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- Difficult problems and treatment methods of photosensitive adhesive
- TIME： 2020-04-14 HITS：1068
- Difficult problems and treatment methods of photosensitive adhesiveRecently, according to many customers, photosensitive glue is not easy to master, so now let me tell you how to solve the problem of photosensitive glue:Problem one: after printing, the photosensitive film produces bubbles or pinholes1, screen factor: no degreasing or oil removal is not clean, no clean layout2, printing problems: scraping speed is too fast, the blade is not sharp3, the substrate problem: the surface is too dirty4, ink problem: ink viscosity is too high, improper use of thinner, ink problems and suppliers contact.Problem two: unable to develop, to film difficult1 baking problem: the temperature is too high; Too long; Oven failure 2, ink problem: improper dilution ratio; Ink expired.Problem three: the development is not completely surplus glue1. Pre-baking problem: the pre-baking temperature is too high and the pre-baking time is too long; Leave too long after pre-baking2, exposure problem: exposure time is too long, resulting in dot adhesion; The negative is defective3, development problems: developer concentration is not enough, use time is too long; Developing temperature is too low; Pressure is not enough4. Ink problem: the product is expired, not baked after printing, and placed for too long.Problem four: the developing image is easy to be destroyed or the photosensitive film has leakage bottom phenomenon1, pre-drying problem: the temperature is too low, a small amount of liquid residue; Not enough time, printing ink layer is too thick2. Oven problem: no air blowing, resulting in uneven temperature in the oven, local over-baking, local insufficient3, exposure problem: exposure is too small, exposure is not complete4, grinding machine problem: water pollution, resulting in oil pollution layout.Problem five: there is sticky film or indentation on the surface1. Pre-drying problem: the temperature is too low; There's not enough time. The oven has no air blast.2, exposure problem: exposure time is too long, the heat generated makes the temperature is too high; Exposure machine cooling system failure; The vacuum pressure is too high.Problem six: poor etching resistance1, the curing film thickness is not enough;2. Insufficient photosensitive time;3, the corrosion resistance of photosensitive ink is poor, replace the ink.
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