Patent ID: 6149971
Filing Date: 2000-11-21
Classification: B32B,C08J,E04B,Y10S

Abstract:
A method for the production of fireproof panels according to RINA standards, said panels including at least one fireproof sheet which consists of glass fibers and a fireproof phenol-formaldehyde resin, the method comprising the successive steps of:forming a layer of the glass fibers:distributing the fireproof phenol-formaldehyde resin uniformly, in the form of a powder free from solvents, on the layer of glass fibers, in quantities of at least 5 g but no higher than 6 g of the resin per 100 g of the glass fibers;simultaneously compressing and heating the layer and the distributed resin to a temperature at which the resin softens for sufficient time to cause the softening of the resin, thereby impregnating the layer of glass fibers with the resin to form an impregnated layer; andcompressing the impregnated layer at the cross-linking temperature of the resin to obtain said fireproof sheet.