Theory of Permeation through Metal Coated Polymer Films

Prins, W.; Hermans, Jan

doi:10.1021/j150575a017

Cited by 62 publications

(35 citation statements)

References 2 publications

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“…The metallizations are considered not to be layers within the meaning of this equation. This approach has already been explained by Langowski [8]; it does call for a permeance homogenized across virgin film + metallization which can be accounted by the models of defects [8][9][10] of the metallic deposit, by otherwise coherent and impermeable.…”

Section: ∂X ∂Zmentioning

confidence: 99%

VIP service life assessment: Interactions between barrier laminates and core material, and significance of silica core ageing

Yrieix¹,

Morel²,

Pons³

2014

Energy and Buildings

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a b s t r a c tAs a result of temperature and humidity vacuum insulation panels (VIP) age: their thermal resistance decreases due to the combined effect of internal pressure and solid conduction increase. For given conditions this depends on the duration of the exposure and on the permeance of the envelope, as well as on the hygric and thermal behaviour of the core material. This paper begins by assessing the severity of the various building applications with regard to the VIP. It then presents the main behaviours and models needed and explains the life evaluation approach under stationary conditions. Furthermore particular attention is paid to the ageing of silica core material. It concludes that for a realistic estimation of the service life one needs to take into account both the thermal and hygric behaviour of the core material, the permeance of air and water vapour through the envelope, the temperature and humidity service conditions, and the thickness of the panel.

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Section: ∂X ∂Zmentioning

confidence: 99%

VIP service life assessment: Interactions between barrier laminates and core material, and significance of silica core ageing

Yrieix¹,

Morel²,

Pons³

2014

Energy and Buildings

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“…5 Simply stated, this approach assumes that water or gas molecules can traverse within an inorganic layer only through existing defects or pinholes. Thus, for the purposes of this analysis, this layer is taken to be infinitesimally thin and is characterized by a nominal defect (pinhole) size, L h , and an average pinhole density N d (% pinholes/unit area), which is directly related to the average distance between pinholes, L d .…”

Section: Diffusion Modelmentioning

confidence: 99%

Moisture permeability through multilayered barrier films as applied to flexible OLED display

Greener

Vaeth

et al. 2007

J of Applied Polymer Sci

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Strict protection of organic light-emitting diodes (OLEDs) and other optoelectronic materials from direct contact with ambient moisture and oxygen is one of the major challenges in the development of flexible OLED displays and other flexible electronic devices. This problem is typically addressed by the use of polymeric substrates with multilayered barrier coatings comprising alternating organic/inorganic layers. The multilayered barrier approach is critically examined using a numerical model based on a defect-dominated diffusion process combined with experiments involving face-to-face lamination of two barrier films. The modeling results identify two regimes, corresponding to two distinct permeation mechanisms, and provide scaling relationships and general design criteria for multilayered barrier coatings. The results suggest that the most significant gain in barrier performance can be realized when the thickness of the organic/adhesive layer(s) in the multilayered structure is less than the average pinhole (defect) size in the inorganic barrier layer(s).

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“…Moreover, contamination during the evaporation by other gases or dust, anti-block particles in the substrate, as well as mechanical tensions between the substrate and the inorganic coating play an important role. All these factors may lead to cracks or pores in the coating and thus increase the gas transmission of the polymer and coating (Q poly+coat ) [44,45]. In relation to the pore size, different mechanisms for permeation are presented in [46].…”

Section: Permeation Through Organic Substrates and Inorganic Coatingsmentioning

confidence: 99%

“…Trying to describe the permeation through these defects, various models were developed. The first models were created by Prins and Hermans [44], based on which further ideas were presented by e.g., [49][50][51][52][53]. For technically relevant substrate thicknesses and defect sizes, the models can be rewritten approximately as in Equation (6).…”

Section: Permeation Through Organic Substrates and Inorganic Coatingsmentioning

confidence: 99%

Thickness Measurement Methods for Physical Vapor Deposited Aluminum Coatings in Packaging Applications: A Review

Lindner

Schmid

2017

Coatings

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Abstract:The production of barrier packaging materials, e.g., for food, by physical vapor deposition (PVD) of inorganic coatings such as aluminum on polymer substrates is an established and well understood functionalization technique today. In order to achieve a sufficient barrier against gases, a coating thickness of approximately 40 nm aluminum is necessary. This review provides a holistic overview of relevant methods commonly used in the packaging industry as well as in packaging research for determining the aluminum coating thickness. The theoretical background, explanation of methods, analysis and effects on measured values, limitations, and resolutions are provided. In industrial applications, quartz micro balances (QCM) and optical density (OD) are commonly used for monitoring thickness homogeneity. Additionally, AFM (atomic force microscopy), electrical conductivity, eddy current measurement, interference, and mass spectrometry (ICP-MS) are presented as more packaging research related methods. This work aims to be used as a guiding handbook regarding the thickness measurement of aluminum coatings for packaging technologists working in the field of metallization.

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Theory of Permeation through Metal Coated Polymer Films

Cited by 62 publications

References 2 publications

VIP service life assessment: Interactions between barrier laminates and core material, and significance of silica core ageing

VIP service life assessment: Interactions between barrier laminates and core material, and significance of silica core ageing

Moisture permeability through multilayered barrier films as applied to flexible OLED display

Thickness Measurement Methods for Physical Vapor Deposited Aluminum Coatings in Packaging Applications: A Review

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