Common faults and troubleshooting of the hottest p

2022-08-09
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Common faults and troubleshooting of plastic gravure printing ink

1 four vertical bars are connected between the upper beam and the test bench. Water ripple

reason:

a, the printing plate is too deep

b, low ink viscosity or excessive diluent added

solving the hardness test is the most simple and easy experimental method in the mechanical property experiment:

a. Control the printing plate depth during plate making

b. Control the viscosity of ink. The total demand for plastic pipes will continue to grow

c, adopt version wind or adjust the angle of scraper

2. Biting

reason:

a, the ink dries slowly

b, the second color pressure is too high, the printing is too fast, and the viscosity is too high

solution:

a. add quick drying solvent to the first color of seeking technological innovation, and increase the amount of hot air

b, reduce the pressure in the second color

c, reduce the viscosity of the second color ink and slow down the printing speed

3. Adhesion (commonly known as anti adhesion)

reasons:

a, the solvent dries slowly (especially toluene contains nonvolatile substances and smells)

b. The winding pressure is too high during the printing process, and the stacking pressure is too high after printing (especially in high temperature weather)

c. The temperature of hot air drying during printing is too high, which should generally not exceed 40 ℃ -50 ℃ (if special requirements, cold air should also be added before winding to reduce the film temperature), plus humidity (the relative humidity is more than 90%) so that the ink cannot be completely dry

d, the electronic processing is too large (the standard 38 dyne has met the printing requirements), but the film is printed on one side, but the film is processed on both sides, or the local processing effect is too strong

solution:

a. replace the solvent with fast drying and high purity

b. Adjust the winding tension to synchronize the winding and traction, and the printed matter cannot be stacked too high or heavy objects can be stacked on the surface

c. the ambient temperature of the printing place and the finished product warehouse should not be too high, and there should be no heat source and direct sunlight

d, those printed on one side will not be processed on both sides

4. The text starts and ends

reasons:

a, the pressure of the scraper is small, the scraper is too soft, and the four sides of the printing plate are too deep to form a thick ink layer

b, the ink has high viscosity and impurities

c, printing speed is too fast and static electricity is generated

solution:

a. increase the pressure of the knife and replace the hard blade

b, reduce the ink viscosity and filter the ink

c install static eliminator

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