HDPE bag sealing tape is made of HDPE liner ,Oiled based glue ,water based glue,and pet liner.
So the different point it is on the liner BOPP or HDPE .
What’s the BOPP ?
BOPP is a popular label material made of plastic. It stands for Biaxially-Oriented (BO) Polypropylene (PP). Biaxially-oriented refers to the production process that stretches the film over two directions, making it stronger and more transparent.
What’s the HDPE?
High-density polyethylene (HDPE) or polyethylene high-density (PEHD) is a thermoplastic polymer produced from the monomer ethylene.
When the factory produce the BOPP (HDPE)bag with self-adhesive tape ,they need to use the hot knife to cut bag and the tape ,if bag and the liner of tape are same material , they will stick t