Paper manufacturers often apply coatings to paper surfaces used for various printing purposes. The coating is batch filtered in order to assure a smooth application and defect-free end product. However, in this coil coating process, small particles can be captured by the doctor blade used in the coatings application. These impurities can leave a streak of uncoated area on the paper after it has been cured, re-rolled and packaged for sale. Such product quality issues can be addressed by integrating an effective classifying filter into the paper coating process to effectively remove any agglomerated particles that foul the doctor blade and lead to streaks on the paper rolls.
The rigid fixed pore structure of Parker domnick hunter’s Fulflo® Durabond™ meltblown filter cartridge eliminates contaminant from passing through the filter and into the coating solution as differential pressure increases. The bi-component polymer fiber construction also avoids shedding and its silicone-free materials won’t alter coating properties. Additionally, the filter’s grooved graded density media maximizes dirt holding capacity. By doing a better job of retaining particles, the filter's performance has a longer service life which lowers overall filtration costs. In providing filtration solutions to the coil coatings process, manufacturers can see improved quality, reduced quality checks, lower labor costs, decreased product waste, minimal disposal costs, and increased production capacity.
This article was written by Chelsea Crawford, Technical Support Specialist, Parker Hannifin.