Permanent sealing tape is made from PEPA film,hot melt glue, PET, acrylic glue. It is used in PE material courier bag/mailing bag/postal bag. The strip can only use one time,once open, destroy bags.
12mm, 15mm, 18mm film width are regular sizes.Below is tips to choose
HC12mm is used for bag material under 35micron/layer.
HC15mm is used for thickness 35–60micron/layer.
HC18mm is used for over 60micron/layer material.
Besides,sticky is difference if bag with printing , samples are free for test.