There are two ways to use process heat shrinkable film labels

There are two ways to use process heat shrinkable film labels. Release time: 2018-11-29 　　 There are two ways to use process heat shrinkable film labels: full-body　shrink　sleeves and roll-fed . A common feature of these two methods is that a plastic film with an average thickness of 50 microns is first wrapped around a bottle and then heated. The heat generated causes the film to shrink along the contour of the bottle. The sleeve label shrinkage method is a more commonly used process, and the roll label method is under rapid development. The extrusion process of the overall sleeve label shrink film usually contains a transverse orientation process. After the film is printed, it is made into a cylindrical label, and then the processing machine cuts the cylindrical label into sleeves with a certain length, then puts the bottle inside the sleeve, and then lets the bottle and sleeve pass through a steam or Infrared light is the drying tunnel of the heating medium, and the heat causes the sleeve label to shrink and produce the label tightly attached to the bottle. The typical shrinkage of the film ranges from 50% to 80%. Bottles with irregular geometric shapes are suitable for the sleeve labeling system with high shrinkage. The most commonly used resin materials for sleeve label shrink films are PVC, ethylene glycol modified polyester (PETG) and oriented polystyrene (OPS). The rolling label process first requires a pre-printed film. Through the pick-up process and the bonding support of hot melt adhesive, the film material is wrapped around the bottle body to form a closed structure, and then the covered bottle body is sent to a hot drying The heat in the drying tunnel causes the film to shrink tightly to the surface of the bottle. Biaxially oriented polypropylene' (OPP) is the most commonly used resin material for roll labeling systems. Because OPP heat shrinkable film has an orientation effect on the machine, the final shrinkage rate of the rolling label method is smaller than that of the sleeve label method, in the range of 5%-20%. Commonly used bottle materials are PET, PP, HDPE or glass. Rolling labeling method is generally suitable for bottle structure with low shrinkage rate and less complicated structure. Previous: Method to improve the sealing strength of shrink film