1. causes
(1) adhesive and coating weight selection or improper proportion of measurement error; (2) solvent containing alcohol, water or moisture of substrate water more, the main agent of the reaction is not complete; (3) the coating amount is insufficient; (4) curing condition is not appropriate; (5) drying conditions (pressure, and the composite composite composite temperature) improper; (6) composite substrate surface tension is low; (7) composite substrate additive (slip agent, antistatic agent).
2. solutions
(1) re selection of adhesive and coating weight, accurately prepared; (2) the control of water and alcohol solvent; (3) increasing the amount (or replacement, cleaning roller coating): (4) check whether the normal work of the coating and pressure rollers; (5) the replacement of adhesive. The adhesive should be adjusted and used, the use of the remaining adhesive is strictly controlled; 6) control the aging temperature and time, inhibit the precipitation of the slip agent; (7) replace the substrate.