Residual Solvents
Definition
Solvent remaining after curing, affecting performance and safety.
Historical Background
1980s: detection technology became a quality indicator.
Example
Pungent smell of new tape is evaporating solvent. Invisible killer.
Formula
Residual Solvent (ppm) = Residual Mass / Tape Mass x 10^6
Core Concepts
Quality hazard: causes shrinkage, bubbles, reduced bonding.
Extended Applications
Ordinary: <1000 ppm; food: <100; medical: <50; electronic: <10; solvent-free: 0.