Self-adhesive labels consist of a face layer, the outermost layer that directly carries text, images, or barcodes. The face layer can be made of paper, plastic film, or synthetic materials. Different materials offer varying degrees of water resistance, abrasion resistance, and printability to meet diverse usage environments and information transmission needs.
The adhesive layer, also known as the bonding agent layer, is crucial for the self-adhesive label to adhere to the surface of an object. Commonly used adhesives include pressure-sensitive adhesives, hot melt adhesives, or solvent-based adhesives, each exhibiting different adhesion strengths and removability under varying conditions. The performance of the adhesive layer directly affects the label's adhesion and lifespan.
The backing paper, also known as the release liner, is located behind the adhesive layer and serves to protect the adhesive surface and facilitate storage and handling. The backing paper is typically made of silicone-coated paper or film to prevent the labels from sticking together before use and to facilitate easy peeling during application.
