A study of the effect of injection speed on fibre orientation in simple mouldings of short glass fibre-filled polypropylene

1978 ◽  
Vol 13 (11) ◽  
pp. 2497-2506 ◽  
Author(s):  
P. F. Bright ◽  
R. J. Crowson ◽  
M. J. Folkes
Keyword(s):  
Glass Fibre ◽  
Fibre Orientation ◽  
Injection Speed ◽  
Short Glass Fibre ◽  
Short Glass

Fibre Orientation and Mechanical Properties of Short Glass Fibre Reinforced PP Composites

2005 ◽  
Vol 13 (3) ◽  
pp. 253-262 ◽  
Author(s):  
Minjie Chen ◽  
Chaoying Wan ◽  
Yong Zhang ◽  
Yinxi Zhang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Glass Fibre ◽  
Fibre Orientation ◽  
Orientation Distribution ◽  
Efficiency Factor ◽  
Short Glass Fibre ◽  
Pp Composites ◽  
Short Glass ◽  
Fibre Orientation Distribution

The fibre orientation and distribution in short glass fibre (SGF) reinforced polypropylene (PP) composites were measured and an orientation function ( f) was introduced to describe the fibre orientation distribution. The fibre orientation distribution in the same level plane depended on the fibre position in an injection-moulded plate. The fibres close to the boundary wall of the injection cavity were parallel to the injection direction and those close to the back wall were perpendicular to the injection direction. A commercial maleic anhydride grafted PP (MAPP) was used as a compatibilizer. With the addition of MAPP, the fibre orientation distribution in PP/SGF/MAPP composites was slightly different from that of PP/SGF, but MAPP improved the interfacial adhesion between SGF and PP and consequently the mechanical properties. The use of SGF increased the tensile strength of the PP composites from 26.5 to 45.9 MPa (73% improvement), and for the PP/MAPP/SGF composite the tensile strength increased further to 55.4 MPa. The effect of SGF on the tensile strength can be expressed by a fibre efficiency factor (λσ). The SGF efficiency factor of PP/MAPP/SGF (0.198) was 45% higher than that of PP/SGF (0.137). The impact strength of PP/MAPP/SGF (64.7 MPa) was not only higher than that of PP/SGF (40.8 MPa) by 59% but also higher than that of PP (48.3 MPa) by 34%.

Fibre-orientation measurements in short-glass-fibre composites—II

2001 ◽  
Vol 61 (13) ◽  
pp. 1961-1974 ◽  
Author(s):  
Colin Eberhardt ◽  
Ashley Clarke ◽  
Michel Vincent ◽  
Thomas Giroud ◽  
Sylvain Flouret
Keyword(s):  
Glass Fibre ◽  
Fibre Orientation ◽  
Fibre Composites ◽  
Short Glass Fibre ◽  
Short Glass
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