How to Choose Glassine Basis Weight for Release Liners
Article Content
What Basis Weight Changes
As basis weight changes, the liner's stiffness, caliper, roll weight, yield per tonne and handling behavior also change. These properties can affect coating, slitting, die-cutting, dispensing and final product feel.
Lighter Glassine Grades
Lighter grades can improve material yield and reduce roll weight, but may provide less stiffness and can be more sensitive to tension, curl or demanding die-cut conditions.
Medium-Weight Grades
Medium grades are widely useful where a balance of stiffness, converting stability and economics is required.
Heavier Glassine Grades
Heavier grades can provide additional stiffness and handling robustness, but increase material consumption and roll weight. They should be selected for a process need rather than simply as a quality upgrade.
Die-Cutting Considerations
The liner must support accurate cutting without excessive penetration, tearing or web instability. Die geometry, adhesive thickness and machine settings are as important as paper basis weight.
How to Specify
Define basis weight together with width, release side, release-force method, color, silicone configuration, roll length, winding requirements and application.
FAQ
Q: Is higher gsm always better?
A: No. Higher basis weight adds stiffness and mass but may not improve the actual application.
Q: Can two papers with the same gsm behave differently?
A: Yes. Calendering, density, moisture, furnish and surface treatment can influence stiffness and converting behavior.
Q: Should gsm be chosen before release force?
A: They should be considered together as part of the complete liner construction and application.
Technical Note
Release-liner performance is application-specific. Values and material choices should be confirmed using an agreed test method and, where possible, the customer's actual adhesive and converting conditions.
