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ETFE film has a good durability, easy to clean and stability, is a typical non-woven film material, for the current international most advanced film materials. The national stadium is a 0.25 mm thick, colorless and transparent ETFE film with a printing point.

PTFE Chemical name PTFE, is a chemical inert material, is the glass fiber as the basis for the formation of PTFE membrane material. PTFE also has excellent durability, ease of cleaning and stability. The PTFE membrane material selected by the national stadium is based on the different position, which is the sound absorbing film material and the waterproof membrane of the inner ring surface of the ceiling area. After testing, the fire resistance of ETFE film and PTFE membrane material can reach B1 grade, difficult to burn material.

Compared to the ETFE membrane has higher transmittance and better chemical resistance than PTFE membrane, can resist the majority of acid and alkali; ETFE membrane anti-natural aging ability and good processability and mechanical, because the ETFE membrane is directly from the plastic film, no substrate, so its tensile strength, tear strength than PTFE film , and a high-one-time investment, high maintenance costs during use, and poor resistance to sharp objects.