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This article by its own design , processing , preparation of a circle, a triangle , a flat shape , cruciform , trilobal five different cross - sectional shape of the spinneret holes , five different cross-section of the spun fibers with polypropylene particles , and the spun out profiled fiber as a reinforcing fiber and a polyethylene base body made ??of composite material , and conducted a determination of the shape and size of the cross-sectional of the fibers prepared , and then the prepared composites mechanical analysis and dynamic mechanical analysis . The calculated results show that the design of the spinneret holes , designed profiled fiber surface area than round, subject to the same kind of tension and pressure , profiled fiber is smaller than the shape of circular cross-section fiber variable . Of triangular cross-section , the stress analysis of the results showed that the composite profiled fiber arrangement affect the performance of the composite . The results prove that the preparation of the microscopic observation of the contour shape of the fiber before stretching and after stretching did not change significantly , remains substantially the shape of the die orifice design . The tensile test results showed that the profiled fibers are compared with the circular fiber , and its strength at break were higher ; larger the tensile strength of the composite material of the profiled fiber . Dynamic mechanical analysis (DMA) method further study results show that the addition of fiber of different cross-section , to improve the storage modulus of the composite material , and the surface area of the profiled fiber with added increases , the storage modulus of the composite material Etsu large.
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