FIELD: composite materials. SUBSTANCE: original sheet materials is first cut into narrow strips that can be creased by the aid of creaser and separated from each other using rotary and guiding rolls. Narrow strips are then transferred to stamping and lamination installation. Lamination procedure combines together strips with polymer films having different widths to extend assortment of final products. Laminated material consisting of creased sheets and polymer film can be cut longitudinally and/or infolded prior to be transferred on take-up reel for storage. EFFECT: increased liquid- and gas-impermeability of sheet material. 39 cl, 9 dwg
