Methods<\/p>\n\n\n\n Results and discussion<\/p>\n\n\n\n Conclusions<\/p>\n\n\n\n The packaging industry is under pressure to develop alternative solutions to plastic with paper often being the default choice. However, poor resistance to oil and grease is a natural limitation that need to be addressed to develop more sustainable and safer packaging alternatives solution. This study shows that excellent barrier to oil and grease can be achieved with Cartaseal\u00ae OGB F10. A water-based solution that performs to the highest standards even on folded papers.<\/p>\n\n\n\n Notes: Smither Pira \u201cThe Future of Functional and Barrier Coatings for Paper and Board to 2028\u201d – Visual Feature – Beat Plastic Pollution (unep.org).<\/em><\/p>\n","protected":false},"excerpt":{"rendered":" The first barrier coatings for food packaging were made from synthetic polymeric chemicals known as per – and polyfluoroalkyl substances (PFAS). PFAS are a large family of compounds characterized by having multiple fluorine atoms attached to a saturated hydrophobic alkyl chain and bearing a hydrophilic functional group. This structure gives PFAS the ability to readily … Continued<\/a><\/p>\n","protected":false},"author":2,"featured_media":6816,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[154],"tags":[93],"class_list":["post-6805","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ottobre-24","tag-chemicals"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.cartaecartiere.com\/en\/wp-json\/wp\/v2\/posts\/6805","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cartaecartiere.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cartaecartiere.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cartaecartiere.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cartaecartiere.com\/en\/wp-json\/wp\/v2\/comments?post=6805"}],"version-history":[{"count":3,"href":"https:\/\/www.cartaecartiere.com\/en\/wp-json\/wp\/v2\/posts\/6805\/revisions"}],"predecessor-version":[{"id":6822,"href":"https:\/\/www.cartaecartiere.com\/en\/wp-json\/wp\/v2\/posts\/6805\/revisions\/6822"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cartaecartiere.com\/en\/wp-json\/wp\/v2\/media\/6816"}],"wp:attachment":[{"href":"https:\/\/www.cartaecartiere.com\/en\/wp-json\/wp\/v2\/media?parent=6805"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cartaecartiere.com\/en\/wp-json\/wp\/v2\/categories?post=6805"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cartaecartiere.com\/en\/wp-json\/wp\/v2\/tags?post=6805"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"https:\/\/www.cartaecartiere.com\/wp-content\/uploads\/2024\/10\/ARTICOLI-ottobre-114-1024x518.jpg\")
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The test for oil and grease resistance of the coated paper is performed according to the extended TAPPI T559 method. In this method, solutions of castor oil, toluene and n-heptane are prepared at defined concentrations. The solutions are numbered from 1 (least aggressive) to 16 (the most aggressive). A drop of these solutions is applied to the coated paper. After 15 seconds, the excess of the solution is removed. The highest numbered solution that does not stain the surface of the coated paper is reported as the KIT rating.<\/li>\n\n\n\n
The Cobb Test is performed according to the standard method TAPPI T441 – Cobb Test for Paper and Packaging Industry originally designed for testing water absorptiveness. In this test, a specific amount of olive oil is placed on the surface of a coated paper of defined dimensions. After 1800 seconds, the excess of oil is removed and the weight of the paper sample is measured. The difference between the final and initial weight is reported as oil absorbed by the sample expressed in g\/m2. <\/li>\n\n\n\n
The crease test was performed according to the standard method TAPPI T512 – Creasing Of Flexible Packaging Material Paper Specimens For Testing. In this method, two opposite corners of a square sample of coated paper are brought together to create a crease. A rubber covered crease roller is rolled once over the sample, without applying additional pressure, to form a crease. The sample is them unfolded and the operation is repeated to create two perpendicular creases. The samples are the tested according to the Cobb method. <\/li>\n<\/ul>\n\n\n![](\"https:\/\/www.cartaecartiere.com\/wp-content\/uploads\/2024\/10\/PUBB-ottobre-55.jpg\")
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Paper samples coated with Cartaseal\u00ae OGB F10 and a fluorine-based coatings Cartaguard\u00ae KST respectively, were tested according to the extended TAPPI T559 method. As shown in Fig. 1, Cartaseal\u00ae OGB F10 reaches the highest KIT rating, 16, at a coat weight of 3g\/m2 outperforming the fluorine-based alternative Cartaguard\u00ae KST.<\/li>\n\n\n\n
A paper sample coated with Cartaseal\u00ae OGB F10 was tested according to the Cobb method. The results shown the barrier performance of Cartaseal\u00ae OGB F10 to olive oil. It can be observed a significant drop of the olive oil absorbed by the paper with a coat weight above 5. Oil and grease resistance of folded paper – 3M Test Kit The ability of the coating to maintain its barrier properties after folding is critical to folding box and flexible packaging applications. This is a clear limitation of most coatings available in the market and it\u2019s hindering the replacement of plastic in flexible packaging, such as pouches or wraps. To evaluate the performance of Cartaseal\u00ae OGB F10 for this type of application, the KIT 3M is performed. The results of the KIT tests shown a reduced rating for the fluorine-based product Cartaguard\u00ae KST, dropping from 13 to 5 rating after folding. However, Cartaseal\u00ae OGB F10 is still reaching the highest rating, 16. <\/li>\n\n\n\n
The figures below show the comparative results of the Cobb test, performed with olive oil, on unfolded and folded paper samples coated with Cartaseal\u00ae OGB F10 and a conventional resin. <\/li>\n<\/ul>\n\n\n\n