molded in a wide range of temperatures ranging from 225 u00b0 to 300 u00b0 f application_number US 47882600 A description in accordance with a first preferred embodiment of the invention the fiber furnish comprises 20 wt of 2 0 denier u00d7 5 mm type n 720h bicomponent co polyester sheath polyester core binder fiber supplied by kuraray sheath melting temp 225 u00b0 f 20 wt 1 5 denier u00d7 0 5 u2033 type 103 polyester staple fibers supplied by hoechst celanese melting temp 480 u00b0 f 40 wt 6 0 denier u00d7 1 0 u2033 type 103 polyester staple fibers supplied by hoechst celanese melting temp 480 u00b0 f and 20 wt 15 0 denier u00d7 1 5 u2033 type 103 polyester staple fibers supplied by hoechst celanese melting temp 480 u00b0 f all of the foregoing fiber types are sized by the respective manufacturer it will be readily appreciated however that other polyester staple fibers could be used in place of the hoechst celanese fibers specified above also the fiber deniers and lengths can be varied from those set forth above strength and porosity characteristics are imparted to the composite by the combination of polyester fibers employed in the invention in particular the strength of the composite can be improved by varying the polyester fiber content in accordance with the following functional relations a as the polyester denier increases at constant length and.