What Makes a Good Base Paper for Silicone Coating?

Base paper isn’t just a carrier—it’s a co-reactant in the silicone system.
A good base paper controls release force, curl, anchoring, and dimensional change over time. And yet, many buyers treat it as a commodity input.

That’s a costly mistake!

The right base paper must offer:
– High surface uniformity for even silicone laydown
– Good dimensional stability under oven heat and corona exposure
– Low porosity to reduce silicone penetration
– Sufficient stiffness for web handling—but not so much that it cracks under tension

Even fiber blend matters. Papers with high short fiber content often suffer from internal bonding failure at high coat speeds, especially under tension peaks at splicing or rewind.

The problem isn’t always in your silicone. Sometimes it’s in your sheet!

Coating chemistry and base paper must be engineered together. Not just selected in parallel.