Tech

ALLEN AUSTRALIA USES THE AMAZING AND PROVEN DROP STITCH TECHNOLOGY TO PRODUCE EASILY TRANSPORTABLE HIGH-PERFORMANCE INFLATABLE STAND UP PADDLE BOARDS.

ALLEN AUSTRALIA HAS INNOVATIVE TECHNOLOGY: BETTER HANDLE OF PADDLES, EASY PLANNING ON WINDSUPPING THANKS TO TO RAILS, BUT MORE ON THAT LATTER, STAY TUNNED FOR NEWS

What is drop stitch ?

Drop Stitch is a pretty amazing material we’re using to build Freedom Paddle SUP Boards entire range. Other uses for the technology have been floating docks, high-pressure rescue lifting bags and airplane wings! This material lets us build inflatables with flat surfaces that can be inflated to rock-hard rigidity. With this technology, you get hard-shell performance along with the easy transportation and storage of an inflatable. What makes this possible? Tens of thousands of fine threads.

The process starts by joining two pieces of polyester woven support fabric with thousands of fine polyester thread lengths. This base material is made in strips from five to ten feet in width, and up to 400 needle heads may be used in the setup. Each needle sews a continuous, evenly spaced thread, back and forth between the two pieces of woven fabric, locking them together into an incredibly strong unit. These drop-stitch sewing machines are marvels of complexity. When a change is made in the spacing distance between the two pieces of woven fabric, it can take over 20 days to remove and replace the required needles.

 

Drop stitch progression

Steve Allen, world title windsurfer and Surfboard shaper brother Marty Allen used their high tech experience with board manufacturing to involve extra layers of PVC laminated on, and the tension between these layers pulls ‘rocker’ (The upward facing parts of a board) into the profile, which needs to be done extremely accurately. The rails (the sides) are carefully overlapped and layered, with further material and taping applied to the rails to give extra strength.

Allen Australia SUPs can be inflated to an impressive 25psi thanks to the use of higher grades of dropstitch and multi-layer skins in manufacturing.

The dropstitch material is not air-tight, so an outer layer of PVC must then be glued or laminated onto the top and bottom of the dropstitch material. The more air inside, the more rigid the board will be, but once you get above 25 PSI you won’t see much difference. The difference between a board at 10psi and one at 20psi is dramatic.

How proper inflation is achieved

Allen Australia SUPs are inflated using a specialized dual action hand pump. Although air pressure is not the only factor in the rigidity of your board, it is important and you want to make sure your board has the right air pressure so that it is able to support your weight and perform as it should. Because of the higher pressures needed with an inflatable SUP specialized Halkey Roberts valves are used. These valves can hold much higher pressures compared to Boston valves, They are also user replaceable and serviceable. They require a specific type of valve adapter for the pump that fits the Halkey Robers, or H-Valve securely. A mechanical sealing system is used to insure that the board will stay inflated. ISUPs are very easy to inflate as the adaptor depresses the pin and allows air in but not out. Deflating a Halkey equipped board is even easier, just twist the pin and push down allowing all the air to escape. Then by rolling up the SUP towards the valve you’ll find that it compresses back to a very compact size.

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