L-P-509A, FEDERAL SPECIFICATION: PLASTIC SHEET, ROD AND TUBE, LAMINATED, THERMOSETTING (19 JAN 1965) [S/S BY ASTM-D709]
L-P-509A, FEDERAL SPECIFICATION: PLASTIC SHEET, ROD AND TUBE, LAMINATED, THERMOSETTING (19 JAN 1965) [S/S BY ASTM-D709]., This classification covers laminated thermosetting materials consisting of two or more plies or layers of sheet fillers bonded by a thermosetting type of synthetic resin.