| 摘要 |
A method of making a structural panel comprises the following steps: <SL> <LI> i providing timber material; <LI> ii cutting the timber material into chips <LI> iii sorting the chipped timber material into groups comprising a first group having the approximate size range of 1.25 mm - 3.15 mm and a second group having the approximate size range of 3.15 mm - 5.00 mm; <LI> iii mixing chipped timber material from the first group and the second group in the approximate proportions of 1:3 by weight; <LI> iv adding uncured PMDI resin to the mixed chipped timber in the approximate proportion of 2% - 4% by weight; <LI> v adding wax to the mixed chipped timber in the approximate proportion of 0.8% - 2% by weight; <LI> vi mixing the chipped timber, resin and wax together; <LI> vii compressing the mixed chipped timber, resin and wax to a desired panel thickness and a panel density of 700 -750 kg/m3; <LI> viii curing the resin at a temperature of between approximately 190{C and approximately 210 {C for a period of approximately 10-14 seconds for each mm of desired panel thickness, </SL> and also relates to a structural panel made thereby. |
