Glassine release liners play a crucial role in the label industry, serving as the backing material for pressure-sensitive labels. These smooth, translucent papers are designed to protect the adhesive side of labels and facilitate easy release when the label is ready for application. Understanding the various specifications of glassine release liners is essential for label manufacturers and end-users alike. This article explores the common specifications of glassine release liners and their implications for label performance.
Thickness:
One of the primary specifications for glassine release liners is thickness. Common thicknesses range from 40 to 90 microns (approximately 1.6 to 3.5 mils). The most widely used thicknesses include:
- 50 microns (2 mils)
- 60 microns (2.4 mils)
- 70 microns (2.8 mils)
Thicker liners generally offer more stability and durability during the label production and application processes. However, thinner liners can be advantageous for reducing overall material costs and waste.
Basis Weight:
Basis weight, measured in grams per square meter (gsm), is another important specification. Common basis weights for glassine release liners include:
- 40 gsm
- 50 gsm
- 60 gsm
- 70 gsm
Higher basis weights typically correspond to thicker and more robust liners, while lower basis weights are preferred for applications where weight reduction is a priority.