PPO is a registered trademark of SABIC Innovative Plastics B.V. under which various polyphenylene ether resins are sold.

PPE blends are used for structural parts, electronics, household and automotive items that depend on high heat resistance, dimensional stability and accuracy.

[4] The PPO is spun into a hollow fiber membrane with a porous support layer and a very thin outer skin.

The permeation of oxygen occurs from inside to out across the thin outer skin with an extremely high flux.

Due to the manufacturing process, the fiber has excellent dimensional stability and strength.