IMPACT OF VILLAGE TREE SPECIES ON PHYSICAL AND  MECHANICAL PROPERTIES OF HARDBOARD IN KHULNA  HARDBOARD MILLS LTD., BANGLADESH

M.O.  Hannan; M.N. I.  Khan; A.H.  Chowdhury; S.M.M.  Hasnin

doi:10.53808/KUS.1999.1.2.133-137-se

Authors

M.O. Hannan Forestry and Wood Technology Discipline, Khulna University, Khulna-9208, Bangladesh
M.N. I. Khan Forestry and Wood Technology Discipline, Khulna University, Khulna-9208, Bangladesh
A.H. Chowdhury Forestry and Wood Technology Discipline, Khulna University, Khulna-9208, Bangladesh
S.M.M. Hasnin Research Offiecer, Bangladesh Forest Research Institute, Chittagong, Bangladesh

DOI:

https://doi.org/10.53808/KUS.1999.1.2.133-137-se

Keywords:

Village tree; Wood-physics; Wood-mechanics; Hardboard, Wood Technology

Abstract

The conventional raw materials of Khulna Hardboard Mills Ltd. (KHML) has been only sundri (Heritiera fomes). Due to recent shortfall in raw material supply from the Sundarbans, KHML is now using several village tree species in mixture with sundri. The study was undertaken to assess the changes in physical and mechanical properties of hardboard produced from the mill owing to introduction of some village tree species. The samples were collected and tested for modulus of rupture (MOR) and changes in thickness and weight after immersion in water. Weight and thickness changes of the samples were found significantly higher than that for sundri and US Standard class-1 Hardboard Specifications. A significant correlation was found between weight and thickness changes. The MOR values were found significantly lower than that of sundri and but significantly higher than that of US standard class-1 Hardboard Specifications (minimum) value which indicates that the strength properties of the boards produced from mixed species is satisfactory with respect to US standard but unsatisfactory with respect to sundri.

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