桉木单板贴面无机桉木碎料板制备及性能

Preparation and Properties of Inorganic Eucalyptus Particle Board Laminated with Eucalyptus Veneer

以桉木单板和无机胶黏剂为原料对桉木碎料板进行贴面处理,研究了施胶量、成型压力、脱模养护时间对桉木碎料板弯曲性能的影响以及贴面处理对板材阻燃性能的影响。结果表明:施胶量、成型压力和脱模养护时间对木单板贴面桉木碎料板弯曲性能影响均显著。随着施胶量的增加,板材的静曲强度和弹性模量均先增大后减小,施胶量为320 g/m2时板材静曲强度和弹性模量分别达到最大值35.26 MPa和3863 MPa;随着成型压力的增加,板材的静曲强度和弹性模量也都先增大后减小,成型压力为1.5 MPa时,板材的静曲强度和弹性模量分别达到最大值35.37 MPa和3900 MPa;随着养护时间的增加,板材的静曲强度和弹性模量逐渐增大。养护3周后板材静曲强度和弹性模量基本趋于稳定。贴面处理使板材前期的热释放速率和热释放总量增大,阻燃性能降低。150 s后,基本表现出桉木碎料板贴面前的阻燃性能。

Eucalyptus veneer and inorganic adhesive were taken as raw materials to laminate Eucalyptus particle board. Effects of adhesive consumption,molding pressure and curing time on Eucalyptus particle board＇s flexural property and effect of laminating process on its flame retardant property were studied.The results showed that the effects of adhesive consumption,molding pressure and curing time on Eucalyptus particle board ＇s flexural properties are significant. With increasing content of adhesive consumption,MOR and MOE of board firstly increase and then decrease; when adhesive consumption is320 g / m2,MOR and MOE reach its maximum to 35. 26 MPa and 3863 MPa respectively. With increasing number of molding pressure,MOR and MOE of board firstly increase and then decrease; when molding pressure is 1. 5 MPa,MOR and MOE reach its maximum to 35. 37 MPa and 3900 MPa respectively. With increasing level of curing time,MOR and MOE of board increase gradually; when curing time is 3 weeks,MOR and MOE tend to be stable. After laminating,THR and HRR of it increase at prophase and flame retardant property decrease. After 150 s,flame retardant property of it is same as board without laminating.