FILLER OF IMPROVED RIGIDITY FOR MULTI-LAYER PANEL AND METHOD OF ITS MANUFACTURING Russian patent published in 2009 - IPC B32B3/28 B29D16/00 B32B23/00 B21D13/00 

FIELD: technological processes.

SUBSTANCE: invention is related to technologies of fillers production from sheet materials and may be used in production of multi-layer panels applied in aircrafts, construction and other industry fields. Filler is a volume structure from polymer paper in the form of folded sheet stock, both sides of which are coated with binding material. Flat facets of filler are arranged as parallelograms and rectangles linked to each other along all sides. At that flat facets in the form of parallelograms are coupled with creation of vertical walls of filler and are rigidly connected to each other with a binding material, such as thermally set resin. Method for production of filler includes application of binding material on sheet stock in its flat condition, thermal setting of binder until polymerisation extent of not more than 70%. Further sheet stock is shaped till compressed condition of volume structure, at which coupled surfaces of flat stock facets are joined each other and set thermally until final polymerisation of binding material.

EFFECT: improved resistance to loss of stability, when compressing loads are applied to filler.

2 cl, 4 dwg