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.
In modern Western tradition, this is the side of the flag that is depicted when the hoist is to the observerâs right. In 18th and 19th century America there was no front or back. The devices, such as text and images, usually appear on only one of the two sides.