I own a small startup tea bag company and I queried many sellers whether this would seal the non woven tea bags and they kept saying no as they thought the non woven filter was too thick. I finally scrambled on this and I decided to do some quick maths and take a gamble on this machine. I bought this to replace my hand sealer since my production level needed to rise. So far this has been the best decision ever. It seals perfectly, and does not cut through the bag if the right temperature is set. I might just get another one! This machine is perfect. Any questions feel free and I will answer