GASTANK Sweden (Piteå, Sweden) announced on March 5 that it developed high-pressure compressed natural gas (CNG) cylinders for motor vehicles that feature zero permeation, are cost competitive with legacy materials and use material from DSM (Geleen, The Netherlands) and 3B (Battice, Belgium).
The inner liner is made with Akulon (polyamide 6) Fuel Lock from DSM and the HiPer-tex high-performance glass fiber from 3B. The zero permeation cylinders meet the stringent ECE R110 regulation governing the use of Type IV high-pressure CNG cylinders for motor vehicles.
Professor Kurt Berglund, president GASTANK Sweden AB, states: “The combination of both Akulon Fuel Lock and HiPer-tex glass fiber enables optimizing the cost-benefit ratio of Type IV cylinders. HiPer-tex high-performance fibers bridge the gap between heavyweight steel and high-cost carbon fiber composites due to its ability to deliver a comprehensive range of properties economically, whereas the newly developed cost effective Akulon Fuel Lock considerably reduces loss of gas through permeation.”
Berglund goes on to say: “Well-recognized independent consulting Powertech Labs Inc. Canada did not detect any loss of gas via permeation in our newly developed Gastank 32, CNG tank with 32-liter capacity. This unprecedented result makes our lightweight, zero permeation composite CNG tanks a benchmark within the composite cylinder manufacturing industry.”
Tim Vorage, application development manager at DSM, adds: ”Our newly developed cost effective Akulon Fuel Lock not only shows a permeation factor at least 150 times lower than high-density polyethelyne [HDPE], it also significantly limits creep under extreme temperatures at the cylinder’s neck thanks to a 50°C higher temperature resistance than HDPE. In addition, the ability to withstand higher temperatures allows a faster curing time of the composite material.”