FIELD: special technology. SUBSTANCE: invention relates to wood-material composition used for stopper making. Composition has, wt.-%: wood material (particle size is less 300 mc) 1-85; plastic material of the closed cellular structure (cell size is less 200 mc) containing liquid 1-60, and binding agent 5-70. Stopper consists of wood vegetable material, plastic material, binding agent and also at least one an active component that is a composition proposed. Method of making involves components combining to prepare the homogeneous mass. The latter is placed in forming device followed by heating by rapid increase of temperature to 90-200 C, preferably, to 100-150 C in order to expand cells. Ready stopper is removed from the forming device and kept at 50-120 C, preferably at 70-100 C for some hours. EFFECT: improved method of making and quality of composition. 11 cl
Authors
Dates
1998-04-27—Published
1992-01-14—Filed