Abstract: The article reported the analysis of the influence factors for the oxygen permeability of oxygen barrier pipes, and these factors include the ethylene content of ethylene-vinyl alcohol copolymer (EVOH), the wall thickness of oxygen barrier layer and the processing temperatures. The results indicated that the lower the ethylene content of EVOH, the better the oxygen barrier performance.There was a correlation between the wall thickness of oxygen barrier layer and EVOH brand. Generally,the thickness of barrier oxygen layer thickness was in the range of 0.08~0.10 mm. There was no significant influence observed from the processing temperature of EVOH layer on the oxygen barrier performance of the pipes.

Key words: oxygen barrier pipe, oxygen barrier performance, oxygen permeability, influence factor, ethylene-vinyl alcohol copolymer