Zelfo - An engineering material fully based on renewable resources

M. A. Svoboda, R. W. Lang, R. Bramsteidl, M. Ernegg, W. Stadlbauer

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)


The development of Zelfo was based on a review on technologies for the production of "papier mâche" in the second half of the 19th century. However, in contrast to "papier mâche" Zelfo does not contain any additional bonding agent. Potential raw materials for the production of Zelfo include various plants and wastes with a high cellulose content (e.g., hemp, flax, waste paper). The first production step is a refining process, in which the raw materials are simultaneously hackled and ground and mixed with water. The result of this process is a microfiberpulp with a solid content of 1 to 15 m%, which is subsequently predried, cast or molded into a final shape and dried. Due to the possible variations in raw materials and in the production process, properties of Zelfo can be varied over a certain range. For example, values for density from 0.5 to 1.5 g/cm3, for tensile modulus from 1500 to 6550 MPa and for tensile strength from 7 to 55 MPa can be achieved. Thus, Zelfo is likely to compete with both conventional plastics and chipboard for certain applications.

Original languageEnglish
Pages (from-to)47-58
Number of pages12
JournalMolecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals
Publication statusPublished - 2000
Externally publishedYes
Event5th International Conference on Frontiers of Polymers and Advanced Materials - Poznan, Poland
Duration: 21 Jun 199925 Jun 1999


  • Biodegradable
  • Cellulose
  • Material
  • Renewable resources
  • Zelfo


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