Product Overview

This optical‑grade high‑clarity TPU film is specially engineered as the flexible viewing window material for soft‑shell hyperbaric oxygen chambers. Made from medical‑safe polyether‑based thermoplastic polyurethane, it balances outstanding light transmission, pressure resistance, high elasticity and air‑tight performance. Under cyclic pressurization up to 1.3–1.5 ATA, the window remains flat and distortion‑free for clear internal observation, relieving claustrophobia for users inside the hyperbaric cabin.

Core Advantages

1. Premium Optical Performance Ultra‑high luminous transmittance ≥93%, ultra‑low haze, gel‑free surface without crystal spots. No visual distortion when the chamber is inflated under working pressure, enabling real‑time visual monitoring. Anti‑yellowing & UV‑stabilized formulation prevents transparency degradation over long‑term use.
2. High Mechanical & Pressure Resistance Excellent tensile strength (≥25 MPa), elongation at break 400%‑800% and strong tear resistance. It bears repeated inflation‑deflation cycles without cracking, bulging or permanent deformation, meeting the safety requirement of soft hyperbaric cabins under rated operating pressure.
3. Medical‑Safe & Eco‑Friendly Non‑toxic, odorless, compliant with REACH & RoHS standards. Free of harmful plasticizers compared with PVC materials. The polyether TPU matrix offers great hydrolysis resistance for long service life in humid oxygen‑rich environments.
4. Excellent Processability Supports high‑frequency thermal welding for seamless air‑tight assembly with chamber fabrics. Customizable thickness (0.10–0.5 mm) and width according to window dimension requirements. Maintains stable flexibility from ‑40 °C to 80 °C without brittleness at low temperatures.
5. Durable Surface Property Scratch‑resistant smooth glossy surface, easy to clean and disinfect for routine medical hygiene maintenance.

6. Item	Specification
   Base Material	Medical‑grade Polyether TPU
   Light Transmittance	≥93%
   Hardness	85A‑90A Shore A
   Thickness	0.30 ~6.0 mm (customized)
   Tensile Strength	≥25 MPa
   Elongation at Break	400%‑800%
   Working Pressure	Adaptable for 1.3‑1.5 ATA soft hyperbaric chambers
   Operating Temperature	‑40 ℃ ~ +80 ℃
   Compliance	RoHS, REACH, non‑toxic medical safety

7. Application

   Flexible transparent viewing window for portable / household / clinical soft hyperbaric oxygen chambers, used for visual observation inside the cabin during hyperbaric therapy.