Atmospheric Plasma Treatment in Extrusion Coating: Part 2 Surface Modification of LDPE and PP Coated Papers

Tuominen, Mikko; Lavonen, Juho; Lahti, Johanna; Kuusipalo, Jurkka

doi:10.1002/9781118747308.ch14

Cited by 2 publications

(1 citation statement)

References 22 publications

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“…The films were treated on both sides at a Type CLNE corona station (Softal, Hamburg, Germany). The corona dosage E was calculated from the generator power P divided by the web velocity v and corona electrode width l as shown in Equation (1) [17,34]. After evaluation experiments, we applied corona dosages of 0, 70, 140, 210, and 280 W•min/m 2 for the PET film and 0, 10, 20, 30, 40, and 50 W•min/m 2 for the PP film.…”

Section: Corona Treatmentmentioning

confidence: 99%

Effect of Substrate Strain, Aluminum Thickness and Corona Pretreatment on the Electrical Resistance of Physical Vapor Deposited Aluminum Coatings

Lindner

2020

Coatings

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Aluminum coatings applied to polymer films by physical vapor deposition should be defect-free for applications such as packaging and electronic devices. However, cracks can appear in the aluminum coating as the polymer film stretches, becoming manifest as an increase in resistance. We evaluated the effect of different aluminum thicknesses (10–85 nm), polymer films (polyethylene terephthalate or polypropylene), and corona doses (0–280 W∙min/m2) on the relative increase in resistance during stretching (strain = 0–100%). We found that the thickness of the aluminum coating was inversely related to the increase in resistance. Corona pretreatment led to an increase in surface energy (≤40 mN/m for polypropylene; ≤50 mN/m for polyethylene terephthalate) although high corona doses resulted in overtreatment, which limited the adhesion of aluminum to the substrate and led to a greater increase in resistance. Varying the coating thickness had a much greater effect than the corona pretreatment, suggesting that thicker aluminum coatings are more effective than corona pretreatment as a strategy to increase coating stability. The effect of aluminum thickness and strain on resistance was described using a fit function containing three fit factors.

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Section: Corona Treatmentmentioning

confidence: 99%

Effect of Substrate Strain, Aluminum Thickness and Corona Pretreatment on the Electrical Resistance of Physical Vapor Deposited Aluminum Coatings

Lindner

2020

Coatings

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Surface energy of corona treated PP, PE and PET films, its alteration as function of storage time and the effect of various corona dosages on their bond strength after lamination

Lindner

Rodler

Jesdinszki

et al. 2017

J of Applied Polymer Sci

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The aim of this study was to analyze how corona dosages above recommended levels affect film surface energy and hydrophobic recovery of such treated film surfaces as well as laminate bond strength of laminates made of these films. The adhesive for lamination was a polyurethane‐adhesive with a dry film thickness of ∼5 µm. Polar and dispersive parts of the surface energy were measured frequently according to DIN 55660‐2 (Owens–Wendt–Rabel‐and‐Kaelble method) for up to 140 days after corona treatment. The corona dosage had a value of up to 280 W min/m2. Laminate bond strength was measured according to DIN 55543‐5. The effect of corona treatment was highest for low‐density polyethylene (PE‐LD) films, mean for biaxial‐oriented polypropylene (PP‐BO) films, and lowest for biaxial‐oriented poly(ethylene terephthalate) (PET‐BO) films. With increasing storage time, surface energy decreased, as expected. The higher the effect of corona treatment, the faster the polar part of surface energy decreased. At PE‐LD, laminate bond strength increased with a higher corona dosage from 0.05 to 8.87 mN/15 mm, whereas at PET‐BO and PP‐BO laminate bond strength was so high that samples teared before delamination during bond strength testing. By our results is shown that corona dosages above recommended levels resulted in higher laminate bond strength. Only at PP‐BO a reduction of laminate bond strength due to “overtreatment” was be observed. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45842.

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Atmospheric Plasma Treatment in Extrusion Coating: Part 2 Surface Modification of LDPE and PP Coated Papers

Cited by 2 publications

References 22 publications

Effect of Substrate Strain, Aluminum Thickness and Corona Pretreatment on the Electrical Resistance of Physical Vapor Deposited Aluminum Coatings

Effect of Substrate Strain, Aluminum Thickness and Corona Pretreatment on the Electrical Resistance of Physical Vapor Deposited Aluminum Coatings

Surface energy of corona treated PP, PE and PET films, its alteration as function of storage time and the effect of various corona dosages on their bond strength after lamination

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