... gloss 4.more popular in palstic packaging POF Polyolefin shrink film bags are environment friendly of three layer co-extrusion, which ... The welding and sealing range is also wide. 4. Airproof wrapping, dust and damp resistance. 5. Fine thermal sealing and easy ... wrapping. Its fine thermal sealing property makes it easy for operation, without occurrence of film break, and applicable ...