fulltext.study @t Gmail

An alternative approach to control the oxygen permeation across single-dose coffee capsules

Paper ID Volume ID Publish Year Pages File Format Full-Text
19848 43135 2015 7 PDF Available
Title
An alternative approach to control the oxygen permeation across single-dose coffee capsules
Abstract

•A water-based oxygen barrier hybrid coating for coffee capsules is here presented.•Coatings of approximately 7 μm were sprayed on flame-treated polypropylene capsules.•Coating deposition allowed decreasing the oxygen permeability of ∼35 times.•The barrier performance was also assessed on filled capsules and at high RH.•This approach can represent an alternative design of the packaging for coffee capsules.

The objective of this study was to investigate the potential of a hybrid coating made of pullulan and a silicon-dioxide precursor to act as an oxygen barrier on polypropylene (PP) capsules used for single-dose ground coffee. PP capsules were first treated by an oxidizing flame to allow better adhesion of the water-based coating solution. The barrier performance of the capsules (uncoated and coated) was assessed by a non-invasive approach based on fluorescence quenching. The deposition of the coating (approximately 7.0 μm thick) led to a dramatic decrease in the oxygen permeation across empty capsules at 40 °C and 25% RH (uncoated capsules: 496.91 mL [package 24 h atm]−1; coated capsules: 14.01 mL [package 24 h atm]−1). In the presence of coffee inside the capsules, the barrier performance was even improved (pack permeability 1.87 mL [package 24 h atm]−1), which was ascribed to the residual oxygen inside the capsules at the beginning of the analysis. At 66% RH, the hybrid coating, while still acting as a good barrier, partially lost its performance due to the simultaneous swelling of the polymer matrix and the presence of fractures on the coating surface. The approach presented in this work can present opportunities for an alternative design of the packaging intended for coffee capsules, with a potential advantage also from an environmental perspective represented by the upstream reduction in the use of plastics.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Coating; Coffee; Flame treatment; Packaging; Oxygen permeability; Surface activation
First Page Preview
An alternative approach to control the oxygen permeation across single-dose coffee capsules
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Food Packaging and Shelf Life - Volume 4, June 2015, Pages 19–25
Authors
, , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us