Effect of Prepressing Process on Properties of Flax/Polypropylene Fiber Composites and Comprehensive Cost Analysis
As the crisis of non-renewable energy is approaching,the utilization of biological resources is one of the effec-tive measures to alleviate the energy problem.Flax fiber is one of the ideal biological resources.In order to preserve the mechanical properties of the fiber to the maximum extent,it is necessary to select the type of composite material with processing conditions as close as possible between the composite materials.Therefore,flax fiber and polypropylene fiber were used as raw materials to prepare flax/polypropylene fiber composite materials.The effects of prepressing treatment temperature and time on the micromorphology,tensile properties,bending properties and impact properties of the com-posite materials were studied.The map bag for the front door of a car was prepared by using this material.The compre-hensive performance and cost of the parts were compared and analyzed.The results showed that with the increase of pre-loading temperature,the tensile strength and bending strength of flax/polypropylene fiber composites increased first,then decreased and then increased.The bending modulus increased first and then decreased with the increase of temper-ature.When the preloading temperature was 200℃,the overall performance was the best.With the increase of preload-ing time,the tensile strength and bending strength of flax/polypropylene fiber composite materials both increased first and then decreased,and the bending modulus first decreased slightly,then increased and then decreased.The inflection point appeared when the time was 7 min,and the tensile strength was 38.6 MPa and the bending strength was 51.6 MPa.The bending modulus is 3 845 MPa,and the notch impact strength does not change significantly.Compared with the same type of parts of the traditional PP-TD20 material injection molding,the parts prepared by the flax/polypropyl-ene fiber composite molding process had better rigidity,light weight,and a weight reduction of 20.98％per piece,which had obvious advantages in terms of mold and equipment investment,and the comprehensive input cost was re-duced by 63.6％.
万方数据
维普
