Packaging Paper with Overprint Varnish: Morphology, Grease Resistance, and Heat-sealing Strength
Increasing concerns regarding plastic waste and its impact on the environment have prompted a global trend to replace plastic films with fiber-based packaging solutions. Though the heat-sealing of polyolefin films provides a simple approach for realizing flexible packaging, paper does not have the n...
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| Format: | Article |
| Language: | English |
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North Carolina State University
2025-03-01
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| Series: | BioResources |
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| Online Access: | https://ojs.bioresources.com/index.php/BRJ/article/view/24268 |
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| author | Kai Lankinen Mahdi Merabtene Esa Saukkonen Ville Leminen |
| author_facet | Kai Lankinen Mahdi Merabtene Esa Saukkonen Ville Leminen |
| author_sort | Kai Lankinen |
| collection | DOAJ |
| description | Increasing concerns regarding plastic waste and its impact on the environment have prompted a global trend to replace plastic films with fiber-based packaging solutions. Though the heat-sealing of polyolefin films provides a simple approach for realizing flexible packaging, paper does not have the natural attributes required for such applications. Therefore, paper sealability must be achieved by other means such as coating or varnishing. This study accordingly investigated the basics of imparting heat-sealability to packaging paper using overprint varnish applied with a lab coater simulating flexographic printing. The sealing and grease resistance properties of the resulting paper were compared with those of commercially available polyethylene dispersion-coated paper and oriented polypropylene/polyethylene laminate. The results confirmed that sufficient capabilities were realized using the proposed method; though the varnished paper exhibited a lower seal strength than the reference plastic films, it exhibited adequate properties for package sealing regardless of applied temperature. These observations were subsequently discussed to inform recommendations for further investigation and development. |
| format | Article |
| id | doaj-art-ca5b181dbf3e48e4b8ce9cbe9aa5caad |
| institution | OA Journals |
| issn | 1930-2126 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj-art-ca5b181dbf3e48e4b8ce9cbe9aa5caad2025-08-20T02:13:48ZengNorth Carolina State UniversityBioResources1930-21262025-03-01202320632232535Packaging Paper with Overprint Varnish: Morphology, Grease Resistance, and Heat-sealing StrengthKai Lankinen0https://orcid.org/0000-0001-6189-3402Mahdi Merabtene1https://orcid.org/0000-0002-3811-6194Esa Saukkonen2Ville Leminen3https://orcid.org/0000-0001-5854-3321Dr. Lankinen Graphic Innovations Ltd, Finland; Tampere University of Applied Sciences, Tampere, FinlandLappeenranta-Lahti University of Technology LUT, Lappeenranta, FinlandUPM, Research and Development, Lappeenranta, FinlandLappeenranta-Lahti University of Technology LUT, Lappeenranta, FinlandIncreasing concerns regarding plastic waste and its impact on the environment have prompted a global trend to replace plastic films with fiber-based packaging solutions. Though the heat-sealing of polyolefin films provides a simple approach for realizing flexible packaging, paper does not have the natural attributes required for such applications. Therefore, paper sealability must be achieved by other means such as coating or varnishing. This study accordingly investigated the basics of imparting heat-sealability to packaging paper using overprint varnish applied with a lab coater simulating flexographic printing. The sealing and grease resistance properties of the resulting paper were compared with those of commercially available polyethylene dispersion-coated paper and oriented polypropylene/polyethylene laminate. The results confirmed that sufficient capabilities were realized using the proposed method; though the varnished paper exhibited a lower seal strength than the reference plastic films, it exhibited adequate properties for package sealing regardless of applied temperature. These observations were subsequently discussed to inform recommendations for further investigation and development.https://ojs.bioresources.com/index.php/BRJ/article/view/24268heat-sealingvarnishflexographic printingpaperpackaging |
| spellingShingle | Kai Lankinen Mahdi Merabtene Esa Saukkonen Ville Leminen Packaging Paper with Overprint Varnish: Morphology, Grease Resistance, and Heat-sealing Strength BioResources heat-sealing varnish flexographic printing paper packaging |
| title | Packaging Paper with Overprint Varnish: Morphology, Grease Resistance, and Heat-sealing Strength |
| title_full | Packaging Paper with Overprint Varnish: Morphology, Grease Resistance, and Heat-sealing Strength |
| title_fullStr | Packaging Paper with Overprint Varnish: Morphology, Grease Resistance, and Heat-sealing Strength |
| title_full_unstemmed | Packaging Paper with Overprint Varnish: Morphology, Grease Resistance, and Heat-sealing Strength |
| title_short | Packaging Paper with Overprint Varnish: Morphology, Grease Resistance, and Heat-sealing Strength |
| title_sort | packaging paper with overprint varnish morphology grease resistance and heat sealing strength |
| topic | heat-sealing varnish flexographic printing paper packaging |
| url | https://ojs.bioresources.com/index.php/BRJ/article/view/24268 |
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