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JYL · 09-23-14, 06:15 PM

I try a few time to build such a material. For me, the main problem was to find a material that did not collapse under extreme vacuum... and one that will not outgaz over time as most plastic did.

I think the best I have tried was chicken feather but I don't remember if they were "Cook or carbonized".

Regarding keeping the vacuum for 20 years or so. I did not even bother. I just run the vacuum pump every week. ( I was even thinking that was an acceptable solution for a whole house insulation since a pump cost less then 200$).

The information about Vacuum bagging of model air plane might be interesting... but this process is to glue/laminate material. They don't even need to be 100% airtight since the pump is kept running the entire gluing period. In many case, we might use tick Polyethylene sheet to perform the procedure. These are not 100% airtight.

09-23-14, 06:15 PM	#19
JYL Heat recoverer Join Date: May 2011 Location: Quebec, Canada Posts: 17 Thanks: 0 Thanked 2 Times in 2 Posts	I try a few time to build such a material. For me, the main problem was to find a material that did not collapse under extreme vacuum... and one that will not outgaz over time as most plastic did. I think the best I have tried was chicken feather but I don't remember if they were "Cook or carbonized". Regarding keeping the vacuum for 20 years or so. I did not even bother. I just run the vacuum pump every week. ( I was even thinking that was an acceptable solution for a whole house insulation since a pump cost less then 200$). The information about Vacuum bagging of model air plane might be interesting... but this process is to glue/laminate material. They don't even need to be 100% airtight since the pump is kept running the entire gluing period. In many case, we might use tick Polyethylene sheet to perform the procedure. These are not 100% airtight.