PRIMERLESS PRODUCTION OF POLYISOCYANURATE FLAME-PROOF CONSTRUCTION SANDWICHED PIR-BOARDS Russian patent published in 2015 - IPC E04C2/00 B32B37/00 

FIELD: process engineering.

SUBSTANCE: invention relates to production of construction materials, particularly, PIR-boards. Two reels of self-adhesive decorative protective film and two reels of lining material installed in parallel at appropriate unwinders are fed. Said self-adhesive decorative protective film is applied on top and bottom bands of lining material to laminate one of said bands with film at 20 130°C. Note here that film is applied from above on lining material top band while on bottom band it is applied from below. Then, inner surfaces of top and bottom band sides are processed by corona discharge to up the adhesion. Shaped lining material bands are carried by conveyor at preheating station. Thereafter, components of foam polyisocyanurate polymer components are fed to get the foam polyisocyanurate polymer with further production of continuous block of PIR-board. The latter is conveyed to band press to compact said block of PIR-board. Then, said block of PIR-board is fed to cutting unit to get finished boards to be cooled down.

EFFECT: continuous process, lower costs, higher process line efficiency, non-polluting products.

19 cl, 3 dwg, 3 tbl