Q1: What is the primary function of a blister-pack primer, and why is it necessary?
A: Its primary function is to create a heat-sealable, non-porous barrier on paperboard or paper substrates, enabling them to bond securely with plastic blister films during thermoforming. Without it, adhesion would be weak or inconsistent, leading to seal failure, moisture ingress, or package delamination during production and use.

Q2: What materials and packaging applications benefit most from this primer?
A: It is essential for paperboard-based blister cards used in pharmaceutical tablets/capsules, medical device kits, and consumer goods (e.g., electronics, hardware). It ensures compatibility with common blister films like PVC, PET, and Aclar, and supports reliable sealing in high-speed thermoforming and die-cutting processes.

Q3: Are there key performance or processing requirements to ensure optimal results?
A: Yes. Uniform coating coverage and complete drying are critical to prevent blocking or sealing defects. The primer must be fully cured before thermoforming, and heat, pressure, and dwell time during blister sealing should be optimized for the specific film-substrate combination. Testing under production conditions is strongly recommended.