RESOURCE-SAVING MANUFACTURING TECHNOLOGY OF WOOD-POLYMER SHEETS AND PROFILE PRODUCTS

Advantages of use of a wood filler as a component of thermoplastic composite materials (TpCM) with use of a polymeric matrix are considered. The analysis of design of an area of preparation of wood and polymeric composition melt is made. Rational options of design of process of extrusion preparation and formation of TpCM are defined, their advantages and disadvantages are shown. The description of the industrial line for production of wood and polymeric sheets is provided. Recommendations about use of extrusive installations for processing TpCM are made (use of extrusion lines on the basis of a single-screw extruder, and for receiving production with increased requirements to quality – cascade schemes with a twin-screw extruder is preferable). Pictures of finished goods, and also rheological characteristics of wood and polymeric composition melt depending on structure and temperature are given. It is also shown that rheological characteristics of the filled TpCM with use of secondary polymeric raw materials can significantly differ from the corresponding characteristics of primary polymers. Bibl. 28, Fig. 2.