| Title | Thermoformed products from high-density polyethylene and Softwood kraft pulp |
|---|---|
| ID_Doc | 8217 |
| Authors | Desnoes, E; Deshaies, P; Bideau, B; Rubiano, J |
| Title | Thermoformed products from high-density polyethylene and Softwood kraft pulp |
| Year | 2024 |
| Published | Nordic Pulp & Paper Research Journal, 39.0, 3 |
| Abstract | 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 Cobb1800 value of 10.9 +/- 5.4 gm-2 and oil Cobb1800 value of 13.18 +/- 6.5 gm-2. Samples with high HDPE content demonstrated hydrophobic surface with water contact angle value above 90 degrees. 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. |
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