15-25% inorganic flame retardants (aluminum hydroxide, magnesium hydroxide, particle size 1-5μm) and 5-10% organic flame retardants (WSFR-PCF, WSFR-9702), used singly or in combination (inorganic:organic = 3:1 for optimal effect).

2.2 Flame-Retardant Synergistic System for Enhanced Fire Resistance

Synergistic system: 3-5% antimony trioxide is used with 8-12% halogen-based flame retardants (brominated epoxy resin) to break combustion chains; inorganic flame retardants absorb heat (endothermic value ≥1200J/g) to lower material surface temperature below ignition point (≤250℃).

2.3 Flame-Retardant Particle Uniform Dispersion for Consistent Performance

Uniform dispersion: High-speed mixing (1500-2000rpm, 10-15min) and internal mixing (160-175℃, 5-8min) ensure even distribution of flame-retardant particles (verified by SEM test, particle dispersion uniformity ≥95%), ensuring consistent performance.

High-tenacity knitted polyester base fabric (1000D×1000D, tensile strength ≥2500N/5cm, tearing strength ≥500N/5cm) is impregnated with 8-12% flame retardants (phosphorus-nitrogen system) at 80-90℃ for 30-40min, allowing agents to penetrate fiber gaps (penetration depth ≥0.5mm) to resist combustion and inhibit flame spread (flame spread rate ≤5cm/min).

Strict temperature and pressure control is applied during high-temperature, high-pressure lamination (temperature: 140-155℃, pressure: 0.3-0.5MPa, speed: 2-5m/min):

4.1 Prevent Flame-Retardant Component Decomposition in Lamination

Prevent thermal decomposition of flame-retardant components (decomposition temperature ≥200℃) to preserve performance (flame-retardant retention rate ≥90% after lamination).

4.2 Ensure Firm Lamination to Avoid Flame Penetration

Ensure firm lamination between PVC film and base fabric (peeling strength ≥18N/cm), eliminating gaps (gap size ≤0.01mm) for flame penetration.

Reevoo PVC laminated tarpaulin meets international standards: NFPA 701 (US, Class I, flame spread ≤25cm in 10min), EN 13501 (EU, B-s1,d0, no dripping, smoke density SDR ≤30), and GB 8624-2012 (China, B1 grade, oxygen index ≥32%). Test report numbers: SGS-2024-001 (NFPA 701), TUV-2024-008 (EN 13501), CNAS-2024-015 (GB 8624). It achieves self-extinguishing (extinguishing time ≤3s after fire source removal), limited flame spread (≤10cm), and low smoke toxicity (toxicity index ≤50).

6. Scenario-Based Formula & Process Optimization for Flame-Retardant PVC Laminated Tarpaulin

Reevoo optimizes formulas and processes for different scenarios: offshore (high salt resistance, flame retardant + anti-corrosion formula), high-speed rail (low smoke, EN 13501 B-s1,d0), and construction (GB 8624 B1, weather resistance ≥5 years). This enables flame-retardant PVC laminated tarpaulin to retain lightweight (600-1200g/㎡), flexible (bending radius ≤5mm), and weldable (welding strength ≥80% of base material) properties while complying with safety requirements.