Bamboo Panel Boards - International Network for Bamboo and Rattan

22B A M B O O P A N E L B O A R D SThe strength properties of MBM made in Vietnam are given in Table 7.Tab/e 6: Properties of UF-bonded BMB made (Thailand)ProoertiesDensityMoisture contentAbsorption- in 2 hours- in 24 hoursSwelling in 2 hours- Width- Length- ThicknessSurface absorption in 2 hoursModulus of ruptureInternal bond strengthValues659 kg/m 311.6%9.1%21 .8%0.4%0.8%4.9%6.6%6.75 kg/mm 20.14 kg/mm 2Table 7: Physical and mechanical properties of BMB (Vietnam)ProoertiesValuesDensity 700-750 kg/m 3Tensile strength30-32 MPaModulus of elasticity35-45 MPaCorrugated roofing sheetBamboo mat corrugated roofing sheets are produced in China (known asbamboo mat corrugated plywood) and, to a limited extent, in Vietnam. Exploratorystudies have recently been initiated in India and the Philippines.CHINAFour layers of mat bonded with UF resin adhesive are used. The top layer isoverlaid with UF resin-impregnated, reprocessed paper. On top of this, PF resinis impregnated by hot-pressing. The production process is as follows:" Drying of mats to 8-12% moisture content;. Application of UF resin;" Overlaying UF resin-impregnated, reprocessed paper;" Pressing between two corrugated cauls in a specially designed press;