The polyester/polyethylene backer is a weave. The polyester is surrounded polyethylene and creates a random weave that adds stability to the expanded PTFE layer above. My problem getting a clean cut stems from not being able to cut against a hard surface. I have to cut it against a soft foam...
I can't sandwich the laminate because after it's cut it's being held down to a liner via vacuum pressure and then welded on. The material being cut is PTFE laminated to a Polyethylene/Polyester backer. There's a .2" clearing from the PTFE cut to the liner surface which is also causing some...
Thanks for the reply. Would the speed of the cut have any effect? A hot knife is not plausible for the process unfortunately. I think I have to play around with the die cutting speed and angle as well as the tension in the strip of ePTFE, but haven't been successful as of yet.
-G
Hello,
So I'm having trouble cutting a thin (<1.5mm thick) sheet of expanded PTFE laminated to a polyester/polyethylene backer. The kicker is the sheet is half an inch wide and I'm tying to cut circles with a diameter of .4 inches. I'm using a cutting die, but am experiencing tearing of the...
