Abstract
Formable papers can be used as an alternative to rigid plastics for making 3D shapes for packaging applications. However, commercial use of formable paper is currently limited, due to its poor extensibility. Cellulosic fibres can be combined with polyurethanes to improve the deformability of resulting fibre-polymer composites. This work describes the effect of spray and wet-end addition of polyurethane dispersions to paper to enhance the extensibility and formability of paper. The increase in extensibility was directly proportional to the amount of polyurethane retained in the paper.
Absolute improvements in extensibility were as high as 4 to 6 percentage points. Improved extensibility resulted in better formability of paper, which eventually could allow it to compete with plastic packaging in certain applications.
Absolute improvements in extensibility were as high as 4 to 6 percentage points. Improved extensibility resulted in better formability of paper, which eventually could allow it to compete with plastic packaging in certain applications.
| Original language | English |
|---|---|
| Pages (from-to) | 5360-5376 |
| Journal | BioResources |
| Volume | 13 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 23 May 2018 |
| MoE publication type | A1 Journal article-refereed |
Funding
This work was a part of the ACel programme of the Finnish Bioeconomy Cluster FIBIC. The funding from the Finnish Funding Agency for Technology and Innovation (TEKES), and Academy of Finland is acknowledged.
Keywords
- Paper
- formability
- bonding
- fibre
- polyurethane