Effects of corona treatment on surface properties of co‐extruded transparent polyethylene film

Current study encompasses that the effect of corona treatment on the outer surface of transparent co‐extruded polyethylene films was at various levels by applying different wattages, in tandem with the blown film extrusion process. A maximum treatment of 42 dynes/cm was achieved at 4.5 KW of applied...

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Bibliographic Details
Published in:Polymer engineering and science 2021-05, Vol.61 (5), p.1449-1462
Main Authors: Das, Bidhan, Chakrabarty, Debabrata, Guha, Chandan, Bose, Saswata
Format: Article
Language:English
Subjects:
Adhesion
Analysis
blown film extrusion
corona treatment
co‐efficient of friction
Extrusion
Fourier transforms
heat‐seal joint strength
Infrared spectra
Mechanical properties
Morphology
Polyethylene
Polyethylene films
Polyolefins
scotch test
Spectrum analysis
Surface properties
Water vapor
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Summary:Current study encompasses that the effect of corona treatment on the outer surface of transparent co‐extruded polyethylene films was at various levels by applying different wattages, in tandem with the blown film extrusion process. A maximum treatment of 42 dynes/cm was achieved at 4.5 KW of applied wattage. The heat seal joint strength of the films sealed at different combinations of treated/untreated surfaces was evaluated and an untreated/untreated surface combination was found to exhibit maximum strength (2.8 kgf/25 mm), while a treated/treated surface combination showed the minimum (1.41 kgf/25 mm) under identical conditions of sealing and testing. The peel adhesion to ascertain the treatment level on the treated surfaces was inspected by a standard Scotch tape method, and the results exhibited a linear relationship between the applied wattage and the pulling force of adhesion. The Fourier transform infrared spectroscopy (FTIR) spectra of the treated and untreated film samples in an attenuated total reflection (ATR) mode showed the peaks' characteristics mostly of polyolefin films. The morphologies of the treated surfaces displayed relatively rough surface compared to the untreated one. The barrier properties of the treated films in respect of water vapor and oxygen transmission rate do not undergo any appreciable change.
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.25663