A PROCESS FOR THE MANUFACTURE OF PINE NEEDLE-ISOCYANATE PREPOLYMER COMPOSITE BOARDS/PANELS AND PRODUCTS THEREOF

摘要

In the present invention, there is disclosed a process for the preparation of pine needle -isocyanate prepolymer composite boards/panels and products made therefrom, wherein pine needles are processed by alkali and / or under combined action of alkali - steam digestion followed by washing, drying, hammer milling and sieving to obtain 1-3 mm size, Mixing of isocyanate prepolymer based adhesives and pine needle furnish in a rotary drum blender to obtain resin coated needle furnishes. The mix so obtained is then placed on the caul plate in a form of loose mat and transferred to a single daylight press under application of heat and pressure. After pressing step, composite boards cooled, conditioned, trimmed and surface finished. The salient features of composite boards are: smooth, good strength, dimensionally stable, adequate screw and nailing ability, good thermal and sound insulation. They can be easily cut and sawn like other wood products.