Hot Melts Hold Fast
Understanding the variables involved in pressure-sensitive label construction can help optimize labeling operations and reduce costs.
a) High-dose UV cure (approximately 800 W/cm at 200 m/min.),
b) Low-dose UV cure (approximately 120 W/cm at 200 m/min.), and
c) Curing under extremely high residual oxygen content of 240 ppm.
Even small uncoated areas can contribute to unwanted increases in release forces as the PSA penetrates pinholes and grabs onto the liner material. Filmic substrates are easier to coat with perfect coverage than paper, so 30 micron biaxially-oriented polypropylene (BOPP) was selected as the release liner material.
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