Q1: What is the key advantage of a two-component (2K) system compared to a standard one-component blister coating?
A: The primary advantage is significantly enhanced chemical resistance and cohesive strength through covalent cross-linking. Once mixed, the components react to form a denser, more durable polymer network, providing superior resistance to moisture, plasticizer migration, heat, and mechanical stress—critical for high-barrier or long-shelf-life packaging.

Q2: How is the two-component system prepared and applied, and what is the pot life?
A: The base component and cross-linker must be mixed in a specified ratio immediately before application, typically using a meter-mix dispensing system. Pot life is limited (usually several hours to one day), after which viscosity increases and performance may degrade. Application equipment must be cleaned promptly after use.

Q3: In which demanding applications is a 2K blister coating most necessary?
A: It is essential for high-value or sensitive products such as moisture-sensitive pharmaceuticals, sterile medical devices, industrial chemical packs, and packaging requiring extended shelf life under harsh conditions (e.g., high humidity, temperature fluctuations). It is also used when bonding challenging film-substrate combinations where standard adhesives may fail.