This article analyzes the causes and provides solutions to the problem of curing wrinkles on screen printed products, which is unique to two-liquid products (which require the addition of a curing agent).

01 Curing wrinkle problem prone to situations

1. Poor solvent tolerance of the substrate when printing on PC-based substrates.

2. Highly soluble solvents are used in the overprinted product after the overprinting of different products. 3.

3. The bridging reaction state of the coating film and the penetration of solvents into the coating film when overprinting after the underlying coating film is fully cured.

02 Curing reaction principle of two-component products

Polyester polyol (coating resin component) + isocyanate (curing agent component) = polyester polyurethane (coating film)