Key technical issues including the selection of base resin

the control of curing reaction and cured structure

and the dispersing of glass fiber fillers in the preparation of glass fiber reinforced phenolic injection molding materials were studied. Differences in the formed structure and morphology and curing rheological properties of phenolic injection molding materials prepared with different types of base resins were also investigated.By using blend resins of resol and novolac as base materials

optimizing raw materials formulation and preparation technology

a new kind of glass fiber reinforced phenolic injection molding material was obtained.The new material showed excellent mechanical properties

heat resistance and good flame retardant as well as suitable injection properties. Its Charpy notch impact strength was 4.3 kJ8226;m-2

flexural strength was 137.4 MPa

heat distortion temperature was 245 ℃ and flame retardant properties passed the attestation of UL 94 V-0. In addition

it showed good dimension stability

insulation properties and had lower-cost advantage.