What are the structure and material properties of PE heat shrink film?

Shrink film is a film material with a surface protection function and is one of the most important products in pressure sensitive adhesives (PSA). Shrink film is usually based on a polyolefin plastic film with an acrylate polymer as the pressure sensitive adhesive base resin. The real meaning of shrink film is a temporary protective measure to prevent surface scratches during the storage, transportation and circulation of goods, or between substrate processing. Shrink film is widely used in the surface protection of aluminum panels, aluminum-plastic composite panels, mirror steel panels, color panels, plexiglass panels, decorative panels, aluminum profiles, plastic steel profies, stainless steel coils, marbles, and display panels. So what are the structure and material properties of PE shrink film?

Shrink film is a film material with a surface protection function and is one of the most important products in pressure sensitive adhesives (PSA). Shrink film is usually based on a polyolefin plastic film with an acrylate polymer as the pressure sensitive adhesive base resin. The real meaning of shrink film is a temporary protective measure to prevent surface scratches during the storage, transportation and circulation of goods, or between substrate processing. Shrink film is widely used in the surface protection of aluminum panels, aluminum-plastic composite panels, mirror steel panels, color panels, plexiglass panels, decorative panels, aluminum profiles, plastic steel profiles, stainless steel coils, marbles, and display panels. So what are the structure and material properties of PE shrink film?

Shrink film is generally polyacrylate protective film. The basic structure of polyacrylate protective film is: from top to bottom in order: isolation layer; printing layer; film; adhesive layer.

Next is the film, which is usually made of low-density high-density polyethylene (PE) and polyvinyl chloride (PVC). It can be obtained by extrusion, injection molding and blow molding. Since PE is cheaper and more environmentally friendly, 90% of film is made from polyethylene, mainly by blow molding process. There are many types of polyethylene with different melting points and densities.

The quality of shrink film depends critically on the properties of the colloid. There are two types of pressure-sensitive adhesives used in shrink films: solvent-based polyacrylate adhesives and water-soluble polyacrylate adhesives, which have different properties.