الفهرس 
Literature Review on Wood-Based PanelsOnly 14 pages are availabe for public view
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Abstract
Due to shortage in local resource of wood. it IS important to
search for other resources that could substitute imported olid wood. Date
palm leaves’ midribs (DPLM) are available as a cheap secondary product
resulting from annual pruning of palms.
Air-dried DPLM of known species were converted into strips of 8
x 12 mrn cross-section, to be a substitute for the core layer of blockboard
Board specimens of 400 x 400 mm and 12 mrn thick have been produced
in a test rig under 3 different levels of pressure from 50 /cm2 to 100
/cm2 and 4 levels of pressing time from 5 to 15 min and 3 levels of
within the temperature range from 90”( to 120°C The gluing proces was
conducted using Urea-formaldehyde as a resin and ammonium chloride as
a hardener The modulus of rupture ( lOR) and the modulu of elasticity
(MOE) in bending, compressive strength (Csm,x), tensile strength (Tsm.,,)
and the glue bond strength (GaS) were determined The results indicate
that the strength properties of DPLM-core blockboards are comparable to
tho e of the common. pruce-core blockboards The results show also that,
there is a specific set of pressing conditions at which the strength
properties attain their highest level.
The aforementioned findings open the po sibility of wide use of
DPLM in core layer as a substitute of imported pruce wood in
blackboards This could be a real support to the relatively new blockboard
industry in Egypt.
Key words: Blockboard, CorePlywood, Date Palm Leaves’ Midrib,
Mechanical Properties