PVC self-adhesive labels represent a new direction in the printing industry, with increasing applications. They can be used for household items such as hair conditioner labels and advertising labels, as well as industrial purposes like battery labels, wire labels, tire labels, and warning labels. On the surface, the structure of PVC self-adhesive printing materials consists of the surface material, adhesive, and backing paper. However, personnel introduction states that to ensure quality, it also includes back printing and silicon coating, among other elements.
The surface coating of PVC sticker printing is actually a protective layer, designed to enhance the ink reception and ease of printing, while preventing dirt, increasing ink adhesion, and preventing the graphic from peeling off. The silicon coating involves applying a silicon oil layer on the base paper, making it a very smooth and low-surface-tension surface, which prevents the adhesive from sticking to the base paper.
The backing paper for PVC sticker printing is designed to protect the adhesive on the back of the face material, support the face material, and enable it for die-cutting, waste removal, and labeling on the applicator machine. As for the reverse printing, it serves to print the manufacturer's registered trademark or design on the back of the backing paper, acting as a promotional and anti-counterfeiting measure.
The face material is the surface that accepts printing graphics and the backside that accepts adhesive and is ultimately applied to the adhesive object. The purpose of applying the primer is to protect the face material and prevent the adhesive from渗透. It enhances the opacity of the fabric; increases the bonding strength between the adhesive and the face material; and prevents plastic face materials from allowing plasticizers to渗透 into the adhesive, affecting its adhesive properties and reducing the bonding strength of the label, leading to label detachment.
Next is the adhesive for PVC pressure-sensitive label printing. There are various formulations available, suitable for different substrates and applications. It serves as the bonding material between the pressure-sensitive label material and the base material, acting as a connector. It is also a crucial component in PVC pressure-sensitive label printing materials, a key aspect of label application technology.
