| abstract |
The present invention is a process for pultruding fiber reinforced phenolic resin products, in which the phenolic resin normally has a viscosity ranging from 3,000 to 5,000 cps at 25 DEG C. and is heated to maintain a viscosity ranging from 800 to 2,000 cps during the impregnating step. A die having a temperature profile which is particularly suitable for use in the present process is also disclosed, which has substantially three different heating temperatures along the pultrusion direction. Furthermore, a postcuring treatment for improving the mechanical and physical properties of the pultruded products is also disclosed in the present invention. |