A process for manufacturing plates based on fibrous elements impregnated with polyester resins (Machine-translation by Google Translate, not legally binding)

摘要

Process for manufacturing plates based on fibrous elements impregnated with polyester resins, consisting essentially of starting fibrous material sheets such as paper, cardboard, fabric, fiber conglomerates, felts formed with cut yarns, or the like, drying it beforehand a suitable temperature to remove the moisture that it may contain, impregnate these elements with a preparation of polyester resin with the appropriate catalysts and viscosity correctors, subject these impregnated elements to a prior partial drying at a suitable temperature that does not reach the polymerization of the polyester resin, superimpose the various laminar elements that must enter the composition of the plate to be formed, placing on each of the sides of the thickness of said elements a protective layer or layer and finally compressing the assembly at a relatively low pressure Appropriate plates of glass, polished metal, or other or material or rollers, either continuously or intermittently, subjecting it to a progressive increase in temperature in an appropriate oven or stove and for a few minutes, at a temperature between approximately 100 to 130 [deg.] C., with which polymerization is achieved and hardening of the resin and the plate is finished, from which, after the pressure elements are removed, the protective sheets are detached. (Machine-translation by Google Translate, not legally binding)