From what I understand, the durability between the two is quite different. The PTFE membranes are used for the filtration of organic solvents where as the PVDF membranes are generally for low protein binding. Furthermore the PTFE membranes typically require a polyethylene support.
When the U.S. and Washington State flags are flown from a cross staff, the U.S. flag flies from the peak and the Washington State flag occupies the position on the right end of the cross staff (the observer's left). Additional Information on Display US Flags.
I've heard respected people suggest the flag goes on the right from the audience perspective, unless it's on a speaker's platform (then it clearly goes on the speaker's right - audience left). Which side does the US flag belong on when displayed from the floor? Mar 3, 2008. #1.