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.
Chances are you've seen the American flag painted on the sides of homes, barns, and garages. But did you know there were rules about the practice? The United States Flag Code, which became official on June 22, 1942, describes the proper guidelines for displaying the flagâeven painted ones. The code states that any shape or design that uses red, white, and blue as well as stars and stripes is protected by the code.