The plastic you are talking about is actually PET, PE, OPP film and other materials. Self-adhesive materials, also known as self-adhesive materials, pressure-sensitive materials or sticky notes, are the basic materials for label printing. It is widely used in identification labels of industrial production, daily necessities, etc. Various PET films, PVC films, and PE films can be used as self-adhesive materials. The basic composition of self-adhesive printing materials. It is mainly composed of surface printing layer, adhesive layer and peeling layer.
(1) The strength of the surface material label is the key to bidding. Therefore, the surface material is required to have a certain strength and hardness. The stiffness of the label is related to the thickness of the material and the area of ??the label. Therefore, when using soft film materials, the thickness should be appropriately increased. Thin paper materials, such as price tag paper of 60 ~70g/m2, are generally not suitable for making large labels, but are suitable for processing into small labels, such as price tags used on price tag guns. Poor stiffness of the label will cause the label to not come out during labeling, or the label will be rewinded together with the backing paper, causing automatic labeling to fail.
(2) Release force, also called peeling force, is the force when the label is separated from the backing paper. The release force is related to the type and thickness of the adhesive and the silicone oil coating on the surface of the backing paper, as well as the ambient temperature during labeling. If the release force is too small, the label will easily separate from the bottom paper during transportation, that is, the label will fall off; if the release force is too large, it will be difficult for the label to separate from the bottom paper, and the label will not be released. Various technical indicators should be comprehensively controlled to keep the release force within a reasonable range.