Patent ID: 6022615
Filing Date: 2000-02-08
Classification: B27N,B29C,B30B,Y10T

Abstract:
A shaped part for use as a construction, insulating or packaging material, comprising:a mixture of at least one natural, fibre-containing material and at least one biopolymeric natural binder capable of forming a gel-melt under conditions of extrusion,wherein particles of said fibre-containing material are distributed in a structure-defining porous matrix of said at least one binder and said matrix comprises pores or vesicles of an essentially closed-cellular nature obtained by spontaneous expansion and solidification of a gel-melt of said mixture formed under conditions of extrusion at elevated pressure together with elevated temperature or mechanical stress or both and subsequent relief of pressure, andwherein said shaped part further comprises 5 to 85 wt. % of said binder, 6 to 25 wt. % moisture and has an essentially pore-free surface.