... ,*PP10T30F,*PP10T60, PP10T60F*,PP12T30,*PP12T30F,*PP12T60,*PP12T60FT30 mean tissue is 30g/square meter /, T30 can prohibit parts of epoxy resin or ... glue leak into cellcore.T30F mean tissue 30g/square meter with PP film ,T30F make honeycomb combined with ...