Bamboo Panel Boards - International Network for Bamboo and Rattan
Bamboo Panel Boards - International Network for Bamboo and Rattan
Bamboo Panel Boards - International Network for Bamboo and Rattan
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26BAMBOO PANEL BOARDS<strong>for</strong>mwork surface. These advantages have earned it official endorsement, <strong>and</strong> steelframe bamboo curtain plywood has been declared as the ideal <strong>for</strong>mwork material.Table 10: Physical <strong>and</strong> mechanical properties of bamboo curtain board (China)Properties Curtain Laminated curtainDensity (kg/m 3 ) 850 780-850Modulus of rupture, parallel (MPa) 121.2 130.0Modulus of elasticity, parallel (MPa) 12 500 14000impact strength (J/m 2 ) 136 000 136 000<strong>Bamboo</strong> strip boardA panel of high strength, stiffness <strong>and</strong> rigidity, the board is also called bamboostrip plywood <strong>and</strong> bamboo plywood. Resistance to de<strong>for</strong>mation, abrasion <strong>and</strong>weathering characterizes it. Its bending strength, torsion <strong>and</strong> impact resistanceare superior to wood panel <strong>and</strong> there<strong>for</strong>e its application potential - particularlyas plat<strong>for</strong>m boards, vehicle plat<strong>for</strong>ms, rail carriages, ship floors, etc. - is very high.It is produced in China, <strong>and</strong> to a small extent in Costa Rica, Malaysia <strong>and</strong> Vietnam.CHINANext to bamboo mat board, this is the most popular bamboo-based panel <strong>and</strong>is used in vehicle bodies. A national st<strong>and</strong>ard was <strong>for</strong>mulated <strong>for</strong> the panel in 1991(Annex 4). The species commonly used is Phyllostachys pubescens with a culmdiameter of about 9 cm. The technology involves:" Cross cutting of culms to desired strength;. Scraping <strong>and</strong> removal of nodes (outer surface), <strong>and</strong> removal of epidermallayer using a specially designed tool;" Softening, steaming at about 160°C <strong>and</strong> flattening;" Scraping of nodes (inner surface);" Drying to 8% moisture content;" Planing edges <strong>and</strong> surfaces;" Application of PF resin adhesive at the rate of 350-400 g/m 2 ;" Assembly;" Hot-pressing <strong>for</strong> 1 minute/mm thickness at a temperature of 140-150°C <strong>and</strong>a specific pressure of 3 MPa; <strong>and</strong>" Trimming.The major uses are <strong>for</strong>:" Concrete <strong>for</strong>mwork (paper-laminated bamboo strip board is used) - It isfound that reuse is as many as 200 times <strong>and</strong> superior in one or morerespects to <strong>for</strong>mwork of plywood, MDF, steel, plastic, GRP, aluminium, etc.
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