| 摘要 |
An intumescent seal and gasket (I) is produced by extrusion of a mixture of thermoplastic elastomers, expanded graphite, flame retardant, inorganic filler and inorganic fibres at 180-250 degrees C and forming of the corresponding profile section. Preferably the mixture comprises 20-80 wt.% thermoplastic elastomer, 15-35 wt.% expanded graphite, 1-10 wt.% flame retardant, 10-50 wt.% inorganic filler and 2-20 wt.% inorganic fibre. The thermoplastic is an ethylene-methacrylic acid copolymer, butadiene acrylic acid copolymer, sulphonated polybutadiene or sulphonated EPDM rubber, styrene-butadiene-styrene block copolymer, polyester-polyether copolymer, polypropylene cross-linked EPDM rubber block copolymer or a polyether polyamide block copolymer. |
