PVC self-adhesive labels represent a new trend in the printing industry, with increasing application. They can be used for household items such as hair care product labels, advertising labels, and also for 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, as personnel explain, 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 printing ease, achieving the purpose of preventing dirt, increasing ink adhesion, and preventing the detachment of printed images. The silicone coating involves applying a silicone oil layer on the base paper, which turns the surface into a very smooth and low-surface-tension one, serving to prevent the adhesive from sticking to the base paper.
The backing paper for PVC self-adhesive printing is designed to protect the adhesive on the back of the face material, support the face material, and enable it to undergo die-cutting, waste removal, and labeling on the labeling machine. As for the reverse printing, its purpose is to print the manufacturer's registered trademark or pattern on the back of the backing paper, serving as a form of promotion and anti-counterfeiting.
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' plasticizers from渗透 into the adhesive, affecting its adhesive properties and reducing the label's bonding strength, leading to label detachment.
Next is the adhesive for PVC self-adhesive label printing. There are various formulations available, suitable for different substrates and occasions. It serves as the bonding material between the self-adhesive label material and the base material, acting as a connector. It is also a key component in the PVC self-adhesive printing material and a crucial aspect of label application technology.
