Fluid absorption during forward roll coating of porous webs

Devisetti, Suresh K.; Bousfield, Douglas W.

doi:10.1016/j.ces.2010.02.042

Cited by 14 publications

(10 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ninness et al used a similar method to study the penetration of coating fluid into the porous web for a metered‐sized‐press coating process. Devisetti and Bousfield extended the model of Ninness et al by taking into account the deformation of the rubber covered roller. They experimentally measured the pressure profile, rubber deformation and film thickness and found that high‐viscosity‐fluid behavior agrees well with model predictions.…”

Section: Iterative Models Coupling the Flows In Region Imentioning

confidence: 99%

“…They built a 3‐D PNM of the paper based on the representative statistical distribution of its microstructure. Their model allows for the effect of microstructural characteristics (such as throat diameter, throat length and coordination number) of paper on penetration to be studied; and it more precisely depicts the spatial distribution of a coating fluid in the paper compared with the macroscale models …”

Section: Microscale and Pore Network Models Of Penetrating Flowmentioning

confidence: 99%

“…Their model allows for the effect of microstructural characteristics (such as throat diameter, throat length and coordination number) of paper on penetration to be studied; and it more precisely depicts the spatial distribution of a coating fluid in the paper compared with the macroscale models. 19,20,[23][24][25][26] Didari 65 built a model of carbon paper that consists of the cross sections of the fibrous structure constructed by periodic surface model, as shown in Figure 6. Using the developed microstructure of carbon paper, Didari 65 generated mesh in the porous domain and studied the penetration process under various slot-coating conditions using CFD finite volume method (implemented by Ansys Fluent).…”

Section: Microscale and Pore Network Models Of Penetrating Flowmentioning

confidence: 99%

“…12 Coating conductive polymer such as poly (3,4-ethylenedioxythiophene) has been used to produce electro-active fabrics. 13 Several important technical challenges exist with coating porous media: coating uniformity, 14 surface morphology, [15][16][17] manufacturing flexibility, 18 and fluid penetration [19][20][21][22][23][24][25][26] to name a few. Of specific interest is the fluid penetration in porous media, which is typically driven by the pressure from external flow field and the surface tension in porous media.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Review on penetration and transport phenomena in porous media during slot die coating

Ding

Harris

2017

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

A distinctive field in the coatings industry is coating of porous media, which has broad applications including paper, textiles, electronics, filtration, and energy sectors. Fluid penetration is an important issue during direct coating of a liquid bead on porous media, which is driven by the pressure from an external flow field and the surface tension in the porous media. Generally, during the coating process, some level of penetration is desirable to obtain specific material properties, but inadequate or excessive penetration is detrimental. To help control the level of penetration, understanding relationships between operating parameters and penetration are highly desirable. In this article, the current state of academic research on modeling penetration in porous media during common coating processes, especially the slot die coating process, is reviewed. Specifically, the challenges, basic ideas, advantages, and disadvantages of macroscale, microscale, and pore-network models on penetration in porous media are discussed. This article concludes with some recommendations for future work.

show abstract

Section: Iterative Models Coupling the Flows In Region Imentioning

confidence: 99%

Section: Microscale and Pore Network Models Of Penetrating Flowmentioning

confidence: 99%

Section: Microscale and Pore Network Models Of Penetrating Flowmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Review on penetration and transport phenomena in porous media during slot die coating

Ding

Harris

2017

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

show abstract

“…Modeling work has been conducted for predicting and controlling the penetration depth during direct coating on porous media . However, a major technical issue that remains is how to determine the pressure in the coating bead.…”

Section: Introductionmentioning

confidence: 99%

Analytical models for predicting penetration depth during slot die coating onto porous media

et al. 2014

View full text Add to dashboard Cite

A series of analytical models have been developed to predict the penetration depth during slot die coating on porous media. Analytical models for both Newtonian and non-Newtonian fluids were derived based on Lubrication Theory, Darcy's law, and a modified Blake-Kozeny equation. Using these models, the penetration depth can be quickly solved and the effects of material properties and processing conditions on penetration depth can be easily investigated. Experiments of coating Newtonian glycerin and non-Newtonian blackstrap molasses onto Toray series carbon paper were conducted to validate developed models. The overall relative error between the predicted and measured penetration depth was found to be typically lower than 20%, which demonstrates the relative accuracy of developed models. Furthermore, based on a parametric study, it was found that the effect of capillary pressure on penetration depth is less than 10% when the ratio of coating bead pressure and capillary pressure is larger than 10.

show abstract

Fluid Penetration in a Deformable Permeable Web Moving Past a Stationary Rigid Solid Cylinder

Polychronopoulos

Papathanasiou

2016

Transp Porous Med

View full text Add to dashboard Cite

Fluid absorption during forward roll coating of porous webs

Cited by 14 publications

References 28 publications

Review on penetration and transport phenomena in porous media during slot die coating

Review on penetration and transport phenomena in porous media during slot die coating

Analytical models for predicting penetration depth during slot die coating onto porous media

Fluid Penetration in a Deformable Permeable Web Moving Past a Stationary Rigid Solid Cylinder

Contact Info

Product

Resources

About