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Processing conditions and properties of continuous fiber reinforced GF/PP therm...
Nunes, J. P.; Silva, J. F.; Novo, Paulo; Marques, A. T.The aim of the present work was to study and compare the processing conditions and final mechanical properties of continuous glass-fiber reinforced polypropylene composites (GF/PP) manufactured by using available thermoplastic preimpregnated materials produced by different methods.To assess the quality of the three different GF/PP pre-impregnated materials, final manufactured composite parts were submitted to m...
Production of thermoplastic matrix pre-impregnated materials to manufacture com...
Tinoco, V.; Novo, Paulo; Nunes, J. P.; Silva, J. F.; Marques, A. T.The aim of the work was optimizing the continuous production of new continuous carbon fibers reinforced polypropylene matrix pre-impregnated materials (towpregs). This raw-material, produced by dry deposition of polypropylene (PP) powder in an equipment built by the Institute for Polymers and Composites (IPC), was used to manufacture composite pultruded profiles in a recently developed prototype equipment assem...
Comparing the performance of different thermoplastic matrix pre-impregnated mat...
Santos, M. S.; Nunes, J. P.; Silva, J. F.; Novo, Paulo; Marques, A. T.This work studies and compares the processability into final composite parts of three different pre-impregnated materials, produced by different wetting techniques. All studied pre-impregnated materials were based on a continuous glass fibers reinforced polypropylene matrix (GF/PP) system. One is a tape produced in a previous work by using the melting process (cross-head extrusion) and, from the other two produ...
Processing thermoplastic matrix towpregs by pultrusion
Nunes, J. P.; Silva, J. F.; Novo, PauloIn the work reported herein, glass fiber reinforced polypropylene towpregs, produced continuously at different processing conditions in a dry powder coating equipment (towpregger), were processed into final composite parts in a specially developed prototype pultrusion equipment. The influence of the towpregger fiber pull speed and the furnace temperature on the polymer content of the final towpregs was determin...
Development of a new pultrusion equipment to manufacture thermoplastic matrix c...
Novo, Paulo; Silva, J. F.; Nunes, J. P.; Hattum, F. W. J. van; Marques, A. T.This paper describes the design and manufacture of a low-cost full scale pultrusion prototype equipment and discusses the production and obtained mechanical properties of polypropylene/glass (GF/PP)reinforced composite bars fabricated by using the prototype equipment. Three different GF/PP pre-impregnated raw-materials, a commercial GF/PP comingled system from Vetrotex, a GF/PP powder coated towpreg [1-3] and, ...
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