Table 2.

Injection moulding parameters.

Arburg Allrounder 170U 150-30
Injection Velocity	50	mm s${}^{-1}$
Injection Pressure	45	MPa
Cooling Time	15	s
Mould Temperature	30	${}^{\circ }$C
Holding Pressure	40	MPa
Temperature of Plasticizing Unit Zones
Temperature under the Hopper	30	${}^{\circ }$C
Temperature Zone 1	170	${}^{\circ }$C
Temperature Zone 2	185	${}^{\circ }$C
Temperature Zone 3	200	${}^{\circ }$C
Temperature Zone 4	210	${}^{\circ }$C