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Particle Leach Out from PVA Sponge Roller

PVA Sponge Roller Leach Out?

Many fields engineering with demanding cleaning requirement always has the concern of particle leaching out from PVA sponge roller. A PVA sponge with high particle leach out during the cleaning process will cause the possibility for introducing more loose particles on the clean-substance surface.

In this article, we are going to touch the fundamental about the leach out for PVA sponge roller and also the counter action.

Source of Leach Out

Leach out should be understand as the particle from PVA sponge roller being removed out during the application or cleaning process. The particle that leached out from the PVA sponge roller could be the PVA particle or other process material, such as starch, the foaming agent.

For most of the PVA sponge roller, manufacturer is using starch as a foaming agent, please read the article about foaming mechanism. Most of the starch has been reacted during the process and the starch residue has also washed away during the cleaning process, however there are still some starch which not fully wash away during the cleaning reacting process or washing process will slowly loosen and remove during the actually application, this is causing the leach out.

Measure for Leach Out

Leach out always measure by number of count by using liquid particle counter,

LPC Counter

LPC Counter

LPC.  LPC is the particle counter that count particle in the liquid solution.  Before start measuring any LPC count for any PVA sponge roller, field engineer should ensure the solution base line and perform normalization before start adding in the solution with leaching out count.

In order to monitor the consistency for a PVA sponge roller, field engineer shall setup a sampling procedure by soaking and squeezing the solution from the sponge roller for several times then the solution will be sent for LPC count measurement.

Cleaning Process for PVA Sponge Roller

Working toward a lower leach out is always one of the highest challenges for PVA sponge manufacturing factory.  Besides improving the reaction process that rely on the formulation recipe, cleaning at post-foaming process is important too.

PVA sponge roller shall go through an extensive cleaning process by soak and squeeze to ensure most of the loose particles have been removed before go to packaging.  This could be very straight forward processes however there are several details need to consider such as the water LPC count level.

Because soak and squeeze process could be very much repeated process, so there are an automation mechanism that serve for this purpose.

Again, leach out in PVA sponge roller is one of the challenge for industry, make sure you check with the manufacturer for details.

 

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