TPU Coated 70D Nylon Fabric for Medical Oxygen Bags

Our TPU Coated 70D Nylon Fabric is a precision-engineered composite material developed for demanding medical gas storage applications, particularly oxygen reservoir bags. The fabric utilizes a tightly woven 70D nylon base, chosen for its high tensile strength, excellent tear resistance, and, crucially, its low-stretch properties that prevent bag deformation under pressure. One side is precision-coated with a uniform, pinhole-free layer of medical-grade Thermoplastic Polyurethane (TPU), creating a robust, flexible, and completely airtight barrier. This barrier is essential for preventing oxygen permeation (loss) and moisture ingress, thereby maintaining gas concentration, purity, and bag functionality. The combination results in an extremely lightweight yet durable material ideal for constructing the collapsible reservoir bags used in manual resuscitators (e.g., Ambu bags), anesthesia circuits, and other oxygen delivery systems. It is designed to withstand thousands of compression cycles, frequent cleaning/disinfection, and the mechanical stresses of field and clinical use.

Key Features & Benefits

• Superior Gas Barrier & Airtightness:​ The continuous medical-grade TPU coating provides an excellent barrier against oxygen and moisture, minimizing gas loss and preventing contamination to ensure reliable oxygen delivery and concentration.
• High Strength-to-Weight Ratio:​ Offers exceptional durability and puncture resistance while contributing to a lightweight bag assembly, reducing operator fatigue and improving portability in emergency situations.
• Excellent Flexibility & Collapsibility:​ Remains highly flexible and pliable, allowing the reservoir bag to be easily and completely compressed for ventilation and to refill quickly without permanent creasing or fatigue.
• Low Gas Permeability:​ Specifically formulated to have very low oxygen transmission rates, ensuring efficient oxygen storage and conservation within the system.
• Chemical & Disinfectant Resistant:​ The TPU coating resists degradation from ozone (present in medical oxygen), cleaning agents, and common hospital disinfectants (e.g., alcohols, quaternary ammonium compounds), supporting effective reprocessing.
• Durable & Long-Lasting:​ The robust 70D nylon substrate provides high resistance to abrasion, tearing, and repeated flexing, ensuring a long operational lifespan even with frequent use.
• Strong, Reliable Seals:​ Excellent high-frequency (HF) weldability allows for the creation of strong, airtight, and durable seams that are critical for bag integrity and patient safety.