What is a Barrier Tube? Reasons for the Need for Tubes with Excellent Oxygen Barrier

If the oxygen barrier or water vapor barrier is low for the ink supply tube, oxygen and water vapor in the atmosphere permeate into the ink.

This leads to the clogging of print head or ink discharge defect due to the generation of air bubble.
Also, if the low oxygen barrier or water vapor barrier tube is used, solvent components of the ink inside the tube will evaporate, changing the ink quality. Printing quality badly affects.

This HAKKO five-layer product includes the barrier resin (middle layer), keeping the oxygen less likely to be permeated.


  1. The material of the middle layer and outer layer is inferior in chemical resistance to the inner layer. Please do not allow chemicals to adhere to the tube during immersion or fitting insertion, which might cause swelling and cracking of the tube.
  2. When using the metal fittings, do not use any scratches or rusty fittings on the nipple surface. Damage to the inside of the tube may cause tube rupture or leakage. Also, do not use resin fittings with scratches on the surface of nipples. Depending on the state of the junction (parting line) of the resin joint, fluid may leak. Please confirm the matching between E-BTF-BK tubing and the fittings. If you need our technical support in fittings, please fill out this form.
  3. Due to the laminated structure tubing, please use the joints to seal an inner surface of the tubing.
  4. Please do not use the joints to seal an outer surface of the tubing. This may result in the bursting or coming off from the tubing.
  5. When you use our products, please refer to "Precautions for Use."
  6. In terms of chemical resistance, please refer to "Chemical Resistance Data."