Verfahren zur Herstellung von Isolierplatten aus Vliesstoffabfällen

摘要

The processing foresees the pre-arrangement of the raw material, consisting of the refuses formed by the strips cut long the sides of the nonwoven fabric, for the subsequent mixing acting its tertiary crushing by means of a knife cutting up machine. In the mixing the raw material is initially mechanical mixed with the alumina trihydrate by means of a mixer; then into the mixer are added the other components: unsaturated polyester resin, 1,1 Di(Ter-butylperoxide)cyclohexane, zinc stearate and parabenzoquinone solution to 10% in styren previously mixed by a propeller mixer. The mixing is going on for five minutes and then the obtained shaving mass is discharged by a screw conveyor placed on the mixer bottom. Said shaving mass is then molded with hot pressing at a temperautre of 145 DEG C by means of a punch press with molding pressure of 50 Kg/cm2 and foreseen a molding time of five minutes for each thickness centimeter. In this way four-sided plate insulating boards are formed.