PRODUCTS

Pre-Oxidized Polyimide Scuba

Colour: carbon black + yellow 

Weight  : 380±5%; Width: 170-180 cm; length (thickness ) : 2.0mm

Material: Pre-oxidized  + polyimide 

Residual inflammation time: 0S; Residual  time: 0S; Carbonization length: <2mm; Heat shrinkage rate: 3%

Melting and dripping: no melting, no dripping phenomenon/melting , dripping phenomenon 

Limiting acid index (LOI value) : >42% Breakthrough strength :640N

Pre-Oxidized and Polyimide: Flame Retardant Properties 1. Introduction to Polyimide (PI) Polyimide (PI) is a high-performance polymer known for its exceptional thermal stability, chemical resistance, and mechanical strength. It is widely used in aerospace, electronics, and fire-resistant applications due to its inherent flame retardancy. Key properties of standard polyimide: - High thermal stability (up to 400–500°C in inert atmospheres). - Low flammability(Limiting Oxygen Index, LOI ~40–50). - Self-extinguishing (does not sustain combustion easily). 2. Concept of Pre-Oxidized Polyimide pre-oxidized polyimide is enhance its flame resistance and thermal stability. 3. Flame Retardant Mechanisms Pre-oxidation may enhance PI’s flame resistance through: - Formation of a protective char layer (barrier effect against heat and oxygen). - Increased cross-linking (reduces volatile gas release during combustion). - Improved thermal stability(delays decomposition at high temperatures). - Reduced flammability(self-extinguishing behavior). - Enhanced thermal resistance (stable up to 600°C).