Competitors PTFE and ‘Teflon’ FEP or PFA lined hose designs which are smooth bore, and have a silicone or rubber cover, include the use of a glue to bond the outside of the PTFE tube liner to the outer layers of the hose.

For most hose designs, this is necessary to prevent the tube from collapsing when the hose is subjected to vacuum, or kinking when flexed.

The theory is that this glue, which contains highly reactive and non-FDA approved chemicals, will never come into contact with the fluid media passing through the hose. The problem is that in practise this can sometimes happen.

In one example, it is known that electro-static discharges can occur which create tiny pinholes in the fluoroplastic hose liner. Although these pinholes do not show as leaks, they do allow the glue to be leached in to contaminate the process fluid.

Bioflex hose was designed to be vacuum proof and kink resistant without the need to use any glue in its construction. The patented design of the PTFE liner tube makes this possible.

The result is that Bioflex is the only smoothbore, rubber covered PTFE hose design which is free from any possibility of glue contamination.

Bioflex hose - better by design.