I'm starting a new thread as the previous thread discussing this topic started out as a discussion of PE inflatables and soda bottle valves. The goal of this project is to make Cuben a viable material for use as a full size inflatable air mattress weighing in at 6 oz or less.
One thing that I realize about Cuben as a material is that while durable for it's weight it is still delicate and must be treated with care.
My current idea is to use 3M 9485PC tape as a bonding agent, and use a Thermarest repair valve attaching it with the hot bond agent supplied with it. If neccesary I will use SeamGrip or Aquaseal to backup and bonds.
I just made my initial prototype, here is a picture, I'm using a clothespin to seal off the one small hole I left in the seam to inflate. I'm using a standard soda straw to inflate this prototype.
I did make one gross error in judgement trying to use a potato chip bag clamp to clamp it shut, I did not notice that the clamp was serrated, and so it is causing leaks. I do need a strong little clamp to seal my second prototype.
After applying the tape I applied about 20 lbs of pressure across the mat deflated for approximately an hour. The bond is strong, and I believe the material would give way before the bond does even in peel.
I think the method of taping should be fairly important in this project, and I will discuss it in more length when I have it right.
I should add that I wouldn't consider using an air mattress made out of Cuben without a CCF foam pad or other ground protection underneath. A GG 1/8" pad should be included in the 6oz weight that is the goal of this project.
