Thermoformed products from high-density polyethylene and Softwood kraft pulp.

Autor: Desnoes E; Innofibre Research Group, CEGEP de Trois-Rivières, 3351 Boulevard des Forges, Trois-Rivières, Québec G9A5H7, Canada., Deshaies P; Innofibre Research Group, CEGEP de Trois-Rivières, 3351 Boulevard des Forges, Trois-Rivières, Québec G9A5H7, Canada., Bideau B; Innofibre Research Group, CEGEP de Trois-Rivières, 3351 Boulevard des Forges, Trois-Rivières, Québec G9A5H7, Canada., Rubiano J; Dupont inc., 461 Front Road, Kingston, ON, K7L 5A5, Canada.
Jazyk: angličtina
Zdroj: Nordic pulp & paper research journal [Nord Pulp Paper Res J] 2024 May 28; Vol. 39 (3), pp. 339-348. Date of Electronic Publication: 2024 May 28 (Print Publication: 2024).
DOI: 10.1515/npprj-2023-0067
Abstrakt: Plastic recycling, waste minimization such as process outfall valorization promotes a circular economy. Herein, food trays have been produced in the moulded pulp thermoforming process. To this end, high-density polyethylene (HDPE) outfall has been dispersed in water via Poly vinyl alcohol (PVA) addition in a Northern Bleached Softwood Kraft Pulp (NBSKP) slurry. Samples physical and mechanical properties have been evaluated. With an increasing HDPE content, parts air permeability was drastically reduced to a minimum of 2.4 ± 0.8 mL min -1 . In addition, water and grease hold out properties have been increased with minimum water Cobb 1800 value of 10.9 ± 5.4 gm -2 and oil Cobb 1800 value of 13.18 ± 6.5 gm -2 . Samples with high HDPE content demonstrated hydrophobic surface with water contact angle value above 90°. HDPE melting and binding to wood pulp fibers was monitored by SEM images. Regarding the mechanical properties, HDPE induced plastic deformation with a reduced Young modulus by 17 %. Moreover, the addition of HDPE increased wet strength by 81 %. However, the produced food tray composites with high HDPE content demonstrated low repulpability index.
Competing Interests: Competing interests: The authors state no competing interests.
(© 2024 Walter de Gruyter GmbH, Berlin/Boston.)
Databáze: MEDLINE