Mechanical recycling of nanocellulose containing multilayer packaging films

Jari Vartiainen (Corresponding Author), Satu Pasanen, Eija Kenttä, Mika Vähä-Nissi

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

The aim of this study was to demonstrate mechanical recycling of low density polyethylene (LDPE) films coated with a thin layer of cellulose nanofibrils (CNFs). CNF acts as an effective barrier against oxygen and mineral oil residues. Two different CNF grades were tested, and both were applied onto plasma activated LDPE film using a pilot coating line. The coated films were shredded with the help of liquid nitrogen, compacted and compounded with virgin LDPE and compatibilizer, and processed into cast films and injection molded test specimens. The CNF coatings were completely blent as microscale agglomerates in the LDPE matrix. The effect of these agglomerates on the barrier and heat sealing properties was statistically insignificant compared to recycled uncoated LDPE. The mechanical properties were only moderately changed. CNF-coated LDPE films can therefore be recycled back into films without sacrificing the characteristic properties of the base polymer.

Original languageEnglish
Article number46237
JournalJournal of Applied Polymer Science
Volume135
Issue number19
DOIs
Publication statusPublished - 1 Jan 2018
MoE publication typeA1 Journal article-refereed

Fingerprint

Low density polyethylenes
Polyethylene
Recycling
Packaging
Multilayers
Cellulose
Mineral Oil
Coatings
Compatibilizers
Mineral oils
Liquid nitrogen
Polymers
Oxygen
Plasmas
Mechanical properties

Keywords

  • Biopolymers and renewable polymers
  • Cellulose and other wood products coatings
  • Packaging
  • Polyolefins

Cite this

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abstract = "The aim of this study was to demonstrate mechanical recycling of low density polyethylene (LDPE) films coated with a thin layer of cellulose nanofibrils (CNFs). CNF acts as an effective barrier against oxygen and mineral oil residues. Two different CNF grades were tested, and both were applied onto plasma activated LDPE film using a pilot coating line. The coated films were shredded with the help of liquid nitrogen, compacted and compounded with virgin LDPE and compatibilizer, and processed into cast films and injection molded test specimens. The CNF coatings were completely blent as microscale agglomerates in the LDPE matrix. The effect of these agglomerates on the barrier and heat sealing properties was statistically insignificant compared to recycled uncoated LDPE. The mechanical properties were only moderately changed. CNF-coated LDPE films can therefore be recycled back into films without sacrificing the characteristic properties of the base polymer.",
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Mechanical recycling of nanocellulose containing multilayer packaging films. / Vartiainen, Jari (Corresponding Author); Pasanen, Satu; Kenttä, Eija; Vähä-Nissi, Mika.

In: Journal of Applied Polymer Science, Vol. 135, No. 19, 46237, 01.01.2018.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Mechanical recycling of nanocellulose containing multilayer packaging films

AU - Vartiainen, Jari

AU - Pasanen, Satu

AU - Kenttä, Eija

AU - Vähä-Nissi, Mika

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AB - The aim of this study was to demonstrate mechanical recycling of low density polyethylene (LDPE) films coated with a thin layer of cellulose nanofibrils (CNFs). CNF acts as an effective barrier against oxygen and mineral oil residues. Two different CNF grades were tested, and both were applied onto plasma activated LDPE film using a pilot coating line. The coated films were shredded with the help of liquid nitrogen, compacted and compounded with virgin LDPE and compatibilizer, and processed into cast films and injection molded test specimens. The CNF coatings were completely blent as microscale agglomerates in the LDPE matrix. The effect of these agglomerates on the barrier and heat sealing properties was statistically insignificant compared to recycled uncoated LDPE. The mechanical properties were only moderately changed. CNF-coated LDPE films can therefore be recycled back into films without sacrificing the characteristic properties of the base polymer.

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KW - Polyolefins

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