The International Symposium: Role of Forest Science in Mitigating Climate Change

Memory from The International Symposium: Role of Forest Science in Mitigating Climate Change at Kangwon National University,Republic of Korea, August 2010.


100 Indonesia’s Most Prospective Innovations: 2008

100 I-2 : 2008 is a title of a book and short for :

“100 Indonesia’s Most Prospective Innovations: 2008”.

This book became the origin of Indonesia Innovations Series. Consisting of 248 pages, covering 100 most prospective innovations in 2008. The selection process was done by leaders in the private sectors, and is well worth reading for. Source []

Wood liquids for exterior plywood adhesive

Four kinds of adhesives were derived from woods of Agathis sp., Pinus sp. and Shorea sp. and their mixture. Wood materials (sawdust) were liquefied by heating the materials at 100°C for 30 minutes in the presence of phenol as a reacting solvent and sulfuric acid as a catalyst. The ratio of wood material to phenol was 1:5 (by weight). To the liquefied wood, sodium hydroxide was added, then formaldehyde, with a molar ratio of formaldehyde to phenol of 2.1. Husk powder of respective woods was added as filler at amounts of 0-20% (based on adhesive weight). Three-layer meranti plywoods were prepared based on SNI 01-2704-1992. The viscosity, non volatile matter content, gelatin time and pH of adhesives without filler fulfilled SNI 06-0121-1987 requirements. Moisture content of the prepared plywood met the SNI 01-2704-1992. The shear strength of plywood using wood liquids of Agathis sp., Pinus sp. and mixed liquids and their respective husk powders up to l0% fulfilled the SNI 01-2704-1992 requirements.

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See how plywood is made

WPC: Green Composites for Building Material in the Future

Recently, people in the world realize utilization and reliance on the non environmentally friendly products tend to decrease time by time. However, they also do not want to use natural product with short life time for specific application. Wood plastic composite is environmentally friendly composite product which combine thermoplastic resin as a matrix resin and woody material as a filler and show the best properties of them. The matrix material can be derived from virgin and or recycled thermoplastic resin, while woody filler is a renewable resource. Since 1990’s WPC products have been marketed in USA and satisfied the customers. Mostly of human being needs can be fulfilled from this material with very competitive price. This paper contents a technical review of raw material, process, properties, application, marketing and the future of the wood plastic composites as building material.

Read more….[here]

How WPC is made

How toilet paper is made

Trans-1.4-Isoprene Rubber as Hot Melt Adhesive

The use of maleic anhydride (MAH) modified and unmodified natural and synthetic trans-1.4-isoprene rubber (TIR Gutta Percha and TIR Synthetic) as hot-melt adhesives for plywood manufacturing under various glue spread levels was investigated and their gluability and durability in accordance to SNI 01-5008.2-99 standard were evaluated. TIR modified with MAH (MTIR) either natural (MTIR Gutta Percha) or synthetic (MTIR Synthetic) adhesives could reveal a satisfactory waterproof gluability. This is considered to be due to an enhanced adhesion caused by an occurrence of esterification between the hydroxyl groups of wood and the acid anhydride groups of MTIR during hot pressing. Infra red spectroscopic analysis showed both TIR Gutta Percha and TIR Synthetic have almost similar spectra. In the spectra of MTIR’s after purification, the peak at 1724 and at 1716 cm^-1, respectively for MTIR Synthetic and MTIR Gutta Percha existed, indicated the characteristic for C=O of MAH. Differential thermal analysis showed that before and after modified with MAH, the melting and decomposition temperatures of MTIR Gutta Percha and MTIR Synthetic adhesives were quite different from TIR Gutta Percha and TIR Synthetic adhesives indicated that chemical modification of TIR’s with MAH were occurred. Either MTIR Gutta Percha or MTIR Synthetic adhesives are very appropriate for wood as hot melt adhesives.

Read more….[here]

Studium Generale at NCYU, Taiwan

Memory from studium generale at Department of Forest Products Science, National Chiayi University, Taiwan, June 18 2009