Release Agents
Definition
A coating applied to prevent adhesive self-sticking.
Historical Background
1950s: silicone release agents replaced talcum powder, achieving perfect adhesion-release balance.
Example
Release paper on double-sided tape prevents both sides sticking together. Like a protective umbrella for adhesive.
Formula
Release Force = f(Silicone Type, Coating Weight, Degree of Curing)
Core Concepts
Selective isolation: isolating adhesive without affecting substrate. Surface energy controlled at 20-25 mN/m.
Extended Applications
High (8-12 g/25mm): easy application; low (1-3): die-cutting; ultra-low (<1): precision electronics; fluorinated: acrylic adhesives.