HydroBlu-FZU Self Cleaning Filter For PCB Ink
HydroBlu-FZU Self Cleaning Filter For PCB Ink

The PCB industry is highly sophisticated, and PCB ink sealing is a core link in the circuit board manufacturing process. Therefore, PCB ink requires relatively high filtration efficiency when filtered. Our newly developed HydroBlu-FZU self-cleaning filter can efficiently remove particulate impurities in PCB ink.

Self-cleaning filters are very common in the ink industry. The efficient HydroBlu-FZU self-cleaning filter can perfectly intercept various impurities, such as:

  • Particulate impurities inside the ink during the grinding and blending process.
  • Pigment particles.
  • Particles of dust floating on the surface of a liquid.
  • Contains mechanical impurities on the wall of the ink barrel.

In addition to PCB ink, HydroBlu-FZU self cleaning filter also plays a huge role in the production of other inks. For example:

  • UV photoprinting ink.
  • Gravure ink.
  • Adagio ink.
  • PVC ink.
  • Flat ink.
  • Mesh plate ink.
  • UV curable ink.
  • Water-based ink.

For the above ink types, HydroBlu-FZU self cleaning filter can exert a good filtering effect. In the actual production process, the raw material we often use is stainless steel 304, which is the most economical and affordable material.

HydroBlu-FZU Self Cleaning Filter For PCB Ink Wastewater

At present, in the circuit board wastewater treatment industry, PCB wastewater is classified as follows:

  • Ink wastewater.
  • Complex wastewater.
  • Integrated wastewater.

Ink wastewater accounts for a relatively small amount in the PCB circuit board wastewater industry, generally accounting for 5% of the drainage volume.

Acid precipitation and slag removal processes are the most common methods for treating ink wastewater. This process is a traditional ink wastewater treatment process and is simple to operate. Directly add sulfuric acid or hydrochloric acid to adjust the pH to 3 ~ 3.5, and the ink pollutants will precipitate through the ink residue and float on the surface. However, it does not require a high technical level of operators and is mostly used by small circuit board companies. As it is a long-term mainstream treatment process for ink wastewater, there are the following technical problems.

  • Poor economic efficiency. The acid precipitation process requires sulfuric acid, which is costly, severely corrodes equipment, and can easily cause acid leakage accidents. As a result, the subsequent biochemical treatment unit is harmed, and the acid dosage is difficult to control. When the pH is between 3 and 3.5, pollutants precipitate and form floating matter (ink residue). When the acidity of the wastewater is insufficient and the pH is adjusted back, the pollutants are redissolved.
  • Ink residue treatment is difficult. The ink residue formed by ink contaminants is highly viscous. The traditional ink wastewater treatment process does not destroy the viscosity of the ink residue. It will frequently cause the filter cloth to become clogged, thus increasing the frequency of cleaning the filter cloth and increasing the labor intensity.

To reduce the difficulty of subsequent processing, we developed the HydroBlu-FZU self-cleaning filter. It appears in the first filtration process to remove large particle impurities in PCB wastewater.

Matters needing attention

  • Viscosity. In some special working conditions, customers will try to speed up production and improve filtration efficiency. When the viscosity is too high, the pressure and filter area remain unchanged, and the speed becomes slower. Therefore, when the viscosity is too high, it is necessary to increase the filtration area and increase the fluid pressure, thereby increasing the filtration speed.
  • PH value. First, select the appropriate material based on the PH value of the ink. If the PH is strongly acidic or alkaline, more corrosion-resistant raw materials should be used, such as super duplex stainless steel.
  • Impurity content. If the impurity content of the ink is very high during filtration, the filtration efficiency of the ordinary filter screen will decrease. At the same time, it also increases the frequency of self-cleaning and shortens the service life of the filter screen. At this time, a specially structured self cleaning filter screen can be used.