Abstract
Research has been undertaken to determine whether
gelatine and agar can be used together and whether they
have an additive action for improved paper extensibility
and formability. The mechanical properties of paper were
evaluated and adsorption phenomena were investigated,
together with the effect of crosslinker addition to
polymer solutions on the properties of the treated paper.
Polymer solutions were prepared and the crosslinker added
approximately 30s before spraying. It has been
demonstrated that sequential application was only
effective if gelatine was added first followed by agar.
While gelatine easily penetrated in the z-direction and
adsorbed on cellulose, agar formed a film on the surface.
Adsorption studied showed that agar retention was
significantly improved upon gelatine pre-adsorption.
Analysis of paper treated with gelatine and agar revealed
inter-mixing of the polymers, although an agar film was
still formed. Crosslinker addition to the solution
further improved extensibility and tensile strength of
papers. In addition, formability of paper treated with
gelatine and agar enabled production of tray-like,
three-dimensional shapes with 2-3cm in depth.
| Original language | English |
|---|---|
| Pages (from-to) | 452-460 |
| Journal | Nordic Pulp and Paper Research Journal |
| Volume | 30 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2015 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- agar
- gelatine
- extensibility
- formability
- spraying
- papermaking
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Cite this
Vishtal, A., Khakalo, A., Rojas, O., & Retulainen, E. (2015). Improving the extensibility of paper: Sequential spray addition of gelatine and agar. Nordic Pulp and Paper Research Journal, 30(3), 452-460. https://doi.org/10.3183/NPPRJ-2015-30-03-p452-460