METHOD OF MAKING PACKAGE FOLIATED MATERIAL Russian patent published in 1995 - IPC

FIELD: package. SUBSTANCE: method involves preliminary forming of polyethylene laminated with ethyleneacrylic acid polymer by extrusion through the ring spinneret at 140-180 C, orientation by blowing of obtained sleeve and its laying out along extrusion axis, feeding to the gap the packet to the gap between rolls heated up to 10-40 C. Packet contains paper with polyethylene coating, aluminium foil, melted extrudate of polyethylene with density 15-25 g/cm² at 130-250 C and polyethylene laminated with ethyleneacrylic acid polymer following by layers welding under pressure 3.504.5 kH due to extrudate melt heat. EFFECT: improved method of package making. 3 dwg, 1 tbl