| 摘要 |
<p>Asbestos-free fibre-reinforced material comprises an elastomeric matrix compsn. (I) and small dia. reinforcing acrylic fibres (II) to provide enhanced strength and flexibility to gaskets, tyres, timing belts, power transmission couplings, shock absorbers, sealants, etc., made from the material. (II) have dia. less than 12 (pref. 5-10) microns, length 0.5-3 mm, and min. aspect ratio (L/D) in the range 20-50 (pref. above 100). Also claimed are gaskets produced from such material in which (II) are microdenier mono- or bi-component fibres of a polymer contg. more than 35 wt.% acrylonitrile (AN), and provide the gaskets with greater elongation compared with gaskets reinforced with corresp. fibres having dia. more than 12 microns. Such gaskets may be made by a beater addn. process, or a formed-in-place process.</p> |
