Barcode Label Adhesives

An integral part of barcode labeling, barcode label adhesive is the substance or material applied to the back of a barcode label to attach it to the surface of a particular item. A barcode label adhesive should be of industrial grade and must have an apply temperature ranging from 40 °F to 250 °F.

Shear, tack, and peel are among the properties that are critical for barcode label adhesives. Shear represents the measurement of an adhesive's internal strength with which it attaches itself; shear is especially important on curved surfaces. Adhesives with a low shear fall off easily, while high-shear adhesives do not. Tack measures the ability of an adhesive to build an instantaneous bond with the surface on which it is applied. Peel determines the force required to remove a label.

Barcode labels are available in a variety of adhesive backings, and the application of adhesives depends upon the type of surface and quality of label material. The weight of the adhesive coat varies according to the application requirements. Barcode label adhesives are generally classified into two groups: permanent and removable barcode label adhesives. Most of the barcode applications employ permanent barcode label adhesives. A feature of this type of barcode label adhesive is that it has a strong adhesion to a range of surfaces including paper, plastic, and stainless steel. Permanent barcode label adhesives are generally used for applications where removal is not required or necessary.

Removable barcode label adhesives are used for barcode applications where the label is temporary. Common examples of removable barcode label are price tags affixed on costly consumer items. The apply temperature of removable barcode label adhesives starts at around 40°F, which is higher than that of the permanent barcode label adhesives. For particular applications, barcode label adhesives are further sub-divided into acrylic, acid-free, cold-temperature, high-temperature, pressure-sensitive, emulsion, food contact, silicone, solvent, rubber, and glove-friendly adhesives.

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