moulding technological parameters are preheating temperature 100～110℃, preheating time 10～15 min, moulding pressure ≥25 MPa, moulding temperature 175～180℃, moulding time 0.8～1.0 min·mm~(-1), exhaust ≥3 times.
The properties of the product come up to the national standard of phenolic moulding material (PF2A2), specially its thermal distortion temperature (171℃), insulation resistance (3.0×10~(12)Ω), dielectric strength(5.9 MV.m~(-1)), dielectric loss tangent (0.03) surpass greatly the national standard;
The material foundations moulding the vertebrate are skeletal substances, which are collagen, cartilage and bone.
Some samples were made in an amount sufficient for preparing composites on a Berstorff extruder and specimens were made by injection moulding.
Unidirectional isora fibre reinforced polyester composites were prepared by compression moulding.
PP/banana composites were prepared from commingled PP/banana granules by injection moulding method with special reference to the effect of maleic anhydride modified polypropylene (MAH-PP) concentration.
The enhancement of tensile properties for injection-moulded composites compared to the compression-moulded composites is owing to the occurrence of orientation, better mixing and interaction between the fiber and the matrix during injection moulding.